A doubt regarding the usage of Reflection

Question

There are several classes A, B, C, D,.... in a package.
A, B, C & D are generic names given to the java files inside the package.
They actually indicate files selected by the user during run-time.
A a = new A();
B b = a.getB();
C c = b.getC();
D d = c.getD();
int count = d.getCount();
a.getB() returns an instance of B.
similarly with getC() & getD() too.
The classes indicated by A, B, C & D are selected by the user.
So, I need to use reflection to implement the above 5 statements.
How do I go about doing this?
Thanks

Answer 1

Basically to create an instance of a dynamic class:
Class cl = Class.forName(myClassName);  // get class
for name
Object o = cl.newInstance();  // create an instance
the above code works fine, if Iam dealing with a single class.
But my problem is Class A returns an object of Class B
which I need to use to get an Object of class C and so on until I get the required data to be parsed form the XML document.
When I invoke a method in Class A, it returns an object(of class B, which I need to use to invoke a method in class B) and so on to get the final value.
I have a large XML document as shown below, which I need to parse.
!-- an xml document -->
<Element A>
   <Element B>
      <Element P>
         Some data for Element P
      <Element Q>
         Some data for Element Q
      <Element R>
   </Element B>
   <Element C>
   <Element D>
   <Element E>
</Element A>I have a class that represents the whole document with the main elements in it. (Class A representing the whole document along with objects representing the main Elements B, C, D & E)
Each element in turn has its own class which are necessary to access the sub-elements of it. (Class B representing Element B and also including Element P & Q)
If I want to parse a specific part of the document(if i need to get the data in Element P), I need to get the Element B from a Class A and use that Object representing Element B to get Element P and then use it to get the required data.
Each class returns a part of the document and as you use the classes(and the returned part of the document), we narrow down to the required region to get the data.