aoptest.groovy

// Intercepter sample test
//   see http://d.hatena.ne.jp/funatti/20100717/1279390870

class Tracer implements Interceptor{
  Object beforeInvoke(Object obj, String name, Object[] args){
    println "BEFORE: ${obj}.${name}"
  }

  boolean doInvoke(){ return true }

  Object afterInvoke(Object obj, String name, Object[] args, Object result){
    println "AFTER: ${obj}.${name}"
    return result
  }
}

//== case 1 (before after correct ?)==
println "====start====="

def tracer = new Tracer()
def proxy = ProxyMetaClass.getInstance(String)
proxy.interceptor = tracer

/*
	BEFORE: hello.multiply
	AFTER: hello.multiply
	hellohellohello
*/
proxy.use{ // intercept start
  println "hello"*3
}

//NG case
/*
	hello
*/
proxy.use{ 
  println "hello"
}

println "====end====="