/**
* 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.nurserostering.solver.move;
import java.util.Collection;
import java.util.Collections;
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.nurserostering.domain.Employee;
import org.drools.planner.examples.nurserostering.domain.Assignment;
/**
* @author Geoffrey De Smet
*/
public class EmployeeChangeMove implements Move, TabuPropertyEnabled {
private Assignment assignment;
private Employee toEmployee;
public EmployeeChangeMove(Assignment assignment, Employee toEmployee) {
this.assignment = assignment;
this.toEmployee = toEmployee;
}
public boolean isMoveDoable(WorkingMemory workingMemory) {
return !ObjectUtils.equals(assignment.getEmployee(), toEmployee);
}
public Move createUndoMove(WorkingMemory workingMemory) {
return new EmployeeChangeMove(assignment, assignment.getEmployee());
}
public void doMove(WorkingMemory workingMemory) {
NurseRosteringMoveHelper.moveEmployee(workingMemory, assignment, toEmployee);
}
public Collection<? extends Object> getTabuProperties() {
return Collections.singletonList(assignment);
}
public boolean equals(Object o) {
if (this == o) {
return true;
} else if (o instanceof EmployeeChangeMove) {
EmployeeChangeMove other = (EmployeeChangeMove) o;
return new EqualsBuilder()
.append(assignment, other.assignment)
.append(toEmployee, other.toEmployee)
.isEquals();
} else {
return false;
}
}
public int hashCode() {
return new HashCodeBuilder()
.append(assignment)
.append(toEmployee)
.toHashCode();
}
public String toString() {
return assignment + " => " + toEmployee;
}
}