/*
* Copyright 2005-2010 the original author or authors.
*
* 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 org.springframework.ws.soap.stroap;
import java.util.NoSuchElementException;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.XMLEvent;
import org.springframework.util.Assert;
import org.springframework.xml.stream.AbstractXMLEventReader;
/**
* @author Arjen Poutsma
*/
class NonCachingStroapPayload extends StroapPayload {
private final XMLEventReader eventReader;
private int elementDepth = 0;
NonCachingStroapPayload(XMLEventReader eventReader) throws XMLStreamException {
Assert.notNull(eventReader, "'eventReader' must not be null");
this.eventReader = eventReader;
}
@Override
public QName getName() {
try {
XMLEvent event = eventReader.peek();
if (event != null && event.isStartElement()) {
return event.asStartElement().getName();
}
}
catch (XMLStreamException ex) {
// ignore
}
return null;
}
@Override
public XMLEventReader getEventReader() {
return new NonCachingXMLEventReader();
}
private class NonCachingXMLEventReader extends AbstractXMLEventReader {
public boolean hasNext() {
return elementDepth >= 0 && eventReader.hasNext();
}
public XMLEvent nextEvent() throws XMLStreamException {
if (elementDepth < 0) {
throw new NoSuchElementException();
}
XMLEvent event = eventReader.nextEvent();
if (event.isStartElement()) {
elementDepth++;
}
else if (event.isEndElement()) {
elementDepth--;
}
return event;
}
public XMLEvent peek() throws XMLStreamException {
if (elementDepth < 0) {
return null;
}
else {
return eventReader.peek();
}
}
}
}