/*
* Copyright 2014 JBoss Inc
*
* 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.localsearch.decider.forager.finalist;
import org.optaplanner.core.api.score.Score;
import org.optaplanner.core.impl.localsearch.scope.LocalSearchMoveScope;
import org.optaplanner.core.impl.localsearch.scope.LocalSearchPhaseScope;
import org.optaplanner.core.impl.localsearch.scope.LocalSearchStepScope;
/**
* Default implementation of {@link FinalistPodium}.
* @see FinalistPodium
*/
public class HighestScoreFinalistPodium extends AbstractFinalistPodium {
protected Score finalistScore;
@Override
public void stepStarted(LocalSearchStepScope stepScope) {
super.stepStarted(stepScope);
finalistScore = null;
}
public void addMove(LocalSearchMoveScope moveScope) {
boolean accepted = moveScope.getAccepted();
if (finalistIsAccepted && !accepted) {
return;
}
if (accepted && !finalistIsAccepted) {
finalistIsAccepted = true;
finalistScore = null;
}
Score moveScore = moveScope.getScore();
int scoreComparison = doComparison(moveScore);
if (scoreComparison > 0) {
finalistScore = moveScore;
finalistList.clear();
finalistList.add(moveScope);
} else if (scoreComparison == 0) {
finalistList.add(moveScope);
}
}
private int doComparison(Score moveScore) {
if (finalistScore == null) {
return 1;
}
return moveScore.compareTo(finalistScore);
}
@Override
public void phaseEnded(LocalSearchPhaseScope phaseScope) {
super.phaseEnded(phaseScope);
finalistScore = null;
}
}