aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.ws.util;
aoqi@0: 
aoqi@0: import com.sun.istack.internal.NotNull;
aoqi@0: import com.sun.istack.internal.Nullable;
aoqi@0: import com.sun.xml.internal.ws.util.xml.XmlUtil;
aoqi@0: import org.w3c.dom.*;
aoqi@0: 
aoqi@0: import javax.xml.XMLConstants;
aoqi@0: import javax.xml.namespace.NamespaceContext;
aoqi@0: import javax.xml.parsers.DocumentBuilder;
aoqi@0: import javax.xml.parsers.DocumentBuilderFactory;
aoqi@0: import javax.xml.parsers.FactoryConfigurationError;
aoqi@0: import javax.xml.parsers.ParserConfigurationException;
aoqi@0: import javax.xml.stream.XMLStreamException;
aoqi@0: import javax.xml.stream.XMLStreamWriter;
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.Iterator;
aoqi@0: import java.util.List;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @author JAXWS Development Team
aoqi@0:  */
aoqi@0: public class DOMUtil {
aoqi@0: 
aoqi@0:     private static DocumentBuilder db;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Creates a new DOM document.
aoqi@0:      */
aoqi@0:     public static Document createDom() {
aoqi@0:         synchronized (DOMUtil.class) {
aoqi@0:             if (db == null) {
aoqi@0:                 try {
aoqi@0:                     DocumentBuilderFactory dbf = XmlUtil.newDocumentBuilderFactory();
aoqi@0:                     dbf.setNamespaceAware(true);
aoqi@0:                     db = dbf.newDocumentBuilder();
aoqi@0:                 } catch (ParserConfigurationException e) {
aoqi@0:                     throw new FactoryConfigurationError(e);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return db.newDocument();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Traverses a DOM node and writes out on a streaming writer.
aoqi@0:      *
aoqi@0:      * @param node
aoqi@0:      * @param writer
aoqi@0:      */
aoqi@0:     public static void serializeNode(Element node, XMLStreamWriter writer) throws XMLStreamException {
aoqi@0:         writeTagWithAttributes(node, writer);
aoqi@0: 
aoqi@0:         if (node.hasChildNodes()) {
aoqi@0:             NodeList children = node.getChildNodes();
aoqi@0:             for (int i = 0; i < children.getLength(); i++) {
aoqi@0:                 Node child = children.item(i);
aoqi@0:                 switch (child.getNodeType()) {
aoqi@0:                     case Node.PROCESSING_INSTRUCTION_NODE:
aoqi@0:                         writer.writeProcessingInstruction(child.getNodeValue());
aoqi@0:                         break;
aoqi@0:                     case Node.DOCUMENT_TYPE_NODE:
aoqi@0:                         break;
aoqi@0:                     case Node.CDATA_SECTION_NODE:
aoqi@0:                         writer.writeCData(child.getNodeValue());
aoqi@0:                         break;
aoqi@0:                     case Node.COMMENT_NODE:
aoqi@0:                         writer.writeComment(child.getNodeValue());
aoqi@0:                         break;
aoqi@0:                     case Node.TEXT_NODE:
aoqi@0:                         writer.writeCharacters(child.getNodeValue());
aoqi@0:                         break;
aoqi@0:                     case Node.ELEMENT_NODE:
aoqi@0:                         serializeNode((Element) child, writer);
aoqi@0:                         break;
aoqi@0:                     default: break;
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:         writer.writeEndElement();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void writeTagWithAttributes(Element node, XMLStreamWriter writer) throws XMLStreamException {
aoqi@0:         String nodePrefix = fixNull(node.getPrefix());
aoqi@0:         String nodeNS = fixNull(node.getNamespaceURI());
aoqi@0:         //fix to work with DOM level 1 nodes.
aoqi@0:         String nodeLocalName = node.getLocalName()== null?node.getNodeName():node.getLocalName();
aoqi@0: 
aoqi@0:         // See if nodePrefix:nodeNS is declared in writer's NamespaceContext before writing start element
aoqi@0:         // Writing start element puts nodeNS in NamespaceContext even though namespace declaration not written
aoqi@0:         boolean prefixDecl = isPrefixDeclared(writer, nodeNS, nodePrefix);
aoqi@0:         writer.writeStartElement(nodePrefix, nodeLocalName, nodeNS);
aoqi@0: 
aoqi@0:         if (node.hasAttributes()) {
aoqi@0:             NamedNodeMap attrs = node.getAttributes();
aoqi@0:             int numOfAttributes = attrs.getLength();
aoqi@0:             // write namespace declarations first.
aoqi@0:             // if we interleave this with attribue writing,
aoqi@0:             // Zephyr will try to fix it and we end up getting inconsistent namespace bindings.
