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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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/*
 * Copyright 2012 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.vehiclerouting.domain.timewindowed;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import org.optaplanner.core.api.domain.entity.PlanningEntity;
import org.optaplanner.core.api.domain.variable.CustomShadowVariable;
import org.optaplanner.examples.vehiclerouting.domain.Customer;
import org.optaplanner.examples.vehiclerouting.domain.timewindowed.solver.ArrivalTimeUpdatingVariableListener;

@PlanningEntity
@XStreamAlias("VrpTimeWindowedCustomer")
public class TimeWindowedCustomer extends Customer {

    // Times are multiplied by 1000 to avoid floating point arithmetic rounding errors
    private int readyTime;
    private int dueTime;
    private int serviceDuration;

    // Shadow variable
    private Integer arrivalTime;

    /**
     * @return a positive number, the time multiplied by 1000 to avoid floating point arithmetic rounding errors
     */
    public int getReadyTime() {
        return readyTime;
    }

    public void setReadyTime(int readyTime) {
        this.readyTime = readyTime;
    }

    /**
     * @return a positive number, the time multiplied by 1000 to avoid floating point arithmetic rounding errors
     */
    public int getDueTime() {
        return dueTime;
    }

    public void setDueTime(int dueTime) {
        this.dueTime = dueTime;
    }

    /**
     * @return a positive number, the time multiplied by 1000 to avoid floating point arithmetic rounding errors
     */
    public int getServiceDuration() {
        return serviceDuration;
    }

    public void setServiceDuration(int serviceDuration) {
        this.serviceDuration = serviceDuration;
    }

    /**
     * @return a positive number, the time multiplied by 1000 to avoid floating point arithmetic rounding errors
     */
    @CustomShadowVariable(variableListenerClass = ArrivalTimeUpdatingVariableListener.class,
            sources = {@CustomShadowVariable.Source(variableName = "previousStandstill")})
    public Integer getArrivalTime() {
        return arrivalTime;
    }

    public void setArrivalTime(Integer arrivalTime) {
        this.arrivalTime = arrivalTime;
    }

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

    /**
     * @return a positive number, the time multiplied by 1000 to avoid floating point arithmetic rounding errors
     */
    public Integer getDepartureTime() {
        if (arrivalTime == null) {
            return null;
        }
        return Math.max(arrivalTime, readyTime) + serviceDuration;
    }

    public boolean isArrivalBeforeReadyTime() {
        return arrivalTime != null
                && arrivalTime < readyTime;
    }

    public boolean isArrivalAfterDueTime() {
        return arrivalTime != null
                && dueTime < arrivalTime;
    }

    @Override
    public TimeWindowedCustomer getNextCustomer() {
        return (TimeWindowedCustomer) super.getNextCustomer();
    }

}