org.drools.planner.core.termination.ScoreAttainedTermination Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of drools-planner-core Show documentation
Show all versions of drools-planner-core Show documentation
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 2010 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.termination;
import org.drools.planner.core.phase.AbstractSolverPhaseScope;
import org.drools.planner.core.score.Score;
import org.drools.planner.core.solver.DefaultSolverScope;
public class ScoreAttainedTermination extends AbstractTermination {
private Score scoreAttained;
public void setScoreAttained(Score scoreAttained) {
this.scoreAttained = scoreAttained;
}
// ************************************************************************
// Worker methods
// ************************************************************************
public boolean isSolverTerminated(DefaultSolverScope solverScope) {
Score bestScore = solverScope.getBestScore();
return isTerminated(bestScore);
}
public boolean isPhaseTerminated(AbstractSolverPhaseScope solverPhaseScope) {
Score bestScore = solverPhaseScope.getBestScore();
return isTerminated(bestScore);
}
private boolean isTerminated(Score bestScore) {
return bestScore != null && bestScore.compareTo(scoreAttained) >= 0;
}
public double calculateSolverTimeGradient(DefaultSolverScope solverScope) {
Score startingInitializedScore = solverScope.getStartingInitializedScore();
Score bestScore = solverScope.getBestScore();
return solverScope.getScoreDefinition().calculateTimeGradient(
startingInitializedScore, scoreAttained, bestScore);
}
public double calculatePhaseTimeGradient(AbstractSolverPhaseScope solverPhaseScope) {
Score startingInitializedScore = solverPhaseScope.getStartingScore();
Score bestScore = solverPhaseScope.getBestScore();
return solverPhaseScope.getScoreDefinition().calculateTimeGradient(startingInitializedScore, scoreAttained, bestScore);
}
}