CODEWITHSUNDEEP
javadesign-patterns
07_05_GuyT
07_05_GuyT

Reputation: 2887

Override several method for same implment

I’ve method which I inherit from the base class.
I’ve 5 class that inherit the method and override it but doing the same, Now I need to change all the methods to support additional scenario according to envoriment variable 

//specific  implications
@Override
protected boolean prepareDirectory(Configuration configuration, Logger logger) throws Exception

    //logic here as before
    if(env===“global”) {

        //do something 
    } 
}

Of course I can do this if inside all the class which works but there is a better approach to overcome this.
Since all the 5 class should use the same logic inside the new if.

Upvotes: 0

Views: 65

Answers (3)

Mustapha Belmokhtar
Mustapha Belmokhtar

Reputation: 1219

You can do that by a Base class that does the common logic of your five classes, and, at the same time, gives the possibility to each one of them to do their specific logics : 

 abstract class Base {
       public RETURN_TYPE commonLogic(SOME_PARAMS){

       //common logic goes here

        }

  public abstract RETURN_TYPE specificLogic(SOME_PARAMS);

  }

and then inherit this Base class, implement the specific logic : 

  class Logic1 extends Base{

    @Override
        public RETURN_TYPE specificLogic(SOME_PARAMS){

        // your specific logic

      }
  }

Upvotes: 1

Naveen Kumar
Naveen Kumar

Reputation: 283

If you are working with Java 8, you should use Interface with a default method.

Create an Interface and then create one method with default access modifier, it would be the best approach.

Upvotes: 1

Murat Karagöz
Murat Karagöz

Reputation: 37584

You can achieve it with an abstract method. Something like

abstract class BaseClass {

    abstract void basePrepare(Configuration configuration, Logger logger);

    protected boolean prepareDirectory(Configuration configuration, Logger logger) throws Exception {
    if (/* condition */) {
        basePrepare(configuration, logger); // implementing class does his stuff
      }
    }
}

Upvotes: 2

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