Passing an Extra Parameter to the New generated Method...

[ravipal]

Dear users,
I am working on a task which is to make new method with one extra parameter , using the existing method source like :

Original Method :
Method A (int a) {
return a+2;
}

Generated Method :
MethodAx(int a, new MyClass b) {
return a+2;
}

Than i need to change the original Method body to:

Method A(int a) {
MethodAx(a,new MyClass());
}


So basicaly it is redirection.

My problem is i am not able to put the Extra parameter call inthe Original Method.

I am not able to generate
MethodAx(a,new MyClass()); this line of code.

Any help will be greatly Appriciated.

Thaking in advance.

Ravi Pal

[chiba]

What do you want to do with b passed
to methodAx?

[ravipal]

b is my own class.. which measures the memory used by the Methods.. in the class.

It is somethign like this :

class MyClass {
int usage = 0;

statis getMyClassObj() {
.........
return new MyClass();
..........
}
}

So i measure for every class and method the memory used.

Hope this helps.

-- Ravi Pal

[ravipal]

Hello Chibba.. i was waiting for your comments on this. Whether it is possible or not?

i hope you will answer?

--Ravi Pal

[chiba]

I'll add this feature to Javassist. So, please
help me design the API for that.

What I'd like to know is what you want to
do with b in the generated method Ax:

> Generated Method :
> MethodAx(int a, new MyClass b) {
> return a+2;
> }

In other words, let me know the body of Ax.
The example above does not use b at all!

Thanks,
Chiba

[ravipal]

chiba,
well 'b' is an object of custome class. it could do anything. Over here in my case i am trying to manipulate some hidden variable in that object.

MethodAx(int a, new MyClass b) {
b.set(returning+"a+2");
....
..
b.setUsageMemory(calculateMemory());
...
return a+2;
}

Something like this.

The easy way can be to introduce the new MyClass() object in the Existing method only... which will be very easy like :
MethodA(int a) {
MyClass b = new MyClass();
...//any statements in original method
return a+2
}

But the problem is that if i keep on doing this in each and every method it is going to consume lots of memory in my case.. so i just want a wrapper which will redirect all the Method Invocations to my New METHOD Methodx(int a ,new MyClass b).... so that my application is not affected at all.

in any case i achieved 80% of my goal i could get the new Method Generated and i generate a new class also but the error i get is i could not invoke the new method from the original method. that is my problem.

In the example below : methoda is original method and i generate methodax with extra parameter.. i am able to do that successfully i guess (When i decompile my class file i can see the new method).

Originaly i have this method in the class :

methoda(int a) {
..
// any statements.
..
}

What i want is another method like this :
methodax(int a, MyClass b) {
//some statements plus my own statements
}

I can get like that without a problem. But i want to change the original method body to invoke the new gerenated method.

What i want is :
methoda(int a) {
methodax(int a, new myClass()) // i am not able to achieve this
}

What i get is (when i decompile my generated class):
methoda(int a) {
methodax(new Object[]{
new Integer(a), new MyClass(<no parameter>)
});
}

and when i try to run the Class using > java testClass

it gives errror that Some variable is not registered and you are trying to access it.

So... what i get is that the Method invocation which i want to make is.. a problem.

So if you could help me getting this it will be a big help. Thanks a lot.
--Ravi