Blackberry JAVA DEVELOPMENT ENVIRONMENT - - CRYPTOGRAPHIC SMART CARD DRIVER - DEVELOPMENT GUIDE Guia de Resolução de Problemas descarregar pdf (Página 88)

BlackBerry Java Development Environment Development Guide

Add support for backing up data with the BlackBerry Desktop Software

Task Steps

Let your application maintain a

collection of synchronized objects,

producing and processing valid

synchronization data when creating a

SyncObject.

Implement the SyncCollection and SyncConverter interfaces by the same class or by separate

classes, depending on the design of the application.

> Change the main class for the application to implement the SyncCollection and

SyncConverter interfaces.

public class RestaurantsSync extends UiApplication implements

RestaurantsSyncResource,SyncCollection, SyncConverter

Let persistable objects be

synchronization objects.

> Modifiy a class that implements the Persistable interface to implement the SyncObject

interface.

private static final class RestaurantInfo implements Persistable,

SyncObject

Create a unique ID for a

synchronization object.

> In the persistable class, create an instance variable for storing a unique ID for synchronization

operations.

private int _uid;

Let your main application retrieve the

unique ID of the synchronization

object.

> In the persistable class, implement the getUID() method to return a unique ID for

synchronization operations.

public int getUID() {

return _uid;

}

Let your main application create a

synchronization object using a unique

ID.

> In the persistable class, create a constructor that accepts a unique ID as a parameter and sets the

_uid variable to this value.

public RestaurantInfo(int uid) {

_elements = new String[4];

for (int i = 0; i < _elements.length; ++i) {

_elements[i] = "";

}

_uid = uid;

}

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