com.feilong.lib.javassist.util.proxy.RuntimeSupport Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of feilong Show documentation
Show all versions of feilong Show documentation
feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.
/*
* 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 com.feilong.lib.javassist.util.proxy;
import java.io.Serializable;
import java.lang.reflect.Method;
/**
* Runtime support routines that the classes generated by ProxyFactory use.
*
* @see ProxyFactory
*/
public class RuntimeSupport{
/**
* A method handler that only executes a method.
*/
public static MethodHandler default_interceptor = new DefaultMethodHandler();
static class DefaultMethodHandler implements MethodHandler,Serializable{
/** default serialVersionUID */
private static final long serialVersionUID = 1L;
@Override
public Object invoke(Object self,Method m,Method proceed,Object[] args) throws Exception{
return proceed.invoke(self, args);
}
}
/**
* Finds two methods specified by the parameters and stores them
* into the given array.
*
* @throws RuntimeException
* if the methods are not found.
* @see com.feilong.lib.javassist.util.proxy.ProxyFactory
*/
public static void find2Methods(
Class clazz,
String superMethod,
String thisMethod,
int index,
String desc,
java.lang.reflect.Method[] methods){
methods[index + 1] = thisMethod == null ? null : findMethod(clazz, thisMethod, desc);
methods[index] = findSuperClassMethod(clazz, superMethod, desc);
}
/**
* Finds two methods specified by the parameters and stores them
* into the given array.
*
*
* Added back for JBoss Seam. See JASSIST-206.
*
*
* @throws RuntimeException
* if the methods are not found.
* @see com.feilong.lib.javassist.util.proxy.ProxyFactory
* @deprecated replaced by {@link #find2Methods(Class, String, String, int, String, Method[])}
*/
@Deprecated
public static void find2Methods(
Object self,
String superMethod,
String thisMethod,
int index,
String desc,
java.lang.reflect.Method[] methods){
methods[index + 1] = thisMethod == null ? null : findMethod(self, thisMethod, desc);
methods[index] = findSuperMethod(self, superMethod, desc);
}
/**
* Finds a method with the given name and descriptor.
* It searches only the class of self.
*
*
* Added back for JBoss Seam. See JASSIST-206.
*
*
* @throws RuntimeException
* if the method is not found.
* @deprecated replaced by {@link #findMethod(Class, String, String)}
*/
@Deprecated
public static Method findMethod(Object self,String name,String desc){
Method m = findMethod2(self.getClass(), name, desc);
if (m == null){
error(self.getClass(), name, desc);
}
return m;
}
/**
* Finds a method with the given name and descriptor.
* It searches only the class of self.
*
* @throws RuntimeException
* if the method is not found.
*/
public static Method findMethod(Class clazz,String name,String desc){
Method m = findMethod2(clazz, name, desc);
if (m == null){
error(clazz, name, desc);
}
return m;
}
/**
* Finds a method that has the given name and descriptor and is declared
* in the super class.
*
* @throws RuntimeException
* if the method is not found.
*/
public static Method findSuperMethod(Object self,String name,String desc){
// for JBoss Seam. See JASSIST-183.
Class clazz = self.getClass();
return findSuperClassMethod(clazz, name, desc);
}
/**
* Finds a method that has the given name and descriptor and is declared
* in the super class.
*
* @throws RuntimeException
* if the method is not found.
*/
public static Method findSuperClassMethod(Class clazz,String name,String desc){
Method m = findSuperMethod2(clazz.getSuperclass(), name, desc);
if (m == null){
m = searchInterfaces(clazz, name, desc);
}
if (m == null){
error(clazz, name, desc);
}
return m;
}
private static void error(Class clazz,String name,String desc){
throw new RuntimeException("not found " + name + ":" + desc + " in " + clazz.getName());
}
private static Method findSuperMethod2(Class clazz,String name,String desc){
Method m = findMethod2(clazz, name, desc);
if (m != null){
return m;
}
Class superClass = clazz.getSuperclass();
if (superClass != null){
m = findSuperMethod2(superClass, name, desc);
if (m != null){
return m;
}
}
return searchInterfaces(clazz, name, desc);
}
private static Method searchInterfaces(Class clazz,String name,String desc){
Method m = null;
Class[] interfaces = clazz.getInterfaces();
for (Class interface1 : interfaces){
m = findSuperMethod2(interface1, name, desc);
if (m != null){
return m;
}
}
return m;
}
private static Method findMethod2(Class clazz,String name,String desc){
Method[] methods = SecurityActions.getDeclaredMethods(clazz);
int n = methods.length;
for (int i = 0; i < n; i++){
if (methods[i].getName().equals(name) && makeDescriptor(methods[i]).equals(desc)){
return methods[i];
}
}
return null;
}
/**
* Makes a descriptor for a given method.
*/
public static String makeDescriptor(Method m){
Class[] params = m.getParameterTypes();
return makeDescriptor(params, m.getReturnType());
}
/**
* Makes a descriptor for a given method.
*
* @param params
* parameter types.
* @param retType
* return type.
*/
public static String makeDescriptor(Class[] params,Class retType){
StringBuffer sbuf = new StringBuffer();
sbuf.append('(');
for (Class param : params){
makeDesc(sbuf, param);
}
sbuf.append(')');
if (retType != null){
makeDesc(sbuf, retType);
}
return sbuf.toString();
}
/**
* Makes a descriptor for a given method.
*
* @param params
* the descriptor of parameter types.
* @param retType
* return type.
*/
public static String makeDescriptor(String params,Class retType){
StringBuffer sbuf = new StringBuffer(params);
makeDesc(sbuf, retType);
return sbuf.toString();
}
private static void makeDesc(StringBuffer sbuf,Class type){
if (type.isArray()){
sbuf.append('[');
makeDesc(sbuf, type.getComponentType());
}else if (type.isPrimitive()){
if (type == Void.TYPE){
sbuf.append('V');
}else if (type == Integer.TYPE){
sbuf.append('I');
}else if (type == Byte.TYPE){
sbuf.append('B');
}else if (type == Long.TYPE){
sbuf.append('J');
}else if (type == Double.TYPE){
sbuf.append('D');
}else if (type == Float.TYPE){
sbuf.append('F');
}else if (type == Character.TYPE){
sbuf.append('C');
}else if (type == Short.TYPE){
sbuf.append('S');
}else if (type == Boolean.TYPE){
sbuf.append('Z');
}else{
throw new RuntimeException("bad type: " + type.getName());
}
}else{
sbuf.append('L').append(type.getName().replace('.', '/')).append(';');
}
}
/**
* Converts a proxy object to an object that is writable to an
* object stream. This method is called by writeReplace()
* in a proxy class.
*
* @since 3.4
*/
public static SerializedProxy makeSerializedProxy(Object proxy) throws java.io.InvalidClassException{
Class clazz = proxy.getClass();
MethodHandler methodHandler = null;
if (proxy instanceof ProxyObject){
methodHandler = ((ProxyObject) proxy).getHandler();
}else if (proxy instanceof Proxy){
methodHandler = ProxyFactory.getHandler((Proxy) proxy);
}
return new SerializedProxy(clazz, ProxyFactory.getFilterSignature(clazz), methodHandler);
}
}