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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: DOM2SAX.java,v 1.2.4.1 2005/09/06 11:52:46 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 java.util.Hashtable;
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import java.util.Stack;
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import java.util.Vector;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.Node;
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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.Locator;
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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 org.xml.sax.ext.LexicalHandler;
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import org.xml.sax.helpers.AttributesImpl;
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import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl;
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import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary;
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/**
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* @author G. Todd Miller
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*/
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public class DOM2SAX implements XMLReader, Locator {
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private final static String EMPTYSTRING = "";
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private static final String XMLNS_PREFIX = "xmlns";
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private Node _dom = null;
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private ContentHandler _sax = null;
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private LexicalHandler _lex = null;
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private SAXImpl _saxImpl = null;
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private Hashtable _nsPrefixes = new Hashtable();
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public DOM2SAX(Node root) {
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_dom = root;
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}
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public ContentHandler getContentHandler() {
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return _sax;
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}
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public void setContentHandler(ContentHandler handler) throws
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NullPointerException
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{
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_sax = handler;
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if (handler instanceof LexicalHandler) {
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_lex = (LexicalHandler) handler;
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}
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if (handler instanceof SAXImpl) {
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_saxImpl = (SAXImpl)handler;
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}
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}
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/**
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* Begin the scope of namespace prefix. Forward the event to the
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* SAX handler only if the prefix is unknown or it is mapped to a
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* different URI.
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*/
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private boolean startPrefixMapping(String prefix, String uri)
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throws SAXException
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{
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boolean pushed = true;
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Stack uriStack = (Stack) _nsPrefixes.get(prefix);
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if (uriStack != null) {
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if (uriStack.isEmpty()) {
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_sax.startPrefixMapping(prefix, uri);
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uriStack.push(uri);
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}
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else {
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final String lastUri = (String) uriStack.peek();
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if (!lastUri.equals(uri)) {
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_sax.startPrefixMapping(prefix, uri);
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uriStack.push(uri);
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}
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else {
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pushed = false;
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}
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}
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}
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else {
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_sax.startPrefixMapping(prefix, uri);
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_nsPrefixes.put(prefix, uriStack = new Stack());
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uriStack.push(uri);
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}
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return pushed;
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}
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/*
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* End the scope of a name prefix by popping it from the stack and
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* passing the event to the SAX Handler.
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*/
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private void endPrefixMapping(String prefix)
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throws SAXException
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{
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final Stack uriStack = (Stack) _nsPrefixes.get(prefix);
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if (uriStack != null) {
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_sax.endPrefixMapping(prefix);
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uriStack.pop();
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}
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}
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/**
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* If the DOM was created using a DOM 1.0 API, the local name may be
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* null. If so, get the local name from the qualified name before
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* generating the SAX event.
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*/
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private static String getLocalName(Node node) {
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final String localName = node.getLocalName();
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if (localName == null) {
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final String qname = node.getNodeName();
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final int col = qname.lastIndexOf(':');
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return (col > 0) ? qname.substring(col + 1) : qname;
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}
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return localName;
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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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_sax.startDocument();
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parse(_dom);
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_sax.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 SAX events for a handler. A
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* startElement() event passes all attributes, including namespace
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* declarations.
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*/
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private void parse(Node node) throws IOException, SAXException {
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Node first = null;
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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_FRAGMENT_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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final String cdata = node.getNodeValue();
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if (_lex != null) {
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_lex.startCDATA();
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_sax.characters(cdata.toCharArray(), 0, cdata.length());
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_lex.endCDATA();
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}
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else {
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// in the case where there is no lex handler, we still
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// want the text of the cdate to make its way through.
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_sax.characters(cdata.toCharArray(), 0, cdata.length());
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}
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break;
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case Node.COMMENT_NODE: // should be handled!!!
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if (_lex != null) {
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final String value = node.getNodeValue();
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_lex.comment(value.toCharArray(), 0, value.length());
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}
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break;
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case Node.DOCUMENT_NODE:
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_sax.setDocumentLocator(this);
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_sax.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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_sax.endDocument();
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break;
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case Node.ELEMENT_NODE:
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String prefix;
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Vector pushedPrefixes = new Vector();
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final AttributesImpl attrs = new AttributesImpl();
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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 declarations
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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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// Ignore everything but NS declarations here
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if (qnameAttr.startsWith(XMLNS_PREFIX)) {
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final String uriAttr = attr.getNodeValue();
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final int colon = qnameAttr.lastIndexOf(':');
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prefix = (colon > 0) ? qnameAttr.substring(colon + 1) : EMPTYSTRING;
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if (startPrefixMapping(prefix, uriAttr)) {
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pushedPrefixes.addElement(prefix);
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}
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}
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}
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// Process all other attributes
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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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String qnameAttr = attr.getNodeName();
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// Ignore NS declarations here
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if (!qnameAttr.startsWith(XMLNS_PREFIX)) {
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final String uriAttr = attr.getNamespaceURI();
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final String localNameAttr = getLocalName(attr);
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// Uri may be implicitly declared
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if (uriAttr != null) {
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final int colon = qnameAttr.lastIndexOf(':');
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if (colon > 0) {
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prefix = qnameAttr.substring(0, colon);
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}
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else {
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// If no prefix for this attr, we need to create
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// one because we cannot use the default ns
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prefix = BasisLibrary.generatePrefix();
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qnameAttr = prefix + ':' + qnameAttr;
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}
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if (startPrefixMapping(prefix, uriAttr)) {
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pushedPrefixes.addElement(prefix);
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}
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}
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// Add attribute to list
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attrs.addAttribute(attr.getNamespaceURI(), getLocalName(attr),
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qnameAttr, "CDATA", attr.getNodeValue());
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}
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}
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// Now process the element itself
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final String qname = node.getNodeName();
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final String uri = node.getNamespaceURI();
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final String localName = getLocalName(node);
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// Uri may be implicitly declared
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if (uri != null) {
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final int colon = qname.lastIndexOf(':');
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prefix = (colon > 0) ? qname.substring(0, colon) : EMPTYSTRING;
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if (startPrefixMapping(prefix, uri)) {
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pushedPrefixes.addElement(prefix);
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}
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}
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// Generate SAX event to start element
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if (_saxImpl != null) {
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_saxImpl.startElement(uri, localName, qname, attrs, node);
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}
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else {
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_sax.startElement(uri, localName, qname, attrs);
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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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_sax.endElement(uri, localName, qname);
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// Generate endPrefixMapping() for all pushed prefixes
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final int nPushedPrefixes = pushedPrefixes.size();
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for (int i = 0; i < nPushedPrefixes; i++) {
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endPrefixMapping((String) pushedPrefixes.elementAt(i));
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}
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break;
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case Node.PROCESSING_INSTRUCTION_NODE:
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_sax.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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final String data = node.getNodeValue();
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_sax.characters(data.toCharArray(), 0, data.length());
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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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363 |
/**
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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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370 |
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371 |
/**
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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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378 |
/**
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379 |
* This class is only used internally so this method should never
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380 |
* 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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386 |
|
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387 |
/**
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388 |
* This class is only used internally so this method should never
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389 |
* be called.
