/*
* Copyright 2012 Research Studios Austria Forschungsges.m.b.H.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package won.protocol.message.processor.impl;
import org.apache.jena.query.Dataset;
import org.apache.jena.riot.Lang;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import won.protocol.message.WonMessage;
import won.protocol.message.WonMessageValidator;
import won.protocol.message.processor.WonMessageProcessor;
import won.protocol.message.processor.exception.WonMessageNotWellFormedException;
import won.protocol.message.processor.exception.WonMessageProcessingException;
import won.protocol.util.RdfUtils;
/**
* Checks WonMessages for integrity. The following steps are performed:
* <pre>
* <ul>
* <li>No default graph may be present</li>
* <li>each named graph is either an EnvelopeGraph or referenced in an EnvelopeGraph</li>
* <li>The outermost EnvelopeGraph is a subgraph of the graph identified by the message URI</li>
* </ul>
* </pre>
*
*/
public class WellformednessCheckingWonMessageProcessor implements WonMessageProcessor
{
private final Logger logger = LoggerFactory.getLogger(getClass());
WonMessageValidator validator = new WonMessageValidator();
@Override
public WonMessage process(final WonMessage message) throws WonMessageProcessingException {
Dataset dataset = message.getCompleteDataset();
StringBuilder errorMessage = new StringBuilder("Message is not valid, failed at check ");
boolean valid = validator.validate(dataset, errorMessage);
if (!valid) {
logger.info(errorMessage.toString() + "\n Offending message:\n" + RdfUtils.writeDatasetToString(dataset, Lang
.TRIG));
throw new WonMessageNotWellFormedException(errorMessage.toString());
}
return message;
}
}