Package net.officefloor.model.impl.change

Class AggregateChange<T>

java.lang.Object

net.officefloor.model.impl.change.AggregateChange<T>

All Implemented Interfaces:

Change<T>

public class AggregateChange<T>
extends Object
implements Change<T>

Aggregates multiple Change instances into a single Change.

Author:

Daniel Sagenschneider

Constructor Summary

Constructors

Constructor	Description
AggregateChange(T target, String changeDescription, Change<?>... changes)	Initiate.

Method Summary

Modifier and Type	Method	Description
static <T> Change<T>	aggregate(Change<T> change, Change<?>... changes)	Aggregates the Change instances, basing resulting Change on first Change.
void	apply()	Applies this Change.
boolean	canApply()	Indicates if can apply this Change.
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).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AggregateChange

public AggregateChange(T target,
 String changeDescription,
 Change<?>... changes)

Initiate.

Parameters:

target - Target.

changeDescription - Change description.

changes - Change instances.

Method Details

aggregate

public static <T> Change<T> aggregate(Change<T> change,
 Change<?>... changes)

Aggregates the Change instances, basing resulting Change on first Change.

Type Parameters:

T - Target type.

Parameters:

change - First Change.

changes - Further Change instances to aggregate.

Returns:

Change aggregating the input Change instances.

getTarget

public T getTarget()

Description copied from interface: Change

Obtains the target to which this Change applies.

Specified by:

getTarget in interface Change<T>

Returns:

Target to which this Change applies.

getChangeDescription

public String getChangeDescription()

Description copied from interface: Change

Obtains a description of the Change.

Specified by:

getChangeDescription in interface Change<T>

Returns:

Description of the Change.

canApply

public boolean canApply()

Description copied from interface: Change

Indicates if can apply this Change.

Typically there will be Conflict instances providing detail on why the Change can not be applied.

Specified by:

canApply in interface Change<T>

Returns:

true if can apply this Change.

See Also:

• Change.getConflicts()

apply

public void apply()

Description copied from interface: Change

Applies this Change.

Specified by:

apply in interface Change<T>

revert

public void revert()

Description copied from interface: Change

Reverts this Change (after being applied).

This enables do/undo functionality.

Specified by:

revert in interface Change<T>

getConflicts

public Conflict[] getConflicts()

Description copied from interface: Change

Obtains the Conflict instances preventing this Change from being applied.

A Change can only be applied if this returns an empty array.

Specified by:

getConflicts in interface Change<T>

Returns:

Any Conflict instances preventing applying this Change.