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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 2015 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.solver.drools;

import static java.util.Comparator.comparing;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;

import org.optaplanner.examples.cheaptime.domain.Machine;
import org.optaplanner.examples.cheaptime.domain.Task;
import org.optaplanner.examples.cheaptime.domain.TaskAssignment;
import org.optaplanner.examples.cheaptime.domain.TaskRequirement;

public class MachinePeriodPart implements Comparable {

    private static final Comparator COMPARATOR = comparing(
            (MachinePeriodPart machinePeriodPart) -> machinePeriodPart.machine.getIndex())
                    .thenComparingInt(MachinePeriodPart::getPeriod)
                    .thenComparing(MachinePeriodPart::isActive)
                    .thenComparingInt(machinePeriodPart -> machinePeriodPart.resourceAvailableList.length);

    private final Machine machine;
    private final int period;

    private boolean active;
    private int[] resourceAvailableList;
    private int resourceInShortTotal;

    public MachinePeriodPart(Machine machine, int period, int resourceListSize, List taskAssignmentList) {
        this.machine = machine;
        this.period = period;

        active = false;

        resourceAvailableList = new int[resourceListSize];
        for (int i = 0; i < resourceListSize; i++) {
            resourceAvailableList[i] = machine.getMachineCapacityList().get(i).getCapacity();
        }

        for (TaskAssignment taskAssignment : taskAssignmentList) {
            addTaskAssignment(taskAssignment);
        }

        resourceInShortTotal = 0;
        for (int resourceAvailable : resourceAvailableList) {
            if (resourceAvailable < 0) {
                resourceInShortTotal += resourceAvailable;
            }
        }
    }

    private void addTaskAssignment(TaskAssignment taskAssignment) {
        active = true;
        Task task = taskAssignment.getTask();
        for (int i = 0; i < resourceAvailableList.length; i++) {
            TaskRequirement taskRequirement = task.getTaskRequirementList().get(i);
            resourceAvailableList[i] -= taskRequirement.getResourceUsage();
        }
    }

    public boolean isActive() {
        return active;
    }

    public void setActive(boolean active) {
        this.active = active;
    }

    public int[] getResourceAvailableList() {
        return resourceAvailableList;
    }

    public void setResourceAvailableList(int[] resourceAvailableList) {
        this.resourceAvailableList = resourceAvailableList;
    }

    public int getResourceInShortTotal() {
        return resourceInShortTotal;
    }

    public Machine getMachine() {
        return machine;
    }

    public int getPeriod() {
        return period;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final MachinePeriodPart other = (MachinePeriodPart) o;
        return Objects.equals(machine, other.machine) &&
                period == other.period &&
                active == other.active &&
                Arrays.equals(resourceAvailableList, other.resourceAvailableList);
    }

    @Override
    public int hashCode() {
        return Objects.hash(machine, period, active, Arrays.hashCode(resourceAvailableList));
    }

    @Override
    public int compareTo(MachinePeriodPart other) {
        return COMPARATOR.compare(this, other);
    }

    @Override
    public String toString() {
        return machine + ", period = " + period + ", active = " + active
                + ", resourceAvailableList = " + Arrays.toString(resourceAvailableList);
    }
}