Java example source code file (XMLStreamReaderImpl.java)
The XMLStreamReaderImpl.java Java example source code
/*
* Copyright (c) 2005, 2006, 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
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package com.sun.org.apache.xerces.internal.impl;
import com.sun.xml.internal.stream.Entity;
import com.sun.xml.internal.stream.StaxErrorReporter;
import com.sun.xml.internal.stream.XMLEntityStorage;
import com.sun.xml.internal.stream.events.EntityDeclarationImpl;
import com.sun.xml.internal.stream.events.NotationDeclarationImpl;
import javax.xml.namespace.NamespaceContext;
import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.stream.Location;
import javax.xml.stream.events.XMLEvent;
import com.sun.org.apache.xerces.internal.util.NamespaceContextWrapper;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.xml.internal.stream.dtd.nonvalidating.XMLNotationDecl;
import com.sun.xml.internal.stream.dtd.nonvalidating.DTDGrammar;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import com.sun.org.apache.xerces.internal.impl.msg.XMLMessageFormatter;
import com.sun.org.apache.xerces.internal.util.XMLChar;
import com.sun.org.apache.xerces.internal.util.XMLStringBuffer;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
import com.sun.org.apache.xerces.internal.util.XMLAttributesImpl;
import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;
import com.sun.xml.internal.stream.dtd.DTDGrammarUtil;
/** This class implements javax.xml.stream.XMLStreamReader. It makes use of XML*Scanner classes to
* derive most of its functionality. If desired, Application can reuse this instance by calling
* reset() and setInputSource().
*
* @author Neeraj Bajaj Sun Microsystems,Inc.
* @author K.Venugopal Sun Microsystems,Inc.
* @author Sunitha Reddy Sun Microsystems,Inc.
*/
public class XMLStreamReaderImpl implements javax.xml.stream.XMLStreamReader {
/** Property identifier: entity manager. */
protected static final String ENTITY_MANAGER =
Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_MANAGER_PROPERTY;
/** Property identifier: Error Reporter. */
protected static final String ERROR_REPORTER =
Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;
/** Property identifier: Symbol table. */
protected static final String SYMBOL_TABLE =
Constants.XERCES_PROPERTY_PREFIX + Constants.SYMBOL_TABLE_PROPERTY;
protected static final String READER_IN_DEFINED_STATE =
Constants.READER_IN_DEFINED_STATE;
private SymbolTable fSymbolTable = new SymbolTable();
/** Document scanner. */
protected XMLDocumentScannerImpl fScanner = new XMLNSDocumentScannerImpl();
//make Global NamespaceContextWrapper object, fScanner.getNamespaceContext() is dynamic object and ita value changes
//as per the state of the parser.
protected NamespaceContextWrapper fNamespaceContextWrapper = new NamespaceContextWrapper((NamespaceSupport)fScanner.getNamespaceContext()) ;
protected XMLEntityManager fEntityManager = new XMLEntityManager();
protected StaxErrorReporter fErrorReporter = new StaxErrorReporter();
/** Entity scanner, this alwasy works on last entity that was opened. */
protected XMLEntityScanner fEntityScanner = null;
/** Input Source */
protected XMLInputSource fInputSource = null;
/** Store properties*/
protected PropertyManager fPropertyManager = null ;
/** current event type */
private int fEventType ;
/** debug flag*/
static final boolean DEBUG = false ;
/** more to scan */
private boolean fReuse = true;
private boolean fReaderInDefinedState = true ;
private boolean fBindNamespaces = true;
private String fDTDDecl = null;
private String versionStr = null;
/**
* @param inputStream
* @param props
* @throws XMLStreamException
*/
public XMLStreamReaderImpl(InputStream inputStream, PropertyManager props) throws XMLStreamException {
init(props);
//publicId, systemid, baseSystemId, inputStream, enocding
XMLInputSource inputSource = new XMLInputSource(null,null,null,inputStream,null);
//pass the input source to document scanner impl.
setInputSource(inputSource);
}
public XMLDocumentScannerImpl getScanner(){
System.out.println("returning scanner");
return fScanner;
}
/**
* @param systemid
* @param props
* @throws XMLStreamException
*/
public XMLStreamReaderImpl(String systemid, PropertyManager props) throws XMLStreamException {
init(props);
//publicId, systemid, baseSystemId, inputStream, enocding
XMLInputSource inputSource = new XMLInputSource(null,systemid,null);
//pass the input source to document scanner impl.
setInputSource(inputSource);
}
/**
* @param inputStream
* @param encoding
* @param props
* @throws XMLStreamException
*/
public XMLStreamReaderImpl(InputStream inputStream, String encoding, PropertyManager props ) throws XMLStreamException {
init(props);
//publicId, systemid, baseSystemId, inputStream, enocding
XMLInputSource inputSource = new XMLInputSource(null,null,null, new BufferedInputStream(inputStream),encoding );
//pass the input source to document scanner impl.
setInputSource(inputSource);
}
/**
* @param reader
* @param props
* @throws XMLStreamException
*/
public XMLStreamReaderImpl(Reader reader, PropertyManager props) throws XMLStreamException {
init(props);
//publicId, systemid, baseSystemId, inputStream, enocding
//xxx: Using buffered reader
XMLInputSource inputSource = new XMLInputSource(null,null,null,new BufferedReader(reader),null);
//pass the input source to document scanner impl.
