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/*
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* reserved comment block
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* DO NOT REMOVE OR ALTER!
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*/
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/*
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* Copyright 2001-2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: DOM2TO.java,v 1.5 2005/09/28 13:48:44 pvedula Exp $
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*/
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package com.sun.org.apache.xalan.internal.xsltc.trax;
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import java.io.IOException;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.Node;
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import org.w3c.dom.Document;
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import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.DTDHandler;
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import org.xml.sax.EntityResolver;
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import org.xml.sax.ErrorHandler;
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import org.xml.sax.InputSource;
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import org.xml.sax.ext.Locator2;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXNotRecognizedException;
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import org.xml.sax.SAXNotSupportedException;
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import org.xml.sax.XMLReader;
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import com.sun.org.apache.xml.internal.serializer.NamespaceMappings;
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/**
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* @author Santiago Pericas-Geertsen
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* @author Sunitha Reddy
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*/
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public class DOM2TO implements XMLReader, Locator2 {
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private final static String EMPTYSTRING = "";
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private static final String XMLNS_PREFIX = "xmlns";
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/**
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* A reference to the DOM to be traversed.
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*/
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private Node _dom;
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/**
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* A reference to the output handler receiving the events.
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*/
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private SerializationHandler _handler;
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private String xmlVersion = null;
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private String xmlEncoding = null;
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public DOM2TO(Node root, SerializationHandler handler) {
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_dom = root;
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_handler = handler;
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}
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public ContentHandler getContentHandler() {
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return null;
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}
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public void setContentHandler(ContentHandler handler) {
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// Empty
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}
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public void parse(InputSource unused) throws IOException, SAXException {
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parse(_dom);
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}
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public void parse() throws IOException, SAXException {
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if (_dom != null) {
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boolean isIncomplete =
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(_dom.getNodeType() != org.w3c.dom.Node.DOCUMENT_NODE);
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if (isIncomplete) {
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_handler.startDocument();
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parse(_dom);
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_handler.endDocument();
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}
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else {
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parse(_dom);
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}
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}
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}
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/**
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* Traverse the DOM and generate TO events for a handler. Notice that
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* we need to handle implicit namespace declarations too.
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*/
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private void parse(Node node)
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throws IOException, SAXException
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{
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if (node == null) return;
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switch (node.getNodeType()) {
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case Node.ATTRIBUTE_NODE: // handled by ELEMENT_NODE
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case Node.DOCUMENT_TYPE_NODE :
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case Node.ENTITY_NODE :
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case Node.ENTITY_REFERENCE_NODE:
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case Node.NOTATION_NODE :
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// These node types are ignored!!!
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break;
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case Node.CDATA_SECTION_NODE:
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_handler.startCDATA();
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_handler.characters(node.getNodeValue());
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_handler.endCDATA();
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break;
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case Node.COMMENT_NODE: // should be handled!!!
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_handler.comment(node.getNodeValue());
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break;
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case Node.DOCUMENT_NODE:
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setDocumentInfo((Document)node);
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_handler.setDocumentLocator(this);
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_handler.startDocument();
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Node next = node.getFirstChild();
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while (next != null) {
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parse(next);
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next = next.getNextSibling();
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}
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_handler.endDocument();
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break;
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case Node.DOCUMENT_FRAGMENT_NODE:
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next = node.getFirstChild();
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while (next != null) {
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parse(next);
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next = next.getNextSibling();
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}
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break;
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case Node.ELEMENT_NODE:
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// Generate SAX event to start element
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final String qname = node.getNodeName();
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_handler.startElement(null, null, qname);
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int colon;
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String prefix;
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final NamedNodeMap map = node.getAttributes();
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final int length = map.getLength();
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// Process all namespace attributes first
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for (int i = 0; i < length; i++) {
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final Node attr = map.item(i);
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final String qnameAttr = attr.getNodeName();
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// Is this a namespace declaration?
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if (qnameAttr.startsWith(XMLNS_PREFIX)) {
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final String uriAttr = attr.getNodeValue();
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colon = qnameAttr.lastIndexOf(':');
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prefix = (colon > 0) ? qnameAttr.substring(colon + 1)
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: EMPTYSTRING;
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_handler.namespaceAfterStartElement(prefix, uriAttr);
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}
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}
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// Process all non-namespace attributes next
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NamespaceMappings nm = new NamespaceMappings();
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for (int i = 0; i < length; i++) {
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final Node attr = map.item(i);
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final String qnameAttr = attr.getNodeName();
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// Is this a regular attribute?
