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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.

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/*
 * Copyright 2011 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.machinereassignment.domain;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.drools.planner.api.domain.solution.PlanningEntityCollectionProperty;
import org.drools.planner.core.score.buildin.hardandsoftlong.HardAndSoftLongScore;
import org.drools.planner.core.solution.Solution;
import org.drools.planner.examples.common.domain.AbstractPersistable;
import org.drools.planner.examples.machinereassignment.domain.solver.MrServiceDependency;

@XStreamAlias("MachineReassignment")
public class MachineReassignment extends AbstractPersistable implements Solution {

    private MrGlobalPenaltyInfo globalPenaltyInfo;
    private List resourceList;
    private List neighborhoodList;
    private List locationList;
    private List machineList;
    private List machineCapacityList;
    private List serviceList;
    private List processList;
    private List balancePenaltyList;

    private List processAssignmentList;

    private HardAndSoftLongScore score;

    public MrGlobalPenaltyInfo getGlobalPenaltyInfo() {
        return globalPenaltyInfo;
    }

    public void setGlobalPenaltyInfo(MrGlobalPenaltyInfo globalPenaltyInfo) {
        this.globalPenaltyInfo = globalPenaltyInfo;
    }

    public List getResourceList() {
        return resourceList;
    }

    public void setResourceList(List resourceList) {
        this.resourceList = resourceList;
    }

    public List getNeighborhoodList() {
        return neighborhoodList;
    }

    public void setNeighborhoodList(List neighborhoodList) {
        this.neighborhoodList = neighborhoodList;
    }

    public List getLocationList() {
        return locationList;
    }

    public void setLocationList(List locationList) {
        this.locationList = locationList;
    }

    public List getMachineList() {
        return machineList;
    }

    public void setMachineList(List machineList) {
        this.machineList = machineList;
    }

    public List getMachineCapacityList() {
        return machineCapacityList;
    }

    public void setMachineCapacityList(List machineCapacityList) {
        this.machineCapacityList = machineCapacityList;
    }

    public List getServiceList() {
        return serviceList;
    }

    public void setServiceList(List serviceList) {
        this.serviceList = serviceList;
    }

    public List getProcessList() {
        return processList;
    }

    public void setProcessList(List processList) {
        this.processList = processList;
    }

    public List getBalancePenaltyList() {
        return balancePenaltyList;
    }

    public void setBalancePenaltyList(List balancePenaltyList) {
        this.balancePenaltyList = balancePenaltyList;
    }

    @PlanningEntityCollectionProperty
    public List getProcessAssignmentList() {
        return processAssignmentList;
    }

    public void setProcessAssignmentList(List processAssignmentList) {
        this.processAssignmentList = processAssignmentList;
    }

    public HardAndSoftLongScore getScore() {
        return score;
    }

    public void setScore(HardAndSoftLongScore score) {
        this.score = score;
    }

    // ************************************************************************
    // Complex methods
    // ************************************************************************

    public Collection getProblemFacts() {
        List facts = new ArrayList();
        facts.add(globalPenaltyInfo);
        facts.addAll(resourceList);
        facts.addAll(neighborhoodList);
        facts.addAll(locationList);
        facts.addAll(machineList);
        facts.addAll(machineCapacityList);
        facts.addAll(serviceList);
        facts.addAll(createServiceDependencyList());
        facts.addAll(processList);
        facts.addAll(balancePenaltyList);
        // Do not add the planning entity's (bedDesignationList) because that will be done automatically
        return facts;
    }

    private List createServiceDependencyList() {
        List serviceDependencyList = new ArrayList(serviceList.size() * 5);
        for (MrService service : serviceList) {
            for (MrService toService : service.getToDependencyServiceList()) {
                MrServiceDependency serviceDependency = new MrServiceDependency();
                serviceDependency.setFromService(service);
                serviceDependency.setToService(toService);
                serviceDependencyList.add(serviceDependency);
            }
        }
        return serviceDependencyList;
    }

    /**
     * Clone will only deep copy the {@link #processAssignmentList}.
     */
    public MachineReassignment cloneSolution() {
        MachineReassignment clone = new MachineReassignment();
        clone.id = id;
        clone.globalPenaltyInfo = globalPenaltyInfo;
        clone.resourceList = resourceList;
        clone.neighborhoodList = neighborhoodList;
        clone.locationList = locationList;
        clone.machineList = machineList;
        clone.machineCapacityList = machineCapacityList;
        clone.serviceList = serviceList;
        clone.processList = processList;
        clone.balancePenaltyList = balancePenaltyList;
        List clonedProcessAssignmentList
                = new ArrayList(processAssignmentList.size());
        for (MrProcessAssignment processAssignment : processAssignmentList) {
            MrProcessAssignment clonedProcessAssignment = processAssignment.clone();
            clonedProcessAssignmentList.add(clonedProcessAssignment);
        }
        clone.processAssignmentList = clonedProcessAssignmentList;
        clone.score = score;
        return clone;
    }

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (id == null || !(o instanceof MachineReassignment)) {
            return false;
        } else {
            MachineReassignment other = (MachineReassignment) o;
            if (processAssignmentList.size() != other.processAssignmentList.size()) {
                return false;
            }
            for (Iterator it = processAssignmentList.iterator(),
                    otherIt = other.processAssignmentList.iterator(); it.hasNext();) {
                MrProcessAssignment processAssignment = it.next();
                MrProcessAssignment otherProcessAssignment = otherIt.next();
                // Notice: we don't use equals()
                if (!processAssignment.solutionEquals(otherProcessAssignment)) {
                    return false;
                }
            }
            return true;
        }
    }

    public int hashCode() {
        HashCodeBuilder hashCodeBuilder = new HashCodeBuilder();
        for (MrProcessAssignment processAssignment : processAssignmentList) {
            // Notice: we don't use hashCode()
            hashCodeBuilder.append(processAssignment.solutionHashCode());
        }
        return hashCodeBuilder.toHashCode();
    }

}