Mercurial > repos > shellac > sam_consensus_v3

annotate env/lib/python3.9/site-packages/rdflib_jsonld/context.py @ 0:4f3585e2f14b draft default tip

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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author shellac
date Mon, 22 Mar 2021 18:12:50 +0000
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1 # -*- coding: utf-8 -*-
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2 """
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3 Implementation of the JSON-LD Context structure. See:
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4
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5 http://json-ld.org/
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6
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7 """
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8 from collections import namedtuple
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9 from rdflib.namespace import RDF
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10
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11 from ._compat import str, str
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12 from .keys import (BASE, CONTAINER, CONTEXT, GRAPH, ID, INDEX, LANG, LIST,
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13 REV, SET, TYPE, VALUE, VOCAB)
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14 from . import errors
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15 from .util import source_to_json, urljoin, urlsplit, split_iri, norm_url
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16
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17
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18 NODE_KEYS = set([LANG, ID, TYPE, VALUE, LIST, SET, REV, GRAPH])
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19
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20 class Defined(int): pass
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21 UNDEF = Defined(0)
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22
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23
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24 class Context(object):
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25
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26 def __init__(self, source=None, base=None):
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27 self.language = None
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28 self.vocab = None
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29 self.base = base
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30 self.doc_base = base
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31 self.terms = {}
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32 # _alias maps NODE_KEY to list of aliases
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33 self._alias = {}
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34 self._lookup = {}
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35 self._prefixes = {}
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36 self.active = False
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37 if source:
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38 self.load(source)
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39
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40 @property
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41 def base(self):
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42 return self._base
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43
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44 @base.setter
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45 def base(self, base):
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46 if base:
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47 hash_index = base.find('#')
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48 if hash_index > -1:
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49 base = base[0:hash_index]
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50 self._base = self.resolve_iri(base) if (
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51 hasattr(self, '_base') and base is not None) else base
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52 self._basedomain = '%s://%s' % urlsplit(base)[0:2] if base else None
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53
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54 def subcontext(self, source):
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55 # IMPROVE: to optimize, implement SubContext with parent fallback support
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56 ctx = Context()
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57 ctx.language = self.language
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58 ctx.vocab = self.vocab
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59 ctx.base = self.base
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60 ctx.doc_base = self.doc_base
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61 ctx._alias = self._alias.copy()
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62 ctx.terms = self.terms.copy()
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63 ctx._lookup = self._lookup.copy()
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64 ctx._prefixes = self._prefixes.copy()
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65 ctx.load(source)
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66 return ctx
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67
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68 def get_id(self, obj):
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69 return self._get(obj, ID)
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70
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71 def get_type(self, obj):
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72 return self._get(obj, TYPE)
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73
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74 def get_language(self, obj):
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75 return self._get(obj, LANG)
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76
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77 def get_value(self, obj):
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78 return self._get(obj, VALUE)
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79
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80 def get_graph(self, obj):
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81 return self._get(obj, GRAPH)
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82
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83 def get_list(self, obj):
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84 return self._get(obj, LIST)
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85
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86 def get_set(self, obj):
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87 return self._get(obj, SET)
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88
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89 def get_rev(self, obj):
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90 return self._get(obj, REV)
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91
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92 def _get(self, obj, key):
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93 for alias in self._alias.get(key, []):
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94 if alias in obj:
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95 return obj.get(alias)
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96 return obj.get(key)
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97
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98 def get_key(self, key):
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99 return self.get_keys(key)[0]
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100
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101 def get_keys(self, key):
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102 return self._alias.get(key, [key])
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103
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104 lang_key = property(lambda self: self.get_key(LANG))
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105 id_key = property(lambda self: self.get_key(ID))
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106 type_key = property(lambda self: self.get_key(TYPE))
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107 value_key = property(lambda self: self.get_key(VALUE))
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108 list_key = property(lambda self: self.get_key(LIST))
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109 rev_key = property(lambda self: self.get_key(REV))
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110 graph_key = property(lambda self: self.get_key(GRAPH))
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111
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112 def add_term(self, name, idref, coercion=UNDEF, container=UNDEF,
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113 language=UNDEF, reverse=False):
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114 term = Term(idref, name, coercion, container, language, reverse)
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115 self.terms[name] = term
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116 self._lookup[(idref, coercion or language, container, reverse)] = term
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117 self._prefixes[idref] = name
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118
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119 def find_term(self, idref, coercion=None, container=UNDEF,
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120 language=None, reverse=False):
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121 lu = self._lookup
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122 if coercion is None:
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123 coercion = language
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124 if coercion is not UNDEF and container:
