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Drools Planner optimizes automated planning by combining metaheuristic search algorithms with rule
engine powered score calculation. This is the drools-planner-core module which contains metaheuristic
algorithms.
/*
* Copyright 2011 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.drools.planner.core.score.buildin.simpledouble;
import org.drools.planner.core.score.Score;
import org.drools.planner.core.score.holder.ScoreHolder;
import org.drools.planner.core.score.definition.AbstractScoreDefinition;
public class SimpleDoubleScoreDefinition extends AbstractScoreDefinition {
private SimpleDoubleScore perfectMaximumScore = new DefaultSimpleDoubleScore(0.0);
private SimpleDoubleScore perfectMinimumScore = new DefaultSimpleDoubleScore(-Double.MAX_VALUE);
public void setPerfectMaximumScore(SimpleDoubleScore perfectMaximumScore) {
this.perfectMaximumScore = perfectMaximumScore;
}
public void setPerfectMinimumScore(SimpleDoubleScore perfectMinimumScore) {
this.perfectMinimumScore = perfectMinimumScore;
}
// ************************************************************************
// Worker methods
// ************************************************************************
@Override
public SimpleDoubleScore getPerfectMaximumScore() {
return perfectMaximumScore;
}
@Override
public SimpleDoubleScore getPerfectMinimumScore() {
return perfectMinimumScore;
}
public Score parseScore(String scoreString) {
return DefaultSimpleDoubleScore.parseScore(scoreString);
}
public double calculateTimeGradient(SimpleDoubleScore startScore, SimpleDoubleScore endScore, SimpleDoubleScore score) {
if (score.getScore() >= endScore.getScore()) {
return 1.0;
} else if (startScore.getScore() >= score.getScore()) {
return 0.0;
}
double scoreTotal = endScore.getScore() - startScore.getScore();
double scoreDelta = score.getScore() - startScore.getScore();
return scoreDelta / scoreTotal;
}
public Double translateScoreToGraphValue(SimpleDoubleScore score) {
return score.getScore();
}
public ScoreHolder buildScoreHolder() {
return new SimpleDoubleScoreHolder();
}
}