aoqi@0:             for (int i = 0; i < numOfAttributes; i++) {
aoqi@0:                 Node attr = attrs.item(i);
aoqi@0:                 String nsUri = fixNull(attr.getNamespaceURI());
aoqi@0:                 if (nsUri.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
aoqi@0:                     // handle default ns declarations
aoqi@0:                     String local = attr.getLocalName().equals(XMLConstants.XMLNS_ATTRIBUTE) ? "" : attr.getLocalName();
aoqi@0:                     if (local.equals(nodePrefix) && attr.getNodeValue().equals(nodeNS)) {
aoqi@0:                         prefixDecl = true;
aoqi@0:                     }
aoqi@0:                     if (local.equals("")) {
aoqi@0:                         writer.writeDefaultNamespace(attr.getNodeValue());
aoqi@0:                     } else {
aoqi@0:                         // this is a namespace declaration, not an attribute
aoqi@0:                         writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
aoqi@0:                         writer.writeNamespace(attr.getLocalName(), attr.getNodeValue());
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:         // node's namespace is not declared as attribute, but declared on ancestor
aoqi@0:         if (!prefixDecl) {
aoqi@0:             writer.writeNamespace(nodePrefix, nodeNS);
aoqi@0:         }
aoqi@0: 
aoqi@0:         // Write all other attributes which are not namespace decl.
aoqi@0:         if (node.hasAttributes()) {
aoqi@0:             NamedNodeMap attrs = node.getAttributes();
aoqi@0:             int numOfAttributes = attrs.getLength();
aoqi@0: 
aoqi@0:             for (int i = 0; i < numOfAttributes; i++) {
aoqi@0:                 Node attr = attrs.item(i);
aoqi@0:                 String attrPrefix = fixNull(attr.getPrefix());
aoqi@0:                 String attrNS = fixNull(attr.getNamespaceURI());
aoqi@0:                 if (!attrNS.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)) {
aoqi@0:                     String localName = attr.getLocalName();
aoqi@0:                     if (localName == null) {
aoqi@0:                         // TODO: this is really a bug in the caller for not creating proper DOM tree.
aoqi@0:                         // will remove this workaround after plugfest
aoqi@0:                         localName = attr.getNodeName();
aoqi@0:                     }
aoqi@0:                     boolean attrPrefixDecl = isPrefixDeclared(writer, attrNS, attrPrefix);
aoqi@0:                     if (!attrPrefix.equals("") && !attrPrefixDecl) {
aoqi@0:                         // attr has namespace but namespace decl is there in ancestor node
aoqi@0:                         // So write the namespace decl before writing the attr
aoqi@0:                         writer.setPrefix(attr.getLocalName(), attr.getNodeValue());
aoqi@0:                         writer.writeNamespace(attrPrefix, attrNS);
aoqi@0:                     }
aoqi@0:                     writer.writeAttribute(attrPrefix, attrNS, localName, attr.getNodeValue());
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
aoqi@0:         boolean prefixDecl = false;
aoqi@0:         NamespaceContext nscontext = writer.getNamespaceContext();
aoqi@0:         Iterator prefixItr = nscontext.getPrefixes(nsUri);
aoqi@0:         while (prefixItr.hasNext()) {
aoqi@0:             if (prefix.equals(prefixItr.next())) {
aoqi@0:                 prefixDecl = true;
aoqi@0:                 break;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return prefixDecl;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the first child of the given name, or null.
aoqi@0:      */
aoqi@0:     public static Element getFirstChild(Element e, String nsUri, String local) {
aoqi@0:         for (Node n = e.getFirstChild(); n != null; n = n.getNextSibling()) {
aoqi@0:             if (n.getNodeType() == Node.ELEMENT_NODE) {
aoqi@0:                 Element c = (Element) n;
aoqi@0:                 if (c.getLocalName().equals(local) && c.getNamespaceURI().equals(nsUri)) {
aoqi@0:                     return c;
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static
aoqi@0:     @NotNull
aoqi@0:     String fixNull(@Nullable String s) {
aoqi@0:         if (s == null) {
aoqi@0:             return "";
aoqi@0:         } else {
aoqi@0:             return s;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the first element child.
aoqi@0:      */
aoqi@0:     public static
aoqi@0:     @Nullable
aoqi@0:     Element getFirstElementChild(Node parent) {
aoqi@0:         for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
aoqi@0:             if (n.getNodeType() == Node.ELEMENT_NODE) {
aoqi@0:                 return (Element) n;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static @NotNull
aoqi@0:     List<Element> getChildElements(Node parent){
aoqi@0:         List<Element> elements = new ArrayList<Element>();
aoqi@0:         for (Node n = parent.getFirstChild(); n != null; n = n.getNextSibling()) {
aoqi@0:             if (n.getNodeType() == Node.ELEMENT_NODE) {
aoqi@0:                 elements.add((Element)n);
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return elements;
aoqi@0:     }
aoqi@0: }