Probem with SAX parser

Hi to averybody!
I'm trying to parse a xml file using SAX parser but I found a problem.
When the method
public void characters(char[] ch, int start, int length)
I try to print the content in this way:
for (int i = start; i <= length; i++)
System.out.print(ch);
but nothing is printed except except in 2 cases.
the file parsed start like this:
<BatchMaint xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.ncr.com/bosphoenix/WSMaintenance_5.0.xsd">
<Id>1000950</Id>
<DateTime>2009-02-11T11:37:09</DateTime>
<FromPC>TD185008-1J7</FromPC>
<FromAppl>BatchToPosWS.dll</FromAppl>
<FromVersion>001.000.000.000</FromVersion>
the method print only "1000950" and "2009-02-11T11:37:09".
Has somebody any idea how fix the problem??

From the API documentation for the characters() method:
"The Parser will call this method to report each chunk of character data. SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks; however, all of the characters in any single event must come from the same external entity so that the Locator provides useful information."

Similar Messages

Problem with sax parser

Hello..
I have the following problem. When I parse an xml document with blank spaces and numbers with decimals, its sometimes comes out as one string and sometimes as two, for example "First A" sometimes comes out as "First" and "A" and sometimes as "First A", which is how its stored in the xml file. Same with numbers like 19.20. Im enclosing a little of my code..
public void characters(char buf[], int offset, int len)
throws SAXException
if (textBuffer != null) {
SaveString = ""+textBuffer;
if(i>-1)
numbers = SaveString;
Whats wrong and how do I fix it.
Best Regards Dan
PS I have more code, in data and out data if needed.Ds

Hello,
I do not know if this is your problem, yet please find hereafter an excerpt of the SAX API:
public void characters(char[] ch,
                       int start,
                       int length)
                throws SAXException
... SAX parsers may return all contiguous character data in a single chunk, or they may split it into several chunks;...
... Note that some parsers will report whitespace in element content using the ignorableWhitespace method rather than this one (validating parsers must do so)...
In other words, I am afraid that your issue is the "standard behaviour" of a SAX parser.
I hope it helps.

How to Create XML file with SAX parser instead of DOM parser

HI ALL,
I am in need of creating an XML file by SAX parser ONLY. As far as my knowledge goes, we can use DOM for such purpose(by using createElement, creatAttribute ...). Can anyone tell me, is there any way to create an XML file using SAX Parser only. I mean, I just want to know whether SAX provides any sort of api for Creatign an element, attribute etc. I know that SAX is for event based parsing. But my requirement is to create an XML file from using only SAX parser.
Any help would be appreciated
Thanx in advance
Kaushik

Hi,
You must write a XMLWriter class yourself, and that Class extends DefaultHandle ....., the overwrite the startElement(url, localName, qName, attributeList), startDocument(), endElement().....and so on.
in startElement write your own logic about how to create a new element and how to create a Attribute list
in startDocument write your own logic about how to build a document and encodeType, dtd....
By using:
XMLWriter out = new XMLWriter()
out.startDocument();
Attribute attr1 = new Atribute();
attr1.add("name", "value");
out.startElement("","","Element1", attr1);
Attribute attr2 = new Atribute();
attr2.add("name", "value");
out.startElement("","","Element2", attr2);
out.endElement("","","Element2");
out.endElement("","","Element1");
out.endDocument();

