Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/rdflib/plugins/sparql/operators.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 """
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2 This contains evaluation functions for expressions
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3
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4 They get bound as instances-methods to the CompValue objects from parserutils
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5 using setEvalFn
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6
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7 """
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8
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9 import sys
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10 import re
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11 import math
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12 import random
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13 import uuid
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14 import hashlib
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15 import urllib.request, urllib.error, urllib.parse
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16
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17 from decimal import Decimal, ROUND_HALF_UP, InvalidOperation
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18
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19 import operator as pyop # python operators
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20
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21 import isodate
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22
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23 from rdflib.plugins.sparql.parserutils import CompValue, Expr
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24 from rdflib.plugins.sparql.datatypes import XSD_DTs, type_promotion
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25 from rdflib import URIRef, BNode, Variable, Literal, XSD, RDF
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26 from rdflib.term import Node
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27
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28 from pyparsing import ParseResults
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29
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30 from rdflib.plugins.sparql.sparql import SPARQLError, SPARQLTypeError
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31 from functools import reduce
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32
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33
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34 # closed namespace, langString isn't in it
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35 RDF_langString = URIRef(RDF.uri + "langString")
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36
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37
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38 def Builtin_IRI(expr, ctx):
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39 """
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40 http://www.w3.org/TR/sparql11-query/#func-iri
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41 """
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42
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43 a = expr.arg
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44
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45 if isinstance(a, URIRef):
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46 return a
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47 if isinstance(a, Literal):
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48 return ctx.prologue.absolutize(URIRef(a))
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49
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50 raise SPARQLError('IRI function only accepts URIRefs or Literals/Strings!')
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51
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52
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53 def Builtin_isBLANK(expr, ctx):
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54 return Literal(isinstance(expr.arg, BNode))
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55
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56
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57 def Builtin_isLITERAL(expr, ctx):
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58 return Literal(isinstance(expr.arg, Literal))
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59
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60
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61 def Builtin_isIRI(expr, ctx):
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62 return Literal(isinstance(expr.arg, URIRef))
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63
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64
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65 def Builtin_isNUMERIC(expr, ctx):
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66 try:
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67 numeric(expr.arg)
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68 return Literal(True)
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69 except:
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70 return Literal(False)
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71
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72
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73 def Builtin_BNODE(expr, ctx):
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74 """
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75 http://www.w3.org/TR/sparql11-query/#func-bnode
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76 """
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77
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78 a = expr.arg
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79
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80 if a is None:
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81 return BNode()
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82
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83 if isinstance(a, Literal):
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84 return ctx.bnodes[a] # defaultdict does the right thing
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85
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86 raise SPARQLError(
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87 'BNode function only accepts no argument or literal/string')
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88
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89
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90 def Builtin_ABS(expr, ctx):
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91 """
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92 http://www.w3.org/TR/sparql11-query/#func-abs
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93 """
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94
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95 return Literal(abs(numeric(expr.arg)))
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96
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97
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98 def Builtin_IF(expr, ctx):
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99 """
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100 http://www.w3.org/TR/sparql11-query/#func-if
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101 """
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102
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103 return expr.arg2 if EBV(expr.arg1) else expr.arg3
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104
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105
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106 def Builtin_RAND(expr, ctx):
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107 """
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108 http://www.w3.org/TR/sparql11-query/#idp2133952
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109 """
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110
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111 return Literal(random.random())
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112
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113
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114 def Builtin_UUID(expr, ctx):
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115 """
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116 http://www.w3.org/TR/sparql11-query/#func-strdt
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117 """
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118
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119 return URIRef(uuid.uuid4().urn)
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120
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121
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122 def Builtin_STRUUID(expr, ctx):
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123 """
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124 http://www.w3.org/TR/sparql11-query/#func-strdt
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125 """
