JRXPathQueryExecuterFactory.java

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports 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 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.engine.query;

import java.util.Map;

import net.sf.jasperreports.engine.JRDataset;
import net.sf.jasperreports.engine.JRException;

/**
 * XPath query executer factory.
 * <p/>
 * The factory creates {@link net.sf.jasperreports.engine.query.JRXPathQueryExecuter JRXPathQueryExecuter}
 * query executers.
 * 
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 * @version $Id: JRXPathQueryExecuterFactory.java 3778 2010-05-03 16:17:18Z lucianc $
 */
public class JRXPathQueryExecuterFactory implements JRQueryExecuterFactory
{
	/**
	 * Built-in parameter holding the value of the org.w3c.dom.Document used to run the XPath query.
	 */
	public final static String PARAMETER_XML_DATA_DOCUMENT = "XML_DATA_DOCUMENT";
	
	/**
	 * Parameter holding the format pattern used to instantiate java.util.Date instances.
	 */
	public final static String XML_DATE_PATTERN = "XML_DATE_PATTERN";
	
	/**
	 * Parameter holding the format pattern used to instantiate java.lang.Number instances.
	 */
	public final static String XML_NUMBER_PATTERN = "XML_NUMBER_PATTERN";

	/**
	 * Parameter holding the value of the datasource Locale
	 */
	public final static String XML_LOCALE = "XML_LOCALE";
	
	/**
	 * Parameter holding the value of the datasource Timezone
	 */
	public final static String XML_TIME_ZONE = "XML_TIME_ZONE";
	
	private final static Object[] XPATH_BUILTIN_PARAMETERS = {
		PARAMETER_XML_DATA_DOCUMENT,  "org.w3c.dom.Document",
		XML_DATE_PATTERN, "java.lang.String",
		XML_NUMBER_PATTERN, "java.lang.String",
		XML_LOCALE, "java.util.Locale",
		XML_TIME_ZONE, "java.util.TimeZone",
		};

	public Object[] getBuiltinParameters()
	{
		return XPATH_BUILTIN_PARAMETERS;
	}

	public JRQueryExecuter createQueryExecuter(JRDataset dataset, Map parameters)
			throws JRException
	{
		return new JRXPathQueryExecuter(dataset, parameters);
	}

	public boolean supportsQueryParameterType(String className)
	{
		return true;
	}
}