Package com.sap.cds.impl.diff

Interface CdsDiffProcessor.DiffVisitor

Enclosing interface:

CdsDiffProcessor

@Beta
public static interface CdsDiffProcessor.DiffVisitor

A callback, which is called by the CdsDiffProcessor on differences between two images of data.

Method Summary

Modifier and Type	Method	Description
default void	added(Path path, CdsElement association, Map<String,Object> newValue)	This method is called when the CdsDiffProcessor detects that a new entry is added to a collection of entities: a composition of many entities a cascading association to many entities the images, if the processor processes a collection of images
default void	changed(Path path, CdsElement element, Object newValue, Object oldValue)	This method is called when the CdsDiffProcessor detects a change between values of an element of an entity
default void	removed(Path path, CdsElement association, Map<String,Object> oldValue)	This method is called when the CdsDiffProcessor detects that an entry was removed from the collection of entities: a composition of many entities a cascading association to many entities the images, if the processor processes a collection of images

Method Details

changed

default void changed(Path path,
 CdsElement element,
 Object newValue,
 Object oldValue)

This method is called when the CdsDiffProcessor detects a change between values of an element of an entity

Parameters:

path - the path to the entity where the changed element is found

element - the CdsElement that represents the changed element

newValue - the new value of the element or null if the element is removed or explicitly set to null

oldValue - the old value of the element or null if the element is added

added

default void added(Path path,
 CdsElement association,
 Map<String,Object> newValue)

This method is called when the CdsDiffProcessor detects that a new entry is added to a collection of entities:

• a composition of many entities
• a cascading association to many entities
• the images, if the processor processes a collection of images

The method is called for every added entry.

Parameters:

path - path to the association where the change occurs.

association - the instance of the CdsElement that represents element that defines the association where change occurs.

newValue - the content of the added entity

removed

default void removed(Path path,
 CdsElement association,
 Map<String,Object> oldValue)

This method is called when the CdsDiffProcessor detects that an entry was removed from the collection of entities:

• a composition of many entities
• a cascading association to many entities
• the images, if the processor processes a collection of images

The method is called for every removed entry.

Parameters:

path - path to the association where the change occurs.

association - the instance of the CdsElement that represents element that defines the association where change occurs.

oldValue - the content of the removed entity