| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.impl; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| |
| /** |
| * WebSphere specific resolver to handle loading annotated resources in JAR files. |
| */ |
| public class WebSpherePackageScanClassResolver extends DefaultPackageScanClassResolver { |
| |
| private final String resourcePath; |
| |
| /** |
| * Constructor. |
| * |
| * @param resourcePath the fixed resource path to use for fetching camel jars in WebSphere. |
| */ |
| public WebSpherePackageScanClassResolver(String resourcePath) { |
| this.resourcePath = resourcePath; |
| } |
| |
| /** |
| * Is the classloader from IBM and thus the WebSphere platform? |
| * |
| * @param loader the classloader |
| * @return <tt>true</tt> if IBM classloader, <tt>false</tt> otherwise. |
| */ |
| public static boolean isWebSphereClassLoader(ClassLoader loader) { |
| return loader.getClass().getName().startsWith("com.ibm"); |
| } |
| |
| /** |
| * Overloaded to handle specific problem with getting resources on the IBM WebSphere platform. |
| * <p/> |
| * WebSphere can <b>not</b> load resources if the resource to load is a folder name, such as a |
| * packagename, you have to explicit name a resource that is a file. |
| * |
| * @param loader the classloader |
| * @param packageName the packagename for the package to load |
| * @return URL's for the given package |
| * @throws java.io.IOException is thrown by the classloader |
| */ |
| @Override |
| protected Enumeration<URL> getResources(ClassLoader loader, String packageName) throws IOException { |
| // try super first, just in vase |
| Enumeration<URL> enumeration = super.getResources(loader, packageName); |
| if (!enumeration.hasMoreElements()) { |
| log.trace("Using WebSphere workaround to load the camel jars with the annotated converters."); |
| // Special WebSphere trick to load a file that exists in the JAR and then let it go from there. |
| // The trick is that we just need the URL's for the .jars that contains the type |
| // converters that is annotated. So by searching for this resource WebSphere is able to find |
| // it and return the URL to the .jar file with the resource. Then the DefaultPackageScanClassResolver |
| // can take it from there and find the classes that are annotated. |
| enumeration = loader.getResources(resourcePath); |
| } |
| |
| return enumeration; |
| } |
| |
| } |