/*
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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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/** query for {@link ProcessInstance process instances}.
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*
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* @author Tom Baeyens
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*/
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public interface ProcessInstanceQuery {
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/** key property to be used as property in {@link #orderAsc(String)} and {@link #orderDesc(String)} */
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String PROPERTY_KEY = "key";
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/** select only process instances for the given process definition */
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ProcessInstanceQuery processDefinitionId(String processDefinitionId);
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/** select only a specific process instances using the process instance id */
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ProcessInstanceQuery processInstanceId(String processInstanceId);
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/** select only specific process instances using a business key */
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ProcessInstanceQuery processInstanceKey(String processInstanceKey);
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/** select only suspended process definitions */
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ProcessInstanceQuery suspended();
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/** select only process definitions that are not suspended */
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ProcessInstanceQuery notSuspended();
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/** order selected process instances ascending for certain {@link #PROPERTY_KEY properties} */
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ProcessInstanceQuery orderAsc(String property);
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/** order selected process instances descending for certain {@link #PROPERTY_KEY properties} */
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ProcessInstanceQuery orderDesc(String property);
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/** select a specific page in the result set */
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ProcessInstanceQuery page(int firstResult, int maxResults);
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/** execute the query and obtain the list of {@link ProcessInstance}s */
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List<ProcessInstance> list();
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/** execute the query and obtain the unique {@link ProcessInstance} */
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ProcessInstance uniqueResult();
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/** execute a count(*) query and returns number of results */
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long count();
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}
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