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Axis2 JAXWS Implementation
/*
* 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.axis2.jaxws.context.listener;
import java.io.InputStream;
import java.util.HashMap;
import java.util.LinkedList;
import javax.xml.soap.SOAPConstants;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import org.apache.axiom.om.OMContainer;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMException;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.OMSourcedElement;
import org.apache.axiom.om.ds.ParserInputStreamDataSource;
import org.apache.axiom.om.impl.builder.CustomBuilder;
import org.apache.axis2.datasource.jaxb.JAXBCustomBuilderMonitor;
import org.apache.axis2.jaxws.handler.HandlerUtils;
import org.apache.axiom.soap.SOAPFactory;
import org.apache.axiom.soap.SOAPHeader;
import org.apache.axis2.jaxws.message.databinding.ParsedEntityReader;
import org.apache.axis2.jaxws.message.factory.ParsedEntityReaderFactory;
import org.apache.axis2.jaxws.registry.FactoryRegistry;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* A custom builder to that does the following:
* 1) Uses the parser to fetch the inputStream if parser supports reading of element contents
* 2) Use the inputStream to create a DataSource backed by the InputStream read from Parser.
* 3) Use the OMFactory to create OMSourcedElement, OMSourcedElement is backed by ParsedEntityDataSource.
*/
public class ParserInputStreamCustomBuilder implements CustomBuilder {
private static final Log log =
LogFactory.getLog(ParserInputStreamCustomBuilder.class);
private String encoding = null;
/**
* Constructor
* @param encoding
*/
public ParserInputStreamCustomBuilder(String encoding) {
this.encoding = (encoding == null) ? "utf-8" :encoding;
}
/*
* (non-Javadoc)
* @see org.apache.axiom.om.impl.builder.CustomBuilder#create(java.lang.String, java.lang.String, org.apache.axiom.om.OMContainer, javax.xml.stream.XMLStreamReader, org.apache.axiom.om.OMFactory)
*/
public OMElement create(String namespace,
String localPart,
OMContainer parent,
XMLStreamReader reader,
OMFactory factory) throws OMException {
if (log.isDebugEnabled()) {
log.debug("create namespace = " + namespace);
log.debug(" localPart = " + localPart);
log.debug(" reader = " + reader.getClass());
}
if (!shouldUnmarshal(namespace, localPart)) {
if (log.isDebugEnabled()) {
log.debug("This element won't be unmarshalled with the custom builder");
}
return null;
}
/*
* 1) Use the the parser to fetch the inputStream
* 2) Use the inputStream to create a DataSource, delay reading of content as much as you can.
* 3) Use the OMFactory to create OMSourcedElement, OMSourcedElement is backed by ParsedEntityDataSource.
*/
try{
ParsedEntityReaderFactory perf = (ParsedEntityReaderFactory)FactoryRegistry.getFactory(ParsedEntityReaderFactory.class);
ParsedEntityReader entityReader = perf.getParsedEntityReader();
if (log.isDebugEnabled()) {
log.debug("ParsedEntityReader = " + entityReader);
}
//Do not user custom builder if Parser does not have ability to read sub content.
if(!entityReader.isParsedEntityStreamAvailable()){
if (log.isDebugEnabled()) {
log.debug("ParsedEntityStream is not available, defaulting to normal build");
}
return null;
}
// Create an OMSourcedElement backed by the ParsedData
InputStream parsedStream = getPayloadContent(reader, entityReader);
if(parsedStream == null){
//cant read content from EntityReader, returning null.
if (log.isDebugEnabled()) {
log.debug("Unable to read content from the entity reader, defaulting to normal build");
}
return null;
}
HashMap nsElementDecls = getElementNamespaceDeclarations(reader);
HashMap attrElementDecls = getElementAttributeDeclarations(reader);
//read the payload. Lets move the parser forward.
if(reader.hasNext()){
reader.next();
}
if(namespace == null){
//lets look for ns in reader
namespace = reader.getNamespaceURI();
if(namespace == null){
//still cant find the namespace, just set it to "";
namespace = "";
}
}
OMNamespace ns = factory.createOMNamespace(namespace, reader.getPrefix());
InputStream payload = ContextListenerUtils.createPayloadElement(parsedStream, ns, localPart, parent,
nsElementDecls, attrElementDecls);
ParserInputStreamDataSource ds = new ParserInputStreamDataSource(payload, encoding);
OMSourcedElement om = null;
if (parent instanceof SOAPHeader && factory instanceof SOAPFactory) {
om = ((SOAPFactory)factory).createSOAPHeaderBlock(localPart, ns, ds);
} else {
om = factory.createOMElement(ds, localPart, ns);
}
//Add the new OMSourcedElement ot the parent
parent.addChild(om);
/*
//Lets Mark the body as complete so Serialize calls dont fetch data from parser for body content.
if(parent instanceof SOAPBodyImpl){
((SOAPBodyImpl)parent).setComplete(true);
}
*/
return om;
} catch (OMException e) {
throw e;
} catch (Throwable t) {
throw new OMException(t);
}
}
public OMElement create(String namespace,
String localPart,
OMContainer parent,
XMLStreamReader reader,
OMFactory factory,
InputStream payload) throws OMException {
if (log.isDebugEnabled()) {
log.debug("create namespace = " + namespace);
log.debug(" localPart = " + localPart);
log.debug(" reader = " + reader.getClass());
}
/*
* 1) Use the the parser to fetch the inputStream
* 2) Use the inputStream to create a DataSource, delay reading of content as much as you can.