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126
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127 return Literal(str(uuid.uuid4()))
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128
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129
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130 def Builtin_MD5(expr, ctx):
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131 s = string(expr.arg).encode("utf-8")
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132 return Literal(hashlib.md5(s).hexdigest())
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133
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134
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135 def Builtin_SHA1(expr, ctx):
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136 s = string(expr.arg).encode("utf-8")
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137 return Literal(hashlib.sha1(s).hexdigest())
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138
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139
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140 def Builtin_SHA256(expr, ctx):
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141 s = string(expr.arg).encode("utf-8")
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142 return Literal(hashlib.sha256(s).hexdigest())
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143
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144
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145 def Builtin_SHA384(expr, ctx):
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146 s = string(expr.arg).encode("utf-8")
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147 return Literal(hashlib.sha384(s).hexdigest())
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148
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149
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150 def Builtin_SHA512(expr, ctx):
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151 s = string(expr.arg).encode("utf-8")
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152 return Literal(hashlib.sha512(s).hexdigest())
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153
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154
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155 def Builtin_COALESCE(expr, ctx):
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156 """
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157 http://www.w3.org/TR/sparql11-query/#func-coalesce
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158 """
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159 for x in expr.get('arg', variables=True):
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160 if x is not None and not isinstance(x, (SPARQLError, Variable)):
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161 return x
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162 raise SPARQLError(
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163 "COALESCE got no arguments that did not evaluate to an error")
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164
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165
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166 def Builtin_CEIL(expr, ctx):
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167 """
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168 http://www.w3.org/TR/sparql11-query/#func-ceil
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169 """
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170
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171 l = expr.arg
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172 return Literal(int(math.ceil(numeric(l))), datatype=l.datatype)
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173
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174
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175 def Builtin_FLOOR(expr, ctx):
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176 """
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177 http://www.w3.org/TR/sparql11-query/#func-floor
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178 """
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179 l = expr.arg
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180 return Literal(int(math.floor(numeric(l))), datatype=l.datatype)
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181
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182
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183 def Builtin_ROUND(expr, ctx):
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184 """
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185 http://www.w3.org/TR/sparql11-query/#func-round
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186 """
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187
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188 # This used to be just math.bound
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189 # but in py3k bound was changed to
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190 # "round-to-even" behaviour
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191 # this is an ugly work-around
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192 l = expr.arg
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193 v = numeric(l)
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194 v = int(Decimal(v).quantize(1, ROUND_HALF_UP))
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195 return Literal(v, datatype=l.datatype)
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196
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197
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198 def Builtin_REGEX(expr, ctx):
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199 """
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200 http://www.w3.org/TR/sparql11-query/#func-regex
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201 Invokes the XPath fn:matches function to match text against a regular
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202 expression pattern.
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203 The regular expression language is defined in XQuery 1.0 and XPath 2.0
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204 Functions and Operators section 7.6.1 Regular Expression Syntax
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205 """
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206
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207 text = string(expr.text)
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208 pattern = string(expr.pattern)
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209 flags = expr.flags
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210
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211 cFlag = 0
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212 if flags:
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213 # Maps XPath REGEX flags (http://www.w3.org/TR/xpath-functions/#flags)
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214 # to Python's re flags
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215 flagMap = dict(
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216 [('i', re.IGNORECASE), ('s', re.DOTALL), ('m', re.MULTILINE)])
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217 cFlag = reduce(pyop.or_, [flagMap.get(f, 0) for f in flags])
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218
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219 return Literal(bool(re.search(str(pattern), text, cFlag)))
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220
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221
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222 def Builtin_REPLACE(expr, ctx):
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223 """
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224 http://www.w3.org/TR/sparql11-query/#func-substr
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225 """
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226 text = string(expr.arg)
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227 pattern = string(expr.pattern)
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228 replacement = string(expr.replacement)
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229 flags = expr.flags
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230
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231 # python uses \1, xpath/sparql uses $1
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232 replacement = re.sub('\\$([0-9]*)', r'\\\1', replacement)
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233
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234 def _r(m):
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235
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236 # Now this is ugly.
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237 # Python has a "feature" where unmatched groups return None
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238 # then re.sub chokes on this.
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239 # see http://bugs.python.org/issue1519638 , fixed and errs in py3.5
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240
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241 # this works around and hooks into the internal of the re module...
