/*
* Copyright 2013 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.benchmark.impl.statistic.bestsolutionmutation;
import java.util.List;
import org.optaplanner.benchmark.config.statistic.ProblemStatisticType;
import org.optaplanner.benchmark.impl.result.SingleBenchmarkResult;
import org.optaplanner.benchmark.impl.statistic.ProblemBasedSingleStatistic;
import org.optaplanner.core.api.domain.solution.Solution;
import org.optaplanner.core.api.solver.Solver;
import org.optaplanner.core.api.solver.event.BestSolutionChangedEvent;
import org.optaplanner.core.api.solver.event.SolverEventListener;
import org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor;
import org.optaplanner.core.impl.domain.solution.mutation.MutationCounter;
import org.optaplanner.core.impl.score.definition.ScoreDefinition;
import org.optaplanner.core.impl.score.director.InnerScoreDirectorFactory;
public class BestSolutionMutationSingleStatistic extends ProblemBasedSingleStatistic<BestSolutionMutationStatisticPoint> {
private BestSolutionMutationSingleStatisticListener listener;
public BestSolutionMutationSingleStatistic(SingleBenchmarkResult singleBenchmarkResult) {
super(singleBenchmarkResult, ProblemStatisticType.BEST_SOLUTION_MUTATION);
listener = new BestSolutionMutationSingleStatisticListener();
}
// ************************************************************************
// Lifecycle methods
// ************************************************************************
public void open(Solver solver) {
InnerScoreDirectorFactory scoreDirectorFactory = (InnerScoreDirectorFactory) solver.getScoreDirectorFactory();
SolutionDescriptor solutionDescriptor = scoreDirectorFactory.getSolutionDescriptor();
listener.setMutationCounter(new MutationCounter(solutionDescriptor));
solver.addEventListener(listener);
}
public void close(Solver solver) {
solver.removeEventListener(listener);
}
private class BestSolutionMutationSingleStatisticListener implements SolverEventListener<Solution> {
private MutationCounter mutationCounter;
private Solution oldBestSolution = null;
private void setMutationCounter(MutationCounter mutationCounter) {
if (this.mutationCounter != null) {
throw new IllegalStateException("Impossible state: mutationCounter (" + mutationCounter
+ ") is not null.");
}
this.mutationCounter = mutationCounter;
}
public void bestSolutionChanged(BestSolutionChangedEvent<Solution> event) {
int mutationCount;
Solution newBestSolution = event.getNewBestSolution();
if (oldBestSolution == null) {
mutationCount = 0;
} else {
mutationCount = mutationCounter.countMutations(oldBestSolution, newBestSolution);
}
pointList.add(new BestSolutionMutationStatisticPoint(
event.getTimeMillisSpent(), mutationCount));
oldBestSolution = newBestSolution;
}
}
// ************************************************************************
// CSV methods
// ************************************************************************
@Override
protected String getCsvHeader() {
return BestSolutionMutationStatisticPoint.buildCsvLine("timeMillisSpent", "mutationCount");
}
@Override
protected BestSolutionMutationStatisticPoint createPointFromCsvLine(ScoreDefinition scoreDefinition,
List<String> csvLine) {
return new BestSolutionMutationStatisticPoint(Long.valueOf(csvLine.get(0)),
Integer.valueOf(csvLine.get(1)));
}
}