/*
* 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.curriculumcourse.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.curriculumcourse.domain.Lecture;
import org.drools.planner.examples.curriculumcourse.domain.Period;
import org.drools.planner.examples.curriculumcourse.domain.Room;
public class LectureSwitchMove implements Move, TabuPropertyEnabled {
private Lecture leftLecture;
private Lecture rightLecture;
public LectureSwitchMove(Lecture leftLecture, Lecture rightLecture) {
this.leftLecture = leftLecture;
this.rightLecture = rightLecture;
}
public boolean isMoveDoable(WorkingMemory workingMemory) {
return !(ObjectUtils.equals(leftLecture.getPeriod(), rightLecture.getPeriod())
&& ObjectUtils.equals(leftLecture.getRoom(), rightLecture.getRoom()));
}
public Move createUndoMove(WorkingMemory workingMemory) {
return new LectureSwitchMove(rightLecture, leftLecture);
}
public void doMove(WorkingMemory workingMemory) {
Period oldLeftPeriod = leftLecture.getPeriod();
Period oldRightPeriod = rightLecture.getPeriod();
Room oldLeftRoom = leftLecture.getRoom();
Room oldRightRoom = rightLecture.getRoom();
if (oldLeftPeriod.equals(oldRightPeriod)) {
CurriculumCourseMoveHelper.moveRoom(workingMemory, leftLecture, oldRightRoom);
CurriculumCourseMoveHelper.moveRoom(workingMemory, rightLecture, oldLeftRoom);
} else if (oldLeftRoom.equals(oldRightRoom)) {
CurriculumCourseMoveHelper.movePeriod(workingMemory, leftLecture, oldRightPeriod);
CurriculumCourseMoveHelper.movePeriod(workingMemory, rightLecture, oldLeftPeriod);
} else {
CurriculumCourseMoveHelper.moveLecture(workingMemory, leftLecture, oldRightPeriod, oldRightRoom);
CurriculumCourseMoveHelper.moveLecture(workingMemory, rightLecture, oldLeftPeriod, oldLeftRoom);
}
}
public Collection<? extends Object> getTabuProperties() {
return Arrays.<Lecture>asList(leftLecture, rightLecture);
}
public boolean equals(Object o) {
if (this == o) {
return true;
} else if (o instanceof LectureSwitchMove) {
LectureSwitchMove other = (LectureSwitchMove) o;
return new EqualsBuilder()
.append(leftLecture, other.leftLecture)
.append(rightLecture, other.rightLecture)
.isEquals();
} else {
return false;
}
}
public int hashCode() {
return new HashCodeBuilder()
.append(leftLecture)
.append(rightLecture)
.toHashCode();
}
public String toString() {
return leftLecture + " <=> " + rightLecture;
}
}