/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.pvm.internal.wire.binding;
import java.util.List;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import org.jbpm.pvm.internal.script.ScriptManager;
import org.jbpm.pvm.internal.util.ReflectUtil;
import org.jbpm.pvm.internal.util.XmlUtil;
import org.jbpm.pvm.internal.wire.descriptor.ObjectDescriptor;
import org.jbpm.pvm.internal.wire.descriptor.ProvidedObjectDescriptor;
import org.jbpm.pvm.internal.wire.descriptor.StringDescriptor;
import org.jbpm.pvm.internal.xml.Parse;
import org.jbpm.pvm.internal.xml.Parser;
import org.w3c.dom.Element;
/**
* @author Tom Baeyens
*/
public class ScriptManagerBinding extends WireDescriptorBinding {
public ScriptManagerBinding() {
super("script-manager");
}
public Object parse(Element element, Parse parse, Parser parser) {
ObjectDescriptor descriptor = new ObjectDescriptor(ScriptManager.class);
if (element.hasAttribute("default-expression-language")) {
String defaultLanguage = element.getAttribute("default-expression-language");
descriptor.addInjection("defaultExpressionLanguage", new StringDescriptor(defaultLanguage));
}
if (element.hasAttribute("default-script-language")) {
String defaultLanguage = element.getAttribute("default-script-language");
descriptor.addInjection("defaultScriptLanguage", new StringDescriptor(defaultLanguage));
}
ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
List<Element> scriptElements = XmlUtil.elements(element, "script-language");
for (Element scriptElement : scriptElements) {
String languageName = null;
if (scriptElement.hasAttribute("name")) {
languageName = scriptElement.getAttribute("name");
} else {
parse.addProblem("'name' is a required attribute in element <script-language />", element);
}
String factoryClassName = null;
if (scriptElement.hasAttribute("factory")) {
factoryClassName = scriptElement.getAttribute("factory");
} else {
parse.addProblem("'name' is a required attribute in element <script-language />", element);
}
if ( (languageName!=null)
&& (factoryClassName!=null)
) {
try {
Class<?> factoryClass = ReflectUtil.loadClass(parse.getClassLoader(), factoryClassName);
ScriptEngineFactory scriptEngineFactory = (ScriptEngineFactory) factoryClass.newInstance();
scriptEngineManager.registerEngineName(languageName, scriptEngineFactory);
} catch (Exception e) {
parse.addProblem("couldn't instantiate ScriptEngineFactory "+factoryClassName, e);
}
}
}
descriptor.addInjection("scriptEngineManager", new ProvidedObjectDescriptor(scriptEngineManager));
return descriptor;
}
}