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242
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243 # the match object is replaced with a wrapper that
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244 # returns "" instead of None for unmatched groups
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245
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246 class _m():
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247 def __init__(self, m):
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248 self.m = m
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249 self.string = m.string
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250
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251 def group(self, n):
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252 return m.group(n) or ""
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253
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254 return re._expand(pattern, _m(m), replacement)
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255
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256 cFlag = 0
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257 if flags:
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258 # Maps XPath REGEX flags (http://www.w3.org/TR/xpath-functions/#flags)
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259 # to Python's re flags
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260 flagMap = dict(
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261 [('i', re.IGNORECASE), ('s', re.DOTALL), ('m', re.MULTILINE)])
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262 cFlag = reduce(pyop.or_, [flagMap.get(f, 0) for f in flags])
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263
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264 # @@FIXME@@ either datatype OR lang, NOT both
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265
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266 # this is necessary due to different treatment of unmatched groups in
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267 # python versions. see comments above in _r(m).
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268 compat_r = str(replacement) if sys.version_info[:2] >= (3, 5) else _r
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269
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270 return Literal(re.sub(str(pattern), compat_r, text, cFlag),
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271 datatype=text.datatype, lang=text.language)
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272
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273
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274 def Builtin_STRDT(expr, ctx):
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275 """
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276 http://www.w3.org/TR/sparql11-query/#func-strdt
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277 """
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278
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279 return Literal(str(expr.arg1), datatype=expr.arg2)
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280
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281
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282 def Builtin_STRLANG(expr, ctx):
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283 """
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284 http://www.w3.org/TR/sparql11-query/#func-strlang
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285 """
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286
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287 s = string(expr.arg1)
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288 if s.language or s.datatype:
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289 raise SPARQLError('STRLANG expects a simple literal')
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290
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291 # TODO: normalisation of lang tag to lower-case
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292 # should probably happen in literal __init__
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293 return Literal(str(s), lang=str(expr.arg2).lower())
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294
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295
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296 def Builtin_CONCAT(expr, ctx):
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297 """
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298 http://www.w3.org/TR/sparql11-query/#func-concat
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299 """
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300
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301 # dt/lang passed on only if they all match
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302
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303 dt = set(x.datatype for x in expr.arg)
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304 dt = dt.pop() if len(dt) == 1 else None
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305
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306 lang = set(x.language for x in expr.arg)
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307 lang = lang.pop() if len(lang) == 1 else None
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308
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309 return Literal("".join(string(x)
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310 for x in expr.arg), datatype=dt, lang=lang)
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311
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312
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313 def _compatibleStrings(a, b):
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314 string(a)
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315 string(b)
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316
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317 if b.language and a.language != b.language:
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318 raise SPARQLError('incompatible arguments to str functions')
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319
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320
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321 def Builtin_STRSTARTS(expr, ctx):
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322 """
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323 http://www.w3.org/TR/sparql11-query/#func-strstarts
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324 """
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325
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326 a = expr.arg1
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327 b = expr.arg2
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328 _compatibleStrings(a, b)
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329
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330 return Literal(a.startswith(b))
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331
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332
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333 def Builtin_STRENDS(expr, ctx):
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334 """
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335 http://www.w3.org/TR/sparql11-query/#func-strends
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336 """
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337 a = expr.arg1
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338 b = expr.arg2
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339
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340 _compatibleStrings(a, b)
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341
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342 return Literal(a.endswith(b))
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343
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344
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345 def Builtin_STRBEFORE(expr, ctx):
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346 """
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347 http://www.w3.org/TR/sparql11-query/#func-strbefore
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348 """
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349
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350 a = expr.arg1
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351 b = expr.arg2
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352 _compatibleStrings(a, b)
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353
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354 i = a.find(b)
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355 if i == -1:
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356 return Literal("")
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357 else:
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358 return Literal(a[:i], lang=a.language, datatype=a.datatype)
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359
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360
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361 def Builtin_STRAFTER(expr, ctx):
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362 """