* 3) Use the OMFactory to create OMSourcedElement, OMSourcedElement is backed by ParsedEntityDataSource.
*/
try{
if(namespace == null){
//lets look for ns in reader
namespace = reader.getNamespaceURI();
if(namespace == null){
//still cant find the namespace, just set it to "";
namespace = "";
}
}
if (!shouldUnmarshal(namespace, localPart)) {
if (log.isDebugEnabled()) {
log.debug("This element won't be unmarshalled with the custom builder");
}
return null;
}
OMNamespace ns = factory.createOMNamespace(namespace, reader.getPrefix());
ParserInputStreamDataSource ds = new ParserInputStreamDataSource(payload, encoding);
OMSourcedElement om = null;
if (parent instanceof SOAPHeader && factory instanceof SOAPFactory) {
om = ((SOAPFactory)factory).createSOAPHeaderBlock(localPart, ns, ds);
} else {
om = factory.createOMElement(ds, localPart, ns);
}
//Add the new OMSourcedElement ot the parent
parent.addChild(om);
return om;
} catch (OMException e) {
throw e;
} catch (Throwable t) {
throw new OMException(t);
}
}
private HashMap getElementNamespaceDeclarations(XMLStreamReader reader)
{
HashMap nsElementDecls = new HashMap();
int count = reader.getNamespaceCount();
for (int i = 0; i < count; i++){
String prefix = reader.getNamespacePrefix(i);
String namespace = reader.getNamespaceURI(i);
if (namespace != null && namespace.length() > 0){
nsElementDecls.put(prefix == null ? "":prefix, namespace);
}
}
return nsElementDecls;
}
private HashMap getElementAttributeDeclarations(XMLStreamReader reader)
{
HashMap attrElementDecls = new HashMap();
int count = reader.getAttributeCount();
for (int i = 0; i < count; i++) {
String prefix = reader.getAttributePrefix(i);
String name = reader.getAttributeLocalName(i);
String value = convertEntityReferences(reader.getAttributeValue(i));
String compoundName;
if (prefix != null && prefix.length() > 0){
compoundName = prefix+":"+name;
}
else {
compoundName = name;
}
attrElementDecls.put(compoundName, value);
}
return attrElementDecls;
}
protected String convertEntityReferences(String value)
{
if ((value == null) || (value.length() == 0))
return value;
int valueLen = value.length();
int[] positionsToChange = null;
int numChanged = 0;
for (int i = 0; i < valueLen; i++) {
switch (value.charAt(i)) {
case '<':
case '>':
case '&':
case '\"':
case '\'':
if (positionsToChange == null)
{
positionsToChange = new int[valueLen];
}
positionsToChange[numChanged++]=i;
break;
}
}
if (numChanged == 0) {
if(log.isDebugEnabled())
{
log.debug("No entity references were found in "+value);
}
return value;
}
else {
if(log.isDebugEnabled())
{
log.debug("Found "+numChanged+" entity references in "+value);
}
//We'll create the new builder assuming the size of the worst case
StringBuilder changedValue = new StringBuilder(valueLen+numChanged*5);
int changedPos = 0;
for (int i = 0; i < valueLen; i++) {
if (i == positionsToChange[changedPos]) {
switch (value.charAt(i)) {
case '<':
changedValue.append("<");
changedPos++;
break;
case '>':
changedValue.append(">");
changedPos++;
break;
case '&':
changedValue.append("&");
changedPos++;
break;
case '\'':
changedValue.append("'");
changedPos++;
break;
case '\"':
changedValue.append(""");
changedPos++;
break;
}
}
else {
changedValue.append(value.charAt(i));
}
}
if(log.isDebugEnabled())
{
log.debug("Converted to "+changedValue.toString());
}
return changedValue.toString();
}
}
/*
* Read content from entityReader.
*/
private InputStream getPayloadContent(XMLStreamReader parser, ParsedEntityReader entityReader){
int event = parser.getEventType();
//Make sure its start element event.
if(log.isDebugEnabled()){
log.debug("checking if event is START_ELEMENT");
}
InputStream parsedStream = null;
if(event == XMLStreamConstants.START_ELEMENT){
if(log.isDebugEnabled()){
log.debug("event is START_ELEMENT");
}
parsedStream = entityReader.readParsedEntityStream(parser);
if(parsedStream!=null){
if(log.isDebugEnabled()){
log.debug("Read Parsed EntityStream");
}
}
}
return parsedStream;
}
/**
* @param namespace
* @param localPart
* @return true if this ns and local part is acceptable for unmarshalling
*/
private boolean shouldUnmarshal(String namespace, String localPart) {
/**
* The stream preserves the original message, so I think
* we want to do unmarshal even if high fidelity is specified.
boolean isHighFidelity = HandlerUtils.isHighFidelity(msgContext);
if (isHighFidelity) {
return false;
}
*/
// Don't unmarshal SOAPFaults.
// If there is no localPart, this also indicates a potential problem...so don't
// use the custom builder
if (localPart == null ||
(localPart.equals("Fault") &&
(SOAPConstants.URI_NS_SOAP_1_1_ENVELOPE.equals(namespace) ||
SOAPConstants.URI_NS_SOAP_1_2_ENVELOPE.equals(namespace)))) {
return false;
}
/**
* For JAXB custom building, we ignore security elements.
* I don't think it matters for parsed entities since they preserve all the content
if (localPart.equals("EncryptedData")) {
return false;
}
*/
return true;
}
}