/**
* 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.cxf.staxutils;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.Iterator;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Logger;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.StreamFilter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLResolver;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.DTD;
import javax.xml.stream.events.Namespace;
import javax.xml.stream.events.StartDocument;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import org.w3c.dom.Attr;
import org.w3c.dom.CDATASection;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.EntityReference;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.helpers.XMLUtils;
public final class StaxUtils {
private static final Logger LOG = LogUtils.getL7dLogger(StaxUtils.class);
private static final BlockingQueue<XMLInputFactory> NS_AWARE_INPUT_FACTORY_POOL;
private static final BlockingQueue<XMLOutputFactory> OUTPUT_FACTORY_POOL;
private static final String XML_NS = "http://www.w3.org/2000/xmlns/";
static {
int i = 20;
try {
String s = System.getProperty("org.apache.cxf.staxutils.pool-size",
"-1");
i = Integer.parseInt(s);
} catch (Throwable t) {
//ignore
i = 20;
}
if (i <= 0) {
i = 20;
}
NS_AWARE_INPUT_FACTORY_POOL = new LinkedBlockingQueue<XMLInputFactory>(i);
OUTPUT_FACTORY_POOL = new LinkedBlockingQueue<XMLOutputFactory>(i);
}
private StaxUtils() {
}
/**
* Return a cached, namespace-aware, factory.
* @return
*/
public static XMLInputFactory getXMLInputFactory() {
XMLInputFactory f = NS_AWARE_INPUT_FACTORY_POOL.poll();
if (f == null) {
f = createXMLInputFactory(true);
}
return f;
}
public static void returnXMLInputFactory(XMLInputFactory factory) {
NS_AWARE_INPUT_FACTORY_POOL.offer(factory);
}
public static XMLOutputFactory getXMLOutputFactory() {
XMLOutputFactory f = OUTPUT_FACTORY_POOL.poll();
if (f == null) {
f = XMLOutputFactory.newInstance();
}
return f;
}
public static void returnXMLOutputFactory(XMLOutputFactory factory) {
OUTPUT_FACTORY_POOL.offer(factory);
}
/**
* Return a new factory so that the caller can set sticky parameters.
* @param nsAware
* @return
*/
public static XMLInputFactory createXMLInputFactory(boolean nsAware) {
XMLInputFactory factory = XMLInputFactory.newInstance();
factory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, nsAware);
factory.setProperty(XMLInputFactory.SUPPORT_DTD, Boolean.FALSE);
factory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.FALSE);
factory.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, Boolean.FALSE);
factory.setXMLResolver(new XMLResolver() {
public Object resolveEntity(String publicID, String systemID,
String baseURI, String namespace)
throws XMLStreamException {
throw new XMLStreamException("Reading external entities is disabled");
}
});
return factory;
}
public static XMLStreamWriter createXMLStreamWriter(Writer out) {
XMLOutputFactory factory = getXMLOutputFactory();
try {
return factory.createXMLStreamWriter(out);
} catch (XMLStreamException e) {
throw new RuntimeException("Cant' create XMLStreamWriter", e);
} finally {
returnXMLOutputFactory(factory);
}
}
public static XMLStreamWriter createXMLStreamWriter(OutputStream out) {
return createXMLStreamWriter(out, null);
}
public static XMLStreamWriter createXMLStreamWriter(OutputStream out, String encoding) {
if (encoding == null) {
encoding = "UTF-8";
}
XMLOutputFactory factory = getXMLOutputFactory();
try {
return factory.createXMLStreamWriter(out, encoding);
} catch (XMLStreamException e) {
throw new RuntimeException("Cant' create XMLStreamWriter", e);
} finally {
returnXMLOutputFactory(factory);
}
}
public static XMLStreamWriter createXMLStreamWriter(Result r) {
XMLOutputFactory factory = getXMLOutputFactory();
try {
return factory.createXMLStreamWriter(r);
} catch (XMLStreamException e) {
throw new RuntimeException("Cant' create XMLStreamWriter", e);
} finally {
returnXMLOutputFactory(factory);
}
}
public static XMLStreamReader createFilteredReader(XMLStreamReader reader, StreamFilter filter) {
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createFilteredReader(reader, filter);
} catch (XMLStreamException e) {
throw new RuntimeException("Cant' create XMLStreamReader", e);
} finally {
returnXMLInputFactory(factory);
}
}
public static void nextEvent(XMLStreamReader dr) {
try {
dr.next();
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
}
public static boolean toNextText(DepthXMLStreamReader reader) {
if (reader.getEventType() == XMLStreamReader.CHARACTERS) {
return true;
}
try {
int depth = reader.getDepth();
int event = reader.getEventType();
while (reader.getDepth() >= depth && reader.hasNext()) {
if (event == XMLStreamReader.CHARACTERS && reader.getDepth() == depth + 1) {
return true;
}
event = reader.next();
}
return false;
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
}
public static boolean toNextTag(XMLStreamReader reader) {
try {
// advance to first tag.
