Question

The Situation is that I have to use Function pointers for so many functions in Java (so I did it this way) and saved each anonymous class to a static variable of the Interface, so that I could use them directly.

 /** The Constant HARDLIM. */
    public static final TransferePatternable HARDLIM =
    new TransferePatternable() {
        public DoubleMatrix transfere(DoubleMatrix netSum, double theta) {
        return netSum.gt(theta);
        }
        public String getFuncName() {
        return "HARDLIM";
        }
    };

But the problem is that sometimes I don’t need to provide the Theta so if I remove it the polymorphism won’t work, (2 Functions out of 10 don’t need theta) so I had to put it (Function declaration conventions now ugly) so I thought of passing the whole Object which actually contains both netsum and theta.

But I’m starting to worry, cause it’s also going to ruin what this function really is for. So at last I suggested I put these function separately (non anonymous) and then make anonymous functions use them but the argument would be the object. Like the following:

 /** The Constant HARDLIM. */
    public static final TransferePatternable HARDLIM =
    new TransferePatternable() {
        public DoubleMatrix transfere(MyObject obj) {
        return MyObjectUtilFun.hardlim(obj.getNetsum,obj.getTheta);
        }
        public String getFuncName() {
        return "HARDLIM";
        }
    };

So Am I taking the right steps ? or I’m messing around, Please guide me!

Answer 1

At the end I used The second choice but with some notes in mind:

1. To always have functions (i.e Hardlim) defined independently in utility classes.
2. To state in Javadocs what this variable really is and the utility function being used.

3. I also found the price of confusing users with unnecessary arguments to be high cause the application is already complex no need to be more complicated.

   public static final TransferePatternable HARDLIM =
   new TransferePatternable() {
       public DoubleMatrix transfere(MyObject obj) {
       return MyObjectUtilFun.hardlim(obj.getNetsum,obj.getTheta);
       }
       public String getFuncName() {
       return "HARDLIM";
       }
   };