diff -r 2a9601315dfc -r 98ccebc37403 javauis/amms_qt/javasrc/com/nokia/amms/AMMSError.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/amms_qt/javasrc/com/nokia/amms/AMMSError.java	Fri May 14 15:47:24 2010 +0300
@@ -0,0 +1,85 @@
+/*
+* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+package com.nokia.amms;
+
+import javax.microedition.media.MediaException;
+import com.nokia.microedition.media.NativeError;
+
+/**
+ * This class contains general helper methods for error conversion
+ * between native side and java side.
+ */
+public final class AMMSError
+{
+    /**
+     * Private, because this class is not intended to be constructed.
+     */
+    private AMMSError()
+    {
+    }
+
+    /**
+     * This method throws IllegalStateException if error code is
+     * KErrNotReady (-18)
+     *
+     * @param aNativeErrorCode Native error code.
+     */
+    static public void checkIllegalState(int aNativeErrorCode)
+    {
+        if (aNativeErrorCode == NativeError.KErrNotReady)
+        {
+            throw new IllegalStateException();
+        }
+    }
+
+    /**
+     * This method throws MediaException if checked native error
+     * code is below KErrNone.
+     * @param aNativeErrorCode Native error code.
+     */
+    static public void checkMediaException(int aNativeErrorCode)
+    throws MediaException
+    {
+        NativeError.checkOOMOnly(aNativeErrorCode);
+        if (aNativeErrorCode < NativeError.KErrNone)
+        {
+            throw new MediaException();
+        }
+    }
+    /**
+     * @param aObject Object to be checked.
+     */
+    static public void checkArgument(Object aObject)
+    {
+        if (aObject == null)
+        {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    /**
+     * Checks for basic native error codes that map to standard Java
+     * exceptions and throws the exception if the error code matches.
+     * Otherwise throws basic Error class.
+     * @param aNativeErrorCode Native error code.
+     */
+    static public void check(int aNativeErrorCode)
+    {
+        NativeError.check(aNativeErrorCode);
+    }
+}