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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 2014 Red Hat, Inc. and/or its affiliates.
 *
 * 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.cheaptime.domain;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import org.optaplanner.core.api.domain.entity.PlanningEntity;
import org.optaplanner.core.api.domain.valuerange.CountableValueRange;
import org.optaplanner.core.api.domain.valuerange.ValueRangeFactory;
import org.optaplanner.core.api.domain.valuerange.ValueRangeProvider;
import org.optaplanner.core.api.domain.variable.PlanningVariable;
import org.optaplanner.examples.cheaptime.domain.solver.TaskAssignmentDifficultyComparator;
import org.optaplanner.examples.common.domain.AbstractPersistable;

@PlanningEntity(difficultyComparatorClass = TaskAssignmentDifficultyComparator.class)
@XStreamAlias("CtTaskAssignment")
public class TaskAssignment extends AbstractPersistable {

    private Task task;

    // Planning variables: changes during planning, between score calculations.
    private Machine machine;
    private Integer startPeriod;

    public Task getTask() {
        return task;
    }

    public void setTask(Task task) {
        this.task = task;
    }

    @PlanningVariable(valueRangeProviderRefs = {"machineRange"})
    public Machine getMachine() {
        return machine;
    }

    public void setMachine(Machine machine) {
        this.machine = machine;
    }

    @PlanningVariable(valueRangeProviderRefs = {"startPeriodRange"})
    public Integer getStartPeriod() {
        return startPeriod;
    }

    public void setStartPeriod(Integer startPeriod) {
        this.startPeriod = startPeriod;
    }

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

    /**
     * The startPeriod is included and the endPeriod is excluded.
     * @return null if {@link #getStartPeriod()} is null
     */
    public Integer getEndPeriod() {
        if (startPeriod == null) {
            return null;
        }
        return startPeriod + task.getDuration();
    }

    public String getLabel() {
        return task.getLabel();
    }

    // ************************************************************************
    // Ranges
    // ************************************************************************

    @ValueRangeProvider(id = "startPeriodRange")
    public CountableValueRange getStartPeriodRange() {
        return ValueRangeFactory.createIntValueRange(task.getStartPeriodRangeFrom(), task.getStartPeriodRangeTo());
    }

}