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package com.sun.xml.ws.util;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
/**
* @author: JAXWS Development Team
*/
public class DOMUtil {
private static DocumentBuilder db;
/**
* Creates a new DOM document.
*/
public static Document createDom() {
synchronized (DOMUtil.class) {
if (db == null) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
db = dbf.newDocumentBuilder();
} catch (ParserConfigurationException e) {
throw new FactoryConfigurationError(e);
}
}
return db.newDocument();
}
}
public static Node createDOMNode(InputStream inputStream) {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
dbf.setValidating(false);
try {
DocumentBuilder builder = dbf.newDocumentBuilder();
try {
return builder.parse(inputStream);
} catch (SAXException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
} catch (ParserConfigurationException pce) {
IllegalArgumentException iae = new IllegalArgumentException(pce.getMessage());
iae.initCause(pce);
throw iae;
}
return null;
}
/**
* Traverses a DOM node and writes out on a streaming writer.
*
* @param node
* @param writer
*/
public static void serializeNode(Element node, XMLStreamWriter writer) throws XMLStreamException {
writeTagWithAttributes(node, writer);
if (node.hasChildNodes()) {
NodeList children = node.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
switch (child.getNodeType()) {
case Node.PROCESSING_INSTRUCTION_NODE:
writer.writeProcessingInstruction(child.getNodeValue());
case Node.DOCUMENT_TYPE_NODE:
break;
case Node.CDATA_SECTION_NODE:
writer.writeCData(child.getNodeValue());
break;
case Node.COMMENT_NODE:
writer.writeComment(child.getNodeValue());
break;
case Node.TEXT_NODE:
writer.writeCharacters(child.getNodeValue());
break;
case Node.ELEMENT_NODE:
serializeNode((Element) child, writer);
break;
}
}
}
writer.writeEndElement();
}
public static void writeTagWithAttributes(Element node, XMLStreamWriter writer) throws XMLStreamException {
String nodePrefix = fixNull(node.getPrefix());
String nodeNS = fixNull(node.getNamespaceURI());
//fix to work with DOM level 1 nodes.
String nodeLocalName = node.getLocalName()== null?node.getNodeName():node.getLocalName();
// See if nodePrefix:nodeNS is declared in writer's NamespaceContext before writing start element
// Writing start element puts nodeNS in NamespaceContext even though namespace declaration not written
boolean prefixDecl = isPrefixDeclared(writer, nodeNS, nodePrefix);
writer.writeStartElement(nodePrefix, nodeLocalName, nodeNS);
if (node.hasAttributes()) {
NamedNodeMap attrs = node.getAttributes();
int numOfAttributes = attrs.getLength();
// write namespace declarations first.
// if we interleave this with attribue writing,
// Zephyr will try to fix it and we end up getting inconsistent namespace bindings.
for (int i = 0; i < numOfAttributes; i++) {
Node attr = attrs.item(i);
String nsUri = fixNull(attr.getNamespaceURI());
if (nsUri.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
// handle default ns declarations
String local = attr.getLocalName().equals(XMLConstants.XMLNS_ATTRIBUTE) ? "" : attr.getLocalName();
if (local.equals(nodePrefix) && attr.getNodeValue().equals(nodeNS)) {
prefixDecl = true;
}
if (local.equals("")) {
writer.writeDefaultNamespace(attr.getNodeValue());
} else {
// this is a namespace declaration, not an attribute
writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
writer.writeNamespace(attr.getLocalName(), attr.getNodeValue());
}
}
}
}
// node's namespace is not declared as attribute, but declared on ancestor
if (!prefixDecl) {
writer.writeNamespace(nodePrefix, nodeNS);
}
// Write all other attributes which are not namespace decl.
if (node.hasAttributes()) {
NamedNodeMap attrs = node.getAttributes();
int numOfAttributes = attrs.getLength();
for (int i = 0; i < numOfAttributes; i++) {
Node attr = attrs.item(i);
String attrPrefix = fixNull(attr.getPrefix());
String attrNS = fixNull(attr.getNamespaceURI());
if (!attrNS.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
String localName = attr.getLocalName();
if (localName == null) {
// TODO: this is really a bug in the caller for not creating proper DOM tree.
// will remove this workaround after plugfest
localName = attr.getNodeName();
}
boolean attrPrefixDecl = isPrefixDeclared(writer, attrNS, attrPrefix);
if (!attrPrefix.equals("") && !attrPrefixDecl) {
// attr has namespace but namespace decl is there in ancestor node
// So write the namespace decl before writing the attr
writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
writer.writeNamespace(attrPrefix, attrNS);
}
writer.writeAttribute(attrPrefix, attrNS, localName, attr.getNodeValue());
}
}
}
}
private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
boolean prefixDecl = false;
NamespaceContext nscontext = writer.getNamespaceContext();
Iterator prefixItr = nscontext.getPrefixes(nsUri);
while (prefixItr.hasNext()) {
if (prefix.equals(prefixItr.next())) {
prefixDecl = true;
break;
}
}
return prefixDecl;
}
/**
* Gets the first child of the given name, or null.
*/
public static Element getFirstChild(Element e, String nsUri, String local) {
for (Node n = e.getFirstChild(); n != null; n = n.getNextSibling()) {
if (n.getNodeType() == Node.ELEMENT_NODE) {
Element c = (Element) n;
if (c.getLocalName().equals(local) && c.getNamespaceURI().equals(nsUri))
return c;
}
}
return null;
}
private static
@NotNull
String fixNull(@Nullable String s) {
if (s == null) return "";
else return s;
}
/**
* Gets the first element child.
*/
public static
@Nullable
Element getFirstElementChild(Node parent) {
for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
if (n.getNodeType() == Node.ELEMENT_NODE) {
return (Element) n;
}
}
return null;
}
public static @NotNull
List<Element> getChildElements(Node parent){
List<Element> elements = new ArrayList<Element>();
for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
if (n.getNodeType() == Node.ELEMENT_NODE) {
elements.add((Element)n);
}
}
return elements;
}
}