This package contains all generic action interfaces.
This class represents an (abstract) action. For each possible action there is another abstract class called e.g. Foo_Action. To retrieve such a Foo_Action, call the Get_Action methode from the Node_Model with "Foo" as the name.
Executes the action.
Precondition: All required data was set.
Postcondition: The action was executed.
Cancels an action. Note: this will do nothing in most cases. But you should use it to a) document your intention and b) it might be usefull for some actions in the future...
Precondition: The action wasn't executed yet.
Postcondition: The action will not be executed.