| /* Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.xmlbeans.impl.common; |
| |
| import org.w3c.dom.Node; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.ProcessingInstruction; |
| import org.w3c.dom.Comment; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.helpers.DefaultHandler; |
| import org.xml.sax.ext.LexicalHandler; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import java.util.Stack; |
| import java.util.Vector; |
| |
| public class Sax2Dom |
| extends DefaultHandler |
| implements ContentHandler, LexicalHandler |
| { |
| public static final String EMPTYSTRING = ""; |
| public static final String XML_PREFIX = "xml"; |
| public static final String XMLNS_PREFIX = "xmlns"; |
| public static final String XMLNS_STRING = "xmlns:"; |
| public static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/"; |
| |
| private Node _root = null; |
| private Document _document = null; |
| private Stack _nodeStk = new Stack(); |
| private Vector _namespaceDecls = null; |
| |
| public Sax2Dom() throws ParserConfigurationException |
| { |
| final DocumentBuilderFactory factory = |
| DocumentBuilderFactory.newInstance(); |
| _document = factory.newDocumentBuilder().newDocument(); |
| _root = _document; |
| } |
| |
| public Sax2Dom(Node root) throws ParserConfigurationException |
| { |
| _root = root; |
| if (root instanceof Document) |
| { |
| _document = (Document) root; |
| } |
| else if (root != null) |
| { |
| _document = root.getOwnerDocument(); |
| } |
| else |
| { |
| final DocumentBuilderFactory factory = |
| DocumentBuilderFactory.newInstance(); |
| _document = factory.newDocumentBuilder().newDocument(); |
| _root = _document; |
| } |
| } |
| |
| public Node getDOM() |
| { |
| return _root; |
| } |
| |
| public void characters(char[] ch, int start, int length) |
| { |
| final Node last = (Node) _nodeStk.peek(); |
| |
| // No text nodes can be children of root (DOM006 exception) |
| if (last != _document) |
| { |
| final String text = new String(ch, start, length); |
| last.appendChild(_document.createTextNode(text)); |
| } |
| } |
| |
| public void startDocument() |
| { |
| _nodeStk.push(_root); |
| } |
| |
| public void endDocument() |
| { |
| _nodeStk.pop(); |
| } |
| |
| public void startElement(String namespace, String localName, String qName, |
| Attributes attrs) |
| { |
| final Element tmp = (Element) _document.createElementNS(namespace, qName); |
| |
| // Add namespace declarations first |
| if (_namespaceDecls != null) |
| { |
| final int nDecls = _namespaceDecls.size(); |
| for (int i = 0; i < nDecls; i++) |
| { |
| final String prefix = (String) _namespaceDecls.elementAt(i++); |
| |
| if (prefix == null || prefix.equals(EMPTYSTRING)) |
| { |
| tmp.setAttributeNS(XMLNS_URI, XMLNS_PREFIX, |
| (String) _namespaceDecls.elementAt(i)); |
| } |
| else |
| { |
| tmp.setAttributeNS(XMLNS_URI, XMLNS_STRING + prefix, |
| (String) _namespaceDecls.elementAt(i)); |
| } |
| } |
| _namespaceDecls.clear(); |
| } |
| |
| // Add attributes to element |
| final int nattrs = attrs.getLength(); |
| for (int i = 0; i < nattrs; i++) |
| { |
| if (attrs.getLocalName(i) == null) |
| { |
| tmp.setAttribute(attrs.getQName(i), attrs.getValue(i)); |
| } |
| else |
| { |
| tmp.setAttributeNS(attrs.getURI(i), attrs.getQName(i), |
| attrs.getValue(i)); |
| } |
| } |
| |
| // Append this new node onto current stack node |
| Node last = (Node) _nodeStk.peek(); |
| last.appendChild(tmp); |
| |
| // Push this node onto stack |
| _nodeStk.push(tmp); |
| } |
| |
| public void endElement(String namespace, String localName, String qName) |
| { |
| _nodeStk.pop(); |
| } |
| |
| public void startPrefixMapping(String prefix, String uri) |
| { |
| if (_namespaceDecls == null) |
| { |
| _namespaceDecls = new Vector(2); |
| } |
| _namespaceDecls.addElement(prefix); |
| _namespaceDecls.addElement(uri); |
| } |
| |
| public void endPrefixMapping(String prefix) |
| { |
| // do nothing |
| } |
| |
| /** |
| * This class is only used internally so this method should never |
| * be called. |
| */ |
| public void ignorableWhitespace(char[] ch, int start, int length) |
| { |
| } |
| |
| /** |
| * adds processing instruction node to DOM. |
| */ |
| public void processingInstruction(String target, String data) |
| { |
| final Node last = (Node) _nodeStk.peek(); |
| ProcessingInstruction pi = _document.createProcessingInstruction( |
| target, data); |
| if (pi != null) last.appendChild(pi); |
| } |
| |
| /** |
| * This class is only used internally so this method should never |
| * be called. |
| */ |
| public void setDocumentLocator(Locator locator) |
| { |
| } |
| |
| /** |
| * This class is only used internally so this method should never |
| * be called. |
| */ |
| public void skippedEntity(String name) |
| { |
| } |
| |
| |
| /** |
| * Lexical Handler method to create comment node in DOM tree. |
| */ |
| public void comment(char[] ch, int start, int length) |
| { |
| final Node last = (Node) _nodeStk.peek(); |
| Comment comment = _document.createComment(new String(ch, start, length)); |
| if (comment != null) last.appendChild(comment); |
| } |
| |
| // Lexical Handler methods- not implemented |
| public void startCDATA() |
| { |
| } |
| |
| public void endCDATA() |
| { |
| } |
| |
| public void startEntity(java.lang.String name) |
| { |
| } |
| |
| public void endEntity(String name) |
| { |
| } |
| |
| public void startDTD(String name, String publicId, String systemId) |
| throws SAXException |
| { |
| } |
| |
| public void endDTD() |
| { |
| } |
| } |