setInputSource(inputSource);
}
/**
* @param inputSource
* @param props
* @throws XMLStreamException
*/
public XMLStreamReaderImpl(XMLInputSource inputSource, PropertyManager props) throws XMLStreamException {
init(props);
//pass the input source to document scanner impl.
setInputSource(inputSource);
}
/**
* @param inputSource
* @throws XMLStreamException
*/
public void setInputSource(XMLInputSource inputSource ) throws XMLStreamException {
//once setInputSource() is called this instance is busy parsing the inputsource supplied
//this instances is free for reuse if parser has reached END_DOCUMENT state or application has
//called close()
fReuse = false;
try{
fScanner.setInputSource(inputSource) ;
//XMLStreamReader should be in defined state
if(fReaderInDefinedState){
fEventType = fScanner.next();
if (versionStr == null)
versionStr = getVersion();
if (fEventType == XMLStreamConstants.START_DOCUMENT && versionStr != null && versionStr.equals("1.1")){
switchToXML11Scanner();
}
}
}catch(java.io.IOException ex){
throw new XMLStreamException(ex);
} catch(XNIException ex){ //Issue 56 XNIException not caught
throw new XMLStreamException(ex.getMessage(), getLocation(), ex.getException());
}
}//setInputSource
void init(PropertyManager propertyManager) throws XMLStreamException {
fPropertyManager = propertyManager;
//set Stax internal properties -- Note that these instances are being created in XMLReaderImpl.
//1.SymbolTable
//2.XMLMessageFormatter
//3.XMLEntityManager
//4. call reset()
//1.
propertyManager.setProperty(SYMBOL_TABLE, fSymbolTable ) ;
//2.
propertyManager.setProperty(ERROR_REPORTER, fErrorReporter ) ;
//3.
propertyManager.setProperty(ENTITY_MANAGER, fEntityManager);
//4.
reset();
}
/** This function tells if this instances is available for reuse.
* One must call reset() and setInputSource() to be able to reuse
* this instance.
*/
public boolean canReuse(){
if(DEBUG){
System.out.println("fReuse = " + fReuse);
System.out.println("fEventType = " + getEventTypeString(fEventType) );
}
//when parsing begins, fReuse is set to false
//fReuse is set to 'true' when application calls close()
return fReuse;
}
/**
* Resets this instance so that this instance is ready for reuse.
*/
public void reset(){
fReuse = true;
fEventType = 0 ;
//reset entity manager
fEntityManager.reset(fPropertyManager);
//reset the scanner
fScanner.reset(fPropertyManager);
//REVISIT:this is too ugly -- we are getting XMLEntityManager and XMLEntityReader from
//property manager, it should be only XMLEntityManager
fDTDDecl = null;
fEntityScanner = (XMLEntityScanner)fEntityManager.getEntityScanner() ;
//default value for this property is true. However, this should be false when using XMLEventReader... Ugh..
//because XMLEventReader should not have defined state.
fReaderInDefinedState = ((Boolean)fPropertyManager.getProperty(READER_IN_DEFINED_STATE)).booleanValue();
fBindNamespaces = ((Boolean)fPropertyManager.getProperty(XMLInputFactory.IS_NAMESPACE_AWARE)).booleanValue();
versionStr = null;
}
/** Frees any resources associated with this Reader. This method does not close the underlying input source.
* @throws XMLStreamException if there are errors freeing associated resources
*/
public void close() throws XMLStreamException {
//xxx: Check what this function is intended to do.
//reset();
fReuse = true ;
}
/** Returns the character encoding declared on the xml declaration Returns null if none was declared
* @return the encoding declared in the document or null
*/
public String getCharacterEncodingScheme() {
return fScanner.getCharacterEncodingScheme();
}
/**
* @return
*/
public int getColumnNumber() {
return fEntityScanner.getColumnNumber();
}//getColumnNumber
/** Return input encoding if known or null if unknown.
* @return the encoding of this instance or null
*/
public String getEncoding() {
return fEntityScanner.getEncoding();
}//getEncoding
/** Returns the current value of the parse event as a string, this returns the string value of a CHARACTERS event, returns the value of a COMMENT, the replacement value for an ENTITY_REFERENCE, the string value of a CDATA section, the string value for a SPACE event, or the String value of the internal subset of the DTD. If an ENTITY_REFERENCE has been resolved, any character data will be reported as CHARACTERS events.
* @return the current text or null
*/
public int getEventType() {
return fEventType ;
}//getEventType
/**
* @return
*/
public int getLineNumber() {
return fEntityScanner.getLineNumber() ;
}//getLineNumber
public String getLocalName() {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT){
//xxx check whats the value of fCurrentElement
return fScanner.getElementQName().localpart ;
}
else if(fEventType == XMLEvent.ENTITY_REFERENCE){
return fScanner.getEntityName();
}
throw new IllegalStateException("Method getLocalName() cannot be called for " +
getEventTypeString(fEventType) + " event.");
}//getLocalName()
/**
* @return
*/
public String getNamespaceURI() {
//doesn't take care of Attribute as separte event
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT){
return fScanner.getElementQName().uri ;
}
return null ;
}//getNamespaceURI
/** Get the data section of a processing instruction
* @return the data or null
*/
public String getPIData() {
if( fEventType == XMLEvent.PROCESSING_INSTRUCTION){
return fScanner.getPIData().toString();
}
else throw new java.lang.IllegalStateException("Current state of the parser is " + getEventTypeString(fEventType) +
" But Expected state is " + XMLEvent.PROCESSING_INSTRUCTION ) ;
}//getPIData
/** Get the target of a processing instruction
* @return the target or null
*/
public String getPITarget() {
if( fEventType == XMLEvent.PROCESSING_INSTRUCTION){
return fScanner.getPITarget();
}
else throw new java.lang.IllegalStateException("Current state of the parser is " + getEventTypeString(fEventType) +
" But Expected state is " + XMLEvent.PROCESSING_INSTRUCTION ) ;
}//getPITarget
/**
* @return the prefix of the current event, or null if the event does
* not have a prefix. For START_ELEMENT and END_ELEMENT, return
* XMLConstants.DEFAULT_NS_PREFIX when no prefix is available.
