IntroPartPresentation presentation = (IntroPartPresentation) introPart
.getAdapter(IntroPartPresentation.class);
if (direction.equalsIgnoreCase(VALUE_BACKWARD))
return presentation.navigateBackward();
else if (direction.equalsIgnoreCase(VALUE_FORWARD))
return presentation.navigateForward();
else if (direction.equalsIgnoreCase(VALUE_HOME))
return presentation.navigateHome();
return false;