/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* 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.core.impl.heuristic.selector;
import java.util.Random;
import org.optaplanner.core.config.heuristic.selector.common.SelectionCacheType;
import org.optaplanner.core.impl.phase.event.PhaseLifecycleSupport;
import org.optaplanner.core.impl.phase.scope.AbstractPhaseScope;
import org.optaplanner.core.impl.phase.scope.AbstractStepScope;
import org.optaplanner.core.impl.solver.scope.DefaultSolverScope;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Abstract superclass for {@link Selector}.
* @see Selector
*/
public abstract class AbstractSelector implements Selector {
protected final transient Logger logger = LoggerFactory.getLogger(getClass());
protected PhaseLifecycleSupport phaseLifecycleSupport = new PhaseLifecycleSupport();
protected Random workingRandom = null;
@Override
public void solvingStarted(DefaultSolverScope solverScope) {
workingRandom = solverScope.getWorkingRandom();
phaseLifecycleSupport.fireSolvingStarted(solverScope);
}
@Override
public void phaseStarted(AbstractPhaseScope phaseScope) {
phaseLifecycleSupport.firePhaseStarted(phaseScope);
}
@Override
public void stepStarted(AbstractStepScope stepScope) {
phaseLifecycleSupport.fireStepStarted(stepScope);
}
@Override
public void stepEnded(AbstractStepScope stepScope) {
phaseLifecycleSupport.fireStepEnded(stepScope);
}
@Override
public void phaseEnded(AbstractPhaseScope phaseScope) {
phaseLifecycleSupport.firePhaseEnded(phaseScope);
}
@Override
public void solvingEnded(DefaultSolverScope solverScope) {
phaseLifecycleSupport.fireSolvingEnded(solverScope);
workingRandom = null;
}
@Override
public SelectionCacheType getCacheType() {
return SelectionCacheType.JUST_IN_TIME;
}
}