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OpenCms is an enterprise-ready, easy to use website content management system based on Java and XML technology. Offering a complete set of features, OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

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/*
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
 *
 * 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.
 *
 * For further information about Alkacon Software GmbH & Co. KG, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.db.db2;

import org.opencms.db.CmsSelectQuery.TableAlias;
import org.opencms.db.CmsSimpleQueryFragment;
import org.opencms.db.I_CmsQueryFragment;
import org.opencms.db.generic.CmsSqlManager;
import org.opencms.db.generic.CmsUserQueryBuilder;

import com.google.common.base.Joiner;

/**
 * DB2 implementation of the user driver methods.
 *
 * @since 7.0.3
 */
public class CmsUserDriver extends org.opencms.db.generic.CmsUserDriver {

    /**
     * @see org.opencms.db.generic.CmsUserDriver#createUserQueryBuilder()
     */
    @Override
    public CmsUserQueryBuilder createUserQueryBuilder() {

        return new CmsUserQueryBuilder() {

            /**
             * @see org.opencms.db.generic.CmsUserQueryBuilder#createFlagCondition(org.opencms.db.CmsSelectQuery.TableAlias, int)
             */
            @Override
            protected I_CmsQueryFragment createFlagCondition(TableAlias users, int flags) {

                return new CmsSimpleQueryFragment(
                    "BITAND(" + users.column("USER_FLAGS") + ", ?) = ? ",
                    new Integer(flags),
                    new Integer(flags));
            }

            /**
             * @see org.opencms.db.generic.CmsUserQueryBuilder#generateConcat(java.lang.String[])
             */
            @Override
            protected String generateConcat(String... expressions) {

                return Joiner.on(" || ").join(expressions);
            }

            /**
             * @see org.opencms.db.generic.CmsUserQueryBuilder#getUserFlagExpression(org.opencms.db.CmsSelectQuery.TableAlias, int)
             */
            @Override
            protected String getUserFlagExpression(TableAlias users, int flags) {

                return "BITAND(" + users.column("USER_FLAGS") + ", " + flags + ")";

            }

            /**
             * @see org.opencms.db.generic.CmsUserQueryBuilder#useWindowFunctionsForPaging()
             */
            @Override
            protected boolean useWindowFunctionsForPaging() {

                return true;
            }
        };
    }

    /**
    * @see org.opencms.db.I_CmsUserDriver#initSqlManager(String)
    */
    @Override
    public org.opencms.db.generic.CmsSqlManager initSqlManager(String classname) {

        return CmsSqlManager.getInstance(classname);
    }

}