de.aristaflow.adept2.model.common.changetracking

Interface ChangeCombiner

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

DifferentChangeCombiner, EqualChangeCombiner, SimilarChangeCombiner

public interface ChangeCombiner
extends java.io.Serializable

Combines two changes depending on how they relate to each other. For instance when changing the very same property value, this is an equal change and therefore ADDED and REMOVED combined are a no-op. Obviously this does not apply to different property values were the combination of ADDED and REMOVED is CHANGED.

Author:

Ulrich Kreher

Field Summary

Fields

Modifier and Type	Field and Description
static ChangeCombiner	DIFFERENT_CHANGES The changes are different and therefore most combinations of changes lead to CHANGED.
static ChangeCombiner	EQUAL_CHANGES The changes are equal, for instance ADDED and REMOVED as well as REMOVED and ADDED are no-ops.
static long	serialVersionUID Generated ID for serialisation.
static ChangeCombiner	SIMILAR_CHANGES The changes are similar, for instance ADDED and REMOVED is a no-op but REMOVED and ADDED is CHANGED.

Method Summary

Modifier and Type	Method and Description
ChangeType	combineChanges(ChangeType type1, ChangeType type2) Combines two changes, for a property.

Field Detail

serialVersionUID

static final long serialVersionUID

Generated ID for serialisation.

See Also:

Constant Field Values

EQUAL_CHANGES

static final ChangeCombiner EQUAL_CHANGES

The changes are equal, for instance ADDED and REMOVED as well as REMOVED and ADDED are no-ops.

SIMILAR_CHANGES

static final ChangeCombiner SIMILAR_CHANGES

The changes are similar, for instance ADDED and REMOVED is a no-op but REMOVED and ADDED is CHANGED.

DIFFERENT_CHANGES

static final ChangeCombiner DIFFERENT_CHANGES

The changes are different and therefore most combinations of changes lead to CHANGED.

Method Detail

combineChanges

ChangeType combineChanges(ChangeType type1,
                          ChangeType type2)

Combines two changes, for a property.

Parameters:

type1 - The first change to combine. null is treated as NONE.

type2 - The second change to combine. null is treated as NONE.

Returns:

The combination of the two changes relative to a property.