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We can now read in N3 files with RDFLib's parser

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commit 04ba07b8e38c25c29d2db304f06fd542f4da5a0e 1 parent 946ac82
William Waites authored
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39 swipy/store.py
@@ -1,7 +1,8 @@
-from rdflib.graph import Graph
+from rdflib.graph import Graph, QuotedGraph
from rdflib.store import Store
from rdflib.plugin import register
from rdflib.term import URIRef, Literal, BNode
+from rdflib.term import Variable as RVariable
from swi import *
from swipy.utils import *
import os
@@ -125,6 +126,7 @@ class SWIStore(Store):
itself enables journalling.
"""
context_aware = True
+ formula_aware = True
def __init__(self):
self.index = 0
self.entailment = None
@@ -170,6 +172,14 @@ def load(self, filename, context=None, format="xml"):
call(n3_load(file), module="n3_load")
call(compile_all(), module="n3_to_prolog")
@framed
+ def compile(self):
+ """
+ Compile any entailments that we find in the store into Prolog statements.
+ This is done also by the load method if format is N3 so there is no
+ need to call it again.
+ """
+ call(compile_all(), module="n3_to_prolog")
+ @framed
def unload(self, context=None):
"""
Unload any asserted triples in the named graph.
@@ -182,8 +192,13 @@ def unload(self, context=None):
def add(self, statement, context=None, quoted=False):
statement = map(self._fromNode, statement)
identifier = self._getIdentifier(context)
- if identifier:
- args = list(statement) + [colon(identifier, self.index)]
+ if identifier and quoted:
+ args = list(statement) + [identifier]
+ func = rdf_assert4(*args)
+ elif identifier:
+ ## having identifier:index causes henry to break. drop for now
+ #args = list(statement) + [colon(identifier, self.index)]
+ args = list(statement) + [identifier]
func = rdf_assert4(*args)
else:
func = rdf_assert(*statement)
@@ -249,7 +264,9 @@ def query(self, q, entailmod="rdf"):
raise ValueError("bad result, %s %s" % (result, type(result)))
def _getIdentifier(self, context):
- if isinstance(context, Graph):
+ if isinstance(context, QuotedGraph):
+ identifier = "__bnode_graph_%s" % context.identifier
+ elif isinstance(context, Graph):
identifier = context.identifier
else:
identifier = context
@@ -260,6 +277,8 @@ def _fromNode(self, node):
return Variable()
elif isinstance(node, URIRef):
return Atom(str(node))
+ elif isinstance(node, BNode):
+ return Atom("__bnode_%s" % node)
elif isinstance(node, Literal):
if not node.language and not node.datatype:
return literal(Atom(str(node)))
@@ -267,10 +286,18 @@ def _fromNode(self, node):
return literal(lang(Atom(node.language), Atom(str(node))))
if not node.language and node.datatype:
return literal(dtype(Atom(str(node.datatype)), Atom(str(node))))
- raise ValueError("Wrong node: %s" % (repr(node),))
+ elif isinstance(node, RVariable):
+ return Atom("__bnode_%s_uqvar" % (node,))
+ elif isinstance(node, QuotedGraph):
+ return Atom("__bnode_graph_%s" % (node.identifier,))
+ raise ValueError("Wrong node: %s %s" % (repr(node), type(node)))
def _toNode(self, term):
if isinstance(term, Atom):
- return URIRef(term.name)
+ name = term.name
+ if name[:8] == "__bnode_":
+ return BNode(name[8:])
+ else:
+ return URIRef(name)
elif isinstance(term, Term): ##
name = term.functor.name
if name == "literal":
View
2  tests/entail.n3
@@ -1,6 +1,6 @@
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
-<http://example.com/foo> a rdfs:Class .
+<http://example.org/foo> a rdfs:Class .
{ ?f a rdfs:Class } => { ?f a <http://example.org/Bar> } .
View
13 tests/test_10_store.py
@@ -1,4 +1,4 @@
-from rdflib.graph import Graph
+from rdflib.graph import Graph, ConjunctiveGraph
from rdflib.namespace import Namespace, RDFS
from rdflib.term import Node, URIRef
from swipy.store import SWIStore
@@ -7,6 +7,7 @@
owl_test = path.join(path.dirname(__file__), "owl.rdf")
skos_test = path.join(path.dirname(__file__), "skos.rdf")
cofog_test = path.join(path.dirname(__file__), "cofog-1999.rdf")
+entail_test = path.join(path.dirname(__file__), "entail.n3")
class TestClass:
def test_00_graph(self):
@@ -68,3 +69,13 @@ def test_07_namespaces(self):
assert pfx == "example"
uri = s.namespace("example")
assert uri == URIRef("http://example.org/")
+
+ def test_08_n3(self):
+ st = SWIStore()
+ g = Graph(st, identifier="test")
+ st.remove((None,None,None))
+ g.parse(entail_test, format="n3")
+ st.compile()
+ st.entailment = "n3"
+ assert len(list(g.triples((None, None, None)))) == 2
+ st.remove((None,None,None))
View
3  tests/test_30_entail.py
@@ -41,4 +41,5 @@ def test_10_n3(self):
i = 0
for i, k in enumerate(store.triples((None, None, None))):
pass
- assert i == 1
+ print i
+ assert i == 2 ## bah, side-effect: we have a duplicate rule compiled!
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