Examples with Quad org.apache.jena.sparql.core.Quad used on opensource projects

Example 46 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class OpQuad method equivalent.

public boolean equivalent(OpQuadPattern opQuads) {
    QuadPattern quads = opQuads.getPattern();
    if (quads.size() != 1)
        return false;
    Quad q = quads.get(0);
    return quad.equals(q);
}

Example 47 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class OpQuadBlock method convertOp.

/** Convenience - convert to OpQuadPatterns which are more widely used (currently?) */
public Op convertOp() {
    if (quads.size() == 0)
        return OpTable.empty();
    if (quads.size() == 1) {
        Quad q = quads.get(0);
        BasicPattern bgp = new BasicPattern();
        bgp.add(q.asTriple());
        return new OpQuadPattern(q.getGraph(), bgp);
    }
    List<OpQuadPattern> x = convert();
    OpSequence ops = OpSequence.create();
    for (OpQuadPattern oqp : x) ops.add(oqp);
    return ops;
}

Example 48 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class RdfTypesTest method quad_writable_02.

/**
     * Basic quad writable round tripping test
     * 
     * @throws IOException
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws ClassNotFoundException
     */
@Test
public void quad_writable_02() throws IOException, InstantiationException, IllegalAccessException, ClassNotFoundException {
    Quad q = new Quad(Quad.defaultGraphNodeGenerated, NodeFactory.createBlankNode(), NodeFactory.createURI("http://predicate"), NodeFactory.createLiteral("value"));
    QuadWritable qw = new QuadWritable(q);
    testWriteRead(qw, qw);
}

Example 49 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class QuadWritable method write.

@Override
public void write(DataOutput output) throws IOException {
    if (this.get() == null)
        throw new IOException("Null quads cannot be written using this class, consider using NodeTupleWritable instead");
    // May not have yet prepared the Thrift triple
    if (!this.quad.isSetS()) {
        Quad tuple = this.get();
        this.quad.setG(ThriftConvert.convert(tuple.getGraph(), false));
        this.quad.setS(ThriftConvert.convert(tuple.getSubject(), false));
        this.quad.setP(ThriftConvert.convert(tuple.getPredicate(), false));
        this.quad.setO(ThriftConvert.convert(tuple.getObject(), false));
    }
    byte[] buffer;
    try {
        buffer = ThriftConverter.toBytes(this.quad);
    } catch (TException e) {
        throw new IOException(e);
    }
    output.writeInt(buffer.length);
    output.write(buffer);
}

Example 50 with Quad

use of org.apache.jena.sparql.core.Quad in project jena by apache.

the class RdfTypesTest method quad_writable_01.

/**
     * Basic quad writable round tripping test
     * 
     * @throws IOException
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws ClassNotFoundException
     */
@Test
public void quad_writable_01() throws IOException, InstantiationException, IllegalAccessException, ClassNotFoundException {
    Quad q = new Quad(Quad.defaultGraphNodeGenerated, NodeFactory.createURI("http://example"), NodeFactory.createURI("http://predicate"), NodeFactory.createLiteral("value"));
    QuadWritable qw = new QuadWritable(q);
    testWriteRead(qw, qw);
}