scouter.javassist.util.proxy.SerializedProxy Maven / Gradle / Ivy
/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package scouter.javassist.util.proxy;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import scouter.javassist.util.proxy.MethodHandler;
import scouter.javassist.util.proxy.Proxy;
import scouter.javassist.util.proxy.ProxyFactory;
import scouter.javassist.util.proxy.ProxyObject;
import scouter.javassist.util.proxy.RuntimeSupport;
/**
* A proxy object is converted into an instance of this class
* when it is written to an output stream.
*
* @see RuntimeSupport#makeSerializedProxy(Object)
*/
class SerializedProxy implements Serializable {
private String superClass;
private String[] interfaces;
private byte[] filterSignature;
private MethodHandler handler;
SerializedProxy(Class proxy, byte[] sig, MethodHandler h) {
filterSignature = sig;
handler = h;
superClass = proxy.getSuperclass().getName();
Class[] infs = proxy.getInterfaces();
int n = infs.length;
interfaces = new String[n - 1];
String setterInf = ProxyObject.class.getName();
String setterInf2 = Proxy.class.getName();
for (int i = 0; i < n; i++) {
String name = infs[i].getName();
if (!name.equals(setterInf) && !name.equals(setterInf2))
interfaces[i] = name;
}
}
/**
* Load class.
*
* @param className the class name
* @return loaded class
* @throws ClassNotFoundException for any error
*/
protected Class loadClass(final String className) throws ClassNotFoundException {
try {
return (Class)AccessController.doPrivileged(new PrivilegedExceptionAction(){
public Object run() throws Exception{
ClassLoader cl = Thread.currentThread().getContextClassLoader();
return Class.forName(className, true, cl);
}
});
}
catch (PrivilegedActionException pae) {
throw new RuntimeException("cannot load the class: " + className, pae.getException());
}
}
Object readResolve() throws ObjectStreamException {
try {
int n = interfaces.length;
Class[] infs = new Class[n];
for (int i = 0; i < n; i++)
infs[i] = loadClass(interfaces[i]);
ProxyFactory f = new ProxyFactory();
f.setSuperclass(loadClass(superClass));
f.setInterfaces(infs);
Proxy proxy = (Proxy)f.createClass(filterSignature).newInstance();
proxy.setHandler(handler);
return proxy;
}
catch (ClassNotFoundException e) {
throw new java.io.InvalidClassException(e.getMessage());
}
catch (InstantiationException e2) {
throw new java.io.InvalidObjectException(e2.getMessage());
}
catch (IllegalAccessException e3) {
throw new java.io.InvalidClassException(e3.getMessage());
}
}
}