/*
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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.pvm.internal.wire.binding;
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import java.util.List;
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import javax.script.ScriptEngineFactory;
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import javax.script.ScriptEngineManager;
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import org.jbpm.pvm.internal.script.ScriptManager;
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import org.jbpm.pvm.internal.util.ReflectUtil;
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import org.jbpm.pvm.internal.util.XmlUtil;
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import org.jbpm.pvm.internal.wire.descriptor.ObjectDescriptor;
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import org.jbpm.pvm.internal.wire.descriptor.ProvidedObjectDescriptor;
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import org.jbpm.pvm.internal.wire.descriptor.StringDescriptor;
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import org.jbpm.pvm.internal.xml.Parse;
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import org.jbpm.pvm.internal.xml.Parser;
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import org.w3c.dom.Element;
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/**
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* @author Tom Baeyens
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*/
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public class ScriptManagerBinding extends WireDescriptorBinding {
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public ScriptManagerBinding() {
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super("script-manager");
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}
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public Object parse(Element element, Parse parse, Parser parser) {
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ObjectDescriptor descriptor = new ObjectDescriptor(ScriptManager.class);
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if (element.hasAttribute("default-expression-language")) {
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String defaultLanguage = element.getAttribute("default-expression-language");
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descriptor.addInjection("defaultExpressionLanguage", new StringDescriptor(defaultLanguage));
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}
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if (element.hasAttribute("default-script-language")) {
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String defaultLanguage = element.getAttribute("default-script-language");
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descriptor.addInjection("defaultScriptLanguage", new StringDescriptor(defaultLanguage));
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}
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ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
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List<Element> scriptElements = XmlUtil.elements(element, "script-language");
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for (Element scriptElement : scriptElements) {
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String languageName = null;
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if (scriptElement.hasAttribute("name")) {
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languageName = scriptElement.getAttribute("name");
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} else {
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parse.addProblem("'name' is a required attribute in element <script-language />", element);
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}
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String factoryClassName = null;
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if (scriptElement.hasAttribute("factory")) {
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factoryClassName = scriptElement.getAttribute("factory");
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} else {
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parse.addProblem("'name' is a required attribute in element <script-language />", element);
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}
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if ( (languageName!=null)
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&& (factoryClassName!=null)
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) {
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try {
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ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
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Class<?> factoryClass = Class.forName(factoryClassName, true, classLoader);
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ScriptEngineFactory scriptEngineFactory = (ScriptEngineFactory) factoryClass.newInstance();
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scriptEngineManager.registerEngineName(languageName, scriptEngineFactory);
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} catch (Exception e) {
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parse.addProblem("couldn't instantiate ScriptEngineFactory "+factoryClassName, e);
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}
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}
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}
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descriptor.addInjection("scriptEngineManager", new ProvidedObjectDescriptor(scriptEngineManager));
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return descriptor;
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}
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}
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