ActionAddExtensionPoint (ArgoUML Javadoc for internal use)

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

org.argouml.uml.diagram.ui
Class ActionAddExtensionPoint

java.lang.Object
  UndoableAction
      org.argouml.uml.diagram.ui.ActionAddExtensionPoint

public final class ActionAddExtensionPoint
extends UndoableAction
extends UndoableAction

A class to implement the addition of extension points to use cases.

This is a singleton. Implemented with a private constructor and a static access method. Marked as final, since it can't sensibly be subclassed (the access method wouldn't work properly).

Stereotype:: singleton

Constructor Summary
`ActionAddExtensionPoint()` Constructor is private, since it cannot be called directly for a singleton.

Method Summary
`void`	`actionPerformed(java.awt.event.ActionEvent ae)` Called if this action is invoked.
`boolean`	`isEnabled()` A predicate to determine if this action is enabled.
`static ActionAddExtensionPoint`	`singleton()` Get the single instance of the action.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

ActionAddExtensionPoint

public ActionAddExtensionPoint()

Constructor is private, since it cannot be called directly for a singleton. Make use of the access funtion.

Method Detail

singleton

public static ActionAddExtensionPoint singleton()

Get the single instance of the action.

Since we are a singleton, this is the only way of accessing the instance, which is created if it does not exist.

Returns:: The singleton instance.

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent ae)

Called if this action is invoked.

Parameters:: ae - The action that caused us to be invoked.
See Also:: ActionListener.actionPerformed(java.awt.event.ActionEvent)

isEnabled

public boolean isEnabled()

A predicate to determine if this action is enabled.

Returns:: true if the superclass affirms this action is enabled and the target is a use case. false otherwise.
See Also:: org.tigris.gef.undo.UndoableAction#isEnabled()