/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* https://jaxp.dev.java.net/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* https://jaxp.dev.java.net/CDDLv1.0.html
* If applicable add the following below this CDDL HEADER
* with the fields enclosed by brackets "[]" replaced with
* your own identifying information: Portions Copyright
* [year] [name of copyright owner]
*/
/*
* $Id: StAXStream2SAX.java,v 1.7 2007/05/16 15:03:52 spericas Exp $
* @(#)StAXStream2SAX.java 1.7 07/05/29
*
* Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
*/
package com.sun.org.apache.xalan.internal.xsltc.trax;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Stack;
import java.util.Vector;
import java.util.Iterator;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.ext.Locator2;
import org.xml.sax.helpers.AttributesImpl;
import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.Namespace;
import javax.xml.stream.events.ProcessingInstruction;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.StartDocument;
import javax.xml.stream.events.XMLEvent;
/**
* @author Padmaja Vedula
* @author Sunitha Reddy
*/
public class StAXStream2SAX implements XMLReader, Locator {
//private final static String EMPTYSTRING = "";
//private static final String XMLNS_PREFIX = "xmlns";
// StAX Stream source
private final XMLStreamReader staxStreamReader;
//private Node _dom = null;
private ContentHandler _sax = null;
private LexicalHandler _lex = null;
private SAXImpl _saxImpl = null;
//private Hashtable _nsPrefixes = new Hashtable();
public StAXStream2SAX(XMLStreamReader staxSrc) {
staxStreamReader = staxSrc;
}
public ContentHandler getContentHandler() {
return _sax;
}
public void setContentHandler(ContentHandler handler) throws
NullPointerException
{
_sax = handler;
if (handler instanceof LexicalHandler) {
_lex = (LexicalHandler) handler;
}
if (handler instanceof SAXImpl) {
_saxImpl = (SAXImpl)handler;
}
}
public void parse(InputSource unused) throws IOException, SAXException {
try {
bridge();
} catch (XMLStreamException e) {
throw new SAXException(e);
}
}
//Main Work Starts Here.
public void parse() throws IOException, SAXException, XMLStreamException {
bridge();
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void parse(String sysId) throws IOException, SAXException {
throw new IOException("This method is not yet implemented.");
}
public void bridge() throws XMLStreamException {
try {
// remembers the nest level of elements to know when we are done.
int depth=0;
// skip over START_DOCUMENT
int event = staxStreamReader.getEventType();
if (event == XMLStreamConstants.START_DOCUMENT) {
event = staxStreamReader.next();
}
// If not a START_ELEMENT (e.g., a DTD), skip to next tag
if (event != XMLStreamConstants.START_ELEMENT) {
event = staxStreamReader.nextTag();
// An error if a START_ELEMENT isn't found now
if (event != XMLStreamConstants.START_ELEMENT) {
throw new IllegalStateException("The current event is " +
"not START_ELEMENT\n but" + event);
}
}
handleStartDocument();
do {
// These are all of the events listed in the javadoc for
// XMLEvent.
// The spec only really describes 11 of them.
switch (event) {
case XMLStreamConstants.START_ELEMENT :
depth++;
handleStartElement();
break;
case XMLStreamConstants.END_ELEMENT :
handleEndElement();
depth--;
break;
case XMLStreamConstants.CHARACTERS :
handleCharacters();
break;
case XMLStreamConstants.ENTITY_REFERENCE :
handleEntityReference();
break;
case XMLStreamConstants.PROCESSING_INSTRUCTION :
handlePI();
break;
case XMLStreamConstants.COMMENT :
handleComment();
break;
case XMLStreamConstants.DTD :
handleDTD();
break;
case XMLStreamConstants.ATTRIBUTE :
handleAttribute();
break;
case XMLStreamConstants.NAMESPACE :
handleNamespace();
break;
case XMLStreamConstants.CDATA :
handleCDATA();
break;
case XMLStreamConstants.ENTITY_DECLARATION :
handleEntityDecl();
break;
case XMLStreamConstants.NOTATION_DECLARATION :
handleNotationDecl();
break;
case XMLStreamConstants.SPACE :
handleSpace();
break;
default :
throw new InternalError("processing event: " + event);
}
event=staxStreamReader.next();
} while (depth!=0);
handleEndDocument();
} catch (SAXException e) {
throw new XMLStreamException(e);
}
}
private void handleEndDocument() throws SAXException {
_sax.endDocument();
}
private void handleStartDocument() throws SAXException {
_sax.setDocumentLocator(new Locator2() {
public int getColumnNumber() {
return staxStreamReader.getLocation().getColumnNumber();
}
public int getLineNumber() {
return staxStreamReader.getLocation().getLineNumber();
}
public String getPublicId() {
return staxStreamReader.getLocation().getPublicId();
}
public String getSystemId() {
return staxStreamReader.getLocation().getSystemId();
}
public String getXMLVersion() {
return staxStreamReader.getVersion();
}
public String getEncoding() {
return staxStreamReader.getEncoding();
}
});
_sax.startDocument();
}
private void handlePI() throws XMLStreamException {
try {
_sax.processingInstruction(
staxStreamReader.getPITarget(),
staxStreamReader.getPIData());
} catch (SAXException e) {
throw new XMLStreamException(e);
}
}
private void handleCharacters() throws XMLStreamException {
// workaround for bugid 5046319 - switch over to commented section
// below when it is fixed.