int x = reader.getEventType();
while (x != XMLStreamReader.START_ELEMENT
&& x != XMLStreamReader.END_ELEMENT
&& reader.hasNext()) {
x = reader.next();
}
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
return true;
}
public static boolean toNextTag(DepthXMLStreamReader reader, QName endTag) {
try {
int depth = reader.getDepth();
int event = reader.getEventType();
while (reader.getDepth() >= depth && reader.hasNext()) {
if (event == XMLStreamReader.START_ELEMENT && reader.getName().equals(endTag)
&& reader.getDepth() == depth + 1) {
return true;
}
event = reader.next();
}
return false;
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
}
public static void writeStartElement(XMLStreamWriter writer, String prefix, String name, String namespace)
throws XMLStreamException {
if (prefix == null) {
prefix = "";
}
if (namespace.length() > 0) {
writer.writeStartElement(prefix, name, namespace);
if (prefix.length() > 0) {
writer.writeNamespace(prefix, namespace);
} else {
writer.writeDefaultNamespace(namespace);
}
} else {
writer.writeStartElement(name);
writer.writeDefaultNamespace("");
}
}
/**
* Returns true if currently at the start of an element, otherwise move
* forwards to the next element start and return true, otherwise false is
* returned if the end of the stream is reached.
*/
public static boolean skipToStartOfElement(XMLStreamReader in) throws XMLStreamException {
for (int code = in.getEventType(); code != XMLStreamReader.END_DOCUMENT; code = in.next()) {
if (code == XMLStreamReader.START_ELEMENT) {
return true;
}
}
return false;
}
public static boolean toNextElement(DepthXMLStreamReader dr) {
if (dr.getEventType() == XMLStreamReader.START_ELEMENT) {
return true;
}
if (dr.getEventType() == XMLStreamReader.END_ELEMENT) {
return false;
}
try {
int depth = dr.getDepth();
for (int event = dr.getEventType(); dr.getDepth() >= depth && dr.hasNext(); event = dr.next()) {
if (event == XMLStreamReader.START_ELEMENT && dr.getDepth() == depth + 1) {
return true;
} else if (event == XMLStreamReader.END_ELEMENT) {
depth--;
}
}
return false;
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
}
public static boolean skipToStartOfElement(DepthXMLStreamReader in) throws XMLStreamException {
for (int code = in.getEventType(); code != XMLStreamReader.END_DOCUMENT; code = in.next()) {
if (code == XMLStreamReader.START_ELEMENT) {
return true;
}
}
return false;
}
public static Document copy(Document doc)
throws XMLStreamException, ParserConfigurationException {
XMLStreamReader reader = createXMLStreamReader(doc);
W3CDOMStreamWriter writer = new W3CDOMStreamWriter();
copy(reader, writer);
Document d = writer.getDocument();
d.setDocumentURI(doc.getDocumentURI());
return d;
}
public static void copy(Document doc, XMLStreamWriter writer) throws XMLStreamException {
XMLStreamReader reader = createXMLStreamReader(doc);
copy(reader, writer);
}
public static void copy(Element node, XMLStreamWriter writer) throws XMLStreamException {
XMLStreamReader reader = createXMLStreamReader(node);
copy(reader, writer);
}
/**
* Copies the reader to the writer. The start and end document methods must
* be handled on the writer manually. TODO: if the namespace on the reader
* has been declared previously to where we are in the stream, this probably
* won't work.
