org.drools.planner.examples.nurserostering.solver.move.factory.ShiftAssignmentSwapMoveFactory Maven / Gradle / Ivy
/*
* 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.factory;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import org.drools.planner.core.heuristic.selector.move.factory.MoveListFactory;
import org.drools.planner.core.move.Move;
import org.drools.planner.core.solution.Solution;
import org.drools.planner.examples.nurserostering.domain.ShiftAssignment;
import org.drools.planner.examples.nurserostering.domain.NurseRoster;
import org.drools.planner.examples.nurserostering.domain.solver.MovableShiftAssignmentSelectionFilter;
import org.drools.planner.examples.nurserostering.solver.move.ShiftAssignmentSwapMove;
public class ShiftAssignmentSwapMoveFactory implements MoveListFactory {
private MovableShiftAssignmentSelectionFilter filter = new MovableShiftAssignmentSelectionFilter();
public List createMoveList(Solution solution) {
NurseRoster nurseRoster = (NurseRoster) solution;
// Filter out every immovable ShiftAssignment
List shiftAssignmentList = new ArrayList(
nurseRoster.getShiftAssignmentList());
for (Iterator it = shiftAssignmentList.iterator(); it.hasNext(); ) {
ShiftAssignment shiftAssignment = it.next();
if (!filter.accept(nurseRoster, shiftAssignment)) {
it.remove();
}
}
List moveList = new ArrayList();
for (ListIterator leftIt = shiftAssignmentList.listIterator(); leftIt.hasNext();) {
ShiftAssignment leftShiftAssignment = leftIt.next();
for (ListIterator rightIt = shiftAssignmentList.listIterator(leftIt.nextIndex()); rightIt.hasNext();) {
ShiftAssignment rightShiftAssignment = rightIt.next();
moveList.add(new ShiftAssignmentSwapMove(leftShiftAssignment, rightShiftAssignment));
}
}
return moveList;
}
}