IChangeCallback (ph-commons 11.1.0 API)

Type Parameters:

DATATYPE - The type of object that is changed

All Superinterfaces:

ICallback
```
public interface IChangeCallback<DATATYPE>
extends ICallback
```
Simple notification interface.

Author:

Philip Helger

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`afterChange(DATATYPE aChangedObject)`	Called after the object changed.
`EContinue`	`beforeChange(DATATYPE aObjectToChange)`	Called before the object will be changed.

- Method Detail
  - beforeChange
```
@Nonnull
EContinue beforeChange(@Nonnull
                       DATATYPE aObjectToChange)
```
    Called before the object will be changed.
    
    Parameters:
    
    aObjectToChange - The object to be changed. Never null.
    
    Returns:
    
    EContinue.CONTINUE if the action may be performed. If the return value is EContinue.BREAK the action will not be performed.
  - afterChange
```
void afterChange(@Nonnull
                 DATATYPE aChangedObject)
```
    Called after the object changed.
    
    Parameters:
    
    aChangedObject - The changed object. Never null.