How to use same java method for different parameters types?

My problem:

I have 2 defined classes

• CreateObjectRequest
• UpdateObjectRequest

that must be verified by an utility method.

As those 2 objects have the same fields, the same verify method can be applied on both types.
Right now I’m just overloading by using 2 methods, but it’s verbosy.

public class CreateObjectRequest {
    CustomObjectA a;
    CustomObjectB b;
}
public class UpdateObjectRequest {
    CustomObjectA a;
    CustomObjectB b;
}

public void validateRequest(CreateObjectRequest createObjectRequest) {
    //long body
    //...
}
public void validateRequest(UpdateObjectRequest updateObjectRequest) {
    //same long body... 
    //...
}

How can I reduce the verbosity of this code ?

>Solution :

If those 2 classes share a lot of the same fields and are related to one another, then creating an Abstract parent class would be a solution:

public abstract class ObjectRequest {
    CustomObject a;
    CustomObject b;

}

then have your other classes extend that class via inheritance:

public class CreateObjectRequest extends ObjectRequest {
    // any fields / method that are specific to this class
}

public class UpdateObjectRequest extends ObjectRequest {
    // any fields / method that are specific to this class
}

And you can then define your validation method to take the abstract Superclass as an argument:

public void validateRequest(ObjectRequest objectRequest) {
    //long body
    //...
}