DatasetGraphViewGraphs.java example

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.sparql.core;

import org.apache.jena.graph.Graph ;
import org.apache.jena.graph.Node ;

/** Wrap a DatasetGraph with implementations of
 * {@link DatasetGraph#getDefaultGraph} and
 * {@link DatasetGraph#getGraph}
 * that use the view graph mechanism.
 * 
 * @see GraphView
 */

public class DatasetGraphViewGraphs extends DatasetGraphWrapper
{
    // May integrate into DatasetGraph hierarchy into DatasetGraphBase.

    public DatasetGraphViewGraphs(DatasetGraph dsg) {
        super(dsg) ;
    }

    @Override
    public Graph getDefaultGraph()
    { return GraphView.createDefaultGraph(getWrapped()) ; }

    @Override
    public Graph getGraph(Node graphNode)
    { return GraphView.createNamedGraph(getWrapped(), graphNode) ; }
}