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363 http://www.w3.org/TR/sparql11-query/#func-strafter
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364 """
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365
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366 a = expr.arg1
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367 b = expr.arg2
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368 _compatibleStrings(a, b)
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369
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370 i = a.find(b)
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371 if i == -1:
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372 return Literal("")
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373 else:
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374 return Literal(a[i + len(b):], lang=a.language, datatype=a.datatype)
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375
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376
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377 def Builtin_CONTAINS(expr, ctx):
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378 """
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379 http://www.w3.org/TR/sparql11-query/#func-strcontains
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380 """
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381
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382 a = expr.arg1
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383 b = expr.arg2
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384 _compatibleStrings(a, b)
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385
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386 return Literal(b in a)
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387
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388
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389 def Builtin_ENCODE_FOR_URI(expr, ctx):
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390 return Literal(urllib.parse.quote(string(expr.arg).encode("utf-8")))
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391
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392
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393 def Builtin_SUBSTR(expr, ctx):
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394 """
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diff changeset
395 http://www.w3.org/TR/sparql11-query/#func-substr
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396 """
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397
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398 a = string(expr.arg)
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399
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400 start = numeric(expr.start) - 1
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401
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402 length = expr.length
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403 if length is not None:
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404 length = numeric(length) + start
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405
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406 return Literal(a[start:length], lang=a.language, datatype=a.datatype)
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407
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408
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409 def Builtin_STRLEN(e, ctx):
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410 l = string(e.arg)
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411
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412 return Literal(len(l))
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413
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414
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415 def Builtin_STR(e, ctx):
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416 arg = e.arg
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417 if isinstance(arg, SPARQLError):
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418 raise arg
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419 return Literal(str(arg)) # plain literal
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420
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421
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422 def Builtin_LCASE(e, ctx):
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423 l = string(e.arg)
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424
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425 return Literal(l.lower(), datatype=l.datatype, lang=l.language)
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426
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427
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428 def Builtin_LANGMATCHES(e, ctx):
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429 """
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430 http://www.w3.org/TR/sparql11-query/#func-langMatches
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431
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432
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433 """
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434 langTag = string(e.arg1)
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435 langRange = string(e.arg2)
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436
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437 if str(langTag) == "":
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438 return Literal(False) # nothing matches empty!
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439
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440 return Literal(_lang_range_check(langRange, langTag))
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441
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442
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443 def Builtin_NOW(e, ctx):
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444 """
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445 http://www.w3.org/TR/sparql11-query/#func-now
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446 """
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447 return Literal(ctx.now)
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448
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449
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450 def Builtin_YEAR(e, ctx):
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451 d = datetime(e.arg)
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452 return Literal(d.year)
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453
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454
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455 def Builtin_MONTH(e, ctx):
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456 d = datetime(e.arg)
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457 return Literal(d.month)
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458
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459
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460 def Builtin_DAY(e, ctx):
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461 d = datetime(e.arg)
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462 return Literal(d.day)
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463
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464
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465 def Builtin_HOURS(e, ctx):
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466 d = datetime(e.arg)
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467 return Literal(d.hour)
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468
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469
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470 def Builtin_MINUTES(e, ctx):
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471 d = datetime(e.arg)
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472 return Literal(d.minute)
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473
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474
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475 def Builtin_SECONDS(e, ctx):
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476 """
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477 http://www.w3.org/TR/sparql11-query/#func-seconds
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478 """
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479 d = datetime(e.arg)
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480 return Literal(d.second, datatype=XSD.decimal)
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481
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482
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483 def Builtin_TIMEZONE(e, ctx):
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484 """
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485 http://www.w3.org/TR/sparql11-query/#func-timezone
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486
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487 :returns: the timezone part of arg as an xsd:dayTimeDuration.
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diff changeset
488 :raises: an error if there is no timezone.