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125 found = lu.get((idref, coercion, container, reverse))
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parents:
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126 if found: return found
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parents:
diff changeset
127 if coercion is not UNDEF:
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parents:
diff changeset
128 found = lu.get((idref, coercion, UNDEF, reverse))
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parents:
diff changeset
129 if found: return found
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parents:
diff changeset
130 if container:
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parents:
diff changeset
131 found = lu.get((idref, coercion, container, reverse))
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parents:
diff changeset
132 if found: return found
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parents:
diff changeset
133 elif language:
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parents:
diff changeset
134 found = lu.get((idref, UNDEF, LANG, reverse))
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parents:
diff changeset
135 if found: return found
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parents:
diff changeset
136 else:
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parents:
diff changeset
137 found = lu.get((idref, coercion or UNDEF, SET, reverse))
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parents:
diff changeset
138 if found: return found
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parents:
diff changeset
139 return lu.get((idref, UNDEF, UNDEF, reverse))
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parents:
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140
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parents:
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141 def resolve(self, curie_or_iri):
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parents:
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142 iri = self.expand(curie_or_iri, False)
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parents:
diff changeset
143 if self.isblank(iri):
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parents:
diff changeset
144 return iri
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parents:
diff changeset
145 return self.resolve_iri(iri)
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parents:
diff changeset
146
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parents:
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147 def resolve_iri(self, iri):
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parents:
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148 return norm_url(self._base, iri)
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parents:
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149
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parents:
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150 def isblank(self, ref):
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parents:
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151 return ref.startswith('_:')
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parents:
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152
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parents:
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153 def expand(self, term_curie_or_iri, use_vocab=True):
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parents:
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154 if use_vocab:
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parents:
diff changeset
155 term = self.terms.get(term_curie_or_iri)
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parents:
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156 if term:
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parents:
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157 return term.id
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parents:
diff changeset
158 is_term, pfx, local = self._prep_expand(term_curie_or_iri)
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parents:
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159 if pfx == '_':
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parents:
diff changeset
160 return term_curie_or_iri
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parents:
diff changeset
161 if pfx is not None:
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parents:
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162 ns = self.terms.get(pfx)
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parents:
diff changeset
163 if ns and ns.id:
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parents:
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164 return ns.id + local
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parents:
diff changeset
165 elif is_term and use_vocab:
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parents:
diff changeset
166 if self.vocab:
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parents:
diff changeset
167 return self.vocab + term_curie_or_iri
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parents:
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168 return None
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parents:
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169 return self.resolve_iri(term_curie_or_iri)
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parents:
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170
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parents:
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171 def shrink_iri(self, iri):
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parents:
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172 ns, name = split_iri(str(iri))
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parents:
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173 pfx = self._prefixes.get(ns)
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parents:
diff changeset
174 if pfx:
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parents:
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175 return ":".join((pfx, name))
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parents:
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176 elif self._base:
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parents:
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177 if str(iri) == self._base:
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parents:
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178 return ""
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parents:
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179 elif iri.startswith(self._basedomain):
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parents:
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180 return iri[len(self._basedomain):]
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parents:
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181 return iri
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parents:
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182
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parents:
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183 def to_symbol(self, iri):
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parents:
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184 iri = str(iri)
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parents:
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185 term = self.find_term(iri)
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parents:
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186 if term:
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parents:
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187 return term.name
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parents:
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188 ns, name = split_iri(iri)
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parents:
diff changeset
189 if ns == self.vocab:
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parents:
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190 return name
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parents:
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191 pfx = self._prefixes.get(ns)
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parents:
diff changeset
192 if pfx:
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parents:
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193 return ":".join((pfx, name))
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parents:
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194 return iri
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parents:
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195
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parents:
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196 def load(self, source, base=None):
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parents:
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197 self.active = True
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parents:
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198 sources = []
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parents:
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199 source = source if isinstance(source, list) else [source]
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parents:
diff changeset
200 self._prep_sources(base, source, sources)
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parents:
diff changeset
201 for source_url, source in sources:
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parents:
diff changeset
202 self._read_source(source, source_url)
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parents:
diff changeset
203
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parents:
diff changeset
204 def _prep_sources(self, base, inputs, sources, referenced_contexts=None,
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parents:
diff changeset
205 in_source_url=None):
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parents:
diff changeset
