org.drools.planner.examples.manners2009.solver.move.SeatDesignationSwitchMove Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of drools-planner-examples Show documentation
Show all versions of drools-planner-examples Show documentation
Drools Planner optimizes automated planning by combining metaheuristic search algorithms with rule
engine powered score calculation. This is the drools-planner-examples module which contains examples on how to use
Drools Planner.
/*
* 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.manners2009.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.FactHandle;
import org.drools.planner.core.localsearch.decider.acceptor.tabu.TabuPropertyEnabled;
import org.drools.planner.core.move.Move;
import org.drools.planner.examples.manners2009.domain.Seat;
import org.drools.planner.examples.manners2009.domain.SeatDesignation;
public class SeatDesignationSwitchMove implements Move, TabuPropertyEnabled {
private SeatDesignation leftSeatDesignation;
private SeatDesignation rightSeatDesignation;
public SeatDesignationSwitchMove(SeatDesignation leftSeatDesignation, SeatDesignation rightSeatDesignation) {
this.leftSeatDesignation = leftSeatDesignation;
this.rightSeatDesignation = rightSeatDesignation;
}
public boolean isMoveDoable(WorkingMemory workingMemory) {
return !ObjectUtils.equals(leftSeatDesignation.getSeat(), rightSeatDesignation.getSeat());
}
public Move createUndoMove(WorkingMemory workingMemory) {
return new SeatDesignationSwitchMove(rightSeatDesignation, leftSeatDesignation);
}
public void doMove(WorkingMemory workingMemory) {
Seat oldLeftSeat = leftSeatDesignation.getSeat();
Seat oldRightSeat = rightSeatDesignation.getSeat();
moveSeat(workingMemory, leftSeatDesignation, oldRightSeat);
moveSeat(workingMemory, rightSeatDesignation, oldLeftSeat);
}
// Extract to helper class if other moves are created
private static void moveSeat(WorkingMemory workingMemory, SeatDesignation seatDesignation, Seat toSeat) {
FactHandle factHandle = workingMemory.getFactHandle(seatDesignation);
seatDesignation.setSeat(toSeat);
workingMemory.update(factHandle, seatDesignation);
}
public Collection getTabuProperties() {
return Arrays.asList(leftSeatDesignation, rightSeatDesignation);
}
public boolean equals(Object o) {
if (this == o) {
return true;
} else if (o instanceof SeatDesignationSwitchMove) {
SeatDesignationSwitchMove other = (SeatDesignationSwitchMove) o;
return new EqualsBuilder()
.append(leftSeatDesignation, other.leftSeatDesignation)
.append(rightSeatDesignation, other.rightSeatDesignation)
.isEquals();
} else {
return false;
}
}
public int hashCode() {
return new HashCodeBuilder()
.append(leftSeatDesignation)
.append(rightSeatDesignation)
.toHashCode();
}
public String toString() {
return leftSeatDesignation + " <=> " + rightSeatDesignation;
}
}