PathExistenceVisitor.java

/**
 * Copyright (C) 2012 Red Hat, Inc. (jdcasey@commonjava.org)
 *
 * Licensed 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.commonjava.cartographer.graph.spi.neo4j.traverse;

import org.commonjava.cartographer.graph.model.GraphPathInfo;
import org.commonjava.cartographer.graph.spi.neo4j.model.Neo4jGraphPath;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Path;
import org.neo4j.graphdb.Relationship;

public class PathExistenceVisitor
    extends AbstractTraverseVisitor
{

    private final Node end;

    private boolean found = false;

    public PathExistenceVisitor( final Node end )
    {
        this.end = end;
    }

    public boolean isFound()
    {
        return found;
    }

    @Override
    public boolean isEnabledFor( final Path path )
    {
        return !found;
    }

    @Override
    public void includingChild( final Relationship child, final Neo4jGraphPath childPath,
                                final GraphPathInfo childPathInfo, final Path parentPath )
    {
        final Node end = child.getEndNode();
        if ( this.end.getId() == end.getId() )
        {
            found = true;
        }
    }

}