编译插桩和动态代理

compile group: 'org.ow2.asm', name: 'asm', version: '5.1'
compile group: 'org.ow2.asm', name: 'asm-commons', version: '5.1'

    project.getGradle().getTaskGraph().addTaskExecutionGraphListener(new TaskExecutionGraphListener() {
        @Override
        public void graphPopulated(TaskExecutionGraph taskGraph) {
            for (Task task : taskGraph.getAllTasks()) {
                if ((task.name.equalsIgnoreCase(hackTransformTaskName) || task.name.equalsIgnoreCase(hackTransformTaskNameForWrapper))
                        && !(((TransformTask) task).getTransform() instanceof SystemTraceTransform)) {
                    project.logger.warn("find dex transform. transform class: " + task.transform.getClass() + " . task name: " + task.name)
                    project.logger.info("variant name: " + variant.name)
                    Field field = TransformTask.class.getDeclaredField("transform")
                    field.setAccessible(true)
                    field.set(task, new SystemTraceTransform(project, variant, task.transform))
                    project.logger.warn("transform class after hook: " + task.transform.getClass())
                    break
                }
            }
        }
    })

    /** 
     * 运行时生成业务逻辑 
     * @return 
     * @throws Exception 
     */  
    public static IDBQuery createJavassistBytecodeDynamicProxy() throws Exception{  
        ClassPool mPool = new ClassPool(true);  
        //定义类名  
        CtClass mCtc = mPool.makeClass(IDBQuery.class.getName() + "JavaassistBytecodeProxy");  
        //需要实现接口  
        mCtc.addInterface(mPool.get(IDBQuery.class.getName()));  
        //添加构造函数  
        mCtc.addConstructor(CtNewConstructor.defaultConstructor(mCtc));  
          
        //添加类的字段信息，使用动态Java代码  
        mCtc.addField(CtField.make("public" + IDBQuery.class.getName() + "real;", mCtc));  
        String dbQueryname = DBQuery.class.getName();  
        //添加方法，这里使用动态Java代码指定内部逻辑  
        mCtc.addMethod(CtNewMethod.make("public String request() { if(real==null) real = new " +dbQueryname+"(); return real.request();}", mCtc));  
          
        //基于以上信息，生成动态类  
        Class pc = mCtc.toClass();  
        //生成动态类的实例  
        IDBQuery bytecodeProxy = (IDBQuery) pc.newInstance();  
        return bytecodeProxy;  
    }