/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* bdoughan - June 24/2009 - 2.0 - Initial implementation
******************************************************************************/
package org.eclipse.persistence.internal.oxm.record;
import javax.xml.stream.XMLStreamReader;
import org.eclipse.persistence.internal.oxm.Constants;
import org.eclipse.persistence.internal.oxm.Unmarshaller;
import org.eclipse.persistence.internal.oxm.record.namespaces.UnmarshalNamespaceContext;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.ext.Locator2;
/**
* Convert an XMLStreamReader into SAX events.
*/
public class XMLStreamReaderReader extends XMLReaderAdapter {
private int depth = 0;
private UnmarshalNamespaceContext unmarshalNamespaceContext;
private XMLStreamReaderAttributes indexedAttributeList;
private boolean qNameAware;
private XMLStreamReader xmlStreamReader;
public XMLStreamReaderReader() {
unmarshalNamespaceContext = new UnmarshalNamespaceContext();
indexedAttributeList = new XMLStreamReaderAttributes();
}
public XMLStreamReaderReader(Unmarshaller xmlUnmarshaller) {
super(xmlUnmarshaller);
unmarshalNamespaceContext = new UnmarshalNamespaceContext();
indexedAttributeList = new XMLStreamReaderAttributes();
}
@Override
public Locator getLocator(){
if(locator == null){
locator = new StreamReaderLocator(xmlStreamReader);
}
return locator;
}
@Override
public void setContentHandler (ContentHandler handler) {
if(handler instanceof UnmarshalRecord){
((UnmarshalRecord)handler).setUnmarshalNamespaceResolver(unmarshalNamespaceContext);
qNameAware = false;
if(null == validatingContentHandler) {
this.contentHandler = (UnmarshalRecord) handler;
}else{
validatingContentHandler.setContentHandler(handler);
}
}else if(handler instanceof SAXUnmarshallerHandler){
((SAXUnmarshallerHandler)handler).setUnmarshalNamespaceResolver(unmarshalNamespaceContext);
qNameAware = true;
if(null == validatingContentHandler) {
this.contentHandler = (SAXUnmarshallerHandler) handler;
}else{
validatingContentHandler.setContentHandler(handler);
}
} else {
super.setContentHandler(handler);
qNameAware = true;
}
}
@Override
public void parse(InputSource input) throws SAXException {
if(null == contentHandler) {
return;
}
if(input instanceof XMLStreamReaderInputSource) {
XMLStreamReader xmlStreamReader = ((XMLStreamReaderInputSource) input).getXmlStreamReader();
parse(xmlStreamReader);
}
}
public void parse(XMLStreamReader xmlStreamReader) throws SAXException {
this.xmlStreamReader = xmlStreamReader;
unmarshalNamespaceContext.setXmlStreamReader(xmlStreamReader);
indexedAttributeList.setXmlStreamReader(xmlStreamReader);
try {
contentHandler.startDocument();
parseEvent(xmlStreamReader, xmlStreamReader.getEventType());
while(depth > 0) {
int eventType = xmlStreamReader.next();
parseEvent(xmlStreamReader, eventType);
}
if(xmlStreamReader.hasNext()) {
xmlStreamReader.next();
}
contentHandler.endDocument();
} catch(SAXException e ) {
throw e;
} catch(Exception e) {
throw new SAXException(e);
}
}
private void parseEvent(XMLStreamReader xmlStreamReader, int eventType) throws SAXException {
switch (eventType) {
case XMLStreamReader.START_ELEMENT: {
depth++;
int namespaceCount = xmlStreamReader.getNamespaceCount();
if(namespaceCount > 0) {
for(int x=0; x<namespaceCount; x++) {
contentHandler.startPrefixMapping(xmlStreamReader.getNamespacePrefix(x), xmlStreamReader.getNamespaceURI(x));
}
}
String localName = xmlStreamReader.getLocalName();
String namespaceURI = xmlStreamReader.getNamespaceURI();
if(Constants.EMPTY_STRING.equals(namespaceURI)) {
namespaceURI = null;
}
if(qNameAware) {
String prefix = xmlStreamReader.getPrefix();
if(null == prefix || prefix.length() == 0) {
contentHandler.startElement(namespaceURI, localName, localName, indexedAttributeList.reset());
} else {
contentHandler.startElement(namespaceURI, localName, prefix + Constants.COLON + localName, indexedAttributeList.reset());
}
} else {
contentHandler.startElement(namespaceURI, localName, null, indexedAttributeList.reset());
}
break;
}
case XMLStreamReader.END_ELEMENT: {
depth--;
String localName = xmlStreamReader.getLocalName();
String namespaceURI = xmlStreamReader.getNamespaceURI();
if(Constants.EMPTY_STRING.equals(namespaceURI)) {
namespaceURI = null;
}
if(qNameAware) {
String prefix = xmlStreamReader.getPrefix();
if(null == prefix || prefix.length() == 0) {
contentHandler.endElement(namespaceURI, localName, localName);
} else {
contentHandler.endElement(namespaceURI, localName, prefix + Constants.COLON + localName);
}
} else {
contentHandler.endElement(namespaceURI, localName, null);
}
int namespaceCount = xmlStreamReader.getNamespaceCount();
