Examples with ElementOptional org.apache.jena.sparql.syntax.ElementOptional used on opensource projects

Example 1 with ElementOptional

use of org.apache.jena.sparql.syntax.ElementOptional in project jena by apache.

the class WhereHandler method addOptional.

/**
 * Add an optional triple to the where clause
 *
 * @param t The triple path to add.
 * @throws IllegalArgumentException If the triple is not a valid triple for a
 * where clause.
 */
public void addOptional(TriplePath t) throws IllegalArgumentException {
    testTriple(t);
    ElementPathBlock epb = new ElementPathBlock();
    epb.addTriple(t);
    ElementOptional opt = new ElementOptional(epb);
    getClause().addElement(opt);
}

Example 2 with ElementOptional

use of org.apache.jena.sparql.syntax.ElementOptional in project jena by apache.

the class WhereHandlerTest method testAddOptionalAnonymous.

@Test
public void testAddOptionalAnonymous() {
    handler.addOptional(new TriplePath(new Triple(Node.ANY, RDF.first.asNode(), Node.ANY)));
    handler.build();
    TriplePath tp = new TriplePath(new Triple(Node.ANY, RDF.first.asNode(), Node.ANY));
    ElementPathBlock epb = new ElementPathBlock();
    epb.addTriple(tp);
    ElementOptional opt = new ElementOptional(epb);
    WhereValidator wv = new WhereValidator(opt);
    query.getQueryPattern().visit(wv);
    assertTrue(wv.matching);
}

Example 3 with ElementOptional

use of org.apache.jena.sparql.syntax.ElementOptional in project jena by apache.

the class WhereClauseTest method testAddOptionalGroupPattern_VariableNode.

@ContractTest
public void testAddOptionalGroupPattern_VariableNode() {
    Node s = NodeFactory.createVariable("s");
    Node q = NodeFactory.createURI("urn:q");
    Node v = NodeFactory.createURI("urn:v");
    Var x = Var.alloc("x");
    Node n123 = NodeFactory.createLiteral(LiteralLabelFactory.createTypedLiteral(123));
    SelectBuilder pattern = new SelectBuilder();
    pattern.addWhere(new Triple(s, q, n123));
    pattern.addWhere(new Triple(s, v, x));
    WhereClause<?> whereClause = getProducer().newInstance();
    AbstractQueryBuilder<?> builder = whereClause.addOptional(pattern);
    ElementPathBlock epb = new ElementPathBlock();
    ElementOptional optional = new ElementOptional(epb);
    TriplePath tp = new TriplePath(new Triple(Var.alloc(s), q, n123));
    epb.addTriplePath(tp);
    tp = new TriplePath(new Triple(Var.alloc(s), v, x));
    epb.addTriplePath(tp);
    WhereValidator visitor = new WhereValidator(optional);
    builder.build().getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
}

Example 4 with ElementOptional

use of org.apache.jena.sparql.syntax.ElementOptional in project jena by apache.

the class WhereClauseTest method testAddOptionalObjectsWithPath.

@ContractTest
public void testAddOptionalObjectsWithPath() {
    WhereClause<?> whereClause = getProducer().newInstance();
    PrefixMapping pmap = new PrefixMappingImpl();
    pmap.setNsPrefix("ts", "urn:test:");
    Path path = PathParser.parse("ts:two/ts:dos", pmap);
    AbstractQueryBuilder<?> builder = whereClause.addOptional(NodeFactory.createURI("one"), path, NodeFactory.createURI("three"));
    ElementPathBlock epb = new ElementPathBlock();
    ElementOptional optional = new ElementOptional(epb);
    TriplePath tp = new TriplePath(NodeFactory.createURI("one"), path, NodeFactory.createURI("three"));
    epb.addTriplePath(tp);
    WhereValidator visitor = new WhereValidator(optional);
    builder.build().getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
}

Example 5 with ElementOptional

use of org.apache.jena.sparql.syntax.ElementOptional in project jena by apache.

the class WhereClauseTest method testAddOptionalTriple.

@ContractTest
public void testAddOptionalTriple() {
    WhereClause<?> whereClause = getProducer().newInstance();
    AbstractQueryBuilder<?> builder = whereClause.addOptional(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createURI("three"));
    ElementPathBlock epb = new ElementPathBlock();
    ElementOptional optional = new ElementOptional(epb);
    Triple t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createURI("three"));
    epb.addTriple(t);
    WhereValidator visitor = new WhereValidator(optional);
    builder.build().getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
}