/*

* Copyright (c) 2009 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.mj.impl.rt.midp;

/**

 */

final class DrmUtil

{

    /**

     * A pointer to native peer.

     */

    private static int mNativeHandle = 0;

    /*** ----------------------------- PACKAGE ---------------------------- */

    /**

     * Signals the DRM engine that the MIDlet is about to start. If there are

     * no rights to start MIDlet any more, then a error dialog is prompted to

     * the user and an exception will be thrown.

     * The signalling and checking is done only to DRM protected MIDlets.

     * @throws StartupException if not allowed to start.

     */

    static void consumeRightsStart()

    {

        if (Log.mOn) Log.logI("Verifying MIDlet Suite DRM rights.");

        MidletInfo midletInfo = ApplicationInfoImpl.getMidletInfo();

        if (midletInfo.getDrm())

        {

            // This causes the VM to open application's Jar

            // file during the startup phase. CAF panics for some reason

            // without this. Probably the reson is that the file is opened

            // from different thread than where it is closed.

            Object clazz = null;

            try

            {

                clazz = Class.forName("com.nokia.mj.foofoofoo.foofoofoo")

                        .newInstance();

            }

            catch (Exception e)

            {

            }

            Object result = _consumeRights(midletInfo.getClassPath(),

                                           midletInfo.getContentId(), true, 0);

            if (result instanceof String)

            {

                RuntimeErrorDialog.getDrmExpiredDialog().showDialog();

                throw new StartupException("Rights object check failed. '" +

                                           result+"'", false);

            }

            else

            {

                mNativeHandle = ((Integer)result).intValue();

            }

        }

    }

    /**

     * Signals the DRM engine that the MIDlet is about to close.

     * The signalling and checking is done only to DRM protected MIDlets.

     */

    static void consumeRightsStop()

    {

        MidletInfo midletInfo = ApplicationInfoImpl.getMidletInfo();

        if (mNativeHandle != 0 && midletInfo != null && midletInfo.getDrm())

        {

            if (Log.mOn) Log.logI("Ending DRM right consuming.");

            _consumeRights(midletInfo.getClassPath(),

                           midletInfo.getContentId(),

                           false,

                           mNativeHandle);

            mNativeHandle = 0;

        }

    }

    /*** ----------------------------- PRIVATE ---------------------------- */

    /**

     * Constructor of DrmUtil not allowed.

     */

    DrmUtil()

    {

    }

    /*** ----------------------------- NATIVE ----------------------------- */

    /**

    * Will decrement applicable stateful rights such as play counts where

    * necessary.

    * @param uri Uri for the file.

    * @param drmContentId  A unique DRM content id.

    * @param startPhase true if starting the MIDlet, false on closing.

    * @return Status string of the operation. Will be empty on success

    *         cases, but will contain some understandable error text

    *         in failure cases.

    */

    private static native Object _consumeRights(String uri,

            String drmContentId,

            boolean startPhase,

            int handle);

}