*/
public String getPrefix() {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT){
String prefix = fScanner.getElementQName().prefix;
return prefix == null ? XMLConstants.DEFAULT_NS_PREFIX : prefix;
}
return null ;
}//getPrefix()
/**
* @return
*/
public char[] getTextCharacters() {
if( fEventType == XMLEvent.CHARACTERS || fEventType == XMLEvent.COMMENT
|| fEventType == XMLEvent.CDATA || fEventType == XMLEvent.SPACE){
return fScanner.getCharacterData().ch;
} else{
throw new IllegalStateException("Current state = " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.CHARACTERS) + " , "
+ getEventTypeString(XMLEvent.COMMENT) + " , " + getEventTypeString(XMLEvent.CDATA)
+ " , " + getEventTypeString(XMLEvent.SPACE) +" valid for getTextCharacters() " ) ;
}
}
/**
* @return
*/
public int getTextLength() {
if( fEventType == XMLEvent.CHARACTERS || fEventType == XMLEvent.COMMENT
|| fEventType == XMLEvent.CDATA || fEventType == XMLEvent.SPACE){
return fScanner.getCharacterData().length;
} else{
throw new IllegalStateException("Current state = " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.CHARACTERS) + " , "
+ getEventTypeString(XMLEvent.COMMENT) + " , " + getEventTypeString(XMLEvent.CDATA)
+ " , " + getEventTypeString(XMLEvent.SPACE) +" valid for getTextLength() " ) ;
}
}
/**
* @return
*/
public int getTextStart() {
if( fEventType == XMLEvent.CHARACTERS || fEventType == XMLEvent.COMMENT || fEventType == XMLEvent.CDATA || fEventType == XMLEvent.SPACE){
return fScanner.getCharacterData().offset;
} else{
throw new IllegalStateException("Current state = " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.CHARACTERS) + " , "
+ getEventTypeString(XMLEvent.COMMENT) + " , " + getEventTypeString(XMLEvent.CDATA)
+ " , " + getEventTypeString(XMLEvent.SPACE) +" valid for getTextStart() " ) ;
}
}
/**
* @return
*/
public String getValue() {
if(fEventType == XMLEvent.PROCESSING_INSTRUCTION){
return fScanner.getPIData().toString();
} else if(fEventType == XMLEvent.COMMENT){
return fScanner.getComment();
} else if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT){
return fScanner.getElementQName().localpart ;
} else if(fEventType == XMLEvent.CHARACTERS){
return fScanner.getCharacterData().toString();
}
return null;
}//getValue()
/** Get the XML language version of the current document being parsed */
public String getVersion() {
//apply SAP's patch: the default version in the scanner was set to 1.0 because of DOM and SAX
//so this patch is a workaround of the difference between StAX and DOM
// SAPJVM: Return null if the XML version has not been declared (as specified in the JavaDoc).
String version = fEntityScanner.getXMLVersion();
return "1.0".equals(version) && !fEntityScanner.xmlVersionSetExplicitly ? null : version;
}
/**
* @return
*/
public boolean hasAttributes() {
return fScanner.getAttributeIterator().getLength() > 0 ? true : false ;
}
/** this Funtion returns true if the current event has name */
public boolean hasName() {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT) {
return true;
} else {
return false;
}
}//hasName()
/**
* @throws XMLStreamException
* @return
*/
public boolean hasNext() throws XMLStreamException {
//the scanner returns -1 when it detects a broken stream
if (fEventType == -1) return false;
//we can check in scanners if the scanner state is not set to
//terminating, we still have more events.
return fEventType != XMLEvent.END_DOCUMENT;
}
/**
* @return
*/
public boolean hasValue() {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT
|| fEventType == XMLEvent.ENTITY_REFERENCE || fEventType == XMLEvent.PROCESSING_INSTRUCTION
|| fEventType == XMLEvent.COMMENT || fEventType == XMLEvent.CHARACTERS) {
return true;
} else {
return false;
}
}
/**
* @return
*/
public boolean isEndElement() {
return fEventType == XMLEvent.END_ELEMENT;
}
/**
* @return
*/
public boolean isStandalone() {
return fScanner.isStandAlone();
}
/**
* @return
*/
public boolean isStartElement() {
return fEventType == XMLEvent.START_ELEMENT;
}
/**
* Returns true if the cursor points to a character data event that consists of all whitespace
* Application calling this method needs to cache the value and avoid calling this method again
* for the same event.