*
* @param reader
* @param writer
* @throws XMLStreamException
*/
public static void copy(XMLStreamReader reader, XMLStreamWriter writer) throws XMLStreamException {
copy(reader, writer, false);
}
public static void copy(XMLStreamReader reader, XMLStreamWriter writer,
boolean fragment) throws XMLStreamException {
// number of elements read in
int read = 0;
int event = reader.getEventType();
while (reader.hasNext()) {
switch (event) {
case XMLStreamConstants.START_ELEMENT:
read++;
writeStartElement(reader, writer);
break;
case XMLStreamConstants.END_ELEMENT:
writer.writeEndElement();
read--;
if (read <= 0 && !fragment) {
return;
}
break;
case XMLStreamConstants.CHARACTERS:
writer.writeCharacters(reader.getText());
break;
case XMLStreamConstants.START_DOCUMENT:
case XMLStreamConstants.END_DOCUMENT:
case XMLStreamConstants.ATTRIBUTE:
case XMLStreamConstants.NAMESPACE:
break;
default:
break;
}
event = reader.next();
}
}
private static void writeStartElement(XMLStreamReader reader, XMLStreamWriter writer)
throws XMLStreamException {
String local = reader.getLocalName();
String uri = reader.getNamespaceURI();
String prefix = reader.getPrefix();
if (prefix == null) {
prefix = "";
}
// System.out.println("STAXUTILS:writeStartElement : node name : " + local + " namespace URI" + uri);
boolean writeElementNS = false;
if (uri != null) {
String boundPrefix = writer.getPrefix(uri);
if (boundPrefix == null || !prefix.equals(boundPrefix)) {
writeElementNS = true;
}
}
// Write out the element name
if (uri != null) {
if (prefix.length() == 0 && StringUtils.isEmpty(uri)) {
writer.writeStartElement(local);
writer.setDefaultNamespace(uri);
} else {
writer.writeStartElement(prefix, local, uri);
writer.setPrefix(prefix, uri);
}
} else {
writer.writeStartElement(local);
}
// Write out the namespaces
for (int i = 0; i < reader.getNamespaceCount(); i++) {
String nsURI = reader.getNamespaceURI(i);
String nsPrefix = reader.getNamespacePrefix(i);
if (nsPrefix == null) {
nsPrefix = "";
}
if (nsPrefix.length() == 0) {
writer.writeDefaultNamespace(nsURI);
} else {
writer.writeNamespace(nsPrefix, nsURI);
}
if (nsURI.equals(uri) && nsPrefix.equals(prefix)) {
writeElementNS = false;
}
}
// Check if the namespace still needs to be written.
// We need this check because namespace writing works
// different on Woodstox and the RI.
if (writeElementNS) {
if (prefix == null || prefix.length() == 0) {
writer.writeDefaultNamespace(uri);
} else {
writer.writeNamespace(prefix, uri);
}
}
// Write out attributes
for (int i = 0; i < reader.getAttributeCount(); i++) {
String ns = reader.getAttributeNamespace(i);
String nsPrefix = reader.getAttributePrefix(i);
if (ns == null || ns.length() == 0) {
writer.writeAttribute(reader.getAttributeLocalName(i), reader.getAttributeValue(i));
} else if (nsPrefix == null || nsPrefix.length() == 0) {
writer.writeAttribute(reader.getAttributeNamespace(i), reader.getAttributeLocalName(i),
reader.getAttributeValue(i));
} else {
writer.writeAttribute(reader.getAttributePrefix(i), reader.getAttributeNamespace(i), reader
.getAttributeLocalName(i), reader.getAttributeValue(i));
}
}
}
public static void writeDocument(Document d, XMLStreamWriter writer, boolean repairing)
throws XMLStreamException {
writeDocument(d, writer, true, repairing);
}
public static void writeDocument(Document d, XMLStreamWriter writer, boolean writeProlog,
boolean repairing) throws XMLStreamException {
if (writeProlog) {
writer.writeStartDocument();
}
Node node = d.getFirstChild();
while (node != null) {
if (writeProlog || node.getNodeType() == Node.ELEMENT_NODE) {
writeNode(node, writer, repairing);
}
node = node.getNextSibling();
}
if (writeProlog) {
writer.writeEndDocument();
}
}
/**
* Writes an Element to an XMLStreamWriter. The writer must already have
* started the document (via writeStartDocument()). Also, this probably
* won't work with just a fragment of a document. The Element should be the
* root element of the document.