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489 """
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490 dt = datetime(e.arg)
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491 if not dt.tzinfo:
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492 raise SPARQLError('datatime has no timezone: %r' % dt)
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493
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494 delta = dt.tzinfo.utcoffset(ctx.now)
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495
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496 d = delta.days
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497 s = delta.seconds
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498 neg = ""
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499
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500 if d < 0:
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501 s = -24 * 60 * 60 * d - s
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502 d = 0
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503 neg = "-"
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504
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505 h = s / (60 * 60)
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506 m = (s - h * 60 * 60) / 60
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diff changeset
507 s = s - h * 60 * 60 - m * 60
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508
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509 tzdelta = "%sP%sT%s%s%s" % (neg,
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diff changeset
510 "%dD" % d if d else "",
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diff changeset
511 "%dH" % h if h else "",
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512 "%dM" % m if m else "",
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513 "%dS" % s if not d and not h and not m else "")
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514
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515 return Literal(tzdelta, datatype=XSD.dayTimeDuration)
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516
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517
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518 def Builtin_TZ(e, ctx):
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519 d = datetime(e.arg)
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520 if not d.tzinfo:
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521 return Literal("")
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diff changeset
522 n = d.tzinfo.tzname(d)
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523 if n == "UTC":
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524 n = "Z"
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parents:
diff changeset
525 return Literal(n)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
526
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
527
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
528 def Builtin_UCASE(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
529 l = string(e.arg)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
530
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
531 return Literal(l.upper(), datatype=l.datatype, lang=l.language)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
532
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
533
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
534 def Builtin_LANG(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
535
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
536 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
537 http://www.w3.org/TR/sparql11-query/#func-lang
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
538
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
539 Returns the language tag of ltrl, if it has one. It returns "" if ltrl has
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
540 no language tag. Note that the RDF data model does not include literals
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
541 with an empty language tag.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
542 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
543
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
544 l = literal(e.arg)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
545 return Literal(l.language or "")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
546
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
547
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
548 def Builtin_DATATYPE(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
549 l = e.arg
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
550 if not isinstance(l, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
551 raise SPARQLError('Can only get datatype of literal: %r' % l)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
552 if l.language:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
553 return RDF_langString
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
554 if not l.datatype and not l.language:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
555 return XSD.string
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
556 return l.datatype
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
557
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
558
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
559 def Builtin_sameTerm(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
560 a = e.arg1
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
561 b = e.arg2
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
562 return Literal(a == b)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
563
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
564
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
565 def Builtin_BOUND(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
566 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
567 http://www.w3.org/TR/sparql11-query/#func-bound
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
568 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
569 n = e.get('arg', variables=True)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
570
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
571 return Literal(not isinstance(n, Variable))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
572
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
573
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
574 def Builtin_EXISTS(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
575 # damn...
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
576 from rdflib.plugins.sparql.evaluate import evalPart
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
577
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
578 exists = e.name == 'Builtin_EXISTS'
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
579
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
580 ctx = ctx.ctx.thaw(ctx) # hmm
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
581 for x in evalPart(ctx, e.graph):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
582 return Literal(exists)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
583 return Literal(not exists)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
584
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
585
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
586 def Function(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
587 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
588 Custom functions (and casts!)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
589 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
590
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
591 if e.iri in XSD_DTs:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
592 # a cast
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
593
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
594 if not e.expr:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
595 raise SPARQLError("Nothing given to cast.")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
596 if len(e.expr) > 1:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
597 raise SPARQLError("Cannot cast more than one thing!")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
598
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
599 x = e.expr[0]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
600
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
601 if e.iri == XSD.string:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
602
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
603 if isinstance(x, (URIRef, Literal)):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
604 return Literal(x, datatype=XSD.string)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
605 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
606 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
607 "Cannot cast term %r of type %r" % (x, type(x)))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
608
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
609 if not isinstance(x, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
610 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
611 "Can only cast Literals to non-string data-types")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
612
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
613 if x.datatype and not x.datatype in XSD_DTs:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
614 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
615 "Cannot cast literal with unknown datatype: %r" % x.datatype)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
616
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
617 if e.iri == XSD.dateTime:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
618 if x.datatype and x.datatype not in (XSD.dateTime, XSD.string):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
619 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
620 "Cannot cast %r to XSD:dateTime" % x.datatype)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
621 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
622 return Literal(isodate.parse_datetime(x), datatype=e.iri)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
623 except:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
624 raise SPARQLError("Cannot interpret '%r' as datetime" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
625
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
626 if x.datatype == XSD.dateTime:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
627 raise SPARQLError("Cannot cast XSD.dateTime to %r" % e.iri)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
628
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
629 if e.iri in (XSD.float, XSD.double):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
630 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
631 return Literal(float(x), datatype=e.iri)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
632 except:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
633 raise SPARQLError("Cannot interpret '%r' as float" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
634
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
635 elif e.iri == XSD.decimal:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
636 if "e" in x or "E" in x: # SPARQL/XSD does not allow exponents in decimals
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
637 raise SPARQLError("Cannot interpret '%r' as decimal" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
638 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
639 return Literal(Decimal(x), datatype=e.iri)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
640 except:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
641 raise SPARQLError("Cannot interpret '%r' as decimal" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
642
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
643 elif e.iri == XSD.integer:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
644 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
645 return Literal(int(x), datatype=XSD.integer)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
646 except:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
647 raise SPARQLError("Cannot interpret '%r' as int" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
648
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
649 elif e.iri == XSD.boolean:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
650 # # I would argue that any number is True...
