/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.api;
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import java.util.List;
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import org.jbpm.api.task.Task;
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/** query for tasks.
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*
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* @author Tom Baeyens
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* @author Heiko Braun <heiko.braun@jboss.com> */
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public interface TaskQuery {
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/** name property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_NAME = "name";
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/** assignee property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_ASSIGNEE = "assignee";
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/** createdate property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_CREATEDATE = "createTime";
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/** duedate property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_DUEDATE = "duedate";
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/** priority property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_PRIORITY = "priority";
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/** progress property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_PROGRESS = "progress";
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/** only select tasks for which the given user is the assignee */
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TaskQuery assignee(String userId);
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/** only select tasks that are unassigned.
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* These tasks can still potentially have candidates. */
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TaskQuery unassigned();
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/** only query for tasks for which the given user is a candidate.
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* The user could be associated directly as a candidate participant
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* to the task or the user could be a member of a group that is
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* associated as a candidate group to the task. */
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TaskQuery candidate(String userId);
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/** only select tasks that are associated to the given process instance */
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TaskQuery processInstanceId(String processInstanceId);
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/** only select tasks that are associated to the given process definition */
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TaskQuery processDefinitionId(String processDefinitionId);
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/** only select tasks that are associated to the given activity name. This
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* can be used in combination with the {@link #processDefinitionId(String)} */
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TaskQuery activityName(String activityName);
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/** only select suspended tasks */
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TaskQuery suspended();
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/** only select tasks that are not suspended */
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TaskQuery notSuspended();
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/** select a specific page in the result set */
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TaskQuery page(int firstResult, int maxResults);
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/** order selected tasks ascending for certain {@link #PROPERTY_NAME properties} */
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TaskQuery orderAsc(String property);
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/** order selected tasks descending for certain {@link #PROPERTY_NAME properties} */
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TaskQuery orderDesc(String property);
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/** execute a count(*) query and returns number of results */
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long count();
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/** execute the query and obtain the list of {@link Task}s */
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List<Task> list();
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/** execute the query and obtain the unique {@link Task} */
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Task uniqueResult();
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}
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