Reuse Call Hierarchy API

[Aruna Devi]

Hi

To find the callers and callees of a method, Eclipse provides Open Call Hierarchy(Ctrl+Alt+H)

I would like to invoke the Call hierarchy from my program where it performs the same operation

If there are any possibilities to do so, direct me to the right path

Thanks in advance

[Tolls]

The place I would look would be the org.eclipse.jdt package. I think that's where this sort of code analysis/searching stuff lives.

I've never used it, though, but you should be able to find documentation over on the Eclipse site for it.

[jameswarner]

I agree to correct path “org.eclipse.jdt” to store file reuse call Hierarchy API. Just need two method create call and caller method to open similar time to call Hierarchy API.

[jim829]

Do you actually want to call Eclipse's version of this from your program or do you want to write your own version of that capability? I presume the former would only work within the Eclipse environment.

Regards,
Jim

[Aruna Devi]

I just want to invoke the Eclipse API of Call Hierarchy from my program, rather than writing the same functionality

[Tolls]

Bear in mind that it is quite likely this call chain requires the code analysis part of Eclipse, which itself possibly requires the source code.
I don't know, but I wouldn't be surprised.
You know all that indexing Eclipse does? It's for stuff like this.

[Aruna Devi]

Does it mean that the method cannot be invoked and has to be written manually?

[Tolls]

No, but it means you'll have to look into exactly what it needs to do its job.
The above is a bit of guesswork on my part, but I'd be surprised if it didn't need more than a simple method call. It has to be able to analyse the code somehow.

[jim829]

You have explained what you want to do but you haven't explained why. Since this can be used from Eclipse directly you already have the capability. What are you trying to achieve in doing this? For what purpose? Sometimes there might be easier alternatives.

Regards,
Jim

[Aruna Devi]

The aim is to develop a code change impact analysis tool. As a first step, I need to get the hierarchy of the particular method which is being modified and then have to proceed further.

[Tolls]

So this will be an Eclipse plugin?
If that's the idea then you need to read up on how plugins work for that IDE. Not written one myself, though.

[Norm]

Also posted at: Reuse Call Hierarchy API - Java | Dream.In.Code

[Aruna Devi]

I just thought of using all available resources, that's why posted in a different forum.

What I'm trying to develop is a eclipse plugin, since Call Hierarchy is a internal to eclipse I couldn't figure out any kind of documentation to understand how it is working.

Still under confusion how to take the process to next step

[SurfMan]

I just thought of using all available resources, that's why posted in a different forum.

We know why people post in multiple forums. The thing is, if you would post the links to those posts too, then we can check if there is an answer given. Otherwise you would be wasting our valuable time with a problem that is already solved.

[Tolls]

Have you looked at the JDT project, as I suggested?
That's where this stuff lives.
JDT Core Component

As it says there:

JDT Core is the Java infrastructure of the Java IDE. It includes ... A Java Model that provides API for navigating the Java element tree. The Java element tree defines a Java centric view of a project. It surfaces elements like package fragments, compilation units, binary classes, types, methods, fields ... An indexed based search infrastructure that is used for searching, code assist, type hierarchy computation, and refactoring. The Java search engine can accurately find precise matches either in sources or binaries.

[DarrylBurke]

... valuable time ...

Huh?

[SurfMan]

Just for the sake of alternative options, have you thought about using Aspect Oriented Programming (AOP). AspectJ is a nice place to start, and specifically designed for situations like this.

Example here: Java Method Logging with AOP and Annotations.

[Tolls]

This is for a plugin, so I'm presuming it isn't around logging or anything.
The OP simply wants to access the Eclipse API so they can use the call hierarchy functionality.

This doesn't sound like an app, as such.

[SurfMan]

Right, I missed that part. I though he wanted to use the Eclipse code in his own application. Can't help you there. I am not an Eclipse man.

[jim829]

Huh?

I agree. I think he meant ".. Jim's valuable time.."

Regards.
Jim