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
651 # try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
652 # return Literal(bool(int(x)), datatype=XSD.boolean)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
653 # except:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
654 if x.lower() in ("1", "true"):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
655 return Literal(True)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
656 if x.lower() in ("0", "false"):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
657 return Literal(False)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
658
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
659 raise SPARQLError("Cannot interpret '%r' as bool" % x)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
660 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
661 raise Exception("I do not know how to cast to %r" % e.iri)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
662
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
663 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
664 raise SPARQLError('Unknown function %r"%e.iri')
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
665
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
666 # TODO: Custom functions!
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
667
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
668
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
669 def UnaryNot(expr, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
670 return Literal(not EBV(expr.expr))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
671
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
672
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
673 def UnaryMinus(expr, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
674 return Literal(-numeric(expr.expr))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
675
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
676
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
677 def UnaryPlus(expr, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
678 return Literal(+numeric(expr.expr))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
679
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
680
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
681 def MultiplicativeExpression(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
682
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
683 expr = e.expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
684 other = e.other
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
685
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
686 # because of the way the mul-expr production handled operator precedence
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
687 # we sometimes have nothing to do
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
688 if other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
689 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
690 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
691 res = Decimal(numeric(expr))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
692 for op, f in zip(e.op, other):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
693 f = numeric(f)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
694
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
695 if type(f) == float:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
696 res = float(res)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
697
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
698 if op == '*':
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
699 res *= f
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
700 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
701 res /= f
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
702 except (InvalidOperation, ZeroDivisionError):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
703 raise SPARQLError('divide by 0')
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
704
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
705 return Literal(res)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
706
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
707
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
708 def AdditiveExpression(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
709
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
710 expr = e.expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
711 other = e.other
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
712
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
713 # because of the way the add-expr production handled operator precedence
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
714 # we sometimes have nothing to do
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
715 if other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
716 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
717
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
718 res = numeric(expr)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
719
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
720 dt = expr.datatype
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
721
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
722 for op, term in zip(e.op, other):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
723 n = numeric(term)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
724 if isinstance(n, Decimal) and isinstance(res, float):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
725 n = float(n)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
726 if isinstance(n, float) and isinstance(res, Decimal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
727 res = float(res)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
728
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
729 dt = type_promotion(dt, term.datatype)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
730
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
731 if op == '+':
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
732 res += n
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
733 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
734 res -= n
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
735
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
736 return Literal(res, datatype=dt)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
737
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
738
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
739 def RelationalExpression(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
740
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
741 expr = e.expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
742 other = e.other
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
743 op = e.op
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
744
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
745 # because of the way the add-expr production handled operator precedence
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
746 # we sometimes have nothing to do
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
747 if other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
748 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
749
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
750 ops = dict([('>', lambda x, y: x.__gt__(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
751 ('<', lambda x, y: x.__lt__(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
752 ('=', lambda x, y: x.eq(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
753 ('!=', lambda x, y: x.neq(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
754 ('>=', lambda x, y: x.__ge__(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
755 ('<=', lambda x, y: x.__le__(y)),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
756 ('IN', pyop.contains),
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
757 ('NOT IN', lambda x, y: not pyop.contains(x, y))])
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
758
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
759 if op in ('IN', 'NOT IN'):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
760
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
761 res = (op == 'NOT IN')
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
762
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
763 error = False
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
764
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
765 if other == RDF.nil:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
766 other = []
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
767
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
768 for x in other:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
769 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
770 if x == expr:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
771 return Literal(True ^ res)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
772 except SPARQLError as e:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
773 error = e
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
774 if not error:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
775 return Literal(False ^ res)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
776 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
777 raise error
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
778
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
779 if not op in ('=', '!=', 'IN', 'NOT IN'):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
780 if not isinstance(expr, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
781 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
782 "Compare other than =, != of non-literals is an error: %r" %
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
783 expr)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
784 if not isinstance(other, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
785 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
786 "Compare other than =, != of non-literals is an error: %r" %
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
787 other)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
788 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
789 if not isinstance(expr, Node):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
790 raise SPARQLError('I cannot compare this non-node: %r' % expr)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
791 if not isinstance(other, Node):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
792 raise SPARQLError('I cannot compare this non-node: %r' % other)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
793
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
794 if isinstance(expr, Literal) and isinstance(other, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
795
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
796 if expr.datatype != None and expr.datatype not in XSD_DTs and other.datatype != None and other.datatype not in XSD_DTs:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
797 # in SPARQL for non-XSD DT Literals we can only do =,!=
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
798 if op not in ('=', '!='):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
