001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software GmbH & Co. KG, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.db.postgresql;
029
030import org.opencms.db.generic.CmsSqlManager;
031import org.opencms.db.generic.CmsUserQueryBuilder;
032
033import com.google.common.base.Joiner;
034
035/**
036 * PostgreSql implementation of the user driver methods.<p>
037 *
038 * @since 6.0.0
039 */
040public class CmsUserDriver extends org.opencms.db.generic.CmsUserDriver {
041
042    /**
043     * @see org.opencms.db.generic.CmsUserDriver#createUserQueryBuilder()
044     */
045    @Override
046    public CmsUserQueryBuilder createUserQueryBuilder() {
047
048        return new CmsUserQueryBuilder() {
049
050            /**
051             * @see org.opencms.db.generic.CmsUserQueryBuilder#generateConcat(java.lang.String[])
052             */
053            @Override
054            protected String generateConcat(String... expressions) {
055
056                return Joiner.on(" || ").join(expressions);
057            }
058
059            /**
060             * @see org.opencms.db.generic.CmsUserQueryBuilder#shouldNameSubqueries()
061             */
062            @Override
063            protected boolean shouldNameSubqueries() {
064
065                return true;
066            }
067
068            /**
069             * @see org.opencms.db.generic.CmsUserQueryBuilder#useWindowFunctionsForPaging()
070             */
071            @Override
072            protected boolean useWindowFunctionsForPaging() {
073
074                return false;
075            }
076        };
077    }
078
079    /**
080     * @see org.opencms.db.I_CmsUserDriver#initSqlManager(String)
081     */
082    @Override
083    public org.opencms.db.generic.CmsSqlManager initSqlManager(String classname) {
084
085        return CmsSqlManager.getInstance(classname);
086    }
087
088}