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/*
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* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.org.apache.xalan.internal.xsltc.trax;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import javax.xml.stream.XMLEventFactory;
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import javax.xml.stream.XMLStreamException;
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import javax.xml.stream.events.*;
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import javax.xml.stream.XMLEventWriter;
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import org.xml.sax.Attributes;
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import org.xml.sax.SAXException;
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import org.xml.sax.ext.Locator2;
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/**
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* @author Sunitha Reddy
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*/
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public class SAX2StAXEventWriter extends SAX2StAXBaseWriter {
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private XMLEventWriter writer;
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private XMLEventFactory eventFactory;
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private List namespaceStack = new ArrayList();
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private boolean needToCallStartDocument = false;
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public SAX2StAXEventWriter() {
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eventFactory = XMLEventFactory.newInstance();
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}
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public SAX2StAXEventWriter(XMLEventWriter writer) {
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this.writer = writer;
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eventFactory = XMLEventFactory.newInstance();
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}
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public SAX2StAXEventWriter(XMLEventWriter writer,
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XMLEventFactory factory) {
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this.writer = writer;
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if (factory != null) {
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this.eventFactory = factory;
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} else {
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eventFactory = XMLEventFactory.newInstance();
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}
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}
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public XMLEventWriter getEventWriter() {
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return writer;
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}
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public void setEventWriter(XMLEventWriter writer) {
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this.writer = writer;
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}
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public XMLEventFactory getEventFactory() {
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return eventFactory;
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}
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public void setEventFactory(XMLEventFactory factory) {
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this.eventFactory = factory;
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}
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public void startDocument() throws SAXException {
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super.startDocument();
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namespaceStack.clear();
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eventFactory.setLocation(getCurrentLocation());
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// Encoding and version info will be available only after startElement
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// is called for first time. So, defer START_DOCUMENT event of StAX till
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// that point of time.
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needToCallStartDocument = true;
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}
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private void writeStartDocument() throws SAXException {
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try {
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if (docLocator == null)
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writer.add(eventFactory.createStartDocument());
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else {
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try{
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writer.add(eventFactory.createStartDocument(((Locator2)docLocator).getEncoding(),((Locator2)docLocator).getXMLVersion()));
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} catch(ClassCastException e){
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writer.add(eventFactory.createStartDocument());
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}
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}
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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needToCallStartDocument = false;
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}
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public void endDocument() throws SAXException {
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eventFactory.setLocation(getCurrentLocation());
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try {
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writer.add(eventFactory.createEndDocument());
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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super.endDocument();
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// clear the namespaces
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namespaceStack.clear();
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}
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public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
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if (needToCallStartDocument) {
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writeStartDocument();
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}
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// set document location
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eventFactory.setLocation(getCurrentLocation());
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// create attribute and namespace events
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Collection[] events = {null, null};
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createStartEvents(attributes, events);
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namespaceStack.add(events[0]);
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try {
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String[] qname = {null, null};
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parseQName(qName, qname);
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writer.add(eventFactory.createStartElement(qname[0], uri,
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qname[1], events[1].iterator(), events[0].iterator()));
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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} finally {
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super.startElement(uri, localName, qName, attributes);
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}
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}
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public void endElement(String uri, String localName, String qName)
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throws SAXException {
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super.endElement(uri, localName, qName);
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eventFactory.setLocation(getCurrentLocation());
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// parse name
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String[] qname = {null, null};
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parseQName(qName, qname);
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// get namespaces
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Collection nsList = (Collection) namespaceStack.remove(namespaceStack.size() - 1);
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Iterator nsIter = nsList.iterator();
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try {
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writer.add(eventFactory.createEndElement(qname[0], uri, qname[1],
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nsIter));
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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public void comment(char[] ch, int start, int length) throws SAXException {
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if (needToCallStartDocument) {
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// Drat. We were trying to postpone this until the first element so that we could get
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// the locator, but we can't output a comment before the start document, so we're just
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// going to have to do without the locator if it hasn't been set yet.
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writeStartDocument();
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}
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super.comment(ch, start, length);
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eventFactory.setLocation(getCurrentLocation());
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try {
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writer.add(eventFactory.createComment(new String(ch, start,
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length)));
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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public void characters(char[] ch, int start, int length)
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throws SAXException {
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super.characters(ch, start, length);
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try {
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if (!isCDATA) {
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eventFactory.setLocation(getCurrentLocation());
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writer.add(eventFactory.createCharacters(new String(ch,
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start, length)));
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}
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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public void ignorableWhitespace(char[] ch, int start, int length)
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throws SAXException {
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super.ignorableWhitespace(ch, start, length);
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characters(ch, start, length);
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}
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public void processingInstruction(String target, String data)
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throws SAXException {
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if (needToCallStartDocument) {
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// Drat. We were trying to postpone this until the first element so that we could get
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// the locator, but we can't output a PI before the start document, so we're just
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// going to have to do without the locator if it hasn't been set yet.
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writeStartDocument();
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}
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super.processingInstruction(target, data);
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try {
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writer.add(eventFactory.createProcessingInstruction(target, data));
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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public void endCDATA() throws SAXException {
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eventFactory.setLocation(getCurrentLocation());
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try {
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writer.add(eventFactory.createCData(CDATABuffer.toString()));
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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super.endCDATA();
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}
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protected void createStartEvents(Attributes attributes, Collection[] events) {
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Map nsMap = null;
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List attrs = null;
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// create namespaces
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if (namespaces != null) {
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final int nDecls = namespaces.size();
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for (int i = 0; i < nDecls; i++) {
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final String prefix = (String) namespaces.elementAt(i++);
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String uri = (String) namespaces.elementAt(i);
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Namespace ns = createNamespace(prefix, uri);
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if (nsMap == null) {
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nsMap = new HashMap();
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}
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nsMap.put(prefix, ns);
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}
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}
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// create attributes
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String[] qname = {null, null};
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for (int i = 0, s = attributes.getLength(); i < s; i++) {
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parseQName(attributes.getQName(i), qname);
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String attrPrefix = qname[0];
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String attrLocal = qname[1];
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String attrQName = attributes.getQName(i);
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String attrValue = attributes.getValue(i);
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String attrURI = attributes.getURI(i);
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if ("xmlns".equals(attrQName) || "xmlns".equals(attrPrefix)) {
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// namespace declaration disguised as an attribute. If the
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// namespace has already been declared, skip it, otherwise
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// write it as an namespace
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if (nsMap == null) {
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nsMap = new HashMap();
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}
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if (!nsMap.containsKey(attrLocal)) {
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Namespace ns = createNamespace(attrLocal, attrValue);
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nsMap.put(attrLocal, ns);
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}
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} else {
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Attribute attribute;
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if (attrPrefix.length() > 0) {
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attribute = eventFactory.createAttribute(attrPrefix,
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attrURI, attrLocal, attrValue);
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} else {
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attribute = eventFactory.createAttribute(attrLocal,
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attrValue);
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}
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if (attrs == null) {
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attrs = new ArrayList();
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}
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attrs.add(attribute);
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}
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}
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events[0] = (nsMap == null ? Collections.EMPTY_LIST : nsMap.values());
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events[1] = (attrs == null ? Collections.EMPTY_LIST : attrs);
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}
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protected Namespace createNamespace(String prefix, String uri) {
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if (prefix == null || prefix.length() == 0) {
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return eventFactory.createNamespace(uri);
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} else {
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return eventFactory.createNamespace(prefix, uri);
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}
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}
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}
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