/*

* Copyright (c) 2010 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.cenrep;

import com.nokia.mid.cenrep.CentralRepository;

import com.nokia.mid.cenrep.CentralRepositoryException;

import com.nokia.mj.impl.gcf.utils.NativeError;

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

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

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

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

/**

 * CentralRepositoryImpl implements the functionality specified in

 * com.nokia.mid.cenrep.CentralRepository class.

 */

public class CentralRepositoryImpl extends CentralRepository

{

    static

    {

        try

        {

            Jvm.loadSystemLibrary("javacentrep");

        }

        catch (Exception e)

        {

            Logger.ELOG(Logger.EJavaCentrep,

                        "Unable to load javacentrep dll.");

        }

    }

    private static final int INITIAL = 0;

    private static final int OPEN = 1;

    private static final int CLOSED = 2;

    /*

     * Central Repository API Function server.

     */

    private int iFunctionSourceHandle;

    /**

     * Handle to the native side peer object.

     */

    private int iCenrepHandle = 0;

    /**

     * Repository ID

     */

    private String iRepositoryId = null;

    private Finalizer iFinalizer;

    private int iState;

    /**

     *  Hidden default constructor.

     */

    private CentralRepositoryImpl()

    {

    }

    /**

     * Hidden constructor.

     *

     * @param repositoryId it is platform specific and in S60 it is

     *        Symbian Central Repository UID.

     */

    private CentralRepositoryImpl(String repositoryId)

    throws CentralRepositoryException

    {

        checkAccess();

        iState = INITIAL;

        int cenrepUid = CentralRepositoryUid.getIntValue(repositoryId);

        this.iRepositoryId = repositoryId;

        iFinalizer = registerFinalize();

        iFunctionSourceHandle = _createFunctionSource();

        iCenrepHandle = _createNativePeer(iFunctionSourceHandle, cenrepUid);

        iState = OPEN;

    }

    /**

     * See class CentralRepository for comments.

     */

    static public CentralRepository open(String repositoryId)

    throws CentralRepositoryException

    {

        return new CentralRepositoryImpl(repositoryId);

    }

    /**

     * See class CentralRepository for comments.

     */

    public void close() throws CentralRepositoryException

    {

        synchronized (this)

        {

            {

                iState = CLOSED;

                _close(iFunctionSourceHandle, iCenrepHandle);

                _dispose(iFunctionSourceHandle, iCenrepHandle);

            }

            iRepositoryId = null;

        }

    }

    /**

     * See class CentralRepository for comments.

     */

    public String getString(String key)

    throws CentralRepositoryException

    {

        synchronized (this)

        {

            if (iState == CLOSED)

            {

                throw new CentralRepositoryException("Connection Already Closed");

            }

            long cenrepKey = CentralRepositoryKey.getLongValue(key);

            String value = _getString(iFunctionSourceHandle, iCenrepHandle, cenrepKey);

            return value;

        }

    }

    /**

     * See class CentralRepository for comments.

     */

    public int getInt(String key)

    throws CentralRepositoryException

    {

        synchronized (this)

        {

            if (iState == CLOSED)

            {

                throw new CentralRepositoryException("Connection Already Closed");

            }

            long cenrepKey = CentralRepositoryKey.getLongValue(key);

            int res = _getInt(iFunctionSourceHandle, iCenrepHandle, cenrepKey);

            return res;

        }

    }

    /**

     * See class CentralRepository for comments.

     */

    public void setString(String key, String value)

    throws CentralRepositoryException

    {

        synchronized (this)

        {

            if (iState == CLOSED)

            {

                throw new CentralRepositoryException("Connection Already Closed");

            }

            long cenrepKey = CentralRepositoryKey.getLongValue(key);

            if (value == null)

            {

                throw new CentralRepositoryException("Value is null");

            }

            _setString(iFunctionSourceHandle, iCenrepHandle, cenrepKey, value);

        }

    }

    /**

     * See class CentralRepository for comments.

