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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 2012 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.director.simple;
import org.drools.planner.core.score.Score;
import org.drools.planner.core.score.director.AbstractScoreDirector;
import org.drools.planner.core.score.director.ScoreDirector;
import org.drools.planner.core.solution.Solution;
/**
* Simple java implementation of {@link ScoreDirector}, which recalculates the {@link Score}
* of the {@link Solution} workingSolution every time. This is non-incremental calculation, which is slow.
* @see ScoreDirector
*/
public class SimpleScoreDirector extends AbstractScoreDirector {
private final SimpleScoreCalculator simpleScoreCalculator;
public SimpleScoreDirector(SimpleScoreDirectorFactory scoreDirectorFactory,
SimpleScoreCalculator simpleScoreCalculator) {
super(scoreDirectorFactory);
this.simpleScoreCalculator = simpleScoreCalculator;
}
public void setWorkingSolution(Solution workingSolution) {
this.workingSolution = workingSolution;
}
// ************************************************************************
// Complex methods
// ************************************************************************
public void beforeEntityAdded(Object entity) {
// Do nothing
}
public void afterEntityAdded(Object entity) {
// Do nothing
}
public void beforeAllVariablesChanged(Object entity) {
// Do nothing
}
public void afterAllVariablesChanged(Object entity) {
// Do nothing
}
public void beforeVariableChanged(Object entity, String variableName) {
// Do nothing
}
public void afterVariableChanged(Object entity, String variableName) {
// Do nothing
}
public void beforeEntityRemoved(Object entity) {
// Do nothing
}
public void afterEntityRemoved(Object entity) {
// Do nothing
}
public void beforeProblemFactAdded(Object problemFact) {
// Do nothing
}
public void afterProblemFactAdded(Object problemFact) {
// Do nothing
}
public void beforeProblemFactChanged(Object problemFact) {
// Do nothing
}
public void afterProblemFactChanged(Object problemFact) {
// Do nothing
}
public void beforeProblemFactRemoved(Object problemFact) {
// Do nothing
}
public void afterProblemFactRemoved(Object problemFact) {
// Do nothing
}
public Score calculateScore() {
Score score = simpleScoreCalculator.calculateScore(workingSolution);
workingSolution.setScore(score);
calculateCount++;
return score;
}
public void dispose() {
// Do nothing
}
}