/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.parser.bundle.data;
import java.util.ArrayList;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.common.ExpressionReadHandler;
import org.pentaho.reporting.engine.classic.core.parameters.ReportParameterDefinition;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class DataDefinitionRootElementHandler extends AbstractXmlReadHandler
{
private MasterParameterDefinitionReadHandler parameterDefinitionHandler;
private DataDefinition dataDefinition;
private DataSourceElementHandler dataSourceElementHandler;
private ArrayList expressionHandlers;
public DataDefinitionRootElementHandler()
{
expressionHandlers = new ArrayList();
}
/**
* Returns the handler for a child element.
*
* @param uri the URI of the namespace of the current element.
* @param tagName the tag name.
* @param atts the attributes.
* @return the handler or null, if the tagname is invalid.
* @throws SAXException if there is a parsing error.
*/
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final Attributes atts) throws SAXException
{
if (isSameNamespace(uri) == false)
{
return null;
}
if ("parameter-definition".equals(tagName))
{
parameterDefinitionHandler = new MasterParameterDefinitionReadHandler();
return parameterDefinitionHandler;
}
if ("expression".equals(tagName))
{
final ExpressionReadHandler readHandler = new ExpressionReadHandler();
expressionHandlers.add(readHandler);
return readHandler;
}
if ("data-source".equals(tagName))
{
dataSourceElementHandler = new DataSourceElementHandler();
return dataSourceElementHandler;
}
return null;
}
/**
* Done parsing.
*
* @throws SAXException if there is a parsing error.
*/
protected void doneParsing() throws SAXException
{
final String primaryQuery;
final int primaryQueryLimit;
final int primaryQueryTimeout;
final DataFactory primaryDataFactory;
if (dataSourceElementHandler == null)
{
primaryDataFactory = null;
primaryQuery = null;
primaryQueryLimit = 0;
primaryQueryTimeout = 0;
}
else
{
primaryDataFactory = dataSourceElementHandler.getDataFactory();
primaryQuery = dataSourceElementHandler.getQuery();
primaryQueryLimit = dataSourceElementHandler.getQueryLimit();
primaryQueryTimeout = dataSourceElementHandler.getQueryTimeout();
}
final ReportParameterDefinition reportParameterDefinition;
if (parameterDefinitionHandler != null)
{
reportParameterDefinition = (ReportParameterDefinition) parameterDefinitionHandler.getObject();
}
else
{
reportParameterDefinition = null;
}
final Expression[] expressions = new Expression[expressionHandlers.size()];
for (int i = 0; i < expressionHandlers.size(); i++)
{
final ExpressionReadHandler readHandler = (ExpressionReadHandler) expressionHandlers.get(i);
expressions[i] = (Expression) readHandler.getObject();
}
dataDefinition = new DataDefinition
(reportParameterDefinition, primaryDataFactory, primaryQuery, primaryQueryLimit,
primaryQueryTimeout, expressions);
}
/**
* Returns the object for this element or null, if this element does not create an object.
*
* @return the object.
* @throws SAXException if an parser error occured.
*/
public Object getObject() throws SAXException
{
return dataDefinition;
}
}