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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.

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/*
 * 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;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.drools.planner.core.domain.solution.SolutionDescriptor;
import org.drools.planner.core.domain.variable.PlanningVariableDescriptor;
import org.drools.planner.core.score.Score;
import org.drools.planner.core.score.definition.ScoreDefinition;
import org.drools.planner.core.solution.Solution;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Abstract superclass for {@link ScoreDirector}.
 * @see ScoreDirector
 */
public abstract class AbstractScoreDirector implements ScoreDirector {

    protected final transient Logger logger = LoggerFactory.getLogger(getClass());

    protected final F scoreDirectorFactory;

    protected Solution workingSolution;

    protected long calculateCount = 0L;

    protected AbstractScoreDirector(F scoreDirectorFactory) {
        this.scoreDirectorFactory = scoreDirectorFactory;
    }

    public SolutionDescriptor getSolutionDescriptor() {
        return scoreDirectorFactory.getSolutionDescriptor();
    }

    public ScoreDefinition getScoreDefinition() {
        return scoreDirectorFactory.getScoreDefinition();
    }

    public Solution getWorkingSolution() {
        return workingSolution;
    }

    public long getCalculateCount() {
        return calculateCount;
    }

    // ************************************************************************
    // Complex methods
    // ************************************************************************

    public List