/*
* 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.brooklyn.core.mgmt.classloading;
import java.net.URL;
import org.apache.brooklyn.api.mgmt.classloading.BrooklynClassLoadingContext;
public class ClassLoaderFromBrooklynClassLoadingContext extends ClassLoader {
/** Constructs a {@link ClassLoader} which delegates to the given {@link BrooklynClassLoadingContext} */
public static ClassLoader of(BrooklynClassLoadingContext clc) {
return new ClassLoaderFromBrooklynClassLoadingContext(clc);
}
protected final BrooklynClassLoadingContext clc;
protected ClassLoaderFromBrooklynClassLoadingContext(BrooklynClassLoadingContext clc) {
this.clc = clc;
}
@Override
public Class<?> findClass(String className) throws ClassNotFoundException {
Class<?> result = clc.loadClass(className);
if (result!=null) return result;
// last resort. see comment in XStream CompositeClassLoader
ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
if (contextClassLoader != null) {
result = contextClassLoader.loadClass(className);
if (result!=null) return result;
}
return null;
}
@Override
protected URL findResource(String name) {
URL result = clc.getResource(name);
if (result!=null) return result;
// last resort. see comment in XStream CompositeClassLoader
ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
if (contextClassLoader != null) {
result = contextClassLoader.getResource(name);
if (result!=null) return result;
}
return null;
}
}