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javamethodscategoriesauto-generate
Jason
Jason

Reputation: 13986

Add method to Generated class in Java

I have classes that are automatically generated in Java. I want to add a method to that class (in another file) so that I can add additional functionality without changing the generated file. The idea being that if I have to recreate the generated file, I won't lose my new functionality.

In Objective-c I know this is called categories, and in JavaScript you can append the object's prototype, but I am unaware of how to do this in Java or what it is called.

Upvotes: 2

Views: 1274

Answers (4)

Ankit
Ankit

Reputation: 1250

I agree with @Itay I used to have auto-generated classes from Ibatis and the best way to go about with your problem is to extend all the generated classes and add the functionality that you want.

Upvotes: 0

hd1
hd1

Reputation: 34677

You could just use composition, ie:

public class JasonString {
   String wrapped;

   public JasonString() {
      wrapped = new String();
   }

   public String toString() {
      return wrapped.toLowerCase().toString();
   }

   // other methods of wrapped class you're using should just call the corresponding method in wrapped.
}

Upvotes: 1

nkukhar
nkukhar

Reputation: 2025

If you do not have access to the generated class you could try to extend it (if generated class is not final) and add new methods to sub-class... Java doesn't support dynamic attributes as JavaScript.

Upvotes: 0

Itay Karo
Itay Karo

Reputation: 18296

This is not supported in java.

partial classes/partial class file

One thing you can do is inherit the generated class (if it is not final) and add your methods.

Upvotes: 3

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