Mercurial > repos > shellac > guppy_basecaller
annotate env/lib/python3.7/site-packages/prov/identifier.py @ 0:26e78fe6e8c4 draft
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author | shellac |
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date | Sat, 02 May 2020 07:14:21 -0400 |
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0
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1 from __future__ import (absolute_import, division, print_function, |
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2 unicode_literals) |
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3 |
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4 import six |
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5 |
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6 __author__ = 'Trung Dong Huynh' |
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7 __email__ = 'trungdong@donggiang.com' |
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8 |
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9 |
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10 @six.python_2_unicode_compatible |
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11 class Identifier(object): |
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12 """Base class for all identifiers and also represents xsd:anyURI.""" |
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13 # TODO: make Identifier an "abstract" base class and move xsd:anyURI |
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14 # into a subclass |
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15 |
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16 def __init__(self, uri): |
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17 """ |
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18 Constructor. |
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19 |
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20 :param uri: URI string for the long namespace identifier. |
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21 """ |
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22 self._uri = six.text_type(uri) # Ensure this is a unicode string |
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23 |
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24 @property |
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25 def uri(self): |
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26 """Identifier's URI.""" |
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27 return self._uri |
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28 |
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29 def __str__(self): |
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30 return self._uri |
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31 |
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32 def __eq__(self, other): |
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33 return self.uri == other.uri if isinstance(other, Identifier) else False |
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34 |
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35 def __hash__(self): |
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36 return hash((self.uri, self.__class__)) |
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37 |
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38 def __repr__(self): |
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39 return '<%s: %s>' % (self.__class__.__name__, self._uri) |
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40 |
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41 def provn_representation(self): |
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42 """PROV-N representation of qualified name in a string.""" |
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43 return '"%s" %%%% xsd:anyURI' % self._uri |
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44 |
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45 |
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46 @six.python_2_unicode_compatible |
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47 class QualifiedName(Identifier): |
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48 """Qualified name of an identifier in a particular namespace.""" |
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49 |
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50 def __init__(self, namespace, localpart): |
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51 """ |
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52 Constructor. |
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53 |
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54 :param namespace: Namespace to use for qualified name resolution. |
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55 :param localpart: Portion of identifier not part of the namespace prefix. |
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56 """ |
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57 Identifier.__init__(self, u''.join([namespace.uri, localpart])) |
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58 self._namespace = namespace |
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59 self._localpart = localpart |
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60 self._str = ( |
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61 ':'.join([namespace.prefix, localpart]) |
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62 if namespace.prefix else localpart |
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63 ) |
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64 |
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65 @property |
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66 def namespace(self): |
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67 """Namespace of qualified name.""" |
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68 return self._namespace |
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69 |
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70 @property |
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71 def localpart(self): |
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72 """Local part of qualified name.""" |
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73 return self._localpart |
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74 |
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75 def __str__(self): |
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76 return self._str |
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77 |
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78 def __repr__(self): |
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79 return '<%s: %s>' % (self.__class__.__name__, self._str) |
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80 |
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81 def __hash__(self): |
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82 return hash(self.uri) |
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83 |
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84 def provn_representation(self): |
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85 """PROV-N representation of qualified name in a string.""" |
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86 return "'%s'" % self._str |
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87 |
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88 |
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89 class Namespace(object): |
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90 """PROV Namespace.""" |
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91 |
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92 def __init__(self, prefix, uri): |
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93 """ |
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94 Constructor. |
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95 |
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96 :param prefix: String short hand prefix for the namespace. |
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97 :param uri: URI string for the long namespace identifier. |
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98 """ |
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99 self._prefix = prefix |
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100 self._uri = uri |
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101 self._cache = dict() |
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102 |
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103 @property |
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104 def uri(self): |
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105 """Namespace URI.""" |
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106 return self._uri |
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107 |
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108 @property |
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109 def prefix(self): |
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110 """Namespace prefix.""" |
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111 return self._prefix |
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112 |
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113 def contains(self, identifier): |
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114 """ |
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115 Indicates whether the identifier provided is contained in this namespace. |
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116 |
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117 :param identifier: Identifier to check. |
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118 :return: bool |
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119 """ |
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120 uri = identifier if isinstance(identifier, six.string_types) else ( |
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121 identifier.uri if isinstance(identifier, Identifier) else None |
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122 ) |
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123 return uri.startswith(self._uri) if uri else False |
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124 |
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125 def qname(self, identifier): |
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126 """ |
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127 Returns the qualified name of the identifier given using the namespace |
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128 prefix. |
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129 |
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130 :param identifier: Identifier to resolve to a qualified name. |
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131 :return: :py:class:`QualifiedName` |
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132 """ |
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133 uri = identifier if isinstance(identifier, six.string_types) else ( |
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134 identifier.uri if isinstance(identifier, Identifier) else None |
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135 ) |
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136 if uri and uri.startswith(self._uri): |
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137 return QualifiedName(self, uri[len(self._uri):]) |
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138 else: |
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139 return None |
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140 |
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141 def __eq__(self, other): |
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142 return ( |
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143 (self._uri == other.uri and self._prefix == other.prefix) |
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144 if isinstance(other, Namespace) else False |
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145 ) |
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146 |
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147 def __ne__(self, other): |
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148 return ( |
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149 not isinstance(other, Namespace) or |
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150 self._uri != other.uri or |
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151 self._prefix != other.prefix |
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152 ) |
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153 |
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154 def __hash__(self): |
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155 return hash((self._uri, self._prefix)) |
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156 |
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157 def __repr__(self): |
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158 return '<%s: %s {%s}>' % ( |
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159 self.__class__.__name__, self._prefix, self._uri |
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160 ) |
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161 |
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162 def __getitem__(self, localpart): |
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163 if localpart in self._cache: |
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164 return self._cache[localpart] |
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165 else: |
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166 qname = QualifiedName(self, localpart) |
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167 self._cache[localpart] = qname |
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168 return qname |