Deletion objector for determining whether or not to delete an object from an application

A user interface (UI) component in a computer-readable medium, execution of which causes one or more processors to determine whether or not to delete a resource object from a resource object database maintained by an application, the UI component comprising:

• a registration component to register one or more application components, which are interested in changes to the resource object database, as deletion objectors;
• a user request component to receive a deletion request from a user, the deletion request identifying one or more resource objects in the resource object database selected by the user to be deleted;
• and
• an agent object corresponding to each deletion objector, the agent object relaying the deletion request to the deletion objector and receiving reply messages sent by the deletion objector in response to the deletion request.

A method of determining whether or not to delete a resource object from an application executed on one or more processors, the application including a user interface (UI) component and one or more value-add components registered as deletion objectors, the method comprising:

• inputting a deletion request via the UI component, the deletion request being a request to delete one or more selected resource objects;
• relaying the deletion request from the UI component to the deletion objectors;
• and
• sending a reply message from each of the deletion objectors to the UI component in response to the deletion request based on dependencies on the selected resource objects.

An apparatus for determining whether or not to delete a resource object from a resource object database, the resource object database being maintained by an application executed on one or more processors, the apparatus comprising:

• registration means for registering one or more value add components of the application as deletion objectors;
• user interface (UI) means to input a deletion request to delete one or more selected resource objects from the resource object database;
• relaying means for relaying the received deletion request to the deletion objectors;
• receiving means for receiving a reply message from each of the deletion objectors in response to the deletion request;
• and
• delete authorization means for determining whether or not to delete the selected resource objects based on the received reply messages.