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

Example 1 with Template

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

the class ParserSPARQL10 method parseTemplate.

public static Template parseTemplate(String string) {
    final Query query = new Query();
    Action action = new Action() {

        @Override
        public void exec(SPARQLParser10 parser) throws Exception {
            Template t = parser.ConstructTemplate();
            query.setConstructTemplate(t);
        }
    };
    perform(query, string, action);
    return query.getConstructTemplate();
}

Example 2 with Template

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

the class ConstructHandler method setVars.

@Override
public void setVars(Map<Var, Node> values) {
    if (values.isEmpty()) {
        return;
    }
    AbstractRewriter<Node> rw = new AbstractRewriter<Node>(values) {
    };
    query.setConstructTemplate(new Template(BasicPattern.wrap(rw.rewrite(constructs))));
}

Example 3 with Template

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

the class ConstructHandlerTest method testSetVars.

@Test
public void testSetVars() {
    Var v = Var.alloc("v");
    Triple t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), v);
    handler.addConstruct(t);
    Template template = query.getConstructTemplate();
    assertNotNull(template);
    List<Triple> lst = template.getTriples();
    assertEquals(1, lst.size());
    assertEquals(t, lst.get(0));
    Map<Var, Node> values = new HashMap<>();
    values.put(v, NodeFactory.createURI("three"));
    handler.setVars(values);
    template = query.getConstructTemplate();
    assertNotNull(template);
    lst = template.getTriples();
    assertEquals(1, lst.size());
    t = new Triple(NodeFactory.createURI("one"), NodeFactory.createURI("two"), NodeFactory.createURI("three"));
    assertEquals(t, lst.get(0));
}

Example 4 with Template

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

the class QueryExecutionBase method execConstructTriples.

@Override
public Iterator<Triple> execConstructTriples() {
    checkNotClosed();
    if (!query.isConstructType())
        throw new QueryExecException("Attempt to get a CONSTRUCT model from a " + labelForQuery(query) + " query");
    // This causes there to be no PROJECT around the pattern.
    // That in turn, exposes the initial bindings.  
    query.setQueryResultStar(true);
    startQueryIterator();
    Template template = query.getConstructTemplate();
    return TemplateLib.calcTriples(template.getTriples(), queryIterator);
}

Example 5 with Template

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

the class QueryExecutionBase method execConstructQuads.

@Override
public Iterator<Quad> execConstructQuads() {
    checkNotClosed();
    if (!query.isConstructType())
        throw new QueryExecException("Attempt to get a CONSTRUCT model from a " + labelForQuery(query) + " query");
    // This causes there to be no PROJECT around the pattern.
    // That in turn, exposes the initial bindings.  
    query.setQueryResultStar(true);
    startQueryIterator();
    Template template = query.getConstructTemplate();
    return TemplateLib.calcQuads(template.getQuads(), queryIterator);
}