File file = new File("/home/rohit/func.c");
		IFileStore fileOnLocalDisk = EFS.getLocalFileSystem().getStore(file.toURI());
		FileStoreEditorInput editorInput = new FileStoreEditorInput(fileOnLocalDisk);
		IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		IWorkbenchPage page = window.getActivePage();
		try {
			page.openEditor(editorInput, "org.eclipse.ui.DefaultTextEdtior");
		} catch (PartInitException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}*/

IWorkspaceRoot ws = ResourcesPlugin.getWorkspace().getRoot();
		IPath location = new Path("/home/rohit/func.c");
		IFile file = ws.getFileForLocation(location);
		IProject project = ws.getProject("External Files");
		
		if (!project.exists())
			try {
				project.create(null);
			
		if (!project.isOpen())
		    project.open(null);
		
		//IFile file = project.getFile(location.lastSegment());
		//file.createLink(location, IResource.NONE, null);
		FileEditorInput fileEditorInput = new FileEditorInput(file);
		IWorkbench workbench = PlatformUI.getWorkbench();
		IEditorDescriptor desc = workbench.getEditorRegistry().getDefaultEditor(file.getName());
		IWorkbenchPage page = workbench.getActiveWorkbenchWindow().getActivePage();
		page.openEditor(fileEditorInput, desc.getId());
		
			} catch (CoreException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}