if(namespaceCount > 0) {
for(int x=0; x<namespaceCount; x++) {
contentHandler.endPrefixMapping(xmlStreamReader.getNamespacePrefix(x));
}
}
break;
}
case XMLStreamReader.PROCESSING_INSTRUCTION: {
contentHandler.processingInstruction(xmlStreamReader.getPITarget(), xmlStreamReader.getPIData());
break;
}
case XMLStreamReader.CHARACTERS: {
parseCharactersEvent(xmlStreamReader);
break;
}
case XMLStreamReader.COMMENT: {
if(null != lexicalHandler) {
lexicalHandler.comment(xmlStreamReader.getTextCharacters(), xmlStreamReader.getTextStart(), xmlStreamReader.getTextLength());
}
break;
}
case XMLStreamReader.SPACE: {
contentHandler.characters(xmlStreamReader.getTextCharacters(), xmlStreamReader.getTextStart(), xmlStreamReader.getTextLength());
break;
}
case XMLStreamReader.START_DOCUMENT: {
depth++;
break;
}
case XMLStreamReader.END_DOCUMENT: {
depth--;
return;
}
case XMLStreamReader.ENTITY_REFERENCE: {
break;
}
case XMLStreamReader.ATTRIBUTE: {
break;
}
case XMLStreamReader.DTD: {
break;
}
case XMLStreamReader.CDATA: {
if(null == lexicalHandler) {
parseCharactersEvent(xmlStreamReader);
} else {
lexicalHandler.startCDATA();
parseCharactersEvent(xmlStreamReader);
lexicalHandler.endCDATA();
}
break;
}
}
}
/**
* Subclasses of this class can override this method to provide alternate
* mechanisms for processing the characters event. One possibility is
* obtaining a CharSequence and calling the corresponding characters method
* on the extended content handler.
*/
protected void parseCharactersEvent(XMLStreamReader xmlStreamReader) throws SAXException {
contentHandler.characters(xmlStreamReader.getTextCharacters(), xmlStreamReader.getTextStart(), xmlStreamReader.getTextLength());
}
private static class XMLStreamReaderAttributes extends IndexedAttributeList {
private XMLStreamReader xmlStreamReader;
public void setXmlStreamReader(XMLStreamReader xmlStreamReader) {
this.xmlStreamReader = xmlStreamReader;
}
@Override
protected Attribute[] attributes() {
if(null == attributes) {
int namespaceCount = xmlStreamReader.getNamespaceCount();
int attributeCount = xmlStreamReader.getAttributeCount();
if(namespaceCount + attributeCount == 0) {
attributes = NO_ATTRIBUTES;
} else {
attributes = new Attribute[attributeCount + namespaceCount];
for(int x=0; x<attributeCount; x++) {
String uri = xmlStreamReader.getAttributeNamespace(x);
String localName = xmlStreamReader.getAttributeLocalName(x);
String prefix = xmlStreamReader.getAttributePrefix(x);
String qName;
if(null == prefix || prefix.length() == 0) {
qName = localName;
} else {
qName = prefix + Constants.COLON + localName;
}
String value = xmlStreamReader.getAttributeValue(x);
attributes[x] = new Attribute(uri, localName, qName, value);
}
for(int x=0; x<namespaceCount; x++) {
String uri = javax.xml.XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
String localName = xmlStreamReader.getNamespacePrefix(x);
String qName;
if(null == localName || localName.length() == 0) {
localName = javax.xml.XMLConstants.XMLNS_ATTRIBUTE;
qName = javax.xml.XMLConstants.XMLNS_ATTRIBUTE;
} else {
qName = javax.xml.XMLConstants.XMLNS_ATTRIBUTE + Constants.COLON + localName;
}
String value = xmlStreamReader.getNamespaceURI(x);
attributes[x + attributeCount] = new Attribute(uri, localName, qName, value);
}
}
}
return attributes;
}
@Override
public String getValue(String uri, String localName) {
if (Constants.EMPTY_STRING.equals(uri)) {
uri = null;
}
return xmlStreamReader.getAttributeValue(uri, localName);
}
}
// Made static for performance reasons.
/**
* <p>An implementation of Locator, created from an existing XMLStreamReader.</p>
*
* @see org.xml.sax.Locator
* @see javax.xml.stream.XMLStreamReader
*/
private static class StreamReaderLocator implements Locator2 {
private XMLStreamReader reader;
/**
* Instantiates a new StreamReaderLocator.
*
* @param r the XMLStreamReader object from which to copy location information.
*/
public StreamReaderLocator(XMLStreamReader r) {
this.reader = r;
}
/**
* Returns the public ID of this Locator.
*/
@Override
public String getPublicId() {
return this.reader.getLocation().getPublicId();
}
/**
* Returns the system ID of this Locator.
*/
@Override
public String getSystemId() {
return this.reader.getLocation().getSystemId();
}
/**
* Returns the line number of this Locator.
*/
@Override
public int getLineNumber() {
return this.reader.getLocation().getLineNumber();
}
/**
* Returns the column number of this Locator.
*/
@Override
public int getColumnNumber() {
return this.reader.getLocation().getColumnNumber();
}
@Override
public String getXMLVersion() {
return null;
}
@Override
public String getEncoding() {
return null;
}
}
}