Package com.sap.cds.impl.diff

Interface CdsDiffProcessor

All Known Implementing Classes:

DiffProcessor

@Beta
public interface CdsDiffProcessor

The CdsDiffProcessor allows to process two sets of nested maps of a CDS data that represent the old and the new image of the data of the same type and notifies a CdsDiffProcessor.DiffVisitor about differences.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
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
CdsDiffProcessor	add(CdsDataProcessor.Filter filter, CdsDiffProcessor.DiffVisitor diffVisitor)	Adds a CdsDiffProcessor.DiffVisitor, which is notified about the differences in elements that match a given filter.
default CdsDiffProcessor	add(CdsDiffProcessor.DiffVisitor diffVisitor)	Adds an object implementing interface CdsDiffProcessor.DiffVisitor, which is notified about the differences in all elements.
void	process(Iterable<? extends Map<String,Object>> newImages, Iterable<? extends Map<String,Object>> oldImages, CdsStructuredType type)	Runs the CdsDiffProcessor on the new and old images of the data represented as a collection of entries or an instances of the Result
void	process(Map<String,Object> newImage, Map<String,Object> oldImage, CdsStructuredType type)	Runs the CdsDiffProcessor on the new and old image of the data.

Method Details

add

default CdsDiffProcessor add(CdsDiffProcessor.DiffVisitor diffVisitor)

Adds an object implementing interface CdsDiffProcessor.DiffVisitor, which is notified about the differences in all elements.

Parameters:

diffVisitor - the instance of the object that will observe found changes

Returns:

this instance of the CdsDiffProcessor

add

CdsDiffProcessor add(CdsDataProcessor.Filter filter,
 CdsDiffProcessor.DiffVisitor diffVisitor)

Adds a CdsDiffProcessor.DiffVisitor, which is notified about the differences in elements that match a given filter.

Parameters:

filter - the filter predicate (see CdsDataProcessor.Filter)

diffVisitor - the differ that will called notified about changes

Returns:

this instance of the CdsDiffProcessor

process

void process(Map<String,Object> newImage,
 Map<String,Object> oldImage,
 CdsStructuredType type)

Runs the CdsDiffProcessor on the new and old image of the data.

Parameters:

newImage - new image of the data

oldImage - old image of the data

type - the type of the data

process

void process(Iterable<? extends Map<String,Object>> newImages,
 Iterable<? extends Map<String,Object>> oldImages,
 CdsStructuredType type)

Runs the CdsDiffProcessor on the new and old images of the data represented as a collection of entries or an instances of the Result

Parameters:

newImages - sequence of the new images of the data

oldImages - sequence of the old images of the data

type - the type of the data