| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.ws.util.xml; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamWriter; |
| import java.util.Stack; |
| |
| /** |
| * This is a simple utility class that adapts SAX events into StAX |
| * {@link XMLStreamWriter} events, bridging between |
| * the two parser technologies. |
| * |
| * This ContentHandler does not own the XMLStreamWriter. Therefore, it will |
| * not close or flush the writer at any point. |
| * |
| * @author Ryan.Shoemaker@Sun.COM |
| * @version 1.0 |
| */ |
| public class ContentHandlerToXMLStreamWriter extends DefaultHandler { |
| |
| // SAX events will be sent to this XMLStreamWriter |
| private final XMLStreamWriter staxWriter; |
| |
| // storage for prefix bindings |
| private final Stack prefixBindings; |
| |
| public ContentHandlerToXMLStreamWriter(XMLStreamWriter staxCore) { |
| this.staxWriter = staxCore; |
| prefixBindings = new Stack(); // default of 10 seems reasonable |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#endDocument() |
| */ |
| public void endDocument() throws SAXException { |
| try { |
| staxWriter.writeEndDocument(); |
| staxWriter.flush(); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#startDocument() |
| */ |
| public void startDocument() throws SAXException { |
| try { |
| staxWriter.writeStartDocument(); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#characters(char[], int, int) |
| */ |
| public void characters(char[] ch, int start, int length) |
| throws SAXException { |
| |
| try { |
| staxWriter.writeCharacters(ch, start, length); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int) |
| */ |
| public void ignorableWhitespace(char[] ch, int start, int length) |
| throws SAXException { |
| |
| characters(ch,start,length); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#endPrefixMapping(java.lang.String) |
| */ |
| public void endPrefixMapping(String prefix) throws SAXException { |
| // TODO: no-op? |
| |
| // I think we can ignore these SAX events because StAX |
| // automatically scopes the prefix bindings. |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#skippedEntity(java.lang.String) |
| */ |
| public void skippedEntity(String name) throws SAXException { |
| try { |
| staxWriter.writeEntityRef(name); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#setDocumentLocator(org.xml.sax.Locator) |
| */ |
| public void setDocumentLocator(Locator locator) { |
| // TODO: no-op? |
| // there doesn't seem to be any way to pass location info |
| // along to the XMLStreamWriter. On the XMLEventWriter side, you |
| // can set the location info on the event objects. |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#processingInstruction(java.lang.String, |
| * java.lang.String) |
| */ |
| public void processingInstruction(String target, String data) |
| throws SAXException { |
| |
| try { |
| staxWriter.writeProcessingInstruction(target, data); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#startPrefixMapping(java.lang.String, |
| * java.lang.String) |
| */ |
| public void startPrefixMapping(String prefix, String uri) |
| throws SAXException { |
| |
| // defend against parsers that pass null in for "xmlns" prefix |
| if (prefix == null) { |
| prefix = ""; |
| } |
| |
| if (prefix.equals("xml")) { |
| return; |
| } |
| |
| prefixBindings.add(prefix); |
| prefixBindings.add(uri); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#endElement(java.lang.String, |
| * java.lang.String, java.lang.String) |
| */ |
| public void endElement(String namespaceURI, String localName, String qName) |
| throws SAXException { |
| |
| try { |
| // TODO: is this all we have to do? |
| staxWriter.writeEndElement(); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.xml.sax.ContentHandler#startElement(java.lang.String, |
| * java.lang.String, java.lang.String, org.xml.sax.Attributes) |
| */ |
| public void startElement( |
| String namespaceURI, |
| String localName, |
| String qName, |
| Attributes atts) |
| throws SAXException { |
| |
| try { |
| staxWriter.writeStartElement( |
| getPrefix(qName), |
| localName, |
| namespaceURI); |
| |
| String uri, prefix; |
| while (prefixBindings.size() != 0) { |
| uri = (String)prefixBindings.pop(); |
| prefix = (String)prefixBindings.pop(); |
| if (prefix.length() == 0) { |
| staxWriter.setDefaultNamespace(uri); |
| } else { |
| staxWriter.setPrefix(prefix, uri); |
| } |
| |
| // this method handles "", null, and "xmlns" prefixes properly |
| staxWriter.writeNamespace(prefix, uri); |
| } |
| |
| writeAttributes(atts); |
| } catch (XMLStreamException e) { |
| throw new SAXException(e); |
| } |
| |
| } |
| |
| /** |
| * Generate a StAX writeAttribute event for each attribute |
| * |
| * @param atts |
| * attributes from the SAX event |
| */ |
| private void writeAttributes(Attributes atts) throws XMLStreamException { |
| for (int i = 0; i < atts.getLength(); i++) { |
| final String prefix = getPrefix(atts.getQName(i)); |
| if(!prefix.equals("xmlns")) { // defend againts broken transformers that report xmlns decls as attrs |
| staxWriter.writeAttribute( |
| prefix, |
| atts.getURI(i), |
| atts.getLocalName(i), |
| atts.getValue(i)); |
| } |
| } |
| } |
| |
| /** |
| * Pull the prefix off of the specified QName. |
| * |
| * @param qName |
| * the QName |
| * @return the prefix or the empty string if it doesn't exist. |
| */ |
| private String getPrefix(String qName) { |
| int idx = qName.indexOf(':'); |
| if (idx == -1) { |
| return ""; |
| } else { |
| return qName.substring(0, idx); |
| } |
| } |
| |
| } |
