Internal functionality of getServletContext()

[NitishK Kumar]

Hi I want to know what happens when we write:

public class MyServlet extends GenericServlet{
public void init()throws ServletException{
 ServletContext sc=getServletContext();
  //more code 
   }
}  

[Bear Bibeault]

It returns the container's implementation of the ServletContext interface.

[NitishK Kumar]

Bear Bibeault wrote:It returns the container's implementation of the ServletContext interface.

I mean to ask that generally a method is invoked on an object and getServletContext() is in servletconfig interface. So, how container locates the servletconfig object.

For eg:
We write as follows

class A{
//code
void abc(){
//code
}
public static void main(String []s){
A a1=new  A();
a1.abc();
}
} 

Similarly, here also it should be as

servletconfig.getServletContext()

. So how the container locates the servletconfig object?

[Ulf Dittmer]

Similarly, here also it should be as "servletconfig.getServletContext()"...

It actually is. "getServletContext()" is a short form of "this.getServletContext()", where "this" refers to the current object. In your example, the class extends from GenericServlet, which implements ServletConfig and has a getServletContext method.

[Tejas Shah]

Adding some information..

And then the call passes to the container and container which takes care of the servlet context, is returned. The actual implementations may be found in container's code.