|
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390 |
*/
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391 |
public EntityResolver getEntityResolver() {
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392 |
return null;
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393 |
}
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394 |
|
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395 |
/**
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396 |
* This class is only used internally so this method should never
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397 |
* be called.
|
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*/
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399 |
public void setErrorHandler(ErrorHandler handler) throws
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400 |
NullPointerException
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401 |
{
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402 |
}
|
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403 |
|
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404 |
/**
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405 |
* This class is only used internally so this method should never
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406 |
* be called.
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407 |
*/
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408 |
public void setProperty(String name, Object value) throws
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409 |
SAXNotRecognizedException, SAXNotSupportedException {
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410 |
}
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411 |
|
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412 |
/**
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413 |
* This class is only used internally so this method should never
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414 |
* be called.
|
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415 |
*/
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416 |
public Object getProperty(String name) throws SAXNotRecognizedException,
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417 |
SAXNotSupportedException
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418 |
{
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419 |
return null;
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420 |
}
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421 |
|
|
422 |
/**
|
|
423 |
* This class is only used internally so this method should never
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424 |
* be called.
|
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425 |
*/
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426 |
public int getColumnNumber() {
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427 |
return 0;
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428 |
}
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429 |
|
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430 |
/**
|
|
431 |
* This class is only used internally so this method should never
|
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432 |
* be called.
|
|
433 |
*/
|
|
434 |
public int getLineNumber() {
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435 |
return 0;
|
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436 |
}
|
|
437 |
|
|
438 |
/**
|
|
439 |
* This class is only used internally so this method should never
|
|
440 |
* be called.
|
|
441 |
*/
|
|
442 |
public String getPublicId() {
|
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443 |
return null;
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|
444 |
}
|
|
445 |
|
|
446 |
/**
|
|
447 |
* This class is only used internally so this method should never
|
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448 |
* be called.
|
|
449 |
*/
|
|
450 |
public String getSystemId() {
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451 |
return null;
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|
452 |
}
|
|
453 |
|
|
454 |
// Debugging
|
|
455 |
private String getNodeTypeFromCode(short code) {
|
|
456 |
String retval = null;
|
|
457 |
switch (code) {
|
|
458 |
case Node.ATTRIBUTE_NODE :
|
|
459 |
retval = "ATTRIBUTE_NODE"; break;
|
|
460 |
case Node.CDATA_SECTION_NODE :
|
|
461 |
retval = "CDATA_SECTION_NODE"; break;
|
|
462 |
case Node.COMMENT_NODE :
|
|
463 |
retval = "COMMENT_NODE"; break;
|
|
464 |
case Node.DOCUMENT_FRAGMENT_NODE :
|
|
465 |
retval = "DOCUMENT_FRAGMENT_NODE"; break;
|
|
466 |
case Node.DOCUMENT_NODE :
|
|
467 |
retval = "DOCUMENT_NODE"; break;
|
|
468 |
case Node.DOCUMENT_TYPE_NODE :
|
|
469 |
retval = "DOCUMENT_TYPE_NODE"; break;
|
|
470 |
case Node.ELEMENT_NODE :
|
|
471 |
retval = "ELEMENT_NODE"; break;
|
|
472 |
case Node.ENTITY_NODE :
|
|
473 |
retval = "ENTITY_NODE"; break;
|
|
474 |
case Node.ENTITY_REFERENCE_NODE :
|
|
475 |
retval = "ENTITY_REFERENCE_NODE"; break;
|
|
476 |
case Node.NOTATION_NODE :
|
|
477 |
retval = "NOTATION_NODE"; break;
|
|
478 |
case Node.PROCESSING_INSTRUCTION_NODE :
|
|
479 |
retval = "PROCESSING_INSTRUCTION_NODE"; break;
|
|
480 |
case Node.TEXT_NODE:
|
|
481 |
retval = "TEXT_NODE"; break;
|
|
482 |
}
|
|
483 |
return retval;
|
|
484 |
}
|
|
485 |
}
|