Java Code Examples for com.hp.hpl.jena.sparql.core.Var#alloc()
The following examples show how to use
com.hp.hpl.jena.sparql.core.Var#alloc() .
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Example 1
Source File: IsLiteralTestEvaluator.java From anno4j with Apache License 2.0 | 6 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { TestingSelector testingSelector = (TestingSelector) nodeSelector; FunctionTest functionTest = (FunctionTest) testingSelector.getTest(); if(functionTest.getArgSelectors().get(0) instanceof PropertySelector) { PropertySelector arg = (PropertySelector) functionTest.getArgSelectors().get(0); PropertySelector delegate = (PropertySelector) testingSelector.getDelegate(); Var target = Var.alloc(VarIDGenerator.createID()); elementGroup.addTriplePattern(new Triple(var.asNode(), NodeFactory.createURI(delegate.getProperty().toString()), target)); Var selector = Var.alloc(VarIDGenerator.createID()); elementGroup.addTriplePattern(new Triple(target.asNode(), NodeFactory.createURI(arg.getProperty().toString()), selector.asNode())); elementGroup.addElementFilter(new ElementFilter(new E_IsLiteral(new ExprVar(selector)))); return selector; } else { throw new IllegalStateException("Argument of function isLiteral has to be a PropertySelector"); } }
Example 2
Source File: IsATestEvaluator.java From anno4j with Apache License 2.0 | 5 votes |
@Override public Expr evaluate(NodeTest nodeTest, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { IsATest isATest = (IsATest) nodeTest; Var tmpVar = Var.alloc(Var.alloc(VarIDGenerator.createID())); elementGroup.addTriplePattern(new Triple(var.asNode(), RDF.type.asNode(), tmpVar.asNode())); return new E_Equals(new ExprVar(tmpVar.asNode()), new NodeValueNode(NodeFactory.createURI(isATest.getPathExpression(new SesameValueBackend()).replace("<", "").replace(">", "").replaceFirst("is-a ", "")))); }
Example 3
Source File: PropertySelectorEvaluator.java From anno4j with Apache License 2.0 | 5 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { PropertySelector propertySelector = (PropertySelector) nodeSelector; if (propertySelector instanceof WildcardSelector) { throw new IllegalStateException(propertySelector.getClass() + " is not supported."); } Var id = Var.alloc(VarIDGenerator.createID()); elementGroup.addTriplePattern(new Triple(var.asNode(), NodeFactory.createURI(propertySelector.getProperty().toString()), id.asNode())); return id; }
Example 4
Source File: ReversePropertySelectorEvaluator.java From anno4j with Apache License 2.0 | 5 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { ReversePropertySelector reversePropertySelector = (ReversePropertySelector) nodeSelector; Var id = Var.alloc(VarIDGenerator.createID()); ElementPathBlock epb = new ElementPathBlock(); epb.addTriple(new TriplePath(var.asNode(), new P_Inverse(new P_Link(NodeFactory.createURI(reversePropertySelector.getProperty().toString()))), id.asNode())); ElementGroup group = new ElementGroup(); group.addElement(epb); elementGroup.addElement(group); return id; }
Example 5
Source File: RecursivePathSelectorEvaluator.java From anno4j with Apache License 2.0 | 5 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { RecursivePathSelector recursivePathSelector = (RecursivePathSelector) nodeSelector; Var id = Var.alloc(VarIDGenerator.createID()); ElementPathBlock epb = new ElementPathBlock(); String pathExpression = recursivePathSelector.getPathExpression(new SesameValueBackend()); /** * initial pathExpression contains: * (<http://www.w3.org/ns/oa#hasBody> / <http://www.example.com/schema#recursiveBodyValue>)* * * Because P_ZeroOrMore and so one, creates the same expression we have to strip the redundant chars. */ String strippedPathExpression = pathExpression.substring(2, pathExpression.length() -3 ); TriplePath triplePath = null; if (pathExpression.contains("*")) { triplePath = new TriplePath(var.asNode(), new P_ZeroOrMore1(new P_Link(NodeFactory.createURI(strippedPathExpression))), id.asNode()); } else if (pathExpression.contains("+")) { triplePath = new TriplePath(var.asNode(), new P_OneOrMore1(new P_Link(NodeFactory.createURI(strippedPathExpression))), id.asNode()); } else { throw new IllegalStateException("Only ZeroOrMorePath(*), OneOrMorePath(+) path selectors are currently supported."); } epb.addTriple(triplePath); ElementGroup group = new ElementGroup(); group.addElement(epb); elementGroup.addElement(group); return id; }
