/*

 * This file is part of libbluray

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library. If not, see

 * <http://www.gnu.org/licenses/>.

 */

package org.videolan;

import java.util.Enumeration;

import java.util.Vector;

import org.dvb.application.AppAttributes;

import org.dvb.application.AppID;

import org.dvb.application.AppProxy;

import org.dvb.application.AppsDatabase;

import org.dvb.application.AppsDatabaseEvent;

import org.dvb.application.AppsDatabaseFilter;

import org.videolan.bdjo.AppEntry;

import org.videolan.bdjo.Bdjo;

public class BDJAppsDatabase extends AppsDatabase {

    private static final Object instanceLock = new Object();

    static public AppsDatabase getAppsDatabase() {

        synchronized (instanceLock) {

            if (instance == null)

                instance = new BDJAppsDatabase();

            return instance;

        }

    }

    private static final Object appTableLock = new Object();

    public int size() {

        synchronized (appTableLock) {

            if (appTable == null)

                return 0;

            return appTable.length;

        }

    }

    public Enumeration getAppIDs(AppsDatabaseFilter filter) {

        Vector ids = new Vector();

        synchronized (appTableLock) {

            if (appTable != null)

                for (int i = 0; i < appTable.length; i++)

                    if (filter.accept(appTable[i].getIdentifier()))

                        ids.add(appTable[i].getIdentifier());

        }

        return ids.elements();

    }

    public Enumeration getAppAttributes(AppsDatabaseFilter filter) {

        Vector attributes = new Vector();

        synchronized (appTableLock) {

            if (appTable != null)

                for (int i = 0; i < size(); i++)

                    if (filter.accept(appTable[i].getIdentifier()))

                        attributes.add(appTable[i]);

        }

        return attributes.elements();

    }

    public AppAttributes getAppAttributes(AppID key) {

        synchronized (appTableLock) {

            if (appTable != null)

                for (int i = 0; i < size(); i++)

                    if (key.equals(appTable[i].getIdentifier()))

                        return appTable[i];

        }

        return null;

    }

    public AppProxy getAppProxy(AppID key) {

        synchronized (appTableLock) {

            if ((appTable != null) && (appProxys != null))

                for (int i = 0; i < size(); i++)

                    if (key.equals(appTable[i].getIdentifier()))

                        return appProxys[i];

        }

        return null;

    }

    public Bdjo getBdjo() {

        return bdjo;

    }

    protected void newDatabase(Bdjo bdjo, BDJAppProxy[] appProxys) {

        synchronized (appTableLock) {

            this.bdjo = bdjo;

            this.appProxys = appProxys;

            this.appTable = (bdjo != null) ? bdjo.getAppTable() : null;

        }

        notifyListeners(AppsDatabaseEvent.NEW_DATABASE, null);

    }

    private Bdjo bdjo = null;

    private BDJAppProxy[] appProxys = null;

    private AppEntry[] appTable = null;

    private static BDJAppsDatabase instance = null;

}