PathNavigator.java

/**
 * Copyright 2015 Santhosh Kumar Tekuri
 *
 * The JLibs authors license 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 jlibs.core.graph.navigators;

import jlibs.core.graph.Sequence;
import jlibs.core.graph.sequences.PathSequence;
import jlibs.core.graph.Navigator;
import jlibs.core.graph.Path;

/**
 * @author Santhosh Kumar T
 */
public class PathNavigator<E> implements Navigator<Path>{
    private Navigator<E> delegate;

    public PathNavigator(Navigator<E> delegate){
        this.delegate = delegate;
    }

    @Override
    public Sequence<Path> children(Path path){
        @SuppressWarnings({"unchecked"})
        Sequence<? extends E> seq = delegate.children((E)path.getElement());
        return new PathSequence<E>(path, seq);
    }
}