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Old 10-13-2008, 06:26 AM   #1 (permalink)
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Default Best way of changing application permissions

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Hello,

I know this has been answered many times in the forums, but I just wanted to know if the next piece of code is a good way to check and change the permissions of my application.

Code:
 public static void changeApplicationPermissions() {		
		try {
			Vector vNewPermissions;
			for(int i=0; i < 3; i++)
			{
				vNewPermissions = this.checkApplicationPermissions();
				if(vNewPermissions != null)				
					this.modifyApplicationPermissions(vNewPermissions);					
				
				if((vNewPermissions != null) && (i == 2))
				{
					BBUtilities.launchDialogScreen("MyApplication is not able to work because it doesn't have enough permissions to work correctly." +
					"\MyApplication will be closed.");					
					System.exit(0);
				}
				else
					break;
			}				
		} catch (final MyApplication e1) {
			UiApplication.getUiApplication().invokeLater(new Runnable() {
				public void run() {
					Dialog.alert(e1.getMessage());
					System.exit(0);
				}
			});
			return;
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
	
	public static final Vector checkApplicationPermissions() throws MyApplicationException
	{		
		try
		{			
			ApplicationPermissions permissions = ApplicationPermissionsManager.getInstance().getApplicationPermissions();
			Vector permissionsToChange = null;			
			int[] p;						
			int i;			
			
			p = new int[] { ApplicationPermissions.PERMISSION_AUTHENTICATOR_API,
							ApplicationPermissions.PERMISSION_CHANGE_DEVICE_SETTINGS,
							ApplicationPermissions.PERMISSION_CODE_MODULE_MANAGEMENT,
							ApplicationPermissions.PERMISSION_EMAIL,
							ApplicationPermissions.PERMISSION_EVENT_INJECTOR,
							ApplicationPermissions.PERMISSION_EXTERNAL_CONNECTIONS,							
							ApplicationPermissions.PERMISSION_FILE_API,
							ApplicationPermissions.PERMISSION_INTERNAL_CONNECTIONS,
							ApplicationPermissions.PERMISSION_HANDHELD_KEYSTORE,
							ApplicationPermissions.PERMISSION_LOCAL_CONNECTIONS,
							ApplicationPermissions.PERMISSION_PHONE	
						};		
			
			for(i = 0; i< p.length; i++)
			{				
				if(permissions.containsPermissionKey(p[i]))					
					if(permissions.getPermission(p[i]) != ApplicationPermissions.VALUE_ALLOW)
					{
						if(permissionsToChange == null)
							permissionsToChange = new Vector();						
						permissionsToChange.addElement(new Integer(p[i]));
					}
			}
			
			return permissionsToChange;
			
		}catch (Exception e) {		
			throw new MyApplicationException("MyApplication doesn't have enough permissions to work correctly.\MyApplication will be closed."+e.getMessage());
		}
	}	

	public static final boolean modifyApplicationPermissions(Vector vNewPermissions) throws MyApplicationException
	{		
		try{
			ApplicationPermissions permissions = ApplicationPermissionsManager.getInstance().getApplicationPermissions();
			for(int i = 0 ; i < vNewPermissions.size(); i++)
				permissions.addPermission(((Integer)vNewPermissions.elementAt(i)).intValue());				
			return ApplicationPermissionsManager.getInstance().invokePermissionsRequest(permissions);
		}catch (Exception e) {
			throw new MyApplicationException("MyApplication doesn't have enough permissions to work correctly.\MyApplication will be closed.");
		}		
	}
Do you think is better to change the permissions when the user launches the application than letting the BB prompts the user when a resource without permission is going to be used?

Does someone know which is the best way of doing this? Because I still don't have this clear enough and haven't found info related with it...

Thank you!
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Old 10-15-2008, 05:30 AM   #2 (permalink)
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Default

I cannot believe that nobody has done something similar to this, my only question is how should I change permissions of the application. With my solution I have a bug because for those permissions that I don't want to be allowed BB automatically change them to DENY, which is a bit weird...

Am I doing something wrong?
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