*
* @param e
* @param writer
* @throws XMLStreamException
*/
public static void writeElement(Element e, XMLStreamWriter writer, boolean repairing)
throws XMLStreamException {
writeElement(e, writer, repairing, true);
}
/**
* Writes an Element to an XMLStreamWriter. The writer must already have
* started the document (via writeStartDocument()). Also, this probably
* won't work with just a fragment of a document. The Element should be the
* root element of the document.
*
* @param e
* @param writer
* @param endElement true if the element should be ended
* @throws XMLStreamException
*/
public static void writeElement(Element e,
XMLStreamWriter writer,
boolean repairing,
boolean endElement)
throws XMLStreamException {
String prefix = e.getPrefix();
String ns = e.getNamespaceURI();
String localName = e.getLocalName();
// System.out.println("local name : " + localName + " URI: " + ns + " Prefix :" + prefix);
if (prefix == null) {
prefix = "";
}
if (localName == null) {
localName = e.getNodeName();
if (localName == null) {
throw new IllegalStateException("Element's local name cannot be null!");
}
}
String decUri = writer.getNamespaceContext().getNamespaceURI(prefix);
boolean declareNamespace = decUri == null || !decUri.equals(ns);
if (ns == null || ns.length() == 0) {
writer.writeStartElement(localName);
if (StringUtils.isEmpty(decUri)) {
declareNamespace = false;
}
} else {
// System.out.println("Calling writeStartElement for local name : "
// + localName + " URI: " + ns + " Prefix :" + prefix);
writer.writeStartElement(prefix, localName, ns);
}
NamedNodeMap attrs = e.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
Node attr = attrs.item(i);
String name = attr.getLocalName();
String attrPrefix = attr.getPrefix();
if (attrPrefix == null) {
attrPrefix = "";
}
if (name == null) {
name = attr.getNodeName();
}
if ("xmlns".equals(attrPrefix)) {
// System.out.println("WriteNamespace is called for prefix : "
// + name + " namespace :" + attr.getNodeValue());
writer.writeNamespace(name, attr.getNodeValue());
if (name.equals(prefix) && attr.getNodeValue().equals(ns)) {
declareNamespace = false;
}
} else {
if ("xmlns".equals(name) && "".equals(attrPrefix)) {
writer.writeNamespace("", attr.getNodeValue());
if (attr.getNodeValue().equals(ns)) {
declareNamespace = false;
} else if (StringUtils.isEmpty(attr.getNodeValue())
&& StringUtils.isEmpty(ns)) {
declareNamespace = false;
}
} else {
String attns = attr.getNamespaceURI();
String value = attr.getNodeValue();
if (attns == null || attns.length() == 0) {
writer.writeAttribute(name, value);
} else if (attrPrefix == null || attrPrefix.length() == 0) {
writer.writeAttribute(attns, name, value);
} else {
writer.writeAttribute(attrPrefix, attns, name, value);
}
}
}
}
if (declareNamespace && repairing) {
if (ns == null) {
writer.writeNamespace(prefix, "");
} else {
writer.writeNamespace(prefix, ns);
}
}
Node nd = e.getFirstChild();
while (nd != null) {
writeNode(nd, writer, repairing);
nd = nd.getNextSibling();
}
if (endElement) {
writer.writeEndElement();
}
}
public static void writeNode(Node n, XMLStreamWriter writer, boolean repairing)
throws XMLStreamException {
switch (n.getNodeType()) {
case Node.ELEMENT_NODE:
writeElement((Element)n, writer, repairing);
break;
case Node.TEXT_NODE:
writer.writeCharacters(((Text)n).getNodeValue());
break;
case Node.COMMENT_NODE:
writer.writeComment(((Comment)n).getData());
break;
case Node.CDATA_SECTION_NODE:
writer.writeCData(((CDATASection)n).getData());
break;
case Node.ENTITY_REFERENCE_NODE:
writer.writeEntityRef(((EntityReference)n).getNodeValue());
break;
case Node.PROCESSING_INSTRUCTION_NODE:
ProcessingInstruction pi = (ProcessingInstruction)n;
writer.writeProcessingInstruction(pi.getTarget(), pi.getData());
break;
case Node.DOCUMENT_NODE:
writeDocument((Document)n, writer, repairing);
break;
default:
throw new IllegalStateException("Found type: " + n.getClass().getName());
}
}
public static Document read(XMLStreamReader reader) throws XMLStreamException {
Document doc = DOMUtils.createDocument();
readDocElements(doc, reader, true);
return doc;
}
public static Document read(DocumentBuilder builder, XMLStreamReader reader, boolean repairing)
throws XMLStreamException {
Document doc = builder.newDocument();
readDocElements(doc, reader, repairing);
return doc;
}
/**
* @param parent
* @return
*/
private static Document getDocument(Node parent) {
return (parent instanceof Document) ? (Document)parent : parent.getOwnerDocument();
}
/**
* @param parent
* @param reader
* @return
* @throws XMLStreamException
*/
private static Element startElement(Node parent, XMLStreamReader reader, boolean repairing)
throws XMLStreamException {
Document doc = getDocument(parent);
Element e = doc.createElementNS(reader.getNamespaceURI(), reader.getLocalName());
if (reader.getPrefix() != null) {
e.setPrefix(reader.getPrefix());
}
e = (Element)parent.appendChild(e);
for (int ns = 0; ns < reader.getNamespaceCount(); ns++) {
String uri = reader.getNamespaceURI(ns);
String prefix = reader.getNamespacePrefix(ns);
declare(e, uri, prefix);
}
for (int att = 0; att < reader.getAttributeCount(); att++) {
String name = reader.getAttributeLocalName(att);
String prefix = reader.getAttributePrefix(att);
if (prefix != null && prefix.length() > 0) {
name = prefix + ":" + name;
}
Attr attr = doc.createAttributeNS(reader.getAttributeNamespace(att), name);
attr.setValue(reader.getAttributeValue(att));
e.setAttributeNode(attr);
}
if (repairing && !isDeclared(e, reader.getNamespaceURI(), reader.getPrefix())) {
declare(e, reader.getNamespaceURI(), reader.getPrefix());
}
reader.next();
readDocElements(e, reader, repairing);
return e;
}
private static boolean isDeclared(Element e, String namespaceURI, String prefix) {
Attr att;
if (prefix != null && prefix.length() > 0) {
att = e.getAttributeNodeNS(XML_NS, prefix);
} else {
att = e.getAttributeNode("xmlns");
}
if (att != null && att.getNodeValue().equals(namespaceURI)) {
return true;
}
if (e.getParentNode() instanceof Element) {
return isDeclared((Element)e.getParentNode(), namespaceURI, prefix);
}
return false;
}
/**
* @param parent
* @param reader
* @throws XMLStreamException
*/
public static void readDocElements(Node parent, XMLStreamReader reader, boolean repairing)
throws XMLStreamException {
Document doc = getDocument(parent);
int event = reader.getEventType();
while (reader.hasNext()) {
switch (event) {
case XMLStreamConstants.START_ELEMENT:
startElement(parent, reader, repairing);
if (parent instanceof Document) {
return;
}
break;
case XMLStreamConstants.END_ELEMENT:
return;
case XMLStreamConstants.NAMESPACE:
break;
case XMLStreamConstants.ATTRIBUTE:
break;
case XMLStreamConstants.CHARACTERS:
if (parent != null) {
parent.appendChild(doc.createTextNode(reader.getText()));
}
break;
case XMLStreamConstants.COMMENT:
if (parent != null) {
parent.appendChild(doc.createComment(reader.getText()));
}
break;
case XMLStreamConstants.CDATA:
parent.appendChild(doc.createCDATASection(reader.getText()));
break;
case XMLStreamConstants.PROCESSING_INSTRUCTION:
