AccumulateTasksDeadlineStatusVisitor.java example

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/*
 * This file is part of LibrePlan
 *
 * Copyright (C) 2011-2012 Igalia, S.L.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.libreplan.business.planner.entities.visitors;

/**
 * Visits task graphs computing deadline violation statuses
 * filling in a Map summarizing the status of all tasks.
 *
 * @author Nacho Barrientos <nacho@igalia.com>
 * @author Manuel Rego Casasnovas <rego@igalia.com>
 */
import java.util.EnumMap;
import java.util.Map;

import org.libreplan.business.planner.entities.Task;
import org.libreplan.business.planner.entities.TaskDeadlineViolationStatusEnum;
import org.libreplan.business.planner.entities.TaskElement;
import org.libreplan.business.planner.entities.TaskGroup;
import org.libreplan.business.planner.entities.TaskMilestone;
import org.libreplan.business.util.TaskElementVisitor;

public class AccumulateTasksDeadlineStatusVisitor extends TaskElementVisitor {

    private Map<TaskDeadlineViolationStatusEnum, Integer> taskDeadlineViolationStatusData;

    public AccumulateTasksDeadlineStatusVisitor() {
        this.taskDeadlineViolationStatusData = new EnumMap<TaskDeadlineViolationStatusEnum, Integer>(
                TaskDeadlineViolationStatusEnum.class);
        for (TaskDeadlineViolationStatusEnum status : TaskDeadlineViolationStatusEnum
                .values()) {
            this.taskDeadlineViolationStatusData.put(status, new Integer(0));
        }
    }

    public Map<TaskDeadlineViolationStatusEnum, Integer> getTaskDeadlineViolationStatusData() {
        return taskDeadlineViolationStatusData;
    }

    public void visit(Task task) {
        calculateDeadlineViolationStatus(task);
    }

    public void visit(TaskGroup taskGroup) {
        if (!taskGroup.isRoot()) {
            calculateDeadlineViolationStatus(taskGroup);
        }
        for (TaskElement each: taskGroup.getChildren()) {
            each.acceptVisitor(this);
        }
    }

    public void visit(TaskMilestone taskMilestone) {
        calculateDeadlineViolationStatus(taskMilestone);
    }

    private void calculateDeadlineViolationStatus(TaskElement taskElement) {
        TaskDeadlineViolationStatusEnum status = taskElement
                .getDeadlineViolationStatus();
        Integer currentValue = taskDeadlineViolationStatusData.get(status);
        taskDeadlineViolationStatusData.put(status, currentValue + 1);
    }

}