Problem with SAX parser - entity must finish with a semi-colon

Hi,
I'm pretty new to the complexities of using SAXParserFactory and its cousins of XMLReaderAdapter, HTMLBuilder, HTMLDocument, entity resolvers and the like, so wondered if perhaps someone could give me a hand with this problem.
In a nutshell, my code is really nothing more than a glorified HTML parser - a web page editor, if you like. I read in an HTML file (only one that my software has created in the first place), parse it, then produce a Swing representation of the various tags I've parsed from the page and display this on a canvas. So, for instance, I would convert a simple <TABLE> of three rows and one column, via an HTMLTableElement, into a Swing JPanel containing three JLabels, suitably laid out.
I then allow the user to amend the values of the various HTML attributes, and I then write the HTML representation back to the web page.
It works reasonably well, albeit a bit heavy on resources. Here's a summary of the code for parsing an HTML file:
      htmlBuilder = new HTMLBuilder();
parserFactory = SAXParserFactory.newInstance();
parserFactory.setValidating(false);
parserFactory.setNamespaceAware(true);
FileInputStream fileInputStream = new FileInputStream(htmlFile);
InputSource inputSource = new InputSource(fileInputStream);
DoctypeChangerStream changer = new DoctypeChangerStream(inputSource.getByteStream());
changer.setGenerator(
   new DoctypeGenerator()
      public Doctype generate(Doctype old)
         return new DoctypeImpl
         old.getRootElement(),
                          old.getPublicId(),
                          old.getSystemId(),
         old.getInternalSubset()
      resolver = new TSLLocalEntityResolver("-//W3C//DTD XHTML 1.0 Transitional//EN", "xhtml1-transitional.dtd");
      readerAdapter = new XMLReaderAdapter(parserFactory.newSAXParser().getXMLReader());
      readerAdapter.setDocumentHandler(htmlBuilder);
      readerAdapter.setEntityResolver(resolver);
      readerAdapter.parse(inputSource);
      htmlDocument = htmlBuilder.getHTMLDocument();
      htmlBody = (HTMLBodyElement)htmlDocument.getBody();
      traversal = (DocumentTraversal)htmlDocument;
      walker = traversal.createTreeWalker(htmlBody,NodeFilter.SHOW_ELEMENT, null, true);
      rootNode = new DefaultMutableTreeNode(new WidgetTreeRootNode(htmlFile));
      createNodes(walker); However, I'm having a problem parsing a piece of HTML for a streaming video widget. The key part of this HTML is as follows:
            <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
              id="client"
        width="100%"
        height="100%"
              codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
              <param name="movie" value="client.swf?user=lkcl&stream=stream2&streamtype=live&server=rtmp://192.168.250.206/oflaDemo" />
         etc....You will see that the <param> tag in the HTML has a value attribute which is a URL plus three URL parameters - looks absolutely standard, and in fact works absolutely correctly in a browser. However, when my readerAdapter.parse() method gets to this point, it throws an exception saying that there should be a semi-colon after the entity 'stream'. I can see whats happening - basically the SAXParser thinks that the ampersand marks the start of a new entity. When it finds '&stream' it expects it to finish with a semi-colon (e.g. much like and other such HTML characters). The only way I can get the parser past this point is to encode all the relevant ampersands to %26 -- but then the web page stops working ! Aaargh....
Can someone explain what my options are for getting around this problem ? Some property I can set on the parser ? A different DTD ? Not to use SAX at all ? Override the parser's exception handler ? A completely different approach ?!
Could you provide a simple example to explain what you mean ?
Thanks in anticipation !

You probably don't have the ampersands in your "value" attribute escaped properly. It should look like this:
value="client.swf?user=lkcl&stream=...{code}
Most HTML processors (i.e. browsers) will overlook that omission, because almost nobody does it right when they are generating HTML by hand, but XML processors won't.

Problem with SAX parser with String format

hi, all I have the next problem:
I try to parse xml file with success, I write next code:
====================
my_class saxUms = new my_class();
File file = new File( "c:\\my_try_Response.xml" );
InputSource src1 = new InputSource( new FileInputStream( file ) );
XMLReader rdr = XMLReaderFactory.createXMLReader( "org.apache.xerces.parsers.SAXParser" ); rdr.setContentHandler( saxUms );
rdr.parse(src1);
===================
but when I try to parse the same in string variable, I write:
===================
my_class saxUms = new my_class();
StringReader strr = new StringReader(my_str);
InputSource intt = new InputSource(strr);
XMLReader prs= XMLReaderFactory.createXMLReader( "org.apache.xerces.parsers.SAXParser" );
prs.setContentHandler(saxUms);
prs.parse(intt);
===================
and error occurs:
"Exception: java.lang.ClassCastException: java.lang.StringBuffer"
how to fix the problem?
Thank you for collaboration!

where does the exception stack trace say the error is occurring?

XML closing tags missing throws exception with SAX Parser

Hey,
I'm trying to create an XML Document from some HTML.
I am getting this exception:
[Fatal Error] :1:334: The element type "input" must be terminated by the matching end-tag "</input>".
Exception in thread "main" java.lang.RuntimeException: org.xml.sax.SAXParseException: The element type "input" must be terminated by the matching end-tag "</input>".
     at server.XMLUtils.createDocument(XMLUtils.java:76)The xml is like this:
<html>
<input name="s" size="5">
</html>Is there some setting I can change in the parser to make it ignore missing closing tags?
Here is my current code
     public static Document createDocument(InputStream is) {
          try {
               Document doc;
               DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
               DocumentBuilder db = dbf.newDocumentBuilder();
               doc = db.parse(is);
               doc.getDocumentElement().normalize();
               is.close();
               return doc;
          } catch (Exception e) {
               throw new RuntimeException(e);
     }Thanks

Nether wrote:
Hey,
The xml is like this:
<html>
<input name="s" size="5">
</html>
That is not XML. It might qualify as HTML. An XML file would be
<html>
<input name="s" size="5"/>
</html>Winston

How to HTMLEditorKit's parser with Sax Parser?

