/*
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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.convert.node;
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import java.io.InputStream;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.dom4j.DocumentException;
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import org.dom4j.Element;
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import org.dom4j.io.SAXReader;
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/**
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* This originates from jbpm3 code base
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*
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* Basically, it maps a type string to a Node class.
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*/
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public class NodeConverterTypes {
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public static Set<String> getNodeTypes() {
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return nodeTypes.keySet();
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}
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public static Set<Class<? extends Node>> getNodeNames() {
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return nodeNames.keySet();
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}
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public static Class<? extends Node> getNodeType(String name) {
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return nodeTypes.get(name);
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}
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public static String getNodeName(Class<? extends Node> type) {
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return nodeNames.get(type);
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}
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private static final Log log = LogFactory.getLog(NodeConverterTypes.class);
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private static SAXReader reader = new SAXReader();
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static Map<String, Class<? extends Node>> nodeTypes = initialiseNodeTypes();
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static Map<Class<? extends Node>, String> nodeNames = createInverseMapping(nodeTypes);
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static Map<String, Class<? extends Node>> initialiseNodeTypes() {
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Map<String, Class<? extends Node>> types = new HashMap<String, Class<? extends Node>>();
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InputStream nodeTypesStream = NodeConverterTypes.class.getClassLoader().getResourceAsStream("node.converter.types.xml");
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Element nodeTypesElement = null;
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try {
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nodeTypesElement = reader.read(nodeTypesStream).getRootElement();
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} catch (DocumentException e1) {
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log.error("Failed to parse the node.converter.types.xml", e1);
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}
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Iterator<?> nodeTypeIterator = nodeTypesElement.elementIterator("node-type");
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while(nodeTypeIterator.hasNext()) {
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Element nodeTypeElement = (Element) nodeTypeIterator.next();
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String elementTag = nodeTypeElement.attributeValue("element");
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String className = nodeTypeElement.attributeValue("class");
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try {
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Class<?> nodeClass = NodeConverterTypes.class.forName(className);
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types.put(elementTag, nodeClass.asSubclass(Node.class));
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} catch (Exception e) {
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if (!"org.jboss.seam.jbpm.Page".equals(className)) {
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if(log.isDebugEnabled())
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{
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log.debug("node '"+elementTag+"' will not be available. class '"+className+"' couldn't be loaded");
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}
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}
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}
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}
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return types;
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}
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public static <K, V> Map<V, K> createInverseMapping(Map<K, V> map) {
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Map<V, K> inverse = new HashMap<V, K>();
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for (Map.Entry<K, V> entry : map.entrySet()) {
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inverse.put(entry.getValue(), entry.getKey());
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}
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return inverse;
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}
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}
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