/*******************************************************************************
* Copyright (c) 1998, 2011 Oracle. 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 java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamReader;
import org.eclipse.persistence.internal.oxm.record.namespaces.UnmarshalNamespaceContext;
import org.eclipse.persistence.oxm.XMLConstants;
import org.eclipse.persistence.oxm.XMLUnmarshaller;
import org.eclipse.persistence.oxm.record.UnmarshalRecord;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Convert an XMLStreamReader into SAX events.
*/
public class XMLStreamReaderReader extends XMLReaderAdapter {
private int depth = 0;
private UnmarshalNamespaceContext unmarshalNamespaceContext;
private IndexedAttributeList indexedAttributeList;
private boolean qNameAware;
public XMLStreamReaderReader() {
unmarshalNamespaceContext = new UnmarshalNamespaceContext();
indexedAttributeList = new IndexedAttributeList();
}
public XMLStreamReaderReader(XMLUnmarshaller xmlUnmarshaller) {
super(xmlUnmarshaller);
unmarshalNamespaceContext = new UnmarshalNamespaceContext();
indexedAttributeList = new IndexedAttributeList();
}
@Override
public void setContentHandler (ContentHandler handler) {
super.setContentHandler(handler);
Class handlerClass = handler.getClass();
if(handlerClass == UnmarshalRecord.class){
((UnmarshalRecord)handler).setUnmarshalNamespaceResolver(unmarshalNamespaceContext);
qNameAware = false;
}else if(handlerClass == SAXUnmarshallerHandler.class){
((SAXUnmarshallerHandler)handler).setUnmarshalNamespaceResolver(unmarshalNamespaceContext);
qNameAware = true;
} else {
qNameAware = true;
}
}
@Override
public void parse(InputSource input) throws SAXException {
if(null == contentHandler) {
return;
}
if(input instanceof XMLStreamReaderInputSource) {
XMLStreamReader xmlStreamReader = ((XMLStreamReaderInputSource) input).getXmlStreamReader();
unmarshalNamespaceContext.setXmlStreamReader(xmlStreamReader);
indexedAttributeList.setXmlStreamReader(xmlStreamReader);
parse(xmlStreamReader);
}
}
private void parse(XMLStreamReader xmlStreamReader) throws SAXException {
try {
contentHandler.startDocument();
parseEvent(xmlStreamReader);
while(depth > 0) {
xmlStreamReader.next();
parseEvent(xmlStreamReader);
}
contentHandler.endDocument();
} catch(SAXException e ) {
throw e;
} catch(Exception e) {
throw new SAXException(e);
}
}
private void parseEvent(XMLStreamReader xmlStreamReader) throws SAXException {
switch (xmlStreamReader.getEventType()) {
case XMLStreamReader.START_ELEMENT: {
depth++;
String localName = xmlStreamReader.getLocalName();
String namespaceURI = xmlStreamReader.getNamespaceURI();
if(XMLConstants.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 + XMLConstants.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(XMLConstants.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 + XMLConstants.COLON + localName);
}
} else {
contentHandler.endElement(namespaceURI, localName, null);
}
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: {
char[] characters = xmlStreamReader.getText().toCharArray();
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 IndexedAttributeList implements Attributes {
private XMLStreamReader xmlStreamReader;
private List<Attribute> attributes;
public void setXmlStreamReader(XMLStreamReader xmlStreamReader) {
this.xmlStreamReader = xmlStreamReader;
}
private List<Attribute> attributes() {
if(null == attributes) {
int namespaceCount = xmlStreamReader.getNamespaceCount();
int attributeCount = xmlStreamReader.getAttributeCount();
attributes = new ArrayList<Attribute>(attributeCount + namespaceCount);
for(int x=0; x<namespaceCount; x++) {
String uri = XMLConstants.XMLNS_URL;
String localName = xmlStreamReader.getNamespacePrefix(x);
String qName;
if(null == localName || localName.length() == 0) {
localName = XMLConstants.XMLNS;
qName = XMLConstants.XMLNS;
} else {
qName = XMLConstants.XMLNS + XMLConstants.COLON + localName;
}
String value = xmlStreamReader.getNamespaceURI(x);
attributes.add(new Attribute(uri, localName, qName, value));
}
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 + XMLConstants.COLON + localName;
}
String value = xmlStreamReader.getAttributeValue(x);
attributes.add(new Attribute(uri, localName, qName, value));
}
}
return attributes;
}
public int getIndex(String qName) {
if(null == qName) {
return -1;
}
int index = 0;
for(Attribute attribute : attributes()) {
if(qName.equals(attribute.getName())) {
return index;
}
index++;
}
return -1;
}
public int getIndex(String uri, String localName) {
if(null == localName) {
return -1;
}
int index = 0;
for(Attribute attribute : attributes()) {
QName testQName = new QName(uri, localName);
if(attribute.getQName().equals(testQName)) {
return index;
}
index++;
}
return -1;
}
public int getLength() {
return attributes().size();
}
public String getLocalName(int index) {
return attributes().get(index).getQName().getLocalPart();
}
public String getQName(int index) {
return attributes().get(index).getName();
}
public String getType(int index) {
return XMLConstants.CDATA;
}
public String getType(String name) {
return XMLConstants.CDATA;
}
public String getType(String uri, String localName) {
return XMLConstants.CDATA;
}
public String getURI(int index) {
return attributes().get(index).getQName().getNamespaceURI();
}
public String getValue(int index) {
return attributes().get(index).getValue();
}
public String getValue(String qName) {
int index = getIndex(qName);
if(-1 == index) {
return null;
}
return attributes().get(index).getValue();
}
public String getValue(String uri, String localName) {
int index = getIndex(uri, localName);
if(-1 == index) {
return null;
}
return attributes().get(index).getValue();
}
public IndexedAttributeList reset() {
attributes = null;
return this;
}
}
private static class Attribute {
private QName qName;
private String name;
private String value;
public Attribute(String uri, String localName, String name, String value) {
this.qName = new QName(uri, localName);
this.name = name;
this.value = value;
}
public QName getQName() {
return qName;
}
public String getName() {
return name;
}
public String getValue() {
return value;
}
}
}