parent.appendChild(doc.createProcessingInstruction(reader.getPITarget(), reader.getPIData()));
break;
case XMLStreamConstants.ENTITY_REFERENCE:
parent.appendChild(doc.createProcessingInstruction(reader.getPITarget(), reader.getPIData()));
break;
default:
break;
}
if (reader.hasNext()) {
event = reader.next();
}
}
}
private static void declare(Element node, String uri, String prefix) {
String qualname;
if (prefix != null && prefix.length() > 0) {
qualname = "xmlns:" + prefix;
} else {
qualname = "xmlns";
}
Attr attr = node.getOwnerDocument().createAttributeNS(XML_NS, qualname);
attr.setValue(uri);
node.setAttributeNodeNS(attr);
}
/**
* @param in
* @param encoding
* @param ctx
* @return
*/
public static XMLStreamReader createXMLStreamReader(InputStream in, String encoding) {
if (encoding == null) {
encoding = "UTF-8";
}
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createXMLStreamReader(in, encoding);
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
} finally {
returnXMLInputFactory(factory);
}
}
/**
* @param in
* @return
*/
public static XMLStreamReader createXMLStreamReader(InputStream in) {
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createXMLStreamReader(in);
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
} finally {
returnXMLInputFactory(factory);
}
}
public static XMLStreamReader createXMLStreamReader(String systemId, InputStream in) {
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createXMLStreamReader(systemId, in);
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
} finally {
returnXMLInputFactory(factory);
}
}
public static XMLStreamReader createXMLStreamReader(Element el) {
return new W3CDOMStreamReader(el);
}
public static XMLStreamReader createXMLStreamReader(Document doc) {
return new W3CDOMStreamReader(doc.getDocumentElement());
}
public static XMLStreamReader createXMLStreamReader(Source source) {
try {
if (source instanceof DOMSource) {
DOMSource ds = (DOMSource)source;
Node nd = ds.getNode();
Element el = null;
if (nd instanceof Document) {
el = ((Document)nd).getDocumentElement();
} else if (nd instanceof Element) {
el = (Element)nd;
}
if (null != el) {
return new W3CDOMStreamReader(el);
}
}
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createXMLStreamReader(source);
} finally {
returnXMLInputFactory(factory);
}
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
}
}
/**
* @param reader
* @return
*/
public static XMLStreamReader createXMLStreamReader(Reader reader) {
XMLInputFactory factory = getXMLInputFactory();
try {
return factory.createXMLStreamReader(reader);
} catch (XMLStreamException e) {
throw new RuntimeException("Couldn't parse stream.", e);
} finally {
returnXMLInputFactory(factory);
}
}
/**
* Reads a QName from the element text. Reader must be positioned at the
* start tag.
*/
public static QName readQName(XMLStreamReader reader) throws XMLStreamException {
String value = reader.getElementText();
if (value == null) {
return null;
}
int index = value.indexOf(":");
if (index == -1) {
return new QName(value);
}
String prefix = value.substring(0, index);
String localName = value.substring(index + 1);
String ns = reader.getNamespaceURI(prefix);
if ((prefix != null && ns == null) || localName == null) {
throw new RuntimeException("Invalid QName in mapping: " + value);
}
if (ns == null) {
return new QName(localName);
}
return new QName(ns, localName, prefix);
}
/**
* Create a unique namespace uri/prefix combination.
*
* @param nsUri
* @return The namespace with the specified URI. If one doesn't exist, one
* is created.
