/*
* 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.optaplanner.core.impl.heuristic.selector.move.generic.chained;
import java.util.List;
import java.util.ListIterator;
import org.optaplanner.core.impl.domain.variable.descriptor.GenuineVariableDescriptor;
import org.optaplanner.core.impl.heuristic.selector.value.chained.SubChain;
import org.optaplanner.core.impl.score.director.InnerScoreDirector;
import org.optaplanner.core.impl.score.director.ScoreDirector;
public class ChainedMoveUtils {
public static void doChainedChange(ScoreDirector scoreDirector, Object entity,
GenuineVariableDescriptor variableDescriptor, Object toPlanningValue) {
// TODO HACK Avoid downcast
InnerScoreDirector innerScoreDirector = (InnerScoreDirector) scoreDirector;
Object oldValue = variableDescriptor.getValue(entity);
Object oldTrailingEntity = innerScoreDirector.getTrailingEntity(variableDescriptor, entity);
// If chaining == true then toPlanningValue == null guarantees an uninitialized entity
Object newTrailingEntity = toPlanningValue == null ? null
: innerScoreDirector.getTrailingEntity(variableDescriptor, toPlanningValue);
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
scoreDirector.beforeVariableChanged(variableDescriptor, entity);
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, newTrailingEntity);
}
// Close the old chain
if (oldTrailingEntity != null) {
variableDescriptor.setValue(oldTrailingEntity, oldValue);
}
// Change the entity
variableDescriptor.setValue(entity, toPlanningValue);
// Reroute the new chain
if (newTrailingEntity != null) {
variableDescriptor.setValue(newTrailingEntity, entity);
}
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
scoreDirector.afterVariableChanged(variableDescriptor, entity);
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, newTrailingEntity);
}
}
public static void doSubChainChange(ScoreDirector scoreDirector, SubChain subChain,
GenuineVariableDescriptor variableDescriptor, Object toPlanningValue) {
// TODO HACK Avoid downcast
InnerScoreDirector innerScoreDirector = (InnerScoreDirector) scoreDirector;
Object firstEntity = subChain.getFirstEntity();
Object lastEntity = subChain.getLastEntity();
Object oldFirstValue = variableDescriptor.getValue(firstEntity);
Object oldTrailingEntity = innerScoreDirector.getTrailingEntity(variableDescriptor, lastEntity);
Object newTrailingEntity = innerScoreDirector.getTrailingEntity(variableDescriptor, toPlanningValue);
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
scoreDirector.beforeVariableChanged(variableDescriptor, firstEntity);
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, newTrailingEntity);
}
// Close the old chain
if (oldTrailingEntity != null) {
variableDescriptor.setValue(oldTrailingEntity, oldFirstValue);
}
// Change the entity
variableDescriptor.setValue(firstEntity, toPlanningValue);
// Reroute the new chain
if (newTrailingEntity != null) {
variableDescriptor.setValue(newTrailingEntity, lastEntity);
}
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
scoreDirector.afterVariableChanged(variableDescriptor, firstEntity);
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, newTrailingEntity);
}
}
public static void doReverseSubChainChange(ScoreDirector scoreDirector, SubChain subChain,
GenuineVariableDescriptor variableDescriptor, Object toPlanningValue) {
// TODO HACK Avoid downcast
InnerScoreDirector innerScoreDirector = (InnerScoreDirector) scoreDirector;
Object firstEntity = subChain.getFirstEntity();
Object lastEntity = subChain.getLastEntity();
Object oldFirstValue = variableDescriptor.getValue(firstEntity);
Object oldTrailingEntity = innerScoreDirector.getTrailingEntity(variableDescriptor, lastEntity);
Object newTrailingEntity = innerScoreDirector.getTrailingEntity(variableDescriptor, toPlanningValue);
boolean unmovedReverse = firstEntity == newTrailingEntity;
List<Object> entityList = subChain.getEntityList();
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
for (ListIterator<Object> it = entityList.listIterator(entityList.size()); it.hasPrevious();) {
Object entity = it.previous();
scoreDirector.beforeVariableChanged(variableDescriptor, entity);
}
if (!unmovedReverse) {
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.beforeVariableChanged(variableDescriptor, newTrailingEntity);
}
}
// Close the old chain
if (oldTrailingEntity != null) {
variableDescriptor.setValue(oldTrailingEntity, oldFirstValue);
}
// Change the entity
Object nextEntity = toPlanningValue;
for (ListIterator<Object> it = entityList.listIterator(entityList.size()); it.hasPrevious();) {
Object entity = it.previous();
variableDescriptor.setValue(entity, nextEntity);
nextEntity = entity;
}
if (unmovedReverse) {
// Reroute the old chain
if (oldTrailingEntity != null) {
variableDescriptor.setValue(oldTrailingEntity, firstEntity);
}
} else {
// Reroute the new chain
if (newTrailingEntity != null) {
variableDescriptor.setValue(newTrailingEntity, firstEntity);
}
}
// Close the old chain
if (oldTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, oldTrailingEntity);
}
// Change the entity
for (ListIterator<Object> it = entityList.listIterator(entityList.size()); it.hasPrevious();) {
Object entity = it.previous();
scoreDirector.afterVariableChanged(variableDescriptor, entity);
}
if (!unmovedReverse) {
// Reroute the new chain
if (newTrailingEntity != null) {
scoreDirector.afterVariableChanged(variableDescriptor, newTrailingEntity);
}
}
}
private ChainedMoveUtils() {
}
}