org.frameworkset.util.asm.AsmUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of bboss-util Show documentation
Show all versions of bboss-util Show documentation
bboss is a j2ee framework include aop/ioc,mvc,persistent,taglib,rpc,event ,bean-xml serializable and so on.http://www.bbossgroups.com
/*
* Copyright 2008 biaoping.yin
*
* Licensed 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.frameworkset.util.asm;
import java.util.List;
import org.frameworkset.util.ClassUtil.PropertieDescription;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import bboss.org.objectweb.asm.ClassReader;
import bboss.org.objectweb.asm.ClassWriter;
/**
* Title: AsmUtil.java
* Description:
* bboss workgroup
* Copyright (c) 2008
* @Date 2011-12-29
* @author biaoping.yin
* @version 1.0
*/
public class AsmUtil {
private static final ASMClassLoader classLoader = new ASMClassLoader();
private static final Logger log = LoggerFactory.getLogger(AsmUtil.class);
public static final String bboss_field_getMethod_prex = "___bboss_pull";
public static final String bboss_field_setMethod_prex = "___bboss_put";
// public static class MethodNode
// {
// String field
// }
// public static Method addFieldWriteMethodToClass(Class clazz,Field field) throws IOException
// {
// ClassWriter cw = new ClassWriter(new ClassReader(clazz.getCanonicalName()),0);
// CheckClassAdapter ca = new CheckClassAdapter(cw);
// AddMethodAdaptor am = new AddMethodAdaptor(ca);
//
// }
public static Class addGETSETMethodForClass(List propertieDescriptionies,Class beanType)
{
String className = beanType.getName();
try {
// String className = beanType.getName();
ClassReader cr = new ClassReader(className);
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
cr.accept(new ASMPUTGETFieldAdapter(cw,beanType,propertieDescriptionies),0);
beanType = classLoader.defineClass(className, cw.toByteArray());
return beanType;
// Method temp = beanType.getMethod(AsmUtil.bboss_field_getMethod_prex + "Age");
} catch (Exception e) {
log.error("Add field's GET/SET Method For ["+className+"] failed:",e);
return beanType;
}
}
// public static void main(String[] args) throws IOException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, ClassNotFoundException, InstantiationException
// {
//// ClassReader reader = new ClassReader("java.lang.String");
//// reader.accept(new MyClassVisitor(), 0);
//
// Foo foo = new Foo();
// foo.execute("duoduo","中国");
//
// ClassReader cr = new ClassReader(Foo.class.getName());
// ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
// cr.accept(new ClassAdapter(cw,Opcodes.ASM4){
//
// @Override
// public void visit(int version, int access, String name,
// String signature, String superName, String[] interfaces) {
// // TODO Auto-generated method stub
// super.visit(version, access, name, signature, superName, interfaces);
// }
//
// @Override
// public MethodVisitor visitMethod(int access, String name,
// String desc, String signature, String[] exceptions) {
// // TODO Auto-generated method stub
// if(name.equals("execute"))
// {
// return cv.visitMethod(access, name+"$bboss1", desc, signature, exceptions);
// }
// else
// {
// return cv.visitMethod(access, name, desc, signature, exceptions);
// }
// }
//
// @Override
// public FieldVisitor visitField(int access, String name,
// String desc, String signature, Object value) {
// if(name.equals("age"))
// {
// /**
// * //我们接着需要增加一个execute方法
// MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "execute",
// "()V", null,
// null);
// //开始增加代码
// mv.visitCode();
// //接下来，我们需要把新的execute方法的内容，增加到这个方法中
// mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
// mv.visitLdcInsn("Before execute");
// mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
// mv.visitVarInsn(Opcodes.ALOAD, 0);
// mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "org/vanadies/bytecode/example/asm3/ClassWriterAopExample$Foo$1", "execute$1", "()V");
// mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
// mv.visitLdcInsn("End execute");
// mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
// mv.visitInsn(Opcodes.RETURN);
// mv.visitMaxs(0, 0); //这个地方，最大的操作数栈和最大的本地变量的空间，是自动计算的，是因为构造ClassWriter的时候使用了ClassWriter.COMPUTE_MAXS
// mv.visitEnd();
// //到这里，就完成了execute方法的添加。
//
// */
// String className = Foo.class.getName();
// className = className.replace(".", "/");
// //我们接着需要增加一个execute方法
// String getMd = new StringBuilder(6).append("get")
// .append(Character.toTitleCase(name.charAt(0)))
// .append(name.substring(1))
// .toString();
//
// String setMd = new StringBuilder(6).append("set")
// .append(Character.toTitleCase(name.charAt(0)))
// .append(name.substring(1))
// .toString();
//
// MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, getMd,
// "()" + desc, null,
// null);
//
//// mv = cw.visitMethod(ACC_PUBLIC, getMd, "()I", null, null);
// mv.visitCode();
// mv.visitVarInsn(Opcodes.ALOAD, 0);
// mv.visitFieldInsn(Opcodes.GETFIELD, className, name, desc);
// mv.visitInsn(Opcodes.ARETURN);
// mv.visitMaxs(1, 1);
// // mw.visitInsn(RETURN);
// // this code uses a maximum of two stack elements and two local
// // variables
// mv.visitEnd();
// mv = cv.visitMethod(Opcodes.ACC_PUBLIC, setMd,
// "("+desc+")V", null,
// null);
// mv.visitCode();
// mv.visitVarInsn(Opcodes.ALOAD, 0);
// mv.visitVarInsn(Opcodes.ALOAD, 1);
// mv.visitFieldInsn(Opcodes.PUTFIELD, className, name, desc);
// mv.visitInsn(Opcodes.RETURN);
// mv.visitMaxs(2, 2);
// // mw.visitInsn(RETURN);
// // this code uses a maximum of two stack elements and two local
// // variables
// mv.visitEnd();
//
// //到这里，就完成了execute方法的添加。
// }
// return super.visitField(access, name, desc, signature, value);
// }
//
//
//
// },0);
// TestClassLoader LOADER = new TestClassLoader();
// Class c = LOADER.defineClass(Foo.class.getName(), cw.toByteArray());
//// Class c = Class.forName(Foo.class.getName() +"_bboss1");
// Method m = c.getMethod("execute$bboss1",String.class,String.class);
// Method gage = c.getMethod("getAge");
// Method sage = c.getMethod("setAge",String.class);
// Object o = c.newInstance();
// sage.invoke(o, "18");
// m.invoke(c.newInstance(),"duoduo","中国");
// System.out.println(gage.invoke(o));
//
// }
// static class TestClassLoader extends ClassLoader {
//
// public Class defineClass(String name, byte[] b) {
// return defineClass(name, b, 0, b.length);
// }
// }
//
// public static class Foo
// {
// private String age;
// public String execute(String name,String country)
// {
// System.out.println("helloword:" + name);
// return "helloword:" + name;
// }
// }
//
// public static class MyClassVisitor extends ClassVisitor
// {
//
// public MyClassVisitor(int api) {
// super(api);
// // TODO Auto-generated constructor stub
// }
//
// public void visit(int arg0, int arg1, String arg2, String arg3,
// String arg4, String[] arg5) {
// System.out.println(arg2);
// System.out.println(arg3);
// System.out.println(arg4);
// }
//
// public AnnotationVisitor visitAnnotation(String arg0, boolean arg1) {
// // TODO Auto-generated method stub
// return null;
// }
//
// public void visitAttribute(Attribute arg0) {
// // TODO Auto-generated method stub
//
// }
//
// public void visitEnd() {
// // TODO Auto-generated method stub
//
// }
//
// public FieldVisitor visitField(int arg0, String arg1, String arg2,
// String arg3, Object arg4) {
// // TODO Auto-generated method stub
// return null;
// }
//
// public void visitInnerClass(String arg0, String arg1, String arg2,
// int arg3) {
// // TODO Auto-generated method stub
//
// }
//
// public MethodVisitor visitMethod(int arg0, String arg1, String arg2,
// String arg3, String[] arg4) {
// // TODO Auto-generated method stub
// return null;
// }
//
// public void visitOuterClass(String arg0, String arg1, String arg2) {
// // TODO Auto-generated method stub
//
// }
//
// public void visitSource(String arg0, String arg1) {
// // TODO Auto-generated method stub
//
// }
//
// }
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy