/*
* 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.layout;
import java.beans.IntrospectionException;
import org.pentaho.reporting.engine.classic.core.ReportPreProcessor;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.common.LayoutPreprocessorPropertyReadHandler;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.compat.CompatibilityMapperUtil;
import org.pentaho.reporting.engine.classic.core.util.beans.BeanUtility;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* This is a bean-handler. The layout-preprocessor provides beanified getter and setter methods (like any function).
*
* @author Thomas Morgner
*/
public class LayoutPreprocessorReadHandler extends AbstractXmlReadHandler
{
private BeanUtility beanUtility;
private ReportPreProcessor preProcessor;
public LayoutPreprocessorReadHandler()
{
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws SAXException if there is a parsing error.
*/
protected void startParsing(final Attributes attrs) throws SAXException
{
final String preprocessorClass = attrs.getValue(getUri(), "class");
if (preprocessorClass == null)
{
throw new ParseException("Required attribute 'class' is missing");
}
preProcessor = (ReportPreProcessor) ObjectUtilities.loadAndInstantiate
(CompatibilityMapperUtil.mapClassName(preprocessorClass),
LayoutPreprocessorReadHandler.class, ReportPreProcessor.class);
if (preProcessor == null)
{
throw new ParseException("Failed to instantiate the specified preprocessor '" + preprocessorClass + '\'',
getLocator());
}
try
{
this.beanUtility = new BeanUtility(preProcessor);
}
catch (IntrospectionException e)
{
throw new ParseException("Failed to introspect the specified preprocessor '" + preprocessorClass + '\'',
getLocator());
}
}
/**
* 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) && "property".equals(tagName))
{
return new LayoutPreprocessorPropertyReadHandler(beanUtility);
}
return null;
}
public ReportPreProcessor getPreProcessor()
{
return preProcessor;
}
/**
* 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 preProcessor;
}
}