// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.joy.page.db;
import jodd.joy.page.DbPager;
/**
* MySql database pager.
*/
public class MySqlPager extends DbPager {
/**
* Appends ORDER BY keyword.
*/
@Override
protected String buildOrderSql(String sql, String column, boolean ascending) {
sql += " order by " + column;
if (!ascending) {
sql += " desc";
}
return sql;
}
/**
* Builds page SQL using <code>limit</code> keyword.
* Uses SQL_CALC_FOUND_ROWS for {@link #buildCountSql(String)}.
*/
@Override
protected String buildPageSql(String sql, int from, int pageSize) {
sql = removeSelect(sql);
return "select SQL_CALC_FOUND_ROWS " + sql + " limit " + from + ", " + pageSize;
}
/**
* Returns FOUND_ROWS() sql to determine total count of founded rows.
*/
@Override
protected String buildCountSql(String sql) {
return "SELECT FOUND_ROWS()";
}
}