How does one do it? I know you need to override getParser method. But the ParserCallback's handleStartTag, handleEndTag etc expect a parameter pos of type int. Needless to say, the pos is undocumented. I have not idea what value to pass. If I pass -1, I get some exceptions. Anyone has a working code snippet which he/she can share?
Thanks a bunch
Narayanan

ParserCallback is like an event listener.
Take for example a MouseListener. You don't invoke the mouseClicked(...) method. You add code to the mouseClicked(...) method to respond to the mouseClicked event.
Same thing with the ParserCallback. You don't invoke the handleStartTag(...) method. As the ParserCallback is parsing an HTML Document it will notify you when it finds a start tag in the Document. It tells you the tag it found and the position of the tag in the Document.
Here is a simple example that just displays all the text in the document:
import java.io.*;
import java.net.*;
import javax.swing.text.html.parser.*;
import javax.swing.text.html.*;
public class ParserCallbackText extends HTMLEditorKit.ParserCallback
     public void handleText(char[] data, int pos)
          System.out.println( data );
     public static void main(String[] args)
          throws Exception
          Reader reader = getReader(args[0]);
          ParserCallbackText parser = new ParserCallbackText();
          new ParserDelegator().parse(reader, parser, true);
     static Reader getReader(String uri)
          throws IOException
          // Retrieve from Internet.
          if (uri.startsWith("http:"))
               URLConnection conn = new URL(uri).openConnection();
               return new InputStreamReader(conn.getInputStream());
          // Retrieve from file.
          else
               return new FileReader(uri);
}

Reading xml file with sax parser: unknown protocol: c

Hi,
I've been googling around, and the best I can find is that the file name:
File test = new File("lib/test/parseTest/validate-test.xml");should be a url:
File test = new File("File://lib/test/parseTest/validate-test.xml");but I'm working on a linux machine and can't put "File://c:/pathToFile/file.xml"
Also, I did some testing and I can read a small xml file with just a few elements, but on large complex files, I get that error.
anyone ever run into this before?
bp
Edited by: badperson on Nov 1, 2008 2:19 PM

badperson wrote:
I've been googling around, and the best I can find is that the file name:
File test = new File("lib/test/parseTest/validate-test.xml");should be a url:
File test = new File("File://lib/test/parseTest/validate-test.xml");
No, that's wrong. The parameter for that constructor is a file path (relative or absolute). Not a URL. You must have misunderstood whatever you read.
but I'm working on a linux machine and can't put "File://c:/pathToFile/file.xml"What kind of a Linux machine is this which has a C drive? You must have misunderstood whoever told you to do that.