* @return
*/
public boolean isWhiteSpace() {
if(isCharacters() || (fEventType == XMLStreamConstants.CDATA)){
char [] ch = this.getTextCharacters();
final int start = this.getTextStart();
final int end = start + this.getTextLength();
for (int i = start; i < end; i++){
if(!XMLChar.isSpace(ch[i])){
return false;
}
}
return true;
}
return false;
}
/**
* @throws XMLStreamException
* @return
*/
public int next() throws XMLStreamException {
if( !hasNext() ) {
if (fEventType != -1) {
throw new java.util.NoSuchElementException( "END_DOCUMENT reached: no more elements on the stream." );
} else {
throw new XMLStreamException( "Error processing input source. The input stream is not complete." );
}
}
try {
fEventType = fScanner.next();
if (versionStr == null) {
versionStr = getVersion();
}
if (fEventType == XMLStreamConstants.START_DOCUMENT
&& versionStr != null
&& versionStr.equals("1.1")) {
switchToXML11Scanner();
}
return fEventType;
} catch (IOException ex) {
// if this error occured trying to resolve the external DTD subset
// and IS_VALIDATING == false, then this is not an XML error
if (fScanner.fScannerState == fScanner.SCANNER_STATE_DTD_EXTERNAL) {
Boolean isValidating = (Boolean) fPropertyManager.getProperty(
XMLInputFactory.IS_VALIDATING);
if (isValidating != null
&& !isValidating.booleanValue()) {
// ignore the error, set scanner to known state
fEventType = XMLEvent.DTD;
fScanner.setScannerState(fScanner.SCANNER_STATE_PROLOG);
fScanner.setDriver(fScanner.fPrologDriver);
if (fDTDDecl == null
|| fDTDDecl.length() == 0) {
fDTDDecl = "<!-- "
+ "Exception scanning External DTD Subset. "
+ "True contents of DTD cannot be determined. "
+ "Processing will continue as XMLInputFactory.IS_VALIDATING == false."
+ " -->";
}
return XMLEvent.DTD;
}
}
// else real error
throw new XMLStreamException(ex.getMessage(), getLocation(), ex);
} catch (XNIException ex) {
throw new XMLStreamException(
ex.getMessage(),
getLocation(),
ex.getException());
}
} //next()
private void switchToXML11Scanner() throws IOException{
int oldEntityDepth = fScanner.fEntityDepth;
com.sun.org.apache.xerces.internal.xni.NamespaceContext oldNamespaceContext = fScanner.fNamespaceContext;
fScanner = new XML11NSDocumentScannerImpl();
//get the new scanner state to old scanner's previous state
fScanner.reset(fPropertyManager);
fScanner.setPropertyManager(fPropertyManager);
fEntityScanner = (XMLEntityScanner)fEntityManager.getEntityScanner() ;
fEntityManager.fCurrentEntity.mayReadChunks = true;
fScanner.setScannerState(XMLEvent.START_DOCUMENT);
fScanner.fEntityDepth = oldEntityDepth;
fScanner.fNamespaceContext = oldNamespaceContext;
fEventType = fScanner.next();
}
final static String getEventTypeString(int eventType) {
switch (eventType){
case XMLEvent.START_ELEMENT:
return "START_ELEMENT";
case XMLEvent.END_ELEMENT:
return "END_ELEMENT";
case XMLEvent.PROCESSING_INSTRUCTION:
return "PROCESSING_INSTRUCTION";
case XMLEvent.CHARACTERS:
return "CHARACTERS";
case XMLEvent.COMMENT:
return "COMMENT";
case XMLEvent.START_DOCUMENT:
return "START_DOCUMENT";
case XMLEvent.END_DOCUMENT:
return "END_DOCUMENT";
case XMLEvent.ENTITY_REFERENCE:
return "ENTITY_REFERENCE";
case XMLEvent.ATTRIBUTE:
return "ATTRIBUTE";
case XMLEvent.DTD:
return "DTD";
case XMLEvent.CDATA:
return "CDATA";
case XMLEvent.SPACE:
return "SPACE";
}
return "UNKNOWN_EVENT_TYPE, " + String.valueOf(eventType);
}
/** Returns the count of attributes on this START_ELEMENT,
* this method is only valid on a START_ELEMENT or ATTRIBUTE. This
* count excludes namespace definitions. Attribute indices are
* zero-based.
* @return returns the number of attributes
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public int getAttributeCount() {
//xxx: recognize SAX properties namespace, namespace-prefix to get XML Namespace declarations
//does length includes namespace declarations ?
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getLength() ;
} else{
throw new java.lang.IllegalStateException( "Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeCount()") ;
}
}//getAttributeCount
/** Returns the localName of the attribute at the provided
* index
* @param index the position of the attribute
* @return the localName of the attribute
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public QName getAttributeName(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return convertXNIQNametoJavaxQName(fScanner.getAttributeIterator().getQualifiedName(index)) ;
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeName()") ;
}
}//getAttributeName
/**
* @param index
* @return
*/
public String getAttributeLocalName(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getLocalName(index) ;
} else{
throw new java.lang.IllegalStateException() ;
}
}//getAttributeName
/** Returns the namespace of the attribute at the provided
* index
* @param index the position of the attribute
* @return the namespace URI (can be null)
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public String getAttributeNamespace(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getURI(index);
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeNamespace()") ;
}
}//getAttributeNamespace
/** Returns the prefix of this attribute at the
* provided index
* @param index the position of the attribute
* @return the prefix of the attribute
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public String getAttributePrefix(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getPrefix(index);
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributePrefix()") ;
}
}//getAttributePrefix
/** Returns the qname of the attribute at the provided index
*
* @param index the position of the attribute
* @return the QName of the attribute
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public javax.xml.namespace.QName getAttributeQName(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
// create new object at runtime..
