/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* 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.optaplanner.core.impl.heuristic.selector.move.decorator;
import java.util.Collections;
import java.util.Iterator;
import org.optaplanner.core.config.heuristic.selector.common.SelectionCacheType;
import org.optaplanner.core.impl.heuristic.move.Move;
import org.optaplanner.core.impl.heuristic.selector.move.MoveSelector;
public class ShufflingMoveSelector extends AbstractCachingMoveSelector {
public ShufflingMoveSelector(MoveSelector childMoveSelector, SelectionCacheType cacheType) {
super(childMoveSelector, cacheType);
}
// ************************************************************************
// Worker methods
// ************************************************************************
@Override
public boolean isNeverEnding() {
return false;
}
@Override
public Iterator<Move> iterator() {
Collections.shuffle(cachedMoveList, workingRandom);
logger.trace(" Shuffled cachedMoveList with size ({}) in moveSelector({}).",
cachedMoveList.size(), this);
return cachedMoveList.iterator();
}
@Override
public String toString() {
return "Shuffling(" + childMoveSelector + ")";
}
}