/*
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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.jpdl.internal.activity;
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import org.hibernate.Query;
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import org.hibernate.Session;
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import org.jbpm.api.JbpmException;
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import org.jbpm.api.model.OpenExecution;
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import org.jbpm.internal.log.Log;
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import org.jbpm.pvm.internal.env.EnvironmentImpl;
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import org.jbpm.pvm.internal.wire.Descriptor;
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import org.jbpm.pvm.internal.wire.WireContext;
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import org.jbpm.pvm.internal.wire.descriptor.ListDescriptor;
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/**
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* @author Tom Baeyens
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*/
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public class HqlActivity extends JpdlAutomaticActivity {
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private static final Log log = Log.getLog(HqlActivity.class.getName());
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private static final long serialVersionUID = 1L;
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protected String query;
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protected ListDescriptor parametersDescriptor;
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protected String resultVariableName;
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protected boolean isResultUnique;
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public void perform(OpenExecution execution) {
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EnvironmentImpl environment = EnvironmentImpl.getCurrent();
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if (environment==null) {
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throw new JbpmException("no environment for jpdl activity "+HqlBinding.TAG);
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}
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Session session = environment.get(Session.class);
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Query q = createQuery(session);
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if (parametersDescriptor!=null) {
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for (Descriptor valueDescriptor: parametersDescriptor.getValueDescriptors()) {
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String parameterName = valueDescriptor.getName();
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Object value = WireContext.create(valueDescriptor);
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applyParameter(q, parameterName, value);
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}
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}
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Object result = null;
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if (isResultUnique) {
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result = q.uniqueResult();
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} else {
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result = q.list();
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}
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execution.setVariable(resultVariableName, result);
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}
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protected Query createQuery(Session session) {
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return session.createQuery(query);
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}
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public void applyParameter(Query q, String parameterName, Object value) {
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if (value instanceof String) {
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q.setString(parameterName, (String) value);
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} else if (value instanceof Long) {
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q.setLong(parameterName, (Long) value);
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} else {
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log.error("unknown hql parameter type: "+value.getClass().getName());
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}
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}
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public void setQuery(String query) {
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this.query = query;
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}
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public void setParametersDescriptor(ListDescriptor parametersDescriptor) {
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this.parametersDescriptor = parametersDescriptor;
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}
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public void setResultUnique(boolean isResultUnique) {
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this.isResultUnique = isResultUnique;
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}
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public void setResultVariableName(String resultVariableName) {
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this.resultVariableName = resultVariableName;
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}
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}
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