/**
* Called when an IJavaElement changes. Used to reflect changes in the editor, which has a view
* that is based on the <code>JavaModel</code>.
*
* @param event - The change that occurred to the <code>JavaModel</code>.
*/
@SuppressWarnings("unchecked")
public void elementChanged(ElementChangedEvent event) {
try {
/* Goes through these classes looking for any that are added, moved
* or removed. Calls methods that updates the editor to reflect any
* changes found.
*/
for (Class type : map.keySet()) {
List<IJavaElementDelta> added = findAddedElements(event.getDelta(), type);
List<IJavaElementDelta> removed = findRemovedElements(event.getDelta(), type);
List<IJavaElementDelta> changed = findChangedElements(event.getDelta(), type);
HashMap<IJavaElement, IJavaElement> moved = extractMovedElements(added, removed);
// ignore updating the editors if no changes occurred
if (added.size() == 0 && removed.size() == 0 && moved.size() == 0 && changed.size() == 0) {
continue;
}
List<DiagramEditor> editors = new ArrayList<DiagramEditor>(DiagramEditor.getEditors());
// handle changes
for (DiagramEditor editor : editors) {
RootModel root = editor.getRootModel();
// handle moves
for (IJavaElement sourceElement : moved.keySet()) {
IJavaElement targetElement = moved.get(sourceElement);
map.get(sourceElement.getClass()).handleMove(root, sourceElement, targetElement);
}
// handle removes
for (IJavaElementDelta removedElement : removed) {
map.get(removedElement.getElement().getClass())
.handleRemove(root, removedElement.getElement());
}
// handle adds
for (IJavaElementDelta addedElement : added) {
map.get(addedElement.getElement().getClass())
.handleAdd(root, addedElement.getElement());
}
// handle changes (to modifiers, etc.)
for (IJavaElementDelta changedElement : changed) {
handleElementChange(changedElement);
}
editor.forceRefreshRelationships();
}
}
} catch (Throwable t) {
// TODO Incremental exploration throws Null Pointer. Virtually unreproduceable.
GreenException.critical(t);
} finally {
TypeRefactorHandler.REMOVED_TYPE = null;
}
}
/**
* Updates the display when some change occurs to a Java element that doesn't involve removal,
* addition, or movement.
*
* @param elementDelta - The delta of the element that changed.
*/
private void handleElementChange(IJavaElementDelta elementDelta) {
IJavaElement element = elementDelta.getElement();
// update the modifiers of the element (if they changed)
if ((elementDelta.getFlags() & IJavaElementDelta.F_MODIFIERS) != 0) {
for (DiagramEditor editor : DiagramEditor.getEditors()) {
RootPart rootEditPart = editor.getRootPart();
RootModel root = (RootModel) rootEditPart.getModel();
AbstractModel abstractModel = root.getModelFromElement(element);
if (abstractModel != null) {
if (abstractModel instanceof FieldModel) {
FieldModel fModel = (FieldModel) abstractModel;
FieldPart fEditPart = (FieldPart) rootEditPart.getPartFromModel(fModel);
fEditPart.updateIcon();
} else if (abstractModel instanceof MethodModel) {
MethodModel mModel = (MethodModel) abstractModel;
MethodPart mEditPart = (MethodPart) rootEditPart.getPartFromModel(mModel);
mEditPart.updateIcon();
}
}
}
}
}