/**
* Prompts the user if they really want to delete the given item. If the user consents, the item
* is deleted. Otherwise, no action is taken.
*
* @param toDelete The item to delete.
* @param editor The editor in which the delete is taking place.
* @return the parent of the element before its deletion, or <code>null</code> if no element is
* deleted.
*/
private Object deleteSingleElement(Object toDelete, ObjectMappingMultiPageEditor editor) {
boolean delete = false;
Object lastParent = null;
if (toDelete instanceof IObjectMappingAssoziationPO) {
delete =
MessageDialog.openConfirm(
getActiveShell(),
Messages.DeleteTreeItemActionOMEditorOMTitle,
Messages.DeleteTreeItemActionOMEditorOMText1);
if (delete) {
lastParent =
editor.getOmEditorBP().deleteAssociation((IObjectMappingAssoziationPO) toDelete);
editor.getEditorHelper().setDirty(true);
}
} else if (toDelete instanceof IComponentNamePO) {
delete =
MessageDialog.openConfirm(
getActiveShell(),
Messages.DeleteTreeItemActionOMEditorOMTitle,
Messages.DeleteTreeItemActionOMEditorOMText2);
if (delete) {
lastParent = editor.getOmEditorBP().deleteCompName((IComponentNamePO) toDelete);
editor.getEditorHelper().setDirty(true);
}
} else if (toDelete instanceof IObjectMappingCategoryPO) {
delete =
MessageDialog.openConfirm(
getActiveShell(),
Messages.DeleteTreeItemActionOMEditorOMTitle,
Messages.DeleteTreeItemActionOMEditorOMText4);
if (delete) {
lastParent = editor.getOmEditorBP().deleteCategory((IObjectMappingCategoryPO) toDelete);
editor.getEditorHelper().setDirty(true);
}
}
return lastParent;
}
/** {@inheritDoc} */
public Object executeImpl(ExecutionEvent event) {
IWorkbenchPart activePart = HandlerUtil.getActivePart(event);
if (!(activePart instanceof ObjectMappingMultiPageEditor)) {
return null;
}
final ObjectMappingMultiPageEditor editor = (ObjectMappingMultiPageEditor) activePart;
editor
.getEditorHelper()
.doEditorOperation(
new IEditorOperation() {
public void run(IPersistentObject workingPo) {
IStructuredSelection selection = getSelection();
Class classType = null;
for (Object obj : selection.toArray()) {
// selectionitems must be same type
if (classType == null) {
classType = obj.getClass();
}
if (obj.getClass() != classType) {
return;
}
}
Object lastParent = null;
if (selection.size() == 1) {
lastParent = deleteSingleElement(selection.getFirstElement(), editor);
} else if (selection.size() > 1) {
boolean delete = false;
delete =
MessageDialog.openConfirm(
getActiveShell(),
Messages.DeleteTreeItemActionOMEditorOMTitle,
Messages.DeleteTreeItemActionOMEditorOMText3);
if (delete) {
lastParent = deleteMultipleElements(selection.toArray(), editor);
}
}
if (lastParent != null) {
refreshViewer(editor, lastParent);
}
}
});
return null;
}
/**
* @param toDelete The items to delete.
* @param editor The editor in which the delete is taking place.
* @return the parent of one of the given elements before its deletion, or <code>null</code> if no
* elements are deleted.
*/
public static Object deleteMultipleElements(
Object[] toDelete, ObjectMappingMultiPageEditor editor) {
IObjectMappingCategoryPO lastParent = null;
for (Object node : toDelete) {
if (node instanceof IComponentNamePO) {
lastParent = editor.getOmEditorBP().deleteCompName((IComponentNamePO) node);
} else if (node instanceof IObjectMappingAssoziationPO) {
lastParent = editor.getOmEditorBP().deleteAssociation((IObjectMappingAssoziationPO) node);
} else if (node instanceof IObjectMappingCategoryPO) {
if (!willAncestorBeDeleted((IObjectMappingCategoryPO) node, toDelete)) {
lastParent = editor.getOmEditorBP().deleteCategory((IObjectMappingCategoryPO) node);
}
}
}
if (toDelete.length > 0) {
editor.getEditorHelper().setDirty(true);
}
return lastParent;
}