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if (!qnameAttr.startsWith(XMLNS_PREFIX)) {
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final String uriAttr = attr.getNamespaceURI();
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// Uri may be implicitly declared
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if (uriAttr != null && !uriAttr.equals(EMPTYSTRING) ) {
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colon = qnameAttr.lastIndexOf(':');
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// Fix for bug 26319
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// For attributes not given an prefix explictly
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// but having a namespace uri we need
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// to explicitly generate the prefix
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String newPrefix = nm.lookupPrefix(uriAttr);
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if (newPrefix == null)
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newPrefix = nm.generateNextPrefix();
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prefix = (colon > 0) ? qnameAttr.substring(0, colon)
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: newPrefix;
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_handler.namespaceAfterStartElement(prefix, uriAttr);
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_handler.addAttribute((prefix + ":" + qnameAttr),
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attr.getNodeValue());
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} else {
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_handler.addAttribute(qnameAttr, attr.getNodeValue());
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}
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}
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}
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// Now element namespace and children
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final String uri = node.getNamespaceURI();
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final String localName = node.getLocalName();
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// Uri may be implicitly declared
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if (uri != null) {
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colon = qname.lastIndexOf(':');
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prefix = (colon > 0) ? qname.substring(0, colon) : EMPTYSTRING;
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_handler.namespaceAfterStartElement(prefix, uri);
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}else {
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// Fix for bug 26319
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// If an element foo is created using
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// createElementNS(null,locName)
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// then the element should be serialized
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// <foo xmlns=" "/>
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if (uri == null && localName != null) {
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prefix = EMPTYSTRING;
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_handler.namespaceAfterStartElement(prefix, EMPTYSTRING);
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}
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}
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// Traverse all child nodes of the element (if any)
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next = node.getFirstChild();
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while (next != null) {
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parse(next);
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next = next.getNextSibling();
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}
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// Generate SAX event to close element
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_handler.endElement(qname);
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break;
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case Node.PROCESSING_INSTRUCTION_NODE:
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_handler.processingInstruction(node.getNodeName(),
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node.getNodeValue());
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break;
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case Node.TEXT_NODE:
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_handler.characters(node.getNodeValue());
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break;
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}
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public DTDHandler getDTDHandler() {
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return null;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public ErrorHandler getErrorHandler() {
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return null;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public boolean getFeature(String name) throws SAXNotRecognizedException,
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SAXNotSupportedException
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{
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return false;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void setFeature(String name, boolean value) throws
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SAXNotRecognizedException, SAXNotSupportedException
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{
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void parse(String sysId) throws IOException, SAXException {
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throw new IOException("This method is not yet implemented.");
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void setDTDHandler(DTDHandler handler) throws NullPointerException {
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void setEntityResolver(EntityResolver resolver) throws
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NullPointerException
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{
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public EntityResolver getEntityResolver() {
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return null;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void setErrorHandler(ErrorHandler handler) throws
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NullPointerException
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{
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public void setProperty(String name, Object value) throws
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SAXNotRecognizedException, SAXNotSupportedException {
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public Object getProperty(String name) throws SAXNotRecognizedException,
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SAXNotSupportedException
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{
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return null;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public int getColumnNumber() {
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return 0;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public int getLineNumber() {
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return 0;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public String getPublicId() {
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return null;
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}
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/**
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* This class is only used internally so this method should never
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* be called.
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*/
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public String getSystemId() {
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return null;
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}
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private void setDocumentInfo(Document document) {
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if (!document.getXmlStandalone())
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_handler.setStandalone(Boolean.toString(document.getXmlStandalone()));
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setXMLVersion(document.getXmlVersion());
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setEncoding(document.getXmlEncoding());
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}
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public String getXMLVersion() {
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return xmlVersion;
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}
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private void setXMLVersion(String version) {
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if (version != null) {
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xmlVersion = version;
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_handler.setVersion(xmlVersion);
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}
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}
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public String getEncoding() {
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return xmlEncoding;
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}
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private void setEncoding(String encoding) {
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if (encoding != null) {
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xmlEncoding = encoding;
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_handler.setEncoding(encoding);
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}
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}
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// Debugging
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private String getNodeTypeFromCode(short code) {
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String retval = null;
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switch (code) {
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case Node.ATTRIBUTE_NODE :
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retval = "ATTRIBUTE_NODE"; break;
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case Node.CDATA_SECTION_NODE :
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retval = "CDATA_SECTION_NODE"; break;
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case Node.COMMENT_NODE :
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retval = "COMMENT_NODE"; break;
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case Node.DOCUMENT_FRAGMENT_NODE :
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retval = "DOCUMENT_FRAGMENT_NODE"; break;
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case Node.DOCUMENT_NODE :
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retval = "DOCUMENT_NODE"; break;
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case Node.DOCUMENT_TYPE_NODE :
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retval = "DOCUMENT_TYPE_NODE"; break;
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case Node.ELEMENT_NODE :
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retval = "ELEMENT_NODE"; break;
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case Node.ENTITY_NODE :
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retval = "ENTITY_NODE"; break;
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case Node.ENTITY_REFERENCE_NODE :
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retval = "ENTITY_REFERENCE_NODE"; break;
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case Node.NOTATION_NODE :
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retval = "NOTATION_NODE"; break;
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case Node.PROCESSING_INSTRUCTION_NODE :
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retval = "PROCESSING_INSTRUCTION_NODE"; break;
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case Node.TEXT_NODE:
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retval = "TEXT_NODE"; break;
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}
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return retval;
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}
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}
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