DeleteHandlerService (Oracle Fusion Middleware Java API Reference for Oracle Extension SDK Reference)

A service for registering DeleteActionHandlers for a specific subtype Node. Once a delete action handler is registered for a subtype of Node, the IDE will invoke the handler whenever a node of that type is to be deleted, using any of the possible gestures, once the node in the navigator and selecting Delete:

Right-clicking
Pressing the delete key once the node is selected in the navigator
File->Delete
Edit->Delete

The way a subtype of Node is registered with the service is DeleteHandlerService.registerDeleteActionHandler(MyCompexNode.class, MyComplexNodeDeleteHandler.class); The way to manually invoke the delete handler for a node is to call DeleteHandlerService.createDeleteHandler(context) where the context has its selection set to an array of the node subtypes.

Method Summary
`static DeleteActionHandler`	`createDeleteHandler(Context context)` Creates a delete action handler for the selection made in the given context.
`static void`	`registerDeleteActionHandler(java.lang.Class<? extends Element> classKey, java.lang.Class<? extends DeleteActionHandler> deleteActionHandlerClass)` Registers a `DeleteActionHandler` for all nodes of type `classKey`.
`static void`	`registerLookupHelper(DeleteActionHandler.LookupHelper lookupHelper)` Registers a lookup helper.
`static java.lang.Class<? extends DeleteActionHandler>`	`unregisterDeleteActionHandler(java.lang.Class<? extends Element> classKey)` Unregisters the delete handler.

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

Method Detail

registerDeleteActionHandler

public static void registerDeleteActionHandler(java.lang.Class<? extends Element> classKey,
                                               java.lang.Class<? extends DeleteActionHandler> deleteActionHandlerClass)

Registers a DeleteActionHandler for all nodes of type classKey.

unregisterDeleteActionHandler

public static java.lang.Class<? extends DeleteActionHandler> unregisterDeleteActionHandler(java.lang.Class<? extends Element> classKey)

Unregisters the delete handler.

Parameters:: classKey -
Returns:: the unregistered delete handler

createDeleteHandler

public static DeleteActionHandler createDeleteHandler(Context context)

Creates a delete action handler for the selection made in the given context. To determine what delete handler to return, this service uses the types returned from context.getSelection()

Parameters:: context - the context whose selection will be targeted when deleting
Returns:: the DeleteActionHandler corresponding to the nodes in selection.

registerLookupHelper

public static void registerLookupHelper(DeleteActionHandler.LookupHelper lookupHelper)

Registers a lookup helper. When deciding which delete handler to pick, all client lookup helpers are consulted. If none are handling it, the default lookup helper will be called, which simply goes by the current selection and finds the best match it can find for the selection.