String localName = fScanner.getAttributeIterator().getLocalName(index) ;
String uri = fScanner.getAttributeIterator().getURI(index) ;
return new javax.xml.namespace.QName(uri, localName) ;
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeQName()") ;
}
}//getAttributeQName
/** Returns the XML type of the attribute at the provided
* index
* @param index the position of the attribute
* @return the XML type of the attribute
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public String getAttributeType(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getType(index) ;
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeType()") ;
}
}//getAttributeType
/** Returns the value of the attribute at the
* index
* @param index the position of the attribute
* @return the attribute value
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public String getAttributeValue(int index) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
return fScanner.getAttributeIterator().getValue(index) ;
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeValue()") ;
}
}//getAttributeValue
/**
* @param namespaceURI
* @param localName
* @return
*/
public String getAttributeValue(String namespaceURI, String localName) {
//State should be either START_ELEMENT or ATTRIBUTE
if( fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.ATTRIBUTE) {
XMLAttributesImpl attributes = fScanner.getAttributeIterator();
if (namespaceURI == null) { //sjsxp issue 70
return attributes.getValue(attributes.getIndexByLocalName(localName)) ;
} else {
return fScanner.getAttributeIterator().getValue(
namespaceURI.length() == 0 ? null : namespaceURI, localName) ;
}
} else{
throw new java.lang.IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for getAttributeValue()") ;
}
}
/** Reads the content of a text-only element. Precondition:
* the current event is START_ELEMENT. Postcondition:
* The current event is the corresponding END_ELEMENT.
* @throws XMLStreamException if the current event is not a START_ELEMENT or if
* a non text element is encountered
*/
public String getElementText() throws XMLStreamException {
if(getEventType() != XMLStreamConstants.START_ELEMENT) {
throw new XMLStreamException(
"parser must be on START_ELEMENT to read next text", getLocation());
}
int eventType = next();
StringBuffer content = new StringBuffer();
while(eventType != XMLStreamConstants.END_ELEMENT ) {
if(eventType == XMLStreamConstants.CHARACTERS
|| eventType == XMLStreamConstants.CDATA
|| eventType == XMLStreamConstants.SPACE
|| eventType == XMLStreamConstants.ENTITY_REFERENCE) {
content.append(getText());
} else if(eventType == XMLStreamConstants.PROCESSING_INSTRUCTION
|| eventType == XMLStreamConstants.COMMENT) {
// skipping
} else if(eventType == XMLStreamConstants.END_DOCUMENT) {
throw new XMLStreamException("unexpected end of document when reading element text content");
} else if(eventType == XMLStreamConstants.START_ELEMENT) {
throw new XMLStreamException(
"elementGetText() function expects text only elment but START_ELEMENT was encountered.", getLocation());
} else {
throw new XMLStreamException(
"Unexpected event type "+ eventType, getLocation());
}
eventType = next();
}
return content.toString();
}
/** Return the current location of the processor.
* If the Location is unknown the processor should return
* an implementation of Location that returns -1 for the
* location and null for the publicId and systemId.
* The location information is only valid until next() is
* called.
*/
public Location getLocation() {
return new Location() {
String _systemId = fEntityScanner.getExpandedSystemId();
String _publicId = fEntityScanner.getPublicId();
int _offset = fEntityScanner.getCharacterOffset();
int _columnNumber = fEntityScanner.getColumnNumber();
int _lineNumber = fEntityScanner.getLineNumber();
public String getLocationURI(){
return _systemId;
}
public int getCharacterOffset(){
return _offset;
}
public int getColumnNumber() {
return _columnNumber;
}
public int getLineNumber(){
return _lineNumber;
}
public String getPublicId(){
return _publicId;
}
public String getSystemId(){
return _systemId;
}
public String toString(){
StringBuffer sbuffer = new StringBuffer() ;
sbuffer.append("Line number = " + getLineNumber());
sbuffer.append("\n") ;
sbuffer.append("Column number = " + getColumnNumber());
sbuffer.append("\n") ;
sbuffer.append("System Id = " + getSystemId());
sbuffer.append("\n") ;
sbuffer.append("Public Id = " + getPublicId());
sbuffer.append("\n") ;
sbuffer.append("Location Uri= " + getLocationURI());
sbuffer.append("\n") ;
sbuffer.append("CharacterOffset = " + getCharacterOffset());
sbuffer.append("\n") ;
return sbuffer.toString();
}
} ;
}
/** Returns a QName for the current START_ELEMENT or END_ELEMENT event
* @return the QName for the current START_ELEMENT or END_ELEMENT event
*/
public javax.xml.namespace.QName getName() {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT)
return convertXNIQNametoJavaxQName(fScanner.getElementQName());
else
throw new java.lang.IllegalStateException("Illegal to call getName() "+
"when event type is "+ getEventTypeString(fEventType) + "."
+ " Valid states are " + getEventTypeString(XMLEvent.START_ELEMENT) + ", "
+ getEventTypeString(XMLEvent.END_ELEMENT));
}
/** Returns a read only namespace context for the current
* position. The context is transient and only valid until
* a call to next() changes the state of the reader.
* @return return a namespace context
*/
public NamespaceContext getNamespaceContext() {
return fNamespaceContextWrapper ;
}
/** Returns the count of namespaces declared on this START_ELEMENT or END_ELEMENT,
* this method is only valid on a START_ELEMENT, END_ELEMENT or NAMESPACE. On
* an END_ELEMENT the count is of the namespaces that are about to go
* out of scope. This is the equivalent of the information reported
* by SAX callback for an end element event.