     */

    public  void setInt(String key, int value)

    throws CentralRepositoryException

    {

        synchronized (this)

        {

            if (iState == CLOSED)

            {

                throw new CentralRepositoryException("Connection Already Closed");

            }

            long cenrepKey = CentralRepositoryKey.getLongValue(key);

            _setInt(iFunctionSourceHandle, iCenrepHandle, cenrepKey, value);

        }

    }

    /**

     * Registers with Finalizer to call a method when the object gets collected

     * by GC

     *

     * @return Finalizer object that will be notified when GC happens

     */

    private Finalizer registerFinalize()

    {

        return new Finalizer()

        {

            public void finalizeImpl()

            {

                registeredFinalize();

            }

        };

    }

    /**

     * Called when the object is finalized by the garbage collector.

     */

    final void registeredFinalize()

    {

        try

        {

            close();

        }

        catch (CentralRepositoryException e)

        {

            // Ignore

        }

    }

    /**

     * Creates a native side function source.

     *

     * @return handle to the native function source.

     */

    private native int _createFunctionSource();

    /**

     * Create native side peer of this Java class. It opens a repository.

     *

     * @param FunctionSource Handle handle to the native function source.

     * @param arepositoryId is platform specific and in S60 it is

     *        Symbian Central Repository UID.

     * @return handle to the native side peer.

     * @return Symbian OS error code, if openning fails.

     */

    private native int _createNativePeer(

        int aFunctionSourceHandle,

        int repositoryId);

    /**

     * Closes a repository.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     * @return Symbian OS error code, if closing fails.

     */

    private native void _close(int aFunctionSourceHandle, int cenrepHandle);

    /**

     * Dispose native side resources owned by this class.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     */

    private native void _dispose(int aFunctionSourceHandle, int cenrepHandle);

    /**

     * Returns string stored in given key.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     * @param key the key of setting to be read.

     * @param value returns the value of the setting if it is the string.

     * @return Symbian OS error code, if key is not found or

     *         stored data is not string.

     */

    private native String _getString(

        int aFunctionSourceHandle,

        int cenrepHandle,

        long key);

    /**

     * Returns integer stored in given key.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     * @param key the key of setting to be read.

     * @param value the value of the setting if it is an integer.

     * @return Symbian OS error code, if key is not found or

     *         stored data is not integer.

     */

    private native int _getInt(

        int aFunctionSourceHandle,

        int cenrepHandle,

        long key);

    /** Stores string value in key.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     * @param key the key of setting to be stored.

     * @param value the string value of the setting to be stored.

     * @return Symbian OS error code, if string value cannot be stored.

     */

    private native void _setString(

        int aFunctionSourceHandle,

        int cenrepHandle,

        long key,

        String value);

    /** Stores integer value in key.

     *

     * @param FunctionSourceHandle handle to the native function source.

     * @param cenrepHandle handle to the native side peer object.

     * @param key the key of setting to be stored.

     * @param value the integer value of the setting to be stored.

     * @return Symbian OS error code, if integer value cannot be stored.

     */

    private native void _setInt(

        int aFunctionSourceHandle,

        int cenrepHandle,

        long key,

        int value);

    /**

     * Checks if MIDlet is permited to access the central repository.

     * Only MIDlets in manufacturer or operator domain are allowed.

     * @throws CentralRepositoryException if MIDlet is not in manufacturer or

     *        operator domain.

     */

    private void checkAccess()

    throws SecurityException

    {

        ApplicationInfo appInfo = ApplicationInfo.getInstance();

        String protectionDomain = appInfo.getProtectionDomain();

        if (protectionDomain.equals(ApplicationInfo.MANUFACTURER_DOMAIN) == false &&

                protectionDomain.equals(ApplicationInfo.OPERATOR_DOMAIN) == false)

        {

            Logger.ELOG(Logger.EJavaCentrep, "Protection Domain: " + protectionDomain +

                        ", Access denied");

            throw new SecurityException("Access denied!");

        }

    }

}