001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.xbean.spring.context.v2;
018
019import java.lang.reflect.Constructor;
020
021import org.springframework.beans.factory.config.BeanDefinition;
022import org.springframework.beans.factory.xml.BeanDefinitionParserDelegate;
023import org.springframework.beans.factory.xml.NamespaceHandler;
024import org.springframework.beans.factory.xml.XmlReaderContext;
025import org.w3c.dom.Element;
026
027public class XBeanV2Helper {
028    
029    public static String version = null;
030
031    public static BeanDefinitionParserDelegate createParser(XmlReaderContext readerContext) {
032        try {
033            String className = "org.apache.xbean.spring.context." + getVersion() + ".XBeanBeanDefinitionParserDelegate";
034            Class clParser = Class.forName(className);
035            Constructor cns = clParser.getConstructor(new Class[] { XmlReaderContext.class });
036            return (BeanDefinitionParserDelegate) cns.newInstance(new Object[] { readerContext });
037        } catch (Throwable e) {
038            throw (IllegalStateException) new IllegalStateException("Unable to create namespace handler for: " + version).initCause(e);
039        }
040    }
041    
042    public static NamespaceHandler createNamespaceHandler() {
043        try {
044            String className = "org.apache.xbean.spring.context." + getVersion() + ".XBeanNamespaceHandler";
045            Class clHandler = Class.forName(className);
046            return (NamespaceHandler) clHandler.newInstance();
047        } catch (Throwable e) {
048            throw (IllegalStateException) new IllegalStateException("Unable to create namespace handler for: " + version).initCause(e);
049        }
050    }
051    
052    private static String getVersion() {
053        if (version == null) {
054            try {
055                try {
056                    Class.forName("org.springframework.beans.factory.parsing.BeanComponentDefinition");
057                    version = "v2c";
058                } catch (ClassNotFoundException e) {
059                    Class cl = Class.forName("org.springframework.beans.factory.xml.BeanDefinitionParserDelegate");
060                    try {
061                        cl.getMethod("parsePropertyElements", new Class[] { Element.class, BeanDefinition.class });
062                        version = "v2b";
063                    } catch (NoSuchMethodException e2) {
064                        version = "v2a";
065                    }
066                }
067            } catch (Throwable e) {
068                throw (IllegalStateException) new IllegalStateException("Could not create namespace handler for: " + version).initCause(e);
069            }
070        }
071        return version;
072    }
073}