org.apache.cayenne.ashwood.graph.ReversedIteration Maven / Gradle / Ivy
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/* ====================================================================
*
* Copyright(c) 2003, Andriy Shapochka
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the ASHWOOD nor the
* names of its contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
*
* This software consists of voluntary contributions made by
* individuals on behalf of the ASHWOOD Project and was originally
* created by Andriy Shapochka.
*
*/
package org.apache.cayenne.ashwood.graph;
import java.util.Iterator;
/**
* @since 3.1
*/
public class ReversedIteration implements DigraphIteration {
private DigraphIteration wrappedIteration;
public ReversedIteration(DigraphIteration wrappedIteration) {
this.wrappedIteration = wrappedIteration;
}
public Iterator vertexIterator() {
return wrappedIteration.vertexIterator();
}
public ArcIterator arcIterator() {
return new ReversedArcIterator(wrappedIteration.arcIterator());
}
public ArcIterator outgoingIterator(E vertex) {
return new ReversedArcIterator(wrappedIteration.incomingIterator(vertex));
}
public ArcIterator incomingIterator(E vertex) {
return new ReversedArcIterator(wrappedIteration.outgoingIterator(vertex));
}
public static class ReversedArcIterator implements ArcIterator {
private ArcIterator wrappedIterator;
public ReversedArcIterator(ArcIterator wrappedIterator) {
ReversedArcIterator.this.wrappedIterator = wrappedIterator;
}
public S getOrigin() {
return wrappedIterator.getDestination();
}
public S getDestination() {
return wrappedIterator.getOrigin();
}
public boolean hasNext() {
return wrappedIterator.hasNext();
}
public T next() {
return wrappedIterator.next();
}
public void remove() {
wrappedIterator.remove();
}
}
}