Change (OfficeFloor 3.33.0 API)

All Known Subinterfaces:

ChangeList<T>

All Known Implementing Classes:

AbstractChange, AggregateChange, DisconnectChange, NoChange
```
public interface Change<T>
```
A change to be applied/reverted.
All operations utilise this to enable do/undo functionality.

Author:

Daniel Sagenschneider

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`apply()`	Applies this `Change`.
`boolean`	`canApply()`	Indicates if can apply this `Change`.
`java.lang.String`	`getChangeDescription()`	Obtains a description of the `Change`.
`Conflict[]`	`getConflicts()`	Obtains the `Conflict` instances preventing this `Change` from being applied.
`T`	`getTarget()`	Obtains the target to which this `Change` applies.
`void`	`revert()`	Reverts this `Change` (after being applied).

- Method Detail
  - getTarget
```
T getTarget()
```
    Obtains the target to which this Change applies.
    
    Returns:
    
    Target to which this Change applies.
  - getChangeDescription
```
java.lang.String getChangeDescription()
```
    Obtains a description of the Change.
    
    Returns:
    
    Description of the Change.
  - canApply
```
boolean canApply()
```
    Indicates if can apply this Change.
    Typically there will be Conflict instances providing detail on why the Change can not be applied.
    
    Returns:
    
    true if can apply this Change.
    
    See Also:
    
    getConflicts()
  - apply
```
void apply()
```
    Applies this Change.
  - revert
```
void revert()
```
    Reverts this Change (after being applied).
    This enables do/undo functionality.
  - getConflicts
```
Conflict[] getConflicts()
```
    Obtains the Conflict instances preventing this Change from being applied.
    A Change can only be applied if this returns an empty array.
    
    Returns:
    
    Any Conflict instances preventing applying this Change.