1 /*

     2 * Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 package com.nokia.microedition.m2g;

    19 

    20 /**

    21  * Class that wraps runnable in order to catch and forward

    22  * exceptions that occured when executing in UI thread.

    23  * This class is used only for running native methods in UI thread.

    24  */

    25 abstract class M2GRunnableQt implements Runnable

    26 {

    27     private Throwable e = null;

    28 

    29     /**

    30      * From Runnable interface

    31      */

    32     public void run()

    33     {

    34         try

    35         {

    36             doRun();

    37         }

    38         catch (Throwable t)

    39         {

    40             e = t;

    41         }

    42     }

    43 

    44     /**

    45      * Checks for possible exceptions and errors and throws them forward.

    46      * Only unchecked exceptions and errors are thrown as only checked

    47      * exception that m3gcore may throw comes from loader which is not

    48      * executed in UI thread

    49      *

    50      * @throws RuntimeException

    51      * @throws Error

    52      */

    53     public void checkAndThrow()

    54     {

    55         if (e == null)

    56         {

    57             return;

    58         }

    59         if (e instanceof RuntimeException)

    60         {

    61             throw(RuntimeException)e;

    62         }

    63         else if (e instanceof Error)

    64         {

    65             throw(Error)e;

    66         }

    67     }

    68 

    69     /**

    70      * Method to be implemented for the UI thead execution

    71      */

    72     abstract void doRun();

    73 }