* @throws XMLStreamException
*/
public static String getUniquePrefix(XMLStreamWriter writer, String namespaceURI, boolean declare)
throws XMLStreamException {
String prefix = writer.getPrefix(namespaceURI);
if (prefix == null) {
prefix = getUniquePrefix(writer);
if (declare) {
writer.setPrefix(prefix, namespaceURI);
writer.writeNamespace(prefix, namespaceURI);
}
}
return prefix;
}
public static String getUniquePrefix(XMLStreamWriter writer) {
int n = 1;
NamespaceContext nc = writer.getNamespaceContext();
while (true) {
String nsPrefix = "ns" + n;
if (nc == null || nc.getNamespaceURI(nsPrefix) == null) {
return nsPrefix;
}
n++;
}
}
public static void printXmlFragment(XMLStreamReader reader) {
try {
LOG.info(XMLUtils.toString(StaxUtils.read(reader), 4));
} catch (XMLStreamException e) {
LOG.severe(e.getMessage());
}
}
private static void writeStartElementEvent(XMLEvent event, XMLStreamWriter writer)
throws XMLStreamException {
StartElement start = event.asStartElement();
QName name = start.getName();
String nsURI = name.getNamespaceURI();
String localName = name.getLocalPart();
String prefix = name.getPrefix();
if (prefix != null) {
writer.writeStartElement(prefix, localName, nsURI);
} else if (nsURI != null) {
writer.writeStartElement(localName, nsURI);
} else {
writer.writeStartElement(localName);
}
Iterator it = start.getNamespaces();
while (it != null && it.hasNext()) {
writeEvent((XMLEvent)it.next(), writer);
}
it = start.getAttributes();
while (it != null && it.hasNext()) {
writeAttributeEvent((Attribute)it.next(), writer);
}
}
private static void writeAttributeEvent(XMLEvent event, XMLStreamWriter writer)
throws XMLStreamException {
Attribute attr = (Attribute)event;
QName name = attr.getName();
String nsURI = name.getNamespaceURI();
String localName = name.getLocalPart();
String prefix = name.getPrefix();
String value = attr.getValue();
if (prefix != null) {
writer.writeAttribute(prefix, nsURI, localName, value);
} else if (nsURI != null) {
writer.writeAttribute(nsURI, localName, value);
} else {
writer.writeAttribute(localName, value);
}
}
public static void writeEvent(XMLEvent event, XMLStreamWriter writer)
throws XMLStreamException {
switch (event.getEventType()) {
case XMLEvent.START_ELEMENT:
writeStartElementEvent(event, writer);
break;
case XMLEvent.END_ELEMENT:
writer.writeEndElement();
break;
case XMLEvent.ATTRIBUTE:
writeAttributeEvent(event, writer);
break;
case XMLEvent.ENTITY_REFERENCE:
writer.writeEntityRef(((javax.xml.stream.events.EntityReference)event).getName());
break;
case XMLEvent.DTD:
writer.writeDTD(((DTD)event).getDocumentTypeDeclaration());
break;
case XMLEvent.PROCESSING_INSTRUCTION:
if (((javax.xml.stream.events.ProcessingInstruction)event).getData() != null) {
writer.writeProcessingInstruction(
((javax.xml.stream.events.ProcessingInstruction)event).getTarget(),
((javax.xml.stream.events.ProcessingInstruction)event).getData());
} else {
writer.writeProcessingInstruction(
((javax.xml.stream.events.ProcessingInstruction)event).getTarget());
}
break;
case XMLEvent.NAMESPACE:
if (((Namespace)event).isDefaultNamespaceDeclaration()) {
writer.writeDefaultNamespace(((Namespace)event).getNamespaceURI());
} else {
writer.writeNamespace(((Namespace)event).getPrefix(),
((Namespace)event).getNamespaceURI());
}
break;
case XMLEvent.COMMENT:
writer.writeComment(((javax.xml.stream.events.Comment)event).getText());
break;
case XMLEvent.CHARACTERS:
case XMLEvent.SPACE:
writer.writeCharacters(event.asCharacters().getData());
break;
case XMLEvent.CDATA:
writer.writeCData(event.asCharacters().getData());
break;
case XMLEvent.START_DOCUMENT:
if (((StartDocument)event).encodingSet()) {
writer.writeStartDocument(((StartDocument)event).getCharacterEncodingScheme(),
((StartDocument)event).getVersion());
} else {
writer.writeStartDocument(((StartDocument)event).getVersion());
}
break;
case XMLEvent.END_DOCUMENT:
writer.writeEndDocument();
break;
default:
//shouldn't get here
}
}
}