else if (obj instanceof ActivityPart) {
ActivityPart activity = (ActivityPart) obj;
input = activity.getModelElement().getInput();
}
else if (obj instanceof TransitionPart) {
TransitionPart trans = (TransitionPart) obj;
IDOMNode node = ((Transition) trans.getModel()).getInput();
if (node instanceof IDOMElement) {
input = (IDOMElement) node;
}
else if (node instanceof IDOMAttr) {
input = (IDOMElement) ((IDOMAttr) node).getOwnerElement();