206 referenced_contexts = referenced_contexts or set()
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parents:
diff changeset
207 for source in inputs:
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parents:
diff changeset
208 if isinstance(source, str):
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parents:
diff changeset
209 source_url = urljoin(base, source)
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parents:
diff changeset
210 if source_url in referenced_contexts:
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parents:
diff changeset
211 raise errors.RECURSIVE_CONTEXT_INCLUSION
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parents:
diff changeset
212 referenced_contexts.add(source_url)
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parents:
diff changeset
213 source = source_to_json(source_url)
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parents:
diff changeset
214 if CONTEXT not in source:
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parents:
diff changeset
215 raise errors.INVALID_REMOTE_CONTEXT
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parents:
diff changeset
216 else:
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parents:
diff changeset
217 source_url = in_source_url
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parents:
diff changeset
218
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parents:
diff changeset
219 if isinstance(source, dict):
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parents:
diff changeset
220 if CONTEXT in source:
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parents:
diff changeset
221 source = source[CONTEXT]
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parents:
diff changeset
222 source = source if isinstance(source, list) else [source]
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parents:
diff changeset
223 if isinstance(source, list):
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parents:
diff changeset
224 self._prep_sources(base, source, sources, referenced_contexts, source_url)
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parents:
diff changeset
225 else:
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parents:
diff changeset
226 sources.append((source_url, source))
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parents:
diff changeset
227
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parents:
diff changeset
228 def _read_source(self, source, source_url=None):
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parents:
diff changeset
229 self.vocab = source.get(VOCAB, self.vocab)
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parents:
diff changeset
230 for key, value in list(source.items()):
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shellac
parents:
diff changeset
231 if key == LANG:
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parents:
diff changeset
232 self.language = value
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parents:
diff changeset
233 elif key == VOCAB:
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parents:
diff changeset
234 continue
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parents:
diff changeset
235 elif key == BASE:
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shellac
parents:
diff changeset
236 if source_url:
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shellac
parents:
diff changeset
237 continue
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shellac
parents:
diff changeset
238 self.base = value
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parents:
diff changeset
239 else:
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parents:
diff changeset
240 self._read_term(source, key, value)
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parents:
diff changeset
241
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parents:
diff changeset
242 def _read_term(self, source, name, dfn):
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parents:
diff changeset
243 idref = None
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parents:
diff changeset
244 if isinstance(dfn, dict):
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parents:
diff changeset
245 #term = self._create_term(source, key, value)
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parents:
diff changeset
246 rev = dfn.get(REV)
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parents:
diff changeset
247 idref = rev or dfn.get(ID, UNDEF)
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parents:
diff changeset
248 if idref == TYPE:
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parents:
diff changeset
249 idref = str(RDF.type)
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parents:
diff changeset
250 elif idref is not UNDEF:
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shellac
parents:
diff changeset
251 idref = self._rec_expand(source, idref)
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shellac
parents:
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252 elif ':' in name:
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253 idref = self._rec_expand(source, name)
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254 elif self.vocab:
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255 idref = self.vocab + name
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256 coercion = dfn.get(TYPE, UNDEF)
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257 if coercion and coercion not in (ID, TYPE, VOCAB):
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258 coercion = self._rec_expand(source, coercion)
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259 self.add_term(name, idref, coercion,
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260 dfn.get(CONTAINER, UNDEF), dfn.get(LANG, UNDEF), bool(rev))
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261 else:
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262 if isinstance(dfn, str):
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263 idref = self._rec_expand(source, dfn)
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264 self.add_term(name, idref)
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265
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266 if idref in NODE_KEYS:
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267 self._alias.setdefault(idref, []).append(name)
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268
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269 def _rec_expand(self, source, expr, prev=None):
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270 if expr == prev or expr in NODE_KEYS:
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271 return expr
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272
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273 is_term, pfx, nxt = self._prep_expand(expr)
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274 if pfx:
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275 iri = self._get_source_id(source, pfx)
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276 if iri is None:
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277 if pfx + ':' == self.vocab:
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278 return expr
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279 else:
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280 term = self.terms.get(pfx)
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281 if term:
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282 iri = term.id
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283
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284 if iri is None:
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285 nxt = expr
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286 else:
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287 nxt = iri + nxt
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288 else:
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289 nxt = self._get_source_id(source, nxt) or nxt
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290 if ':' not in nxt and self.vocab:
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291 return self.vocab + nxt
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292
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293 return self._rec_expand(source, nxt, expr)
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294
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295 def _prep_expand(self, expr):
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296 if ':' not in expr:
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297 return True, None, expr
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298 pfx, local = expr.split(':', 1)
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299 if not local.startswith('//'):
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300 return False, pfx, local
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301 else:
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302 return False, None, expr
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303
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304 def _get_source_id(self, source, key):
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305 # .. from source dict or if already defined
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306 term = source.get(key)
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307 if term is None:
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308 dfn = self.terms.get(key)
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309 if dfn:
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310 term = dfn.id
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311 elif isinstance(term, dict):
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312 term = term.get(ID)
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313 return term
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314
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315
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316 Term = namedtuple('Term',
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317 'id, name, type, container, language, reverse')
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318 Term.__new__.__defaults__ = (UNDEF, UNDEF, UNDEF, False)