/*
* 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.metadata.parser;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class IncludeGlobalMetaDataReadHandler extends AbstractXmlReadHandler
{
private GlobalMetaDefinition result;
private GlobalMetaDefinition globalMetaDefinition;
public IncludeGlobalMetaDataReadHandler(final GlobalMetaDefinition globalMetaDefinition)
{
this.globalMetaDefinition = globalMetaDefinition;
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws SAXException if there is a parsing error.
*/
protected void startParsing(final Attributes attrs) throws SAXException
{
final String href = attrs.getValue(getUri(), "src");
if (href == null)
{
throw new ParseException("Required attribute 'src' is missing", getLocator());
}
final ResourceManager resourceManager = getRootHandler().getResourceManager();
final ResourceKey context = getRootHandler().getContext();
try
{
final ResourceKey resourceKey = resourceManager.deriveKey(context, href);
final Resource resource = resourceManager.create(resourceKey, null, GlobalMetaDefinition.class);
result = (GlobalMetaDefinition) resource.getResource();
}
catch (ResourceException e)
{
throw new ParseException("Failed to parse included global definitions", e, getLocator());
}
if (globalMetaDefinition != null)
{
globalMetaDefinition.merge(result);
}
}
public GlobalMetaDefinition getResult()
{
return result;
}
/**
* 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 result;
}
}