ChangeCombiner (AristaFlow Business Process Platform API)

All Superinterfaces:

Serializable

All Known Implementing Classes:

DifferentChangeCombiner, EqualChangeCombiner, SimilarChangeCombiner
```
public interface ChangeCombiner
extends 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	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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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.