/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.camel.component.stax;
import javax.xml.stream.XMLStreamReader;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.util.ExchangeHelper;
/**
* It uses SAX content handler to handle events.
* <p/>
* The {@link Exchange} is expected to contain a message body, that is
* convertable to both a {@link InputSource} and a {@link XMLStreamReader}
* to support StAX streaming.
*/
public class StAXProcessor implements Processor {
private final Class<ContentHandler> contentHandlerClass;
private final ContentHandler contentHandler;
public StAXProcessor(Class<ContentHandler> contentHandlerClass) {
this.contentHandlerClass = contentHandlerClass;
this.contentHandler = null;
}
public StAXProcessor(ContentHandler contentHandler) {
this.contentHandler = contentHandler;
this.contentHandlerClass = null;
}
@Override
public void process(Exchange exchange) throws Exception {
InputSource is = exchange.getIn().getMandatoryBody(InputSource.class);
XMLStreamReader stream = exchange.getIn().getMandatoryBody(XMLStreamReader.class);
XMLReader reader = new StaxStreamXMLReader(stream);
ContentHandler handler;
if (contentHandlerClass != null) {
handler = contentHandlerClass.newInstance();
} else {
handler = contentHandler;
}
reader.setContentHandler(handler);
reader.parse(is);
if (ExchangeHelper.isOutCapable(exchange)) {
// preserve headers
exchange.getOut().setHeaders(exchange.getIn().getHeaders());
exchange.getOut().setBody(handler);
} else {
exchange.getIn().setBody(handler);
}
}
}