Examples with SelectBuilder org.apache.jena.arq.querybuilder.SelectBuilder used on opensource projects

Example 21 with SelectBuilder

use of org.apache.jena.arq.querybuilder.SelectBuilder in project jena by apache.

the class WhereClauseTest method testAddUnion.

@ContractTest
public void testAddUnion() {
    SelectBuilder sb = new SelectBuilder();
    sb.addPrefix("pfx", "uri").addVar("?x").addWhere("<one>", "<two>", "three");
    WhereClause<?> whereClause = getProducer().newInstance();
    whereClause.getWhereHandler().addWhere(new TriplePath(Triple.ANY));
    AbstractQueryBuilder<?> builder = whereClause.addUnion(sb);
    ElementUnion union = new ElementUnion();
    ElementPathBlock epb = new ElementPathBlock();
    union.addElement(epb);
    epb.addTriple(Triple.ANY);
    Query subQuery = new Query();
    ElementSubQuery esq = new ElementSubQuery(subQuery);
    union.addElement(esq);
    epb = new ElementPathBlock();
    subQuery.setQuerySelectType();
    subQuery.addProjectVars(Arrays.asList("x"));
    subQuery.setQueryPattern(epb);
    Triple t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createLiteral("three"));
    epb.addTriple(t);
    WhereValidator visitor = new WhereValidator(union);
    Query result = builder.build();
    result.getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
    assertEquals("uri", result.getPrefixMapping().getNsPrefixURI("pfx"));
}

Example 22 with SelectBuilder

use of org.apache.jena.arq.querybuilder.SelectBuilder in project jena by apache.

the class WhereClauseTest method testSetVarsInSubQuery.

@ContractTest
public void testSetVarsInSubQuery() {
    Var v = Var.alloc("v");
    SelectBuilder sb = new SelectBuilder();
    sb.addPrefix("pfx", "uri").addWhere("<one>", "<two>", v);
    WhereClause<?> whereClause = getProducer().newInstance();
    AbstractQueryBuilder<?> builder = whereClause.addSubQuery(sb);
    Query subQuery = new Query();
    subQuery.setQuerySelectType();
    subQuery.setQueryResultStar(true);
    ElementSubQuery esq = new ElementSubQuery(subQuery);
    ElementPathBlock epb = new ElementPathBlock();
    subQuery.setQueryPattern(epb);
    Triple t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createVariable("v"));
    epb.addTriple(t);
    WhereValidator visitor = new WhereValidator(esq);
    Query result = builder.build();
    result.getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
    builder.setVar(v, NodeFactory.createURI("three"));
    subQuery = new Query();
    subQuery.setQuerySelectType();
    subQuery.setQueryResultStar(true);
    esq = new ElementSubQuery(subQuery);
    epb = new ElementPathBlock();
    subQuery.setQueryPattern(epb);
    t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createURI("three"));
    epb.addTriple(t);
    visitor = new WhereValidator(esq);
    result = builder.build();
    result.getQueryPattern().visit(visitor);
    assertTrue(visitor.matching);
}