/*

* Copyright (c) 2008 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.fileutils;

import com.nokia.mj.impl.utils.Logger;

/**

 * Manages DRM Content. Provides utility to check if a given file is DRM

 * protected.

 *

 */

public class FileDRMContentHandler extends FileStreamHandler

{

    public static final int Peek = 0; // Intent to peek at content.

    public static final int Play = 1; // Intent to play content.

    public static final int View = 2; // Intent to view content.

    public static final int Execute = 3; // Intent to execute content.

    public static final int Print = 4; // Intent to print content.

    /**

     * Checks to see if the file name presented is DRM protected.

     *

     * @param aFileName

     *            absolute path of the file.

     * @return true in case it is DRM protected content. False otherwise.

     */

    public static boolean isDRMProtectedFile(String aFileName)

    {

        if (null == aFileName)

        {

            throw new NullPointerException("Argument passed was null");

        }

        return _isProtectedFile(aFileName);

    }

    /**

     * Construction and usage of FileDRMContentHandler must be restricted to

     * FileUtility alone. It cannot be used as a stand alone class.

     *

     * @param aFileName

     *            name of the file.

     */

    FileDRMContentHandler(String aFileName)

    {

        this(aFileName, Execute, false);

    }

    FileDRMContentHandler(String aFileName, int aIntent, boolean aExecuteIntent)

    {

        super(aFileName);

        Logger.LOG(Logger.EJavaFile, Logger.EInfo,

                   "--> FileDRMContentHandler:Constructor:  Setting DRM Params");

        checkIntentParam(aIntent);

        _setDrmArguments(iNativeHandle, aExecuteIntent, aIntent);

    }

    /**

     * Checks to see if the intent specified is correct.

     *

     * @param aIntent

     *            intent specified by the user

     */

    private void checkIntentParam(int aIntent)

    {

        switch (aIntent)

        {

        case Peek: // Fallthrough

        case Play: // Fallthrough

        case View: // Fallthrough

        case Execute: // Fallthrough

        case Print:

            return;

        default:

            throw new IllegalArgumentException(

                "Specified DRM intent was incorrect");

        }

    }

    /**

     * Creates native DRM Handler

     */

    protected int createNativePeer(String aFileName)

    {

        Logger.LOG(Logger.EJavaFile, Logger.EInfo,

                   "--> FileDRMContentHandler:Createnativepeer");

        return _createDrmHandler(aFileName);

    }

    protected void closeFileStream()

    {

        // This is called only when changing attributes of a file.

        // In case it is a DRM file, it is not allowed. Throw security Exception

        throw new SecurityException("Permission denied");

    }

    private static native boolean _isProtectedFile(String aFileName);

    private native void _setDrmArguments(int aNativeHandle,

                                         boolean aExecuteIntent, int aIntent);

    private native int _createDrmHandler(String aFileName);

}