240 lines
9.4 KiB
Java
240 lines
9.4 KiB
Java
/*
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.xml.internal.ws.util;
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import com.sun.istack.internal.NotNull;
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import com.sun.istack.internal.Nullable;
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import com.sun.xml.internal.ws.util.xml.XmlUtil;
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import org.w3c.dom.*;
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import javax.xml.XMLConstants;
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import javax.xml.namespace.NamespaceContext;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.FactoryConfigurationError;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.stream.XMLStreamException;
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import javax.xml.stream.XMLStreamWriter;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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/**
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* @author JAXWS Development Team
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*/
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public class DOMUtil {
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private static DocumentBuilder db;
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/**
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* Creates a new DOM document.
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*/
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public static Document createDom() {
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synchronized (DOMUtil.class) {
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if (db == null) {
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try {
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DocumentBuilderFactory dbf = XmlUtil.newDocumentBuilderFactory();
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db = dbf.newDocumentBuilder();
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} catch (ParserConfigurationException e) {
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throw new FactoryConfigurationError(e);
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}
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}
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return db.newDocument();
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}
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}
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/**
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* Traverses a DOM node and writes out on a streaming writer.
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*
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* @param node
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* @param writer
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*/
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public static void serializeNode(Element node, XMLStreamWriter writer) throws XMLStreamException {
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writeTagWithAttributes(node, writer);
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if (node.hasChildNodes()) {
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NodeList children = node.getChildNodes();
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for (int i = 0; i < children.getLength(); i++) {
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Node child = children.item(i);
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switch (child.getNodeType()) {
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case Node.PROCESSING_INSTRUCTION_NODE:
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writer.writeProcessingInstruction(child.getNodeValue());
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break;
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case Node.DOCUMENT_TYPE_NODE:
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break;
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case Node.CDATA_SECTION_NODE:
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writer.writeCData(child.getNodeValue());
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break;
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case Node.COMMENT_NODE:
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writer.writeComment(child.getNodeValue());
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break;
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case Node.TEXT_NODE:
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writer.writeCharacters(child.getNodeValue());
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break;
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case Node.ELEMENT_NODE:
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serializeNode((Element) child, writer);
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break;
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default: break;
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}
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}
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}
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writer.writeEndElement();
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}
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public static void writeTagWithAttributes(Element node, XMLStreamWriter writer) throws XMLStreamException {
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String nodePrefix = fixNull(node.getPrefix());
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String nodeNS = fixNull(node.getNamespaceURI());
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//fix to work with DOM level 1 nodes.
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String nodeLocalName = node.getLocalName()== null?node.getNodeName():node.getLocalName();
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// See if nodePrefix:nodeNS is declared in writer's NamespaceContext before writing start element
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// Writing start element puts nodeNS in NamespaceContext even though namespace declaration not written
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boolean prefixDecl = isPrefixDeclared(writer, nodeNS, nodePrefix);
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writer.writeStartElement(nodePrefix, nodeLocalName, nodeNS);
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if (node.hasAttributes()) {
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NamedNodeMap attrs = node.getAttributes();
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int numOfAttributes = attrs.getLength();
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// write namespace declarations first.
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// if we interleave this with attribue writing,
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// Zephyr will try to fix it and we end up getting inconsistent namespace bindings.
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for (int i = 0; i < numOfAttributes; i++) {
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Node attr = attrs.item(i);
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String nsUri = fixNull(attr.getNamespaceURI());
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if (nsUri.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
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// handle default ns declarations
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String local = attr.getLocalName().equals(XMLConstants.XMLNS_ATTRIBUTE) ? "" : attr.getLocalName();
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if (local.equals(nodePrefix) && attr.getNodeValue().equals(nodeNS)) {
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prefixDecl = true;
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}
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if (local.equals("")) {
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writer.writeDefaultNamespace(attr.getNodeValue());
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} else {
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// this is a namespace declaration, not an attribute
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writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
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writer.writeNamespace(attr.getLocalName(), attr.getNodeValue());
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}
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}
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}
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}
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// node's namespace is not declared as attribute, but declared on ancestor
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if (!prefixDecl) {
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writer.writeNamespace(nodePrefix, nodeNS);
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}
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// Write all other attributes which are not namespace decl.
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if (node.hasAttributes()) {
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NamedNodeMap attrs = node.getAttributes();
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int numOfAttributes = attrs.getLength();
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for (int i = 0; i < numOfAttributes; i++) {
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Node attr = attrs.item(i);
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String attrPrefix = fixNull(attr.getPrefix());
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String attrNS = fixNull(attr.getNamespaceURI());
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if (!attrNS.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
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String localName = attr.getLocalName();
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if (localName == null) {
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// TODO: this is really a bug in the caller for not creating proper DOM tree.
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// will remove this workaround after plugfest
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localName = attr.getNodeName();
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}
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boolean attrPrefixDecl = isPrefixDeclared(writer, attrNS, attrPrefix);
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if (!attrPrefix.equals("") && !attrPrefixDecl) {
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// attr has namespace but namespace decl is there in ancestor node
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// So write the namespace decl before writing the attr
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writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
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writer.writeNamespace(attrPrefix, attrNS);
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}
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writer.writeAttribute(attrPrefix, attrNS, localName, attr.getNodeValue());
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}
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}
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}
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}
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private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
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boolean prefixDecl = false;
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NamespaceContext nscontext = writer.getNamespaceContext();
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Iterator prefixItr = nscontext.getPrefixes(nsUri);
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while (prefixItr.hasNext()) {
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if (prefix.equals(prefixItr.next())) {
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prefixDecl = true;
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break;
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}
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}
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return prefixDecl;
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}
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/**
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* Gets the first child of the given name, or null.
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*/
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public static Element getFirstChild(Element e, String nsUri, String local) {
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for (Node n = e.getFirstChild(); n != null; n = n.getNextSibling()) {
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if (n.getNodeType() == Node.ELEMENT_NODE) {
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Element c = (Element) n;
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if (c.getLocalName().equals(local) && c.getNamespaceURI().equals(nsUri)) {
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return c;
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}
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}
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}
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return null;
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}
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private static
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@NotNull
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String fixNull(@Nullable String s) {
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if (s == null) {
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return "";
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} else {
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return s;
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}
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}
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/**
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* Gets the first element child.
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*/
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public static
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@Nullable
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Element getFirstElementChild(Node parent) {
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for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
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if (n.getNodeType() == Node.ELEMENT_NODE) {
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return (Element) n;
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}
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}
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return null;
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}
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public static @NotNull
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List<Element> getChildElements(Node parent){
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List<Element> elements = new ArrayList<Element>();
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for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
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if (n.getNodeType() == Node.ELEMENT_NODE) {
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elements.add((Element)n);
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}
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}
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return elements;
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}
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}
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