| Package | mx.data |
| Class | public class ConflictDetector |
| Inheritance | ConflictDetector  Object |
| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
It has three methods that are used to determine if a conflict exists when
processing a pushed operation, checkCreate(), checkDelete(), and
checkUpdate().
Each of these methods is called for the corresponding operation with two
parameters, the local and the remote change.
If you want to customize how conflicts are detected on the client, you can extend this class and augment the behavior as needed to match remote assembler logic.
The following code provides examples of how these methods can be used to indicate a conflict has occurred. Conflicts are always indicated on the remoteChange.
Public Properties
Hide Inherited Public Properties
Show Inherited Public PropertiesPublic Methods
| Method | Defined By | ||
|---|---|---|---|
ConflictDetector(dataService:ConcreteDataService)
Constructs an instance of the default conflict detection mechanism. | ConflictDetector | ||
Called by the DataService when a create
operation is pushed/processed from the remote destination. | ConflictDetector | ||
Called by the DataService when a delete
operation is pushed/processed from the remote destination. | ConflictDetector | ||
Called by the DataService when a remove from fill
operation is pushed/processed from the remote destination. | ConflictDetector | ||
Called by the DataService when an update
operation is pushed/processed from the remote destination. | ConflictDetector | ||
 |
Indicates whether an object has a specified property defined. | Object | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
|
Indicates whether the specified property exists and is enumerable. | Object | |
|
Sets the availability of a dynamic property for loop operations. | Object | |
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
|
Returns the primitive value of the specified object. | Object | |
Constructor Detail
ConflictDetector | () | Constructor |
public function ConflictDetector(dataService:ConcreteDataService)| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Constructs an instance of the default conflict detection mechanism.
ParametersdataService:ConcreteDataService — ConcreteDataService reference to the data service
that will use this conflict detector.
|
Method Detail
checkCreate | () | method |
public function checkCreate(remoteChange:IChangeObject, localChange:IChangeObject):void| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Called by the DataService when a create operation is pushed/processed from the remote destination.
Parameters
remoteChange:IChangeObject — IChangeObject representing the remote change being
processed.
| |
localChange:IChangeObject — IChangeObject representing any local changes made
to the same object referenced by the remoteChange parameter.
This value can be null if no local changes have been made
to the item represented by the remoteChange parameter.
|
checkDelete | () | method |
public function checkDelete(remoteChange:IChangeObject, localChange:IChangeObject):void| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Called by the DataService when a delete operation is pushed/processed from the remote destination.
Parameters
remoteChange:IChangeObject — IChangeObject representing the remote change being
processed.
| |
localChange:IChangeObject — IChangeObject representing any local changes made
to the same object referenced by the remoteChange parameter.
This value can be null if no local changes have been made
to the item represented by the remoteChange parameter.
|
checkRemoveFromFill | () | method |
public function checkRemoveFromFill(localChange:IChangeObject, fillParameters:Object):void| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Called by the DataService when a remove from fill operation is pushed/processed from the remote destination.
Parameters
localChange:IChangeObject — IChangeObject representing the local version of the
item that the server is telling us to remove from the specified dill
| |
fillParameters:Object — fill parameters identifying the fill from which the item
is to be removed.
|
checkUpdate | () | method |
public function checkUpdate(remoteChange:IChangeObject, localChange:IChangeObject):void| Language Version: | ActionScript 3.0 |
| Product Version: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Called by the DataService when an update operation is pushed/processed from the remote destination.
Parameters
remoteChange:IChangeObject — IChangeObject representing the remote change being
processed.
| |
localChange:IChangeObject — IChangeObject representing any local changes made
to the same object referenced by the remoteChange parameter.
This value can be null if no local changes have been made
to the item represented by the remoteChange parameter.
|
Examples How to use this example
override public function checkCreate(remoteChange:IChangeObject,
localChange:IChangeObject):void
{
// if we have created a local item that is the same item as the remote
// change then we have a conflict
if (localChange != null &&
ObjectUtil.compare(remoteChange.identity, localChange.identity) == 0)
{
remoteChange.conflict("Local created item is in conflict with remotely created item",
localChange.changedPropertyNames);
}
}
override public function checkDelete(remoteChange:IChangeObject,
localChange:IChangeObject):void
{
// if we have an update locally for an item that was deleted remotely
// that is considered a conflict.
if (localChange != null)
{
if (localChange.isUpdate())
{
remoteChange.conflict("Local item was updated and is in conflict with pushed delete.",
localChange.changedPropertyNames);
}
}
}
override public function checkUpdate(remoteChange:IChangeObject,
localChange:IChangeObject):void
{
// get a list of all of the changed properties
var changes:Array = remoteChange.changedPropertyNames;
// get the remote state of the item's properties
var newVersion:Object = remoteChange.newVersion;
var prevVersion:Object = localChange.previousVersion;
// properties will be in conflict if the old value of a property on the
// local item is different from the same property value of the new version
// of the remote item.
var conflictingProps:Array = [];
for (var i:int=0; i<changes.length; i++)
{
var prop:Object = changes[i]; // could be a String or QName
if (ObjectUtil.compare(prevVersion[prop], newVersion[prop]) != 0)
{
conflictingProps.push(prop);
}
}
if (conflictingProps.length > 0)
{
remoteChange.conflict("Local item has changes to properties that conflict with remote change.",
conflictingProps);
}
}
Mon Nov 28 2011, 06:48 AM -08:00