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/*
* SonarQube Runner - Implementation
* Copyright (C) 2011 SonarSource
* dev@sonar.codehaus.org
*
* This program 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 3 of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.runner.impl;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;
public class IsolatedLauncherProxy implements InvocationHandler {
private Object proxied = null;
private ClassLoader cl = null;
private IsolatedLauncherProxy(ClassLoader cl, Object proxied) {
this.cl = cl;
this.proxied = proxied;
}
public static <T> T create(ClassLoader cl, Class<T> interfaceClass, String proxiedClassName) throws ReflectiveOperationException {
Object proxied = createProxiedObject(cl, proxiedClassName);
// interfaceClass needs to be loaded with a parent ClassLoader (common to both ClassLoaders)
// In addition, Proxy.newProxyInstance checks if the target ClassLoader sees the same class as the one given
Class<?> loadedInterfaceClass = cl.loadClass(interfaceClass.getName());
return (T) create(cl, proxied, loadedInterfaceClass);
}
public static <T> T create(ClassLoader cl, Object proxied, Class<T> interfaceClass) {
Class<?>[] c = {interfaceClass};
return (T) Proxy.newProxyInstance(cl, c, new IsolatedLauncherProxy(cl, proxied));
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
ClassLoader initialContextClassLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(cl);
Logs.debug("Execution " + method.getName());
return method.invoke(proxied, args);
} catch (UndeclaredThrowableException | InvocationTargetException e) {
throw unwrapException(e);
} finally {
Thread.currentThread().setContextClassLoader(initialContextClassLoader);
}
}
private static Throwable unwrapException(Throwable e) {
Throwable cause = e;
while (cause.getCause() != null) {
if (cause instanceof UndeclaredThrowableException || cause instanceof InvocationTargetException) {
cause = cause.getCause();
} else {
break;
}
}
return cause;
}
private static Object createProxiedObject(ClassLoader cl, String proxiedClassName) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
Class<?> proxiedClass = cl.loadClass(proxiedClassName);
return proxiedClass.newInstance();
}
}
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