Examples with NodeTupleWritable org.apache.jena.hadoop.rdf.types.NodeTupleWritable used on opensource projects

Example 1 with NodeTupleWritable

use of org.apache.jena.hadoop.rdf.types.NodeTupleWritable in project jena by apache.

the class RdfTypesTest method tuple_writable_01.

/**
     * Basic tuple writable round tripping test
     * 
     * @throws IOException
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws ClassNotFoundException
     */
@Test
public void tuple_writable_01() throws IOException, InstantiationException, IllegalAccessException, ClassNotFoundException {
    Tuple<Node> t = tuple(NodeFactory.createURI("http://one"), NodeFactory.createURI("http://two"), NodeFactory.createLiteral("value"), NodeFactory.createLiteral("foo"), NodeFactory.createURI("http://three"));
    NodeTupleWritable tw = new NodeTupleWritable(t);
    testWriteRead(tw, tw);
}

Example 2 with NodeTupleWritable

use of org.apache.jena.hadoop.rdf.types.NodeTupleWritable in project jena by apache.

the class AbstractNodeWriter method writeValue.

/**
     * Writes the given value
     * <p>
     * If the value is one of the RDF primitives - {@link NodeWritable},
     * {@link TripleWritable}, {@link QuadWritable} and
     * {@link NodeTupleWritable} - then it is formatted as a series of nodes
     * separated by the separator. Otherwise it is formatted by simply calling
     * {@code toString()} on it.
     * </p>
     * 
     * @param value
     *            Values
     */
protected void writeValue(TValue value) {
    // Handle null specially
    if (value instanceof NullWritable || value == null)
        return;
    // Handle RDF primitives specially and format them as proper nodes
    if (value instanceof NodeWritable) {
        this.writeKey((NodeWritable) value);
    } else if (value instanceof TripleWritable) {
        Triple t = ((TripleWritable) value).get();
        this.writeNodes(t.getSubject(), t.getPredicate(), t.getObject());
    } else if (value instanceof QuadWritable) {
        Quad q = ((QuadWritable) value).get();
        this.writeNodes(q.getGraph(), q.getSubject(), q.getPredicate(), q.getObject());
    } else if (value instanceof NodeTupleWritable) {
        Tuple<Node> tuple = ((NodeTupleWritable) value).get();
        Node[] n = new Node[tuple.len()];
        tuple.copyInto(n);
        this.writeNodes(n);
    } else {
        // For arbitrary values just toString() them
        this.writer.write(value.toString());
    }
}