Overview

The following table shows the available method hooks:

LN Studio	LN implementation
before execute hook	see section Before Execute Method Hook
on execute hook	see section On Execute Method Hook
after execute hook	see section After Execute Method Hook

Specifics on using hooks for ‘batch’ implementations are discussed in section Hooks for Batch Methods.

The following table indicates which hooks are supported for LN:

Method	Hooks
	Before execute	On execute	After execute
List	Yes	Yes	Yes
Show	Yes	Yes	Yes
Create	Yes	Yes	Yes
Change	Yes	Yes	Yes
Delete	Yes	Yes	Yes
SubscribeEvent	Yes	Yes	Yes
UnsubscribeEvent	Yes	Yes	Yes
PublishEvent	Yes	Yes	Yes
OnEvent	Yes	Yes	Yes
SubscribeList	No	No	No
SupportsProcessingScope	No	No	No
SupportsReferentialIntegrity	Yes	Yes	Yes
CreateRef	Yes	Yes	Yes
DeleteRef	Yes	Yes	Yes
Any specific method (including methods for receiving BODs, see Implementing OAGIS BODs for LN)	Yes	Yes (Mandatory)	Yes

For most standard methods, if you create an on execute hook it is possible to fall back to the default behavior. This is done through io.default (see section On Execute Method Hook).

The following table shows for what methods io.default can be used.

Method	io.default if top-down/bottom-up	io.default in batch implementation	Notes
List	no	no	(1)
Show	no	no	(1)
Create	yes	no	(2)
Change	yes	no	(2)
Delete	yes	no	(2)
SubscribeEvent	n/a	yes
UnsubscribeEvent	n/a	yes
PublishEvent	n/a	yes
OnEvent	n/a	yes
SubscribeList	n/a	n/a	(3)
SupportsProcessingScope	n/a	n/a	(3)
SupportsReferentialIntegrity	n/a	yes
CreateRef	yes	no
DeleteRef	yes	no

1. io.default is unsupported for List and Show.
2. For methods that are by default handled top-down or bottom-up, no standard batch implementation is available.
3. Hooks are unused for this method.