int textLength = staxStreamReader.getTextLength();
char[] chars = new char[textLength];
staxStreamReader.getTextCharacters(0, chars, 0, textLength);
try {
_sax.characters(chars, 0, chars.length);
} catch (SAXException e) {
throw new XMLStreamException(e);
}
// int start = 0;
// int len;
// do {
// len = staxStreamReader.getTextCharacters(start, buf, 0, buf.length);
// start += len;
// try {
// _sax.characters(buf, 0, len);
// } catch (SAXException e) {
// throw new XMLStreamException(e);
// }
// } while (len == buf.length);
}
private void handleEndElement() throws XMLStreamException {
QName qName = staxStreamReader.getName();
try {
//construct prefix:localName from qName
String qname = "";
if (qName.getPrefix() != null && qName.getPrefix().trim().length() != 0){
qname = qName.getPrefix() + ":";
}
qname += qName.getLocalPart();
// fire endElement
_sax.endElement(
qName.getNamespaceURI(),
qName.getLocalPart(),
qname);
// end namespace bindings
int nsCount = staxStreamReader.getNamespaceCount();
for (int i = nsCount - 1; i >= 0; i--) {
String prefix = staxStreamReader.getNamespacePrefix(i);
if (prefix == null) { // true for default namespace
prefix = "";
}
_sax.endPrefixMapping(prefix);
}
} catch (SAXException e) {
throw new XMLStreamException(e);
}
}
private void handleStartElement() throws XMLStreamException {
try {
// start namespace bindings
int nsCount = staxStreamReader.getNamespaceCount();
for (int i = 0; i < nsCount; i++) {
String prefix = staxStreamReader.getNamespacePrefix(i);
if (prefix == null) { // true for default namespace
prefix = "";
}
_sax.startPrefixMapping(
prefix,
staxStreamReader.getNamespaceURI(i));
}
// fire startElement
QName qName = staxStreamReader.getName();
String prefix = qName.getPrefix();
String rawname;
if(prefix==null || prefix.length()==0)
rawname = qName.getLocalPart();
else
rawname = prefix + ':' + qName.getLocalPart();
Attributes attrs = getAttributes();
_sax.startElement(
qName.getNamespaceURI(),
qName.getLocalPart(),
rawname,
attrs);
} catch (SAXException e) {
throw new XMLStreamException(e);
}
}
/**
* Get the attributes associated with the given START_ELEMENT or ATTRIBUTE
* StAXevent.
*
* @return the StAX attributes converted to an org.xml.sax.Attributes
*/
private Attributes getAttributes() {
AttributesImpl attrs = new AttributesImpl();
int eventType = staxStreamReader.getEventType();
if (eventType != XMLStreamConstants.ATTRIBUTE
&& eventType != XMLStreamConstants.START_ELEMENT) {
throw new InternalError(
"getAttributes() attempting to process: " + eventType);
}
// in SAX, namespace declarations are not part of attributes by default.
// (there's a property to control that, but as far as we are concerned
// we don't use it.) So don't add xmlns:* to attributes.
// gather non-namespace attrs
for (int i = 0; i < staxStreamReader.getAttributeCount(); i++) {
String uri = staxStreamReader.getAttributeNamespace(i);
if(uri==null) uri="";
String localName = staxStreamReader.getAttributeLocalName(i);
String prefix = staxStreamReader.getAttributePrefix(i);
String qName;
if(prefix==null || prefix.length()==0)
qName = localName;
else
qName = prefix + ':' + localName;
String type = staxStreamReader.getAttributeType(i);
String value = staxStreamReader.getAttributeValue(i);
attrs.addAttribute(uri, localName, qName, type, value);
}
return attrs;
}
private void handleNamespace() {
// no-op ???
// namespace events don't normally occur outside of a startElement
// or endElement
}
private void handleAttribute() {
// no-op ???
// attribute events don't normally occur outside of a startElement
// or endElement
}
private void handleDTD() {
// no-op ???
// it seems like we need to pass this info along, but how?
}
private void handleComment() {
// no-op ???
}
private void handleEntityReference() {
// no-op ???
}
private void handleSpace() {
// no-op ???
// this event is listed in the javadoc, but not in the spec.
}
private void handleNotationDecl() {
// no-op ???
// this event is listed in the javadoc, but not in the spec.
}
private void handleEntityDecl() {
// no-op ???
// this event is listed in the javadoc, but not in the spec.
}
private void handleCDATA() {
// no-op ???
// this event is listed in the javadoc, but not in the spec.
}
/**
* This class is only used internally so this method should never
* be called.
*/
public DTDHandler getDTDHandler() {
return null;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public ErrorHandler getErrorHandler() {
return null;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public boolean getFeature(String name) throws SAXNotRecognizedException,
SAXNotSupportedException
{
return false;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void setFeature(String name, boolean value) throws
SAXNotRecognizedException, SAXNotSupportedException
{
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void setDTDHandler(DTDHandler handler) throws NullPointerException {
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void setEntityResolver(EntityResolver resolver) throws
NullPointerException
{
}
/**
* This class is only used internally so this method should never
* be called.
*/
public EntityResolver getEntityResolver() {
return null;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void setErrorHandler(ErrorHandler handler) throws
NullPointerException
{
}
/**
* This class is only used internally so this method should never
* be called.
*/
public void setProperty(String name, Object value) throws
SAXNotRecognizedException, SAXNotSupportedException {
}
/**
* This class is only used internally so this method should never
* be called.
*/
public Object getProperty(String name) throws SAXNotRecognizedException,
SAXNotSupportedException
{
return null;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public int getColumnNumber() {
return 0;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public int getLineNumber() {
return 0;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public String getPublicId() {
return null;
}
/**
* This class is only used internally so this method should never
* be called.
*/
public String getSystemId() {
return null;
}
}
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