001/*
002 * (C) Copyright 2009 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     arussel
018 */
019package org.nuxeo.ecm.platform.task.core.listener;
020
021import java.util.List;
022
023import org.nuxeo.ecm.core.api.CoreSession;
024import org.nuxeo.ecm.core.api.DocumentModel;
025import org.nuxeo.ecm.core.api.NuxeoPrincipal;
026import org.nuxeo.ecm.core.api.event.DocumentEventTypes;
027import org.nuxeo.ecm.core.event.Event;
028import org.nuxeo.ecm.core.event.EventListener;
029import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
030import org.nuxeo.ecm.platform.task.Task;
031import org.nuxeo.ecm.platform.task.TaskService;
032import org.nuxeo.runtime.api.Framework;
033
034/**
035 * Listener that deletes deletes related tasks of the document.
036 *
037 * @author arussel
038 * @since 5.5
039 */
040public class DeleteTaskForDeletedDocumentListener implements EventListener {
041
042    private TaskService taskService;
043
044    public TaskService getTaskService() {
045        if (taskService == null) {
046            taskService = Framework.getService(TaskService.class);
047        }
048        return taskService;
049    }
050
051    @Override
052    public void handleEvent(Event event) {
053        if (DocumentEventTypes.ABOUT_TO_REMOVE.equals(event.getName())) {
054            DocumentEventContext context = (DocumentEventContext) event.getContext();
055            DocumentModel dm = context.getSourceDocument();
056            CoreSession coreSession = context.getCoreSession();
057            List<Task> tasks = getTaskService().getTaskInstances(dm, (NuxeoPrincipal) null, coreSession);
058            if (!tasks.isEmpty()) {
059                for (Task task : tasks) {
060                    getTaskService().deleteTask(coreSession, task.getId());
061                }
062            }
063        }
064    }
065
066}