799 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
800 'Can only do =,!= comparisons of non-XSD Literals')
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
801
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
802 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
803 r = ops[op](expr, other)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
804 if r == NotImplemented:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
805 raise SPARQLError('Error when comparing')
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
806 except TypeError as te:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
807 raise SPARQLError(*te.args)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
808 return Literal(r)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
809
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
810
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
811 def ConditionalAndExpression(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
812
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
813 # TODO: handle returned errors
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
814
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
815 expr = e.expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
816 other = e.other
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
817
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
818 # because of the way the add-expr production handled operator precedence
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
819 # we sometimes have nothing to do
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
820 if other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
821 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
822
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
823 return Literal(all(EBV(x) for x in [expr] + other))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
824
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
825
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
826 def ConditionalOrExpression(e, ctx):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
827
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
828 # TODO: handle errors
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
829
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
830 expr = e.expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
831 other = e.other
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
832
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
833 # because of the way the add-expr production handled operator precedence
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
834 # we sometimes have nothing to do
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
835 if other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
836 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
837 # A logical-or that encounters an error on only one branch
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
838 # will return TRUE if the other branch is TRUE and an error
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
839 # if the other branch is FALSE.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
840 error = None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
841 for x in [expr] + other:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
842 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
843 if EBV(x):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
844 return Literal(True)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
845 except SPARQLError as e:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
846 error = e
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
847 if error:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
848 raise error
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
849 return Literal(False)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
850
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
851
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
852 def not_(arg):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
853 return Expr('UnaryNot', UnaryNot, expr=arg)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
854
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
855
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
856 def and_(*args):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
857 if len(args) == 1:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
858 return args[0]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
859
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
860 return Expr('ConditionalAndExpression', ConditionalAndExpression,
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
861 expr=args[0], other=list(args[1:]))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
862
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
863 TrueFilter = Expr('TrueFilter', lambda _1, _2: Literal(True))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
864
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
865
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
866 def simplify(expr):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
867 if isinstance(expr, ParseResults) and len(expr) == 1:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
868 return simplify(expr[0])
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
869
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
870 if isinstance(expr, (list, ParseResults)):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
871 return list(map(simplify, expr))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
872 if not isinstance(expr, CompValue):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
873 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
874 if expr.name.endswith('Expression'):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
875 if expr.other is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
876 return simplify(expr.expr)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
877
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
878 for k in list(expr.keys()):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
879 expr[k] = simplify(expr[k])
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
880 # expr['expr']=simplify(expr.expr)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
881 # expr['other']=simplify(expr.other)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
882
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
883 return expr
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
884
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
885
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
886 def literal(s):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
887 if not isinstance(s, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
888 raise SPARQLError("Non-literal passed as string: %r" % s)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
889 return s
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
890
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
891
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
892 def datetime(e):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
893 if not isinstance(e, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
894 raise SPARQLError("Non-literal passed as datetime: %r" % e)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
895 if not e.datatype == XSD.dateTime:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
896 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
897 "Literal with wrong datatype passed as datetime: %r" % e)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
898 return e.toPython()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
899
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
900
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
901 def string(s):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
902 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
903 Make sure the passed thing is a string literal
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
904 i.e. plain literal, xsd:string literal or lang-tagged literal
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
905 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
906 if not isinstance(s, Literal):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
907 raise SPARQLError("Non-literal passes as string: %r" % s)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
908 if s.datatype and s.datatype != XSD.string:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
909 raise SPARQLError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
910 "Non-string datatype-literal passes as string: %r" % s)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
911 return s
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
912
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
913
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
914 def numeric(expr):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
915 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
916 return a number from a literal
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
917 http://www.w3.org/TR/xpath20/#promotion
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
918
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
919 or TypeError
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
920 """
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diff changeset
921
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922 if not isinstance(expr, Literal):
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diff changeset
923 raise SPARQLTypeError("%r is not a literal!" % expr)
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924
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925 if expr.datatype not in (XSD.float, XSD.double,
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diff changeset
926 XSD.decimal, XSD.integer,
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diff changeset
927 XSD.nonPositiveInteger, XSD.negativeInteger,
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diff changeset
928 XSD.nonNegativeInteger, XSD.positiveInteger,
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parents:
diff changeset
929 XSD.unsignedLong, XSD.unsignedInt,
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diff changeset
930 XSD.unsignedShort, XSD.unsignedByte,
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diff changeset
931 XSD.long, XSD.int, XSD.short, XSD.byte):
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diff changeset
932 raise SPARQLTypeError("%r does not have a numeric datatype!" % expr)
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diff changeset
933
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934 return expr.toPython()
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935
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936
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937 def EBV(rt):
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938 """
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939 * If the argument is a typed literal with a datatype of xsd:boolean,
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diff changeset
940 the EBV is the value of that argument.
