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 

    19 package javax.microedition.m3g;

    20 

    21 /**

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

    23  * exceptions that occured when executing in UI thread.

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

    25  */

    26 abstract class M3gRunnable implements Runnable

    27 {

    28     private Throwable e = null;

    29 

    30     /**

    31      * From Runnable interface

    32      */

    33     public void run()

    34     {

    35         try

    36         {

    37             doRun();

    38         }

    39         catch (Throwable t)

    40         {

    41             e = t;

    42         }

    43     }

    44 

    45     /**

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

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

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

    49      * executed in UI thread

    50      *

    51      * @throws RuntimeException

    52      * @throws Error

    53      */

    54     public void checkAndThrow()

    55     {

    56         if (e == null)

    57         {

    58             return;

    59         }

    60         if (e instanceof RuntimeException)

    61         {

    62             throw(RuntimeException)e;

    63         }

    64         else if (e instanceof Error)

    65         {

    66             throw(Error)e;

    67         }

    68     }

    69 

    70     /**

    71      * Method to be implemented for the UI thead execution

    72      */

    73     abstract void doRun();

    74 }