/*!
* 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) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.extensions.datasources.kettle.parser;
import org.pentaho.reporting.engine.classic.extensions.datasources.kettle.EmbeddedKettleTransformationProducer;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceKeyCreationException;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.StringReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class KettleEmbeddedTransReadHandler extends AbstractKettleTransformationProducerReadHandler
{
private String pluginId;
private StringReadHandler resourceReadHandler;
private String name;
public KettleEmbeddedTransReadHandler()
{
}
protected void startParsing(final Attributes attrs) throws SAXException
{
// note: We do not call super here
pluginId = attrs.getValue(getUri(), "plugin-id");
name = attrs.getValue(getUri(), "name");
}
public String getName()
{
return name;
}
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final Attributes atts) throws SAXException
{
if (getUri().equals(uri) && "resource".equals(tagName))
{
resourceReadHandler = new StringReadHandler();
return resourceReadHandler;
}
return super.getHandlerForChild(uri, tagName, atts);
}
public EmbeddedKettleTransformationProducer getObject() throws SAXException
{
if (resourceReadHandler == null)
{
throw new ParseException("Missing tag 'resource'", getLocator());
}
final String resourceName = resourceReadHandler.getResult();
try
{
byte[] bytes = loadDataFromBundle(resourceName);
EmbeddedKettleTransformationProducer kprod = new EmbeddedKettleTransformationProducer(getDefinedArgumentNames(),
getDefinedVariableNames(),
pluginId,
bytes);
kprod.setStopOnError(isStopOnError());
return kprod;
}
catch (final Exception e)
{
throw new ParseException("Could not load resource " + resourceName, e, getLocator());
}
}
private byte[] loadDataFromBundle(final String href) throws ResourceKeyCreationException, ResourceLoadingException
{
final ResourceKey key = getRootHandler().getSource();
final ResourceManager manager = getRootHandler().getResourceManager();
final ResourceKey derivedKey = manager.deriveKey(key, href);
final ResourceData data = manager.load(derivedKey);
return data.getResource(manager);
}
}