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diff changeset
941 * If the argument is a plain literal or a typed literal with a
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diff changeset
942 datatype of xsd:string, the EBV is false if the operand value
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diff changeset
943 has zero length; otherwise the EBV is true.
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diff changeset
944 * If the argument is a numeric type or a typed literal with a datatype
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diff changeset
945 derived from a numeric type, the EBV is false if the operand value is
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diff changeset
946 NaN or is numerically equal to zero; otherwise the EBV is true.
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diff changeset
947 * All other arguments, including unbound arguments, produce a type error.
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diff changeset
948
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949 """
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950
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951 if isinstance(rt, Literal):
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952
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953 if rt.datatype == XSD.boolean:
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954 return rt.toPython()
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955
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956 elif rt.datatype == XSD.string or rt.datatype is None:
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957 return len(rt) > 0
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958
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959 else:
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960 pyRT = rt.toPython()
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961
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962 if isinstance(pyRT, Literal):
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963 # Type error, see: http://www.w3.org/TR/rdf-sparql-query/#ebv
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964 raise SPARQLTypeError(
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965 "http://www.w3.org/TR/rdf-sparql-query/#ebv - ' + \
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966 'Could not determine the EBV for : %r" % rt)
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967 else:
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968 return bool(pyRT)
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969
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970 else:
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971 raise SPARQLTypeError(
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972 "http://www.w3.org/TR/rdf-sparql-query/#ebv - ' + \
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973 'Only literals have Boolean values! %r" % rt)
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974
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975
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976 def _lang_range_check(range, lang):
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977 """
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978 Implementation of the extended filtering algorithm, as defined in point
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979 3.3.2, of U{RFC 4647<http://www.rfc-editor.org/rfc/rfc4647.txt>}, on
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980 matching language ranges and language tags.
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981 Needed to handle the C{rdf:PlainLiteral} datatype.
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982 @param range: language range
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983 @param lang: language tag
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984 @rtype: boolean
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985
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986 @author: U{Ivan Herman<a href="http://www.w3.org/People/Ivan/">}
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987
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988 Taken from `RDFClosure/RestrictedDatatype.py`__
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diff changeset
989
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990 .. __:http://dev.w3.org/2004/PythonLib-IH/RDFClosure/RestrictedDatatype.py
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991
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992 """
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993 def _match(r, l):
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994 """
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diff changeset
995 Matching of a range and language item: either range is a wildcard
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diff changeset
996 or the two are equal
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diff changeset
997 @param r: language range item
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diff changeset
998 @param l: language tag item
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999 @rtype: boolean
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1000 """
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1001 return r == '*' or r == l
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diff changeset
1002
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diff changeset
1003 rangeList = range.strip().lower().split('-')
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diff changeset
1004 langList = lang.strip().lower().split('-')
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1005 if not _match(rangeList[0], langList[0]):
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diff changeset
1006 return False
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1007 if len(rangeList) > len(langList):
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1008 return False
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1009
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1010 return all(_match(*x) for x in zip(rangeList, langList))