| package org.apache.maven.coreits.javaagent.mng5669; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.lang.instrument.ClassFileTransformer; |
| import java.lang.instrument.IllegalClassFormatException; |
| import java.lang.instrument.Instrumentation; |
| import java.security.ProtectionDomain; |
| |
| import org.objectweb.asm.ClassReader; |
| import org.objectweb.asm.ClassVisitor; |
| import org.objectweb.asm.ClassWriter; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.commons.AdviceAdapter; |
| |
| /** |
| * |
| * @author Robert Scholte |
| * |
| */ |
| public class Premain |
| { |
| public static void premain( String agentArgs, Instrumentation inst ) |
| { |
| inst.addTransformer( new ClassFileTransformer() |
| { |
| |
| public byte[] transform( ClassLoader loader, String className, Class<?> classBeingRedefined, |
| ProtectionDomain protectionDomain, byte[] classfileBuffer ) |
| throws IllegalClassFormatException |
| { |
| if ( "org/apache/maven/model/io/DefaultModelReader".equals( className ) ) |
| { |
| ClassReader r = new ClassReader( classfileBuffer ); |
| final ClassWriter w = new ClassWriter( Opcodes.ASM6 ); |
| |
| ClassVisitor v = new DefaultModelReaderVisitior( Opcodes.ASM6, w ); |
| |
| r.accept( v, ClassReader.EXPAND_FRAMES ); |
| return w.toByteArray(); |
| } |
| else |
| { |
| return classfileBuffer; |
| } |
| } |
| } ); |
| } |
| |
| private static class DefaultModelReaderVisitior |
| extends ClassVisitor |
| { |
| DefaultModelReaderVisitior( int api, org.objectweb.asm.ClassVisitor cv ) |
| { |
| super( api, cv ); |
| } |
| |
| @Override |
| public MethodVisitor visitMethod( int access, String name, String desc, String signature, String[] exceptions ) |
| { |
| MethodVisitor mv = cv.visitMethod( access, name, desc, signature, exceptions ); |
| if ( "getSource".equals( name ) ) |
| { |
| return new GetSourceMethodAdvice( Opcodes.ASM6, mv, access, name, desc ); |
| } |
| else |
| { |
| return mv; |
| } |
| } |
| } |
| |
| // org.apache.maven.model.io.DefaultModelReader.getSource(Map<String, ?>) |
| private static class GetSourceMethodAdvice |
| extends AdviceAdapter |
| { |
| GetSourceMethodAdvice( int api, MethodVisitor mv, int access, String name, String desc ) |
| { |
| super( api, mv, access, name, desc ); |
| } |
| |
| @Override |
| protected void onMethodEnter() |
| { |
| // System.out.println( options ), |
| mv.visitFieldInsn( GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;" ); |
| mv.visitVarInsn( ALOAD, 1 ); |
| mv.visitMethodInsn( INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/Object;)V", false ); |
| } |
| } |
| } |