* @return returns the number of namespace declarations on this specific element
* @throws IllegalStateException if this is not a START_ELEMENT, END_ELEMENT or NAMESPACE
*/
public int getNamespaceCount() {
//namespaceContext is dynamic object.
//REVISIT: check if it specifies all conditions mentioned in the javadoc
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT || fEventType == XMLEvent.NAMESPACE){
return fScanner.getNamespaceContext().getDeclaredPrefixCount() ;
} else{
throw new IllegalStateException("Current event state is " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.START_ELEMENT)
+ ", " + getEventTypeString(XMLEvent.END_ELEMENT) + ", "
+ getEventTypeString(XMLEvent.NAMESPACE)
+ " valid for getNamespaceCount()." );
}
}
/** Returns the prefix for the namespace declared at the
* index. Returns null if this is the default namespace
* declaration
*
* @param index the position of the namespace declaration
* @return returns the namespace prefix
* @throws IllegalStateException if this is not a START_ELEMENT, END_ELEMENT or NAMESPACE
*/
public String getNamespacePrefix(int index) {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT || fEventType == XMLEvent.NAMESPACE){
//namespaceContext is dynamic object.
String prefix = fScanner.getNamespaceContext().getDeclaredPrefixAt(index) ;
return prefix.equals("") ? null : prefix ;
}
else{
throw new IllegalStateException("Current state " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.START_ELEMENT)
+ ", " + getEventTypeString(XMLEvent.END_ELEMENT) + ", "
+ getEventTypeString(XMLEvent.NAMESPACE)
+ " valid for getNamespacePrefix()." );
}
}
/** Returns the uri for the namespace declared at the
* index.
*
* @param index the position of the namespace declaration
* @return returns the namespace uri
* @throws IllegalStateException if this is not a START_ELEMENT, END_ELEMENT or NAMESPACE
*/
public String getNamespaceURI(int index) {
if(fEventType == XMLEvent.START_ELEMENT || fEventType == XMLEvent.END_ELEMENT || fEventType == XMLEvent.NAMESPACE){
//namespaceContext is dynamic object.
return fScanner.getNamespaceContext().getURI(fScanner.getNamespaceContext().getDeclaredPrefixAt(index));
}
else{
throw new IllegalStateException("Current state " + getEventTypeString(fEventType)
+ " is not among the states " + getEventTypeString(XMLEvent.START_ELEMENT)
+ ", " + getEventTypeString(XMLEvent.END_ELEMENT) + ", "
+ getEventTypeString(XMLEvent.NAMESPACE)
+ " valid for getNamespaceURI()." );
}
}
/** Get the value of a feature/property from the underlying implementation
* @param name The name of the property, may not be null
* @return The value of the property
* @throws IllegalArgumentException if name is null
*/
public Object getProperty(java.lang.String name) throws java.lang.IllegalArgumentException {
if(name == null) throw new java.lang.IllegalArgumentException() ;
if (fPropertyManager != null ){
if(name.equals(fPropertyManager.STAX_NOTATIONS)){
return getNotationDecls();
}else if(name.equals(fPropertyManager.STAX_ENTITIES)){
return getEntityDecls();
}else
return fPropertyManager.getProperty(name);
}
return null;
}
/** Returns the current value of the parse event as a string,
* this returns the string value of a CHARACTERS event,
* returns the value of a COMMENT, the replacement value
* for an ENTITY_REFERENCE,
* or the String value of the DTD
* @return the current text or null
* @throws java.lang.IllegalStateException if this state is not
* a valid text state.
*/
public String getText() {
if( fEventType == XMLEvent.CHARACTERS || fEventType == XMLEvent.COMMENT
|| fEventType == XMLEvent.CDATA || fEventType == XMLEvent.SPACE){
//this requires creation of new string
//fEventType == XMLEvent.ENTITY_REFERENCE
return fScanner.getCharacterData().toString() ;
} else if(fEventType == XMLEvent.ENTITY_REFERENCE){
String name = fScanner.getEntityName();
if(name != null){
if(fScanner.foundBuiltInRefs)
return fScanner.getCharacterData().toString();
XMLEntityStorage entityStore = fEntityManager.getEntityStore();
Entity en = entityStore.getEntity(name);
if(en == null)
return null;
if(en.isExternal())
return ((Entity.ExternalEntity)en).entityLocation.getExpandedSystemId();
else
return ((Entity.InternalEntity)en).text;
}else
return null;
}
else if(fEventType == XMLEvent.DTD){
if(fDTDDecl != null){
return fDTDDecl;
}
XMLStringBuffer tmpBuffer = fScanner.getDTDDecl();
fDTDDecl = tmpBuffer.toString();
return fDTDDecl;
} else{
throw new IllegalStateException("Current state " + getEventTypeString(fEventType)
+ " is not among the states" + getEventTypeString(XMLEvent.CHARACTERS) + ", "
+ getEventTypeString(XMLEvent.COMMENT) + ", "
+ getEventTypeString(XMLEvent.CDATA) + ", "
+ getEventTypeString(XMLEvent.SPACE) + ", "
+ getEventTypeString(XMLEvent.ENTITY_REFERENCE) + ", "
+ getEventTypeString(XMLEvent.DTD) + " valid for getText() " ) ;
}
}//getText
/** Test if the current event is of the given type and if the namespace and name match the current namespace and name of the current event.
* If the namespaceURI is null it is not checked for equality, if the localName is null it is not checked for equality.
* @param type the event type
* @param namespaceURI the uri of the event, may be null
* @param localName the localName of the event, may be null
* @throws XMLStreamException if the required values are not matched.
*/
public void require(int type, String namespaceURI, String localName) throws XMLStreamException {
if( type != fEventType)
throw new XMLStreamException("Event type " + getEventTypeString(type) + " specified did " +
"not match with current parser event " + getEventTypeString(fEventType));
if( namespaceURI != null && !namespaceURI.equals(getNamespaceURI()) )
throw new XMLStreamException("Namespace URI " + namespaceURI +" specified did not match " +
"with current namespace URI");
if(localName != null && !localName.equals(getLocalName()))
throw new XMLStreamException("LocalName " + localName +" specified did not match with " +
"current local name");
return;
}
/** Gets the the text associated with a CHARACTERS, SPACE or CDATA event.
* Text starting a "sourceStart" is copied into "destination" starting at "targetStart".
* Up to "length" characters are copied. The number of characters actually copied is returned.
*
* The "sourceStart" argument must be greater or equal to 0 and less than or equal to
* the number of characters associated with the event. Usually, one requests text starting at a "sourceStart" of 0.
* If the number of characters actually copied is less than the "length", then there is no more text.
* Otherwise, subsequent calls need to be made until all text has been retrieved. For example:
*
* <code>
* int length = 1024;
* char[] myBuffer = new char[ length ];
*
* for ( int sourceStart = 0 ; ; sourceStart += length )
* {
* int nCopied = stream.getTextCharacters( sourceStart, myBuffer, 0, length );
*
* if (nCopied < length)
* break;
* }
* </code>
* XMLStreamException may be thrown if there are any XML errors in the underlying source.
* The "targetStart" argument must be greater than or equal to 0 and less than the length of "target",
* Length must be greater than 0 and "targetStart + length" must be less than or equal to length of "target".
*
* @param sourceStart the index of the first character in the source array to copy
* @param target the destination array
* @param targetStart the start offset in the target array
* @param length the number of characters to copy
* @return the number of characters actually copied
* @throws XMLStreamException if the underlying XML source is not well-formed
* @throws IndexOutOfBoundsException if targetStart < 0 or > than the length of target
* @throws IndexOutOfBoundwhile(isCharacters()) ;sException if length < 0 or targetStart + length > length of target
* @throws UnsupportedOperationException if this method is not supported
* @throws NullPointerException is if target is null
*/
public int getTextCharacters(int sourceStart, char[] target, int targetStart, int length) throws XMLStreamException {
if(target == null){
throw new NullPointerException("target char array can't be null") ;
}
if(targetStart < 0 || length < 0 || sourceStart < 0 || targetStart >= target.length ||
(targetStart + length ) > target.length) {
throw new IndexOutOfBoundsException();
}
//getTextStart() + sourceStart should not be greater than the lenght of number of characters
//present
int copiedLength = 0;
//int presentDataLen = getTextLength() - (getTextStart()+sourceStart);
int available = getTextLength() - sourceStart;
if(available < 0){
throw new IndexOutOfBoundsException("sourceStart is greater than" +
"number of characters associated with this event");
}
if(available < length){
copiedLength = available;
} else{
copiedLength = length;
}
System.arraycopy(getTextCharacters(), getTextStart() + sourceStart , target, targetStart, copiedLength);
return copiedLength;
}
/** Return true if the current event has text, false otherwise
* The following events have text:
* CHARACTERS,DTD ,ENTITY_REFERENCE, COMMENT
*/
public boolean hasText() {
if(DEBUG) pr("XMLReaderImpl#EVENT TYPE = " + fEventType ) ;
if( fEventType == XMLEvent.CHARACTERS || fEventType == XMLEvent.COMMENT || fEventType == XMLEvent.CDATA) {
return fScanner.getCharacterData().length > 0 ? true : false;
} else if(fEventType == XMLEvent.ENTITY_REFERENCE) {
String name = fScanner.getEntityName();
if(name != null){
if(fScanner.foundBuiltInRefs)
return true;
XMLEntityStorage entityStore = fEntityManager.getEntityStore();
Entity en = entityStore.getEntity(name);
if(en == null)
return false;
if(en.isExternal()){
return ((Entity.ExternalEntity)en).entityLocation.getExpandedSystemId() != null ? true : false;
} else{
return ((Entity.InternalEntity)en).text != null ? true : false ;
}
}else
return false;
} else {
if(fEventType == XMLEvent.DTD)
return fScanner.fSeenDoctypeDecl;
}
return false;
}
/** Returns a boolean which indicates if this
* attribute was created by default
* @param index the position of the attribute
* @return true if this is a default attribute
* @throws IllegalStateException if this is not a START_ELEMENT or ATTRIBUTE
*/
public boolean isAttributeSpecified(int index) {
//check that current state should be either START_ELEMENT or ATTRIBUTE
if( (fEventType == XMLEvent.START_ELEMENT) || (fEventType == XMLEvent.ATTRIBUTE)){
return fScanner.getAttributeIterator().isSpecified(index) ;
} else{
throw new IllegalStateException("Current state is not among the states "
+ getEventTypeString(XMLEvent.START_ELEMENT) + " , "
+ getEventTypeString(XMLEvent.ATTRIBUTE)
+ "valid for isAttributeSpecified()") ;
}
}
/** Returns true if the cursor points to a character data event
* @return true if the cursor points to character data, false otherwise
*/
public boolean isCharacters() {
return fEventType == XMLEvent.CHARACTERS ;
}
/** Skips any insignificant events (COMMENT and PROCESSING_INSTRUCTION)
* until a START_ELEMENT or
* END_ELEMENT is reached. If other than space characters are
* encountered, an exception is thrown. This method should
* be used when processing element-only content because
* the parser is not able to recognize ignorable whitespace if
* then DTD is missing or not interpreted.
