/*
* Copyright 2005-2014 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.axiom;
import java.io.ByteArrayOutputStream;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Result;
import org.apache.axiom.om.OMDataSource;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.ds.ByteArrayDataSource;
import org.apache.axiom.om.util.StAXUtils;
import org.apache.axiom.soap.SOAPBody;
import org.apache.axiom.soap.SOAPFactory;
import org.springframework.util.xml.StaxUtils;
/**
* Non-caching payload in Axiom.
*
* @author Jim Cummings
* @author Arjen Poutsma
* @since 1.5.2
*/
class NonCachingPayload extends AbstractPayload {
private static final int BUF_SIZE = 1024;
NonCachingPayload(SOAPBody axiomBody, SOAPFactory axiomFactory) {
super(axiomBody, axiomFactory);
}
@Override
public Result getResultInternal() {
return StaxUtils.createCustomStaxResult(new DelegatingStreamWriter());
}
@Override
protected XMLStreamReader getStreamReader(OMElement payloadElement) {
return payloadElement.getXMLStreamReaderWithoutCaching();
}
private class DelegatingStreamWriter implements XMLStreamWriter {
private final ByteArrayOutputStream baos = new ByteArrayOutputStream(BUF_SIZE);
private final XMLStreamWriter delegate;
private QName name;
private String encoding = "UTF-8";
private int elementDepth = 0;
private boolean payloadAdded = false;
private DelegatingStreamWriter() {
try {
this.delegate = StAXUtils.createXMLStreamWriter(baos);
}
catch (XMLStreamException ex) {
throw new AxiomSoapBodyException("Could not determine payload root element", ex);
}
}
@Override
public void writeStartDocument() throws XMLStreamException {
// ignored
}
@Override
public void writeStartDocument(String version) throws XMLStreamException {
// ignored
}
@Override
public void writeStartDocument(String encoding, String version) throws XMLStreamException {
this.encoding = encoding;
}
@Override
public void writeStartElement(String localName) throws XMLStreamException {
if (name == null) {
name = new QName(localName);
}
elementDepth++;
delegate.writeStartElement(localName);
}
@Override
public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
if (name == null) {
name = new QName(namespaceURI, localName);
}
elementDepth++;
delegate.writeStartElement(namespaceURI, localName);
}
@Override
public void writeStartElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
if (name == null) {
name = new QName(namespaceURI, localName, prefix);
}
elementDepth++;
delegate.writeStartElement(prefix, localName, namespaceURI);
}
@Override
public void writeEndElement() throws XMLStreamException {
elementDepth--;
delegate.writeEndElement();
addPayload();
}
private void addPayload() throws XMLStreamException {
if (elementDepth <= 0 && !payloadAdded) {
delegate.flush();
if (baos.size() > 0) {
byte[] buf = baos.toByteArray();
OMDataSource dataSource = new ByteArrayDataSource(buf, encoding);
OMNamespace namespace =
getAxiomFactory().createOMNamespace(name.getNamespaceURI(), name.getPrefix());
OMElement payloadElement =
getAxiomFactory().createOMElement(dataSource, name.getLocalPart(), namespace);
getAxiomBody().addChild(payloadElement);
payloadAdded = true;
}
}
}
@Override
public void writeEmptyElement(String localName) throws XMLStreamException {
if (name == null) {
name = new QName(localName);
}
delegate.writeEmptyElement(localName);
addPayload();
}
@Override
public void writeEmptyElement(String namespaceURI, String localName) throws XMLStreamException {
if (name == null) {
name = new QName(namespaceURI, localName);
}
delegate.writeEmptyElement(namespaceURI, localName);
addPayload();
}
@Override
public void writeEmptyElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
if (name == null) {
name = new QName(namespaceURI, localName, prefix);
}
delegate.writeEmptyElement(prefix, localName, namespaceURI);
addPayload();
}
@Override
public void writeEndDocument() throws XMLStreamException {
elementDepth = 0;
delegate.writeEndDocument();
addPayload();
}
// Delegation
@Override
public void close() throws XMLStreamException {
addPayload();
delegate.close();
}
@Override
public void flush() throws XMLStreamException {
delegate.flush();
}
@Override
public NamespaceContext getNamespaceContext() {
return delegate.getNamespaceContext();
}
@Override
public String getPrefix(String uri) throws XMLStreamException {
return delegate.getPrefix(uri);
}
@Override
public Object getProperty(String name) throws IllegalArgumentException {
return delegate.getProperty(name);
}
@Override
public void setDefaultNamespace(String uri) throws XMLStreamException {
delegate.setDefaultNamespace(uri);
}
@Override
public void setNamespaceContext(NamespaceContext context) throws XMLStreamException {
delegate.setNamespaceContext(context);
}
@Override
public void setPrefix(String prefix, String uri) throws XMLStreamException {
delegate.setPrefix(prefix, uri);
}
@Override
public void writeAttribute(String localName, String value) throws XMLStreamException {
delegate.writeAttribute(localName, value);
}
@Override
public void writeAttribute(String namespaceURI, String localName, String value) throws XMLStreamException {
delegate.writeAttribute(namespaceURI, localName, value);
}
@Override
public void writeAttribute(String prefix, String namespaceURI, String localName, String value)
throws XMLStreamException {
delegate.writeAttribute(prefix, namespaceURI, localName, value);
}
@Override
public void writeCData(String data) throws XMLStreamException {
delegate.writeCData(data);
}
@Override
public void writeCharacters(char[] text, int start, int len) throws XMLStreamException {
delegate.writeCharacters(text, start, len);
}
@Override
public void writeCharacters(String text) throws XMLStreamException {
delegate.writeCharacters(text);
}
@Override
public void writeComment(String data) throws XMLStreamException {
delegate.writeComment(data);
}
@Override
public void writeDefaultNamespace(String namespaceURI) throws XMLStreamException {
delegate.writeDefaultNamespace(namespaceURI);
}
@Override
public void writeDTD(String dtd) throws XMLStreamException {
delegate.writeDTD(dtd);
}
@Override
public void writeEntityRef(String name) throws XMLStreamException {
delegate.writeEntityRef(name);
}
@Override
public void writeNamespace(String prefix, String namespaceURI) throws XMLStreamException {
delegate.writeNamespace(prefix, namespaceURI);
}
@Override
public void writeProcessingInstruction(String target) throws XMLStreamException {
delegate.writeProcessingInstruction(target);
}
@Override
public void writeProcessingInstruction(String target, String data) throws XMLStreamException {
delegate.writeProcessingInstruction(target, data);
}
}
}