/*
* 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.examples.examination.solver.move;
import java.util.Arrays;
import java.util.Collection;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.drools.WorkingMemory;
import org.drools.planner.core.localsearch.decider.acceptor.tabu.TabuPropertyEnabled;
import org.drools.planner.core.move.Move;
import org.drools.planner.examples.examination.domain.Exam;
import org.drools.planner.examples.examination.domain.Period;
import org.drools.planner.examples.examination.domain.Room;
public class ExamSwitchMove implements Move, TabuPropertyEnabled {
private Exam leftExam;
private Exam rightExam;
public ExamSwitchMove(Exam leftExam, Exam rightExam) {
this.leftExam = leftExam;
this.rightExam = rightExam;
}
public boolean isMoveDoable(WorkingMemory workingMemory) {
return !(ObjectUtils.equals(leftExam.getPeriod(), rightExam.getPeriod())
&& ObjectUtils.equals(leftExam.getRoom(), rightExam.getRoom()));
}
public Move createUndoMove(WorkingMemory workingMemory) {
return new ExamSwitchMove(rightExam, leftExam);
}
public void doMove(WorkingMemory workingMemory) {
Period oldLeftPeriod = leftExam.getPeriod();
Period oldRightPeriod = rightExam.getPeriod();
Room oldLeftRoom = leftExam.getRoom();
Room oldRightRoom = rightExam.getRoom();
if (oldLeftPeriod.equals(oldRightPeriod)) {
ExaminationMoveHelper.moveRoom(workingMemory, leftExam, oldRightRoom);
ExaminationMoveHelper.moveRoom(workingMemory, rightExam, oldLeftRoom);
} else if (oldLeftRoom.equals(oldRightRoom)) {
ExaminationMoveHelper.movePeriod(workingMemory, leftExam, oldRightPeriod);
ExaminationMoveHelper.movePeriod(workingMemory, rightExam, oldLeftPeriod);
} else {
ExaminationMoveHelper.moveExam(workingMemory, leftExam, oldRightPeriod, oldRightRoom);
ExaminationMoveHelper.moveExam(workingMemory, rightExam, oldLeftPeriod, oldLeftRoom);
}
}
public Collection<? extends Object> getTabuProperties() {
return Arrays.<Exam>asList(leftExam, rightExam);
}
public boolean equals(Object o) {
if (this == o) {
return true;
} else if (o instanceof ExamSwitchMove) {
ExamSwitchMove other = (ExamSwitchMove) o;
return new EqualsBuilder()
.append(leftExam, other.leftExam)
.append(rightExam, other.rightExam)
.isEquals();
} else {
return false;
}
}
public int hashCode() {
return new HashCodeBuilder()
.append(leftExam)
.append(rightExam)
.toHashCode();
}
public String toString() {
return leftExam + " <=> " + rightExam;
}
}