/*

* Copyright (c) 1999 - 2004 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 javax.microedition.lcdui;

import com.nokia.mj.impl.rt.legacy.NativeError;

import com.nokia.mj.impl.rt.support.Finalizer;

public class Ticker

{

    final Toolkit iToolkit;

    private int iHandle;

    private String iText;

    private Finalizer mFinalizer;

    public Ticker(String aText)

    {

        if (null == aText)

        {

            throw new NullPointerException();

        }

        mFinalizer = new Finalizer()

        {

            public void finalizeImpl()

            {

                doFinalize();

            }

        };

        Toolkit toolkit = Toolkit.getToolkit();

        synchronized (toolkit)

        {

            iToolkit = toolkit;

            iHandle  = Toolkit.checkHandle(_create(toolkit.getHandle(), aText));

            iText    = aText;

        }

    }

    public void setString(String aText)

    {

        if (null == aText)

        {

            throw new NullPointerException();

        }

        synchronized (iToolkit)

        {

            if (iHandle <= 0) throw new RuntimeException("bad handle");

            NativeError.check(_setText(iHandle,iToolkit.getHandle(),aText));

            iText = aText;

        }

    }

    public String getString()

    {

        return iText;

    }

    int getHandle()

    {

        if (iHandle <= 0)

        {

            throw new RuntimeException("Ticker: bad handle " + iHandle);

        }

        return iHandle;

    }

    private void doFinalize()

    {

        if (mFinalizer != null)

        {

            registeredFinalize();

            mFinalizer = null;

        }

    }

    void registeredFinalize()

    {

        synchronized (iToolkit)

        {

            iToolkit.disposeObject(iHandle);

            iHandle=0;

        }

    }

    private native int _create(int aToolkit,String aText);

    private native int _setText(int aHandle,int aToolkit,String aText);

} // class Ticker