/*
* 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.optaplanner.examples.projectjobscheduling.domain.solver;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang.builder.CompareToBuilder;
import org.optaplanner.core.impl.heuristic.selector.common.decorator.SelectionSorterWeightFactory;
import org.optaplanner.examples.projectjobscheduling.domain.ExecutionMode;
import org.optaplanner.examples.projectjobscheduling.domain.ResourceRequirement;
import org.optaplanner.examples.projectjobscheduling.domain.Schedule;
import org.optaplanner.examples.projectjobscheduling.domain.resource.Resource;
public class ExecutionModeStrengthWeightFactory implements SelectionSorterWeightFactory<Schedule, ExecutionMode> {
public Comparable createSorterWeight(Schedule schedule, ExecutionMode executionMode) {
Map<Resource, Integer> requirementTotalMap = new HashMap<Resource, Integer>(
executionMode.getResourceRequirementList().size());
for (ResourceRequirement resourceRequirement : executionMode.getResourceRequirementList()) {
requirementTotalMap.put(resourceRequirement.getResource(), 0);
}
for (ResourceRequirement resourceRequirement : schedule.getResourceRequirementList()) {
Resource resource = resourceRequirement.getResource();
Integer total = requirementTotalMap.get(resource);
if (total != null) {
total += resourceRequirement.getRequirement();
requirementTotalMap.put(resource, total);
}
}
double requirementDesirability = 0.0;
for (ResourceRequirement resourceRequirement : executionMode.getResourceRequirementList()) {
Resource resource = resourceRequirement.getResource();
int total = requirementTotalMap.get(resource);
if (total > resource.getCapacity()) {
requirementDesirability += (double) (total - resource.getCapacity())
* (double) resourceRequirement.getRequirement()
* (resource.isRenewable() ? 1.0 : 100.0);
}
}
return new ExecutionModeStrengthWeight(executionMode, requirementDesirability);
}
public static class ExecutionModeStrengthWeight implements Comparable<ExecutionModeStrengthWeight> {
private final ExecutionMode executionMode;
private final double requirementDesirability;
public ExecutionModeStrengthWeight(ExecutionMode executionMode, double requirementDesirability) {
this.executionMode = executionMode;
this.requirementDesirability = requirementDesirability;
}
public int compareTo(ExecutionModeStrengthWeight other) {
return new CompareToBuilder()
// The less requirementsWeight, the less desirable resources are used
.append(requirementDesirability, other.requirementDesirability)
.append(executionMode.getId(), other.executionMode.getId())
.toComparison();
}
}
}