net.sf.jasperreports.engine.util.JRQueryExecuterUtils Maven / Gradle / Ivy
/*
* ============================================================================
* GNU Lesser General Public License
* ============================================================================
*
* JasperReports - Free Java report-generating library.
* Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.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.
*
* 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.
*
* JasperSoft Corporation
* 303 Second Street, Suite 450 North
* San Francisco, CA 94107
* http://www.jaspersoft.com
*/
package net.sf.jasperreports.engine.util;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.query.JRQueryExecuterFactory;
/**
* Query executer utility class.
*
* @author Lucian Chirita ([email protected])
* @version $Id: JRQueryExecuterUtils.java 1828 2007-08-24 13:58:43Z teodord $
*/
public class JRQueryExecuterUtils
{
private static final JRSingletonCache cache = new JRSingletonCache(JRQueryExecuterFactory.class);
/**
* Returns a query executer factory for a query language.
*
* @param language the query language
* @return a query executer factory
* @throws JRException
* @see JRProperties#QUERY_EXECUTER_FACTORY_PREFIX
*/
public static JRQueryExecuterFactory getQueryExecuterFactory(String language) throws JRException
{
String factoryClassName = JRProperties.getProperty(JRQueryExecuterFactory.QUERY_EXECUTER_FACTORY_PREFIX + language);
if (factoryClassName == null)
{
throw new JRException("No query executer factory class registered for " + language + " queries. " +
"Create a propery named " + JRQueryExecuterFactory.QUERY_EXECUTER_FACTORY_PREFIX + language + ".");
}
return (JRQueryExecuterFactory) cache.getCachedInstance(factoryClassName);
}
}