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annotate planemo/lib/python3.7/site-packages/rdflib/plugins/serializers/nquads.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 import warnings
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2
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3 from rdflib.term import Literal
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4 from rdflib.serializer import Serializer
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5 from rdflib.py3compat import b
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6
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7 from rdflib.plugins.serializers.nt import _quoteLiteral
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8
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9 __all__ = ['NQuadsSerializer']
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11
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12 class NQuadsSerializer(Serializer):
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13
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14 def __init__(self, store):
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15 if not store.context_aware:
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16 raise Exception(
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17 "NQuads serialization only makes "
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18 "sense for context-aware stores!")
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19
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20 super(NQuadsSerializer, self).__init__(store)
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21
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22 def serialize(self, stream, base=None, encoding=None, **args):
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23 if base is not None:
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24 warnings.warn("NQuadsSerializer does not support base.")
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25 if encoding is not None:
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26 warnings.warn("NQuadsSerializer does not use custom encoding.")
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27 encoding = self.encoding
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28 for context in self.store.contexts():
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29 for triple in context:
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30 stream.write(_nq_row(
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31 triple, context.identifier).encode(encoding, "replace"))
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32 stream.write(b("\n"))
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33
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34
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35 def _nq_row(triple, context):
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36 if isinstance(triple[2], Literal):
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37 return "%s %s %s %s .\n" % (triple[0].n3(),
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38 triple[1].n3(),
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39 _quoteLiteral(triple[2]),
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40 context.n3())
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41 else:
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42 return "%s %s %s %s .\n" % (triple[0].n3(),
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43 triple[1].n3(),
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44 triple[2].n3(),
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45 context.n3())