/**
* JCL (Jar Class Loader)
*
* Copyright (C) 2009 Xeus Technologies
*
* This file is part of Jar Class Loader (JCL).
* Jar Class Loader (JCL) 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.
*
* JarClassLoader 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 JCL. If not, see <http://www.gnu.org/licenses/>.
*
* @author Kamran Zafar
*
* Contact Info:
* Email: xeus.man@gmail.com
* Web: http://xeustech.blogspot.com
*/
package xeus.jcl;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import xeus.jcl.exception.JclException;
@SuppressWarnings("unchecked")
public class JclUtils {
/**
* Casts the object ref to the passed interface class ref. It actually
* returns a dynamic proxy for the passed object
*
* @param object
* @param classes
* @return castable
* @return casted
*/
public static Object toCastable(Object object, Class[] classes) {
JclProxyHandler handler = new JclProxyHandler( object );
return Proxy.newProxyInstance( JclUtils.class.getClassLoader(), classes, handler );
}
/**
* Casts the object ref to the passed interface class ref
*
* @param object
* @param clazz
* @return castable
* @return casted
*/
public static Object toCastable(Object object, Class clazz) {
return toCastable( object, new Class[] { clazz } );
}
/**
* Casts the object ref to the passed interface class ref and returns it
*
* @param object
* @param clazz
* @return T reference
* @return casted
*/
public static <T> T cast(Object object, Class<T> clazz) {
return (T) toCastable( object, clazz );
}
/**
* Deep clones the Serializable objects in the current classloader
*
* @param original
* @return clone
*/
public static Object clone(Object original) {
Object clone = null;
try {
// Increased buffer size to speed up writing
ByteArrayOutputStream bos = new ByteArrayOutputStream( 5120 );
ObjectOutputStream out = new ObjectOutputStream( bos );
out.writeObject( original );
out.flush();
out.close();
ObjectInputStream in = new ObjectInputStream( new ByteArrayInputStream( bos.toByteArray() ) );
clone = in.readObject();
in.close();
bos.close();
return clone;
} catch (IOException e) {
throw new JclException( e );
} catch (ClassNotFoundException cnfe) {
throw new JclException( cnfe );
}
}
/**
* proxy method invocation handler
*
*/
private static class JclProxyHandler implements InvocationHandler {
private final Object delegate;
public JclProxyHandler(Object delegate) {
this.delegate = delegate;
}
/*
* (non-Javadoc)
*
* @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object,
* java.lang.reflect.Method, java.lang.Object[])
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
Method delegateMethod = delegate.getClass().getMethod( method.getName(), method.getParameterTypes() );
return delegateMethod.invoke( delegate, args );
}
}
}