Question

I have a System called ‘A’ that holds the objects of itself into data structure by name. Basically System ‘A’ has a function called getObject(obj_name). This function creates an object with the given name, obj_name, if it’s not already exists and then return it otherwise it just return the object.

Now, Program 1 uses System ‘A’ and creates an object called “Program1_Object” using above function (getObject)

Program 2 calls getObject with “Program1_Object” as its argument.

The problem in here is getObject returns Program 1 object to Program 2. I want to add permission to that object that if object is not meant for the caller program returns an error or create a new one for the caller program.

What is a trick behind it?

Thanks

Answer 1

A could be a simple wrapper for a hash table. Permissions could be implemented with an additional parameter to getObject stating the permissions of the calling code.