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[news.eclipse.newcomer] Re: Creating a new Editor 
Peyush Jain wrote:

Hello everyone,

I am new here, so please point me to the correct newsgroup if this is not the right newsgroup to ask the following question.

I am trying to develop a new editor for all the files with extension cfe. I followed all the steps that are shown in numerous tutorials for creating an editor but for some reason what works for everyone is not working for me. I created a CfeEditor class (extends EditorPart) with the following init() function.

*******************************************************************
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.part.EditorPart;
import org.eclipse.ui.part.FileEditorInput;

public void init(IEditorSite site, IEditorInput input)
  throws PartInitException
{
  setSite(site);
  setInput(input);

  System.out.println("INPUT: "+input.getClass());

  if(input instanceof FileEditorInput)
  {
    System.out.println("input is an instance of FileEditorInput.");
  }
  else
  {
    System.out.println("input is NOT an instance of FileEditorInput");
  }
}
*******************************************************************

I got the following output:
*******************************************************************
INPUT: class org.eclipse.ui.part.FileEditorInput
input is NOT an instance of FileEditorInput
*******************************************************************

(Note I tried using instanceof IFileEditorInput instead of FileEditorInput, but got the same results)

This looks strange. Do you have anything in .log? Maybe some classloader issue. I suggest to debug this in the Debugger.

Dani


This is very confusing because if input is of the class FileEditorInput then it SHOULD be an instance of FileEditorInput. Once this works, I want to get to the file (for parsing) by using ((FileEditorInput)input).getFile(). If I don't check for the instance then it throws an ClassCastException.

Please help...

Thanks,

Peyush