| 套件 | mx.data |
| 類別 | public class ConflictDetector |
| 繼承 | ConflictDetector  Object |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | 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.
隱藏繼承公用屬性
顯示繼承公用屬性公用方法
| 方法 | 定義自 | ||
|---|---|---|---|
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 | ||
 |
指出物件是否有已定義的指定屬性。 | Object | |
|
指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。 | Object | |
|
指出指定的屬性是否存在，以及是否可列舉。 | Object | |
|
為迴圈作業設定動態屬性的可用性。 | Object | |
|
傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
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會傳回指定之物件的字串形式。 | Object | |
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會傳回指定之物件的基本值。 | Object | |
建構函式詳細資料
ConflictDetector | () | 建構函式 |
public function ConflictDetector(dataService:ConcreteDataService)| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Constructs an instance of the default conflict detection mechanism.
參數dataService:ConcreteDataService — ConcreteDataService reference to the data service
that will use this conflict detector.
|
方法詳細資訊
checkCreate | () | 方法 |
public function checkCreate(remoteChange:IChangeObject, localChange:IChangeObject):void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Called by the DataService when a create operation is pushed/processed from the remote destination.
參數
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 | () | 方法 |
public function checkDelete(remoteChange:IChangeObject, localChange:IChangeObject):void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Called by the DataService when a delete operation is pushed/processed from the remote destination.
參數
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 | () | 方法 |
public function checkRemoveFromFill(localChange:IChangeObject, fillParameters:Object):void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Called by the DataService when a remove from fill operation is pushed/processed from the remote destination.
參數
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 | () | 方法 |
public function checkUpdate(remoteChange:IChangeObject, localChange:IChangeObject):void| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Called by the DataService when an update operation is pushed/processed from the remote destination.
參數
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.
|
範例 如何使用本範例
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);
}
}
Tue Jun 12 2018, 03:47 PM Z