Java Code Examples for org.apache.jena.graph.Triple#getPredicate()

The following examples show how to use org.apache.jena.graph.Triple#getPredicate() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: Node_TripleStarPattern.java From RDFstarTools with Apache License 2.0

6 votes

static public Triple asTripleWithNode_TripleStarPatterns( Triple t )
{
	final Node s = t.getSubject();
	final Node s2;
	if ( s instanceof Node_Triple )
		s2 = asNode_TripleStarPattern( (Node_Triple) s );
	else
		s2 = s;

	final Node o = t.getObject();
	final Node o2;
	if ( o instanceof Node_Triple )
		o2 = asNode_TripleStarPattern( (Node_Triple) o );
	else
		o2 = o;

	if ( s == s2 && o == o2 )
		return t;
	else
		return new Triple(s2, t.getPredicate(), o2);
}

Example 2

Source File: TraversalBuilder.java From sparql-gremlin with Apache License 2.0

6 votes

public static GraphTraversal<?, ?> transform(final Triple triple) {
    final GraphTraversal<Vertex, ?> matchTraversal = __.as(triple.getSubject().getName());
    final Node predicate = triple.getPredicate();
    final String uri = predicate.getURI();
    final String uriValue = Prefixes.getURIValue(uri);
    final String prefix = Prefixes.getPrefix(uri);
    switch (prefix) {
        case "edge":
            return matchTraversal.out(uriValue).as(triple.getObject().getName());
        case "property":
            return matchProperty(matchTraversal, uriValue, PropertyType.PROPERTY, triple.getObject());
        case "value":
            return matchProperty(matchTraversal, uriValue, PropertyType.VALUE, triple.getObject());
        default:
            throw new IllegalStateException(String.format("Unexpected predicate: %s", predicate));
    }
}

Example 3

Source File: TraversalBuilder.java From tinkerpop with Apache License 2.0

6 votes

static GraphTraversal<?, ?> transform(final Triple triple) {
    final GraphTraversal<Vertex, ?> matchTraversal = __.as(triple.getSubject().getName());
    
    final Node predicate = triple.getPredicate();
    final String uri = predicate.getURI();
    final String uriValue = Prefixes.getURIValue(uri);
    final String prefix = Prefixes.getPrefix(uri);

    switch (prefix) {
        case "edge":
            return matchTraversal.out(uriValue).as(triple.getObject().getName());
        case "property":
            return matchProperty(matchTraversal, uriValue, PropertyType.PROPERTY, triple.getObject());
        case "value":
            return matchProperty(matchTraversal, uriValue, PropertyType.VALUE, triple.getObject());
        default:
            throw new IllegalStateException(String.format("Unexpected predicate: %s", predicate));
    }
}

Example 4

Source File: OWLQLCompiler.java From quetzal with Eclipse Public License 2.0

6 votes

protected String getKey(Triple t) {
	Node subj = t.getSubject();
	Node obj = t.getObject();
	Node pred = t.getPredicate();
	if (!pred.isURI()) {
		return null;
	}
	if (!subj.isVariable() && !obj.isVariable()) {
		return null;
	}
	if (pred.getURI().equals(RDFConstants.RDF_TYPE)) {
		return obj.isURI()? obj.getURI() : null;
	} else {
		return pred.getURI();
	}
	
}

Example 5

Source File: ElementTransformSPARQLStar.java From RDFstarTools with Apache License 2.0

5 votes

protected void unNestBindClause( Triple tp, ElementPathBlock epb, Var var )
{
	Node s = tp.getSubject();
	Node p = tp.getPredicate();
	Node o = tp.getObject();

	if ( s instanceof Node_Triple )
	{
		final Triple sTP = ( (Node_Triple) s ).get();
		s = unNestTriplePattern(sTP, epb, true);
	}

	if ( o instanceof Node_Triple )
	{
		final Triple oTP = ( (Node_Triple) o ).get();
		o = unNestTriplePattern(oTP, epb, true);
	}

	final Triple nonnestedTP = new Triple(s, p, o);

	if ( ! doneNested.containsKey(nonnestedTP) )
	{
		epb.addTriple(nonnestedTP);
		epb.addTriple( new Triple(var, RDF.Nodes.type,      RDF.Nodes.Statement) );
		epb.addTriple( new Triple(var, RDF.Nodes.subject,   s) );
		epb.addTriple( new Triple(var, RDF.Nodes.predicate, p) );
		epb.addTriple( new Triple(var, RDF.Nodes.object,    o) );
		doneNested.put(nonnestedTP, var);
	}
}

Example 6

Source File: SinkTripleStarOutput.java From RDFstarTools with Apache License 2.0

5 votes

@Override
public void send(Triple triple) {
    Node s = triple.getSubject() ;
    Node p = triple.getPredicate() ;
    Node o = triple.getObject() ;

    nodeFmt.format(writer, s) ;
    writer.print(" ") ;
    nodeFmt.format(writer, p) ;
    writer.print(" ") ;
    nodeFmt.format(writer, o) ;
    writer.print(" .\n") ;
}

Example 7

Source File: NormalizedOWLQLTbox.java From quetzal with Eclipse Public License 2.0

5 votes

protected boolean isTripleAbsentFromAbox(Triple qt) {
	Node pred = qt.getPredicate();
	if (pred.isURI() && isGeneratedRole(pred.getURI())) {
		return true;
	} else if (pred.isURI() && pred.getURI().equals(RDFConstants.RDF_TYPE)) {
		Node obj = qt.getObject();
		if (obj.isURI() && isGeneratedClass(obj.getURI())) {
			return true;
		}
	}
	return false;
}

Example 8

Source File: ElementTransformSPARQLStar.java From RDFstarTools with Apache License 2.0

4 votes

protected Node unNestTriplePattern( Triple tp, ElementPathBlock epb, boolean hasParent )
{	
	Node s = tp.getSubject();
	Node p = tp.getPredicate();
	Node o = tp.getObject();

	if ( s instanceof Node_Triple )
	{
		final Triple sTP = ( (Node_Triple) s ).get();
		s = unNestTriplePattern(sTP, epb, true);
	}

	if ( o instanceof Node_Triple )
	{
		final Triple oTP = ( (Node_Triple) o ).get();
		o = unNestTriplePattern(oTP, epb, true);
	}

	final Triple nonnestedTP = new Triple(s, p, o);
	final boolean seenBefore = doneNested.containsKey(nonnestedTP);

	final Node var;
	if ( seenBefore ) {
		var = doneNested.get(nonnestedTP);
	}
	else
	{
		var = createFreshAnonVarForReifiedTriple();
		epb.addTriple(nonnestedTP);

		if ( hasParent ) {
			epb.addTriple( new Triple(var, RDF.Nodes.type,      RDF.Nodes.Statement) );
			epb.addTriple( new Triple(var, RDF.Nodes.subject,   s) );
			epb.addTriple( new Triple(var, RDF.Nodes.predicate, p) );
			epb.addTriple( new Triple(var, RDF.Nodes.object,    o) );
			doneNested.put(nonnestedTP, var);
		}
	}

	return var;
}

Example 9