Example 6
Source File: UnionSelectorEvaluator.java From anno4j with Apache License 2.0 | 5 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { UnionSelector unionSelector = (UnionSelector) nodeSelector; NodeSelector nodeSelectorLeft = unionSelector.getLeft(); NodeSelector nodeSelectorRight = unionSelector.getRight(); ElementGroup leftGroup = new ElementGroup(); ElementGroup rightGroup = new ElementGroup(); Var leftVar = LDPathEvaluator.evaluate(nodeSelectorLeft, leftGroup, var, evaluatorConfiguration); Var rightVar = LDPathEvaluator.evaluate(nodeSelectorRight, rightGroup, var, evaluatorConfiguration); Var subVar = Var.alloc(VarIDGenerator.createID()); Query leftSubQuery = new Query(); leftGroup.addElement(new ElementBind(subVar, new NodeValueNode(leftVar.asNode()))); leftSubQuery.setQueryPattern(leftGroup); leftSubQuery.addResultVar(var); leftSubQuery.addResultVar(subVar); leftSubQuery.setQuerySelectType(); ElementSubQuery leftESubQuery = new ElementSubQuery(leftSubQuery); Query rightSubQuery = new Query(); rightGroup.addElement(new ElementBind(subVar, new NodeValueNode(rightVar.asNode()))); rightSubQuery.setQueryPattern(rightGroup); rightSubQuery.addResultVar(var); rightSubQuery.addResultVar(subVar); rightSubQuery.setQuerySelectType(); ElementSubQuery rightESubQuery = new ElementSubQuery(rightSubQuery); ElementUnion elementUnion = new ElementUnion(); elementUnion.addElement(leftESubQuery); elementUnion.addElement(rightESubQuery); elementGroup.addElement(elementUnion); return subVar; }
Example 7
Source File: EvalQuery.java From anno4j with Apache License 2.0 | 5 votes |
public static <T extends ResourceObject> Query evaluate(QueryServiceConfiguration queryServiceDTO, URI rootType) throws ParseException { Query query = QueryFactory.make(); query.setQuerySelectType(); ElementGroup elementGroup = new ElementGroup(); Var objectVar = Var.alloc("root"); // Creating and adding the first triple - could be something like: "?objectVar rdf:type oa:Annotation Triple t1 = new Triple(objectVar, RDF.type.asNode(), NodeFactory.createURI(rootType.toString())); elementGroup.addTriplePattern(t1); // Evaluating the criteria for (Criteria c : queryServiceDTO.getCriteria()) { SesameValueBackend backend = new SesameValueBackend(); LdPathParser parser = new LdPathParser(backend, queryServiceDTO.getConfiguration(), new StringReader(c.getLdpath())); Var var = LDPathEvaluator.evaluate(parser.parseSelector(queryServiceDTO.getPrefixes()), elementGroup, objectVar, queryServiceDTO.getEvaluatorConfiguration()); if (c.getConstraint() != null) { String resolvedConstraint = resolveConstraintPrefix(c.getConstraint(), queryServiceDTO, parser); EvalComparison.evaluate(elementGroup, c, var, resolvedConstraint); } } // Adding all generated patterns to the query object query.setQueryPattern(elementGroup); // Choose what we want so select - SELECT ?annotation in this case query.addResultVar(objectVar); // Setting the default prefixes, like rdf: or dc: query.getPrefixMapping().setNsPrefixes(queryServiceDTO.getPrefixes()); return query; }
Example 8
Source File: D2RQQueryHandler.java From GeoTriples with Apache License 2.0 | 5 votes |
public Domain map1(Binding binding) { Domain d = new Domain(variables.length); for (int i = 0; i < variables.length; i++) { Var v = Var.alloc(variables[i]); Node value = binding.get(v); int index = ((Integer) indexes.get(v)).intValue(); d.setElement(index, value); } return d; }
Example 9
Source File: SelfSelectionEvaluator.java From anno4j with Apache License 2.0 | 4 votes |
@Override public Var evaluate(NodeSelector nodeSelector, ElementGroup elementGroup, Var var, LDPathEvaluatorConfiguration evaluatorConfiguration) { return Var.alloc("root"); }