```
public class Evolution
extends Object
```
A Feature Evolution. It keeps a clone of the previous state of the feature ( null for a creation) and the new state of the feature (null for a suppression).

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Evolution`	`createCreation(Feature feature)`
`static Evolution`	`createModification(Feature feature, Feature old)`
`static Evolution`	`createSuppression(Feature feature)`
`Feature`	`getNewFeature()`
`Feature`	`getOldFeature()`
`Evolution.Type`	`getType()`
`Evolution`	`mergeToPrevious(Evolution previous)`
`String`	`toString()`

public static Evolution createCreation(Feature feature)

public static Evolution createModification(Feature feature,
                                           Feature old)

public static Evolution createSuppression(Feature feature)

public Evolution mergeToPrevious(Evolution previous)
                          throws EvolutionOperationException

Class Evolution