/* * 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.configuration; import java.io.InputStream; import java.io.Serializable; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.jbpm.JbpmException; import org.jbpm.util.XmlUtil; import org.w3c.dom.Document; import org.w3c.dom.Element; public class ObjectFactoryParser implements Serializable { private static final long serialVersionUID = 1L; private static final Class[] constructorParameterTypes = { Element.class, ObjectFactoryParser.class }; private static final Map defaultMappings = getDefaultMappings(); public static Map getDefaultMappings() { Map mappings = new HashMap(); addMapping(mappings, "bean", BeanInfo.class); addMapping(mappings, "ref", RefInfo.class); addMapping(mappings, "list", ListInfo.class); addMapping(mappings, "set", SetInfo.class); addMapping(mappings, "map", MapInfo.class); addMapping(mappings, "string", StringInfo.class); addMapping(mappings, "int", IntegerInfo.class); addMapping(mappings, "integer", IntegerInfo.class); addMapping(mappings, "long", LongInfo.class); addMapping(mappings, "float", FloatInfo.class); addMapping(mappings, "double", DoubleInfo.class); addMapping(mappings, "char", CharacterInfo.class); addMapping(mappings, "character", CharacterInfo.class); addMapping(mappings, "boolean", BooleanInfo.class); addMapping(mappings, "true", BooleanInfo.class); addMapping(mappings, "false", BooleanInfo.class); addMapping(mappings, "null", NullInfo.class); addMapping(mappings, "jbpm-context", JbpmContextInfo.class); addMapping(mappings, "jbpm-type", JbpmTypeObjectInfo.class); return mappings; } private static void addMapping(Map mappings, String elementTagName, Class objectInfoClass) { try { Constructor constructor = objectInfoClass.getDeclaredConstructor(constructorParameterTypes); mappings.put(elementTagName, constructor); } catch (NoSuchMethodException e) { throw new JbpmException("could not add mapping for element '" + elementTagName + "', constructor(" + Element.class.getName() + "," + ObjectFactoryParser.class.getName() + ") missing from " + objectInfoClass, e); } } public static ObjectFactoryImpl parseXmlString(String xml) { return createObjectFactory(XmlUtil.parseXmlText(xml)); } public static ObjectFactoryImpl parseInputStream(InputStream inputStream) { return createObjectFactory(XmlUtil.parseXmlInputStream(inputStream)); } public static ObjectFactoryImpl parseResource(String resource) { return createObjectFactory(XmlUtil.parseXmlResource(resource, false)); } private static ObjectFactoryImpl createObjectFactory(Document document) { return createObjectFactory(document.getDocumentElement()); } public static ObjectFactoryImpl createObjectFactory(Element infosElement) { ObjectFactoryParser parser = new ObjectFactoryParser(); for (Iterator iter = XmlUtil.elementIterator(infosElement); iter.hasNext();) { Element infoElement = (Element) iter.next(); parser.parse(infoElement); } return new ObjectFactoryImpl(parser.namedObjectInfos); } public void parseElementsFromResource(String resource, ObjectFactoryImpl objectFactory) { parseElements(XmlUtil.parseXmlResource(resource, false), objectFactory); } public void parseElementsStream(InputStream inputStream, ObjectFactoryImpl objectFactory) { parseElements(XmlUtil.parseXmlInputStream(inputStream), objectFactory); } private void parseElements(Document document, ObjectFactoryImpl objectFactory) { parseElements(document.getDocumentElement(), objectFactory); } public void parseElements(Element infosElement, ObjectFactoryImpl objectFactory) { for (Iterator iter = XmlUtil.elementIterator(infosElement); iter.hasNext();) { Element infoElement = (Element) iter.next(); ObjectInfo objectInfo = parse(infoElement); objectFactory.addObjectInfo(objectInfo); } } private Map mappings; private final Map namedObjectInfos = new HashMap(); public ObjectFactoryParser() { this(getDefaultMappings()); } public ObjectFactoryParser(Map mappings) { this.mappings = mappings; } public ObjectInfo parse(Element element) { String tagName = element.getTagName().toLowerCase(); Constructor constructor = (Constructor) mappings.get(tagName); if (constructor == null) { throw new JbpmException("no ObjectInfo class specified for element: " + tagName); } try { ObjectInfo objectInfo = (ObjectInfo) constructor.newInstance(new Object[] { element, this }); if (objectInfo.hasName()) addNamedObjectInfo(objectInfo.getName(), objectInfo); return objectInfo; } catch (InstantiationException e) { throw new JbpmException("failed to instantiate " + constructor.getDeclaringClass(), e); } catch (IllegalAccessException e) { throw new JbpmException(getClass() + " has no access to " + constructor, e); } catch (InvocationTargetException e) { throw new JbpmException(constructor + " threw exception", e); } } public void addNamedObjectInfo(String name, ObjectInfo objectInfo) { namedObjectInfos.put(name, objectInfo); } public void addMapping(String elementName, Class objectInfoClass) { if (mappings == defaultMappings) mappings = new HashMap(defaultMappings); addMapping(mappings, elementName, objectInfoClass); } }