Controlling method calls

[bugger]

I wrote a Java class with two constructors and few methods:

Code:

public class A
{

public A() // default constructor
{
...
}

public A(in a) // constructor with one parameter
{
...
}

public void processSelectedData() 
// should be called only when object of class A is created 
// using constructor with one parameter
{
...
}

public void processEverything()
// should be called only when object of class A is 
// created using default constructor
{
...
}

}

The code comments will brief you about what I am looking for. How can I impose these rules. I don't want the user to call the every method with an object.

Thanks for your help.

[tim]

Hello bugger.

You can add a private flag attribute to monitor which constructor was called. For example:

Code:

public class A{\
    // flag types
    private enum TConstructor {noParameter, oneParameter};

    // the flag
    TConstructor constructorUsed;

    // default constructor
    public A(){
        constructorUsed = TConstructor.noParameter;
    }

    // constructor with one parameter
    public A(in a){ 
        constructorUsed = TConstructor.oneParameter;
    }

    // should be called only when object of class A is created 
    // using constructor with one parameter
    public void processSelectedData() throws Exception{
        if (constructorUsed != TConstructor.oneParameter){
            throw new Exception("processSelectedData() should be called only when object of class A is created using constructor with one parameter.");
        } else {
            // TODO: Add your code here
        }
    }

    // should be called only when object of class A is 
    // created using default constructor
    public void processEverything() throws Exception{
        if (constructorUsed != TConstructor.noParameter){
            throw new Exception("processEverything() should be called only when object of class A is created using default constructor.");
        } else {
            // TODO: Add your code here
        }
    }
}

This code was checked by hand. Hope this helped you.

[bugger]

Great. Thanks a dozen.
This is what I was looking for.