Sax parser problem

hi,
i am assuming the problem is with sax parser but i cant be sure. I am parsing a xml file (about 1.4MB) with some data in it. the parser i have created reads the xml file correctly for the most part but when at some point the
"public void characters(char buf[], int offset, int len) throws SAXException"
function stops working correctly....i.e it doesnt fully read read the data between the "<start>" and "</start>" element. say it reads about 100 id's correctly---for 101 ID it does this. This is just an example. Since, the problem might be with how :
"public void characters(char buf[], int offset, int len) throws SAXException"
function is reading the data i was wondering if anybody else had encountered this problem or please let me know if i need to change something in the code: here's a part of the code :
Bascially i have created three classes to enter data into three mysql tables and as i parse the data i fill up the columns by matching the column header with the tagName.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.*;
import java.io.*;
import java.util.ArrayList;
import java.lang.Object;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import java.util.*;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
public class Echo03 extends DefaultHandler
StringBuffer textBuffer;
int issuedValue, prodValue;
OrdHeader header = new OrdHeader();
OrdDetail detail = new OrdDetail();
Member memInfo = new Member();
//new addition to store the dynamic value of the products
TestOrdheader prod = new TestOrdheader();
int counter;
String tag, newTag;
SetValue setVal = new SetValue();
String test;
public static void main(String argv[])
if (argv.length != 1) {
System.err.println("Usage: cmd filename");
System.exit(1);
// Use an instance of ourselves as the SAX event handler
DefaultHandler handler = new Echo03();
// Use the default (non-validating) parser
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
// Set up output stream
out = new OutputStreamWriter(System.out, "UTF8");
// Parse the input
SAXParser saxParser = factory.newSAXParser();
saxParser.parse( new File(argv[0]), handler);
} catch (Throwable t) {
t.printStackTrace();
System.exit(0);
static private Writer out;
private String indentString = " "; // Amount to indent
private int indentLevel = 0;
//===========================================================
// SAX DocumentHandler methods
//===========================================================
public void startDocument()
throws SAXException
nl();
nl();
emit("START DOCUMENT");
nl();
emit("<?xml version='1.0' encoding='UTF-8'?>");
header.assign();
public void endDocument()
throws SAXException
nl(); emit("END DOCUMENT");
try {
nl();
out.flush();
} catch (IOException e) {
throw new SAXException("I/O error", e);
public void startElement(String namespaceURI,
String lName, // local name
String qName, // qualified name
Attributes attrs)
throws SAXException
indentLevel++;
nl(); //emit("ELEMENT: ");
String eName = lName; // element name
if ("".equals(eName)) eName = qName; // namespaceAware = false
if (qName.equals("Billing")){
issuedValue = 1;
}else if (qName.equals("Shipping")){
issuedValue = 2;
}else if (qName.equals("ShippingTotal")){
issuedValue = 3;
//check to see if "Product" is the name of the element thats coming next
if (qName.equals("Product")){
if (issuedValue != 3){
prodValue = 1;
prod.addCounter();
}else{
prodValue = 0;
tag = eName;
if (attrs != null) {
for (int i = 0; i < attrs.getLength(); i++) {
String aName = attrs.getLocalName(i); // Attr name
if ("".equals(aName)) aName = attrs.getQName(i);
nl();
emit(" ATTR: ");
emit(aName);
emit("\t\"");
emit(attrs.getValue(i));
emit("\"");
if (attrs.getLength() > 0) nl();
public void endElement(String namespaceURI,
String sName, // simple name
String qName // qualified name
throws SAXException
nl();
String eName = sName; // element name
if ("".equals(eName)){
eName = qName; // not namespaceAware
if ("Order".equals(eName)){
//enter into database
     databaseEnter();
textBuffer = null;
indentLevel--;
public void characters(char buf[], int offset, int len)
throws SAXException
nl();
try {
String s = new String(buf, offset, len);
if (!s.trim().equals("")){
settag(tag, s);
s = null;
}catch (NullPointerException E){
System.out.println("Null pointer Exception:"+E);
//===========================================================
// Utility Methods ...
//===========================================================
// Wrap I/O exceptions in SAX exceptions, to
// suit handler signature requirements
private void emit(String s)
throws SAXException
try {
out.write(s);
out.flush();
} catch (IOException e) {
throw new SAXException("I/O error", e);
// Start a new line
// and indent the next line appropriately
private void nl()
throws SAXException
String lineEnd = System.getProperty("line.separator");
try {
out.write(lineEnd);
for (int i=0; i < indentLevel; i++) out.write(indentString);
} catch (IOException e) {
throw new SAXException("I/O error", e);
===================================================================
///User defined methods
===================================================================
private String strsplit(String splitstr){
String delimiter = new String("=");
String[] value = splitstr.split(delimiter);
value[1] = value[1].replace(':', ' ');
return value[1];
public void settag(String tag, String s){
String pp_transid = null, pp_respmsg = null,pp_authid = null, pp_avs = null, pp_avszip = null;
if ((tag.equals("OrderDate")) || (tag.equals("OrderProcessingInfo"))){
if (tag.equals("OrderDate")){
StringTokenizer st = new StringTokenizer(s);
String orddate = st.nextToken();
String ordtime = st.nextToken();
header.put("ordDate", orddate);
header.put("ordTime", ordtime);
}else if (tag.equals("OrderProcessingInfo")){
StringTokenizer st1 = new StringTokenizer(s);
int tokenCount = 1;
while (tokenCount <= st1.countTokens()){
switch(tokenCount){
case 1:
String extra = st1.nextToken();
break;
case 2:
String Opp_transid = st1.nextToken();
pp_transid = strsplit(Opp_transid);
break;
case 3:
String Opp_respmsg = st1.nextToken();
pp_respmsg = strsplit(Opp_respmsg);
break;
case 4:
String Opp_authid = st1.nextToken();
pp_authid = strsplit(Opp_authid);
break;
case 5:
String Opp_avs = st1.nextToken();
pp_avs = strsplit(Opp_avs);
break;
case 6:
String Opp_avszip = st1.nextToken();
pp_avszip = strsplit(Opp_avszip);
break;
tokenCount++;
header.put("