[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
[
List Home]
|
[aspectj-users] Re: RE:interecepting of all calls and forwarding them
|
> Question 1:
>
> Let's say I have two classes: Stopped and StoppedStub. During testing I
want all calls to Stopped
> be forwarded to StoppedStub. The only way I know of doing that is to catch
each and every method
> call Stoppped and then forward this call to the same method but on
StoppedStub (this is where
> interfaces come in handy). I was wondering if there was a way to do this
automatically.
>
> So, instead of this:
>
> public aspect StoppedStubIns {
> pointcut a(): call(void Stopped.a());
> pointcut b(): call(void Stopped.b());
>
> around(): a() {
> StoppedStub.a();
> }
>
> around(): b() {
> StoppedStub.b();
> }
> }
>
> I want a way to do this:
>
> public aspect StoppedStubIns {
> pointcut allCalls(): call(void Stopped.*());
>
> around(): allCalls() {
> StoppedStub.["method invoked on Stopped"]();
> }
> }
>
Here is my attempt
A and B musth have the same methods and signature
public class A {
public static void m1(){
System.out.println("A.m1()");
}
public static void m2(){
System.out.println("A.m2()");
}
public static void m3(int i){
System.out.println("A.m3(i) " + i);
}
public static void m4(String str){
System.out.println("A.m4() "+ str);
}
public static void m5(String[] str){
System.out.println("A.m5()");
for (int i = 0; i < str.length; i++) {
System.out.println("A.m5() " + i + " " + str[i]);
}
}
}
public class B {
public static void m1() {
System.out.println("B.m1()");
}
public static void m2() {
System.out.println("B.m2()");
}
public static void m3(int i) {
System.out.println("B.m3(i) " + i);
}
public static void m4(String str) {
System.out.println("B.m4() " + str);
}
public static void m5(String[] str) {
System.out.println("B.m5()");
for (int i = 0; i < str.length; i++) {
System.out.println("B.m5() " + i + " " + str[i]);
}
}
}
public aspect TestAspect {
pointcut aPC() : execution (public static * A.*(..));
void around() : aPC(){
System.err.println(thisJoinPoint);
Object[] methodArgs = thisJoinPoint.getArgs();
String methodName = thisJoinPoint.getSignature().getName();
Class[] argClasses = getArgClasses(methodArgs);
try{
Method m = B.class.getMethod(methodName,argClasses);
m.invoke(null,methodArgs);
}catch(Exception exp){
exp.printStackTrace();
}
}
Class[] getArgClasses(Object[] methodArgs){
if(methodArgs == null){
return null;
}
Class[] argClasses = new Class[methodArgs.length];
for(int i=0;i<methodArgs.length;i++){
if(methodArgs[i] instanceof Integer){
argClasses[i] = Integer.TYPE;
}else{
argClasses[i] = methodArgs[i].getClass();
}
}
return argClasses;
}
}
Sample Run
public class Run {
public static void main(String[] args){
A.m1();
A.m2();
A.m3(5);
A.m4("hello");
String[] sr = {"foo","bar"};
A.m5(sr);
B.m1();
B.m2();
B.m3(5);
B.m4("hello");
B.m5(sr);
}
}
Result
execution(void test.A.m1())
B.m1()
execution(void test.A.m2())
B.m2()
execution(void test.A.m3(int))
B.m3(i) 5
execution(void test.A.m4(String))
B.m4() hello
execution(void test.A.m5(String[]))
B.m5()
B.m5() 0 foo
B.m5() 1 bar
B.m1()
B.m2()
B.m3(i) 5
B.m4() hello
B.m5()
B.m5() 0 foo
B.m5() 1 bar
hope this helps
iyad