* @return the event type of the element read
* @throws XMLStreamException if the current event is not white space
*/
public int nextTag() throws XMLStreamException {
int eventType = next();
while((eventType == XMLStreamConstants.CHARACTERS && isWhiteSpace()) // skip whitespace
|| (eventType == XMLStreamConstants.CDATA && isWhiteSpace())
// skip whitespace
|| eventType == XMLStreamConstants.SPACE
|| eventType == XMLStreamConstants.PROCESSING_INSTRUCTION
|| eventType == XMLStreamConstants.COMMENT
) {
eventType = next();
}
if (eventType != XMLStreamConstants.START_ELEMENT && eventType != XMLStreamConstants.END_ELEMENT) {
throw new XMLStreamException(
"found: " + getEventTypeString(eventType)
+ ", expected " + getEventTypeString(XMLStreamConstants.START_ELEMENT)
+ " or " + getEventTypeString(XMLStreamConstants.END_ELEMENT),
getLocation());
}
return eventType;
}
/** Checks if standalone was set in the document
* @return true if standalone was set in the document, or false otherwise
*/
public boolean standaloneSet() {
//xxx: it requires if the standalone was set in the document ? This is different that if the document
// is standalone
return fScanner.standaloneSet() ;
}
/**
* @param qname
* @return
*/
public javax.xml.namespace.QName convertXNIQNametoJavaxQName(com.sun.org.apache.xerces.internal.xni.QName qname){
if (qname == null) return null;
//xxx: prefix definition ?
if(qname.prefix == null){
return new javax.xml.namespace.QName(qname.uri, qname.localpart) ;
} else{
return new javax.xml.namespace.QName(qname.uri, qname.localpart, qname.prefix) ;
}
}
/** Return the uri for the given prefix.
* The uri returned depends on the current state of the processor.
*
* <p>NOTE:The 'xml' prefix is bound as defined in
* <a href="http://www.w3.org/TR/REC-xml-names/#ns-using">Namespaces in XML
* specification to "http://www.w3.org/XML/1998/namespace".
*
* <p>NOTE: The 'xmlns' prefix must be resolved to following namespace
* <a href="http://www.w3.org/2000/xmlns/">http://www.w3.org/2000/xmlns/
* @return the uri bound to the given prefix or null if it is not bound
* @param prefix The prefix to lookup, may not be null
* @throws IllegalStateException - if the prefix is null
*/
public String getNamespaceURI(String prefix) {
if(prefix == null) throw new java.lang.IllegalArgumentException("prefix cannot be null.") ;
//first add the string to symbol table.. since internally identity comparisons are done.
return fScanner.getNamespaceContext().getURI(fSymbolTable.addSymbol(prefix)) ;
}
//xxx: this function is not being used.
protected void setPropertyManager(PropertyManager propertyManager){
fPropertyManager = propertyManager ;
//REVISIT: we were supplying hashmap ealier
fScanner.setProperty("stax-properties",propertyManager);
fScanner.setPropertyManager(propertyManager) ;
}
/**
* @return returns the reference to property manager.
*/
protected PropertyManager getPropertyManager(){
return fPropertyManager ;
}
static void pr(String str) {
System.out.println(str) ;
}
protected List getEntityDecls(){
if(fEventType == XMLStreamConstants.DTD){
XMLEntityStorage entityStore = fEntityManager.getEntityStore();
ArrayList list = null;
if(entityStore.hasEntities()){
EntityDeclarationImpl decl = null;
list = new ArrayList(entityStore.getEntitySize());
Enumeration enu = entityStore.getEntityKeys();
while(enu.hasMoreElements()){
String key = (String)enu.nextElement();
Entity en = (Entity)entityStore.getEntity(key);
decl = new EntityDeclarationImpl();
decl.setEntityName(key);
if(en.isExternal()){
decl.setXMLResourceIdentifier(((Entity.ExternalEntity)en).entityLocation);
decl.setNotationName(((Entity.ExternalEntity)en).notation);
}
else
decl.setEntityReplacementText(((Entity.InternalEntity)en).text);
list.add(decl);
}
}
return list;
}
return null;
}
protected List getNotationDecls(){
if(fEventType == XMLStreamConstants.DTD){
if(fScanner.fDTDScanner == null) return null;
DTDGrammar grammar = ((XMLDTDScannerImpl)(fScanner.fDTDScanner)).getGrammar();
if(grammar == null) return null;
List notations = grammar.getNotationDecls();
Iterator it = notations.iterator();
ArrayList list = new ArrayList();
while(it.hasNext()){
XMLNotationDecl ni = (XMLNotationDecl)it.next();
if(ni!= null){
list.add(new NotationDeclarationImpl(ni));
}
}
return list;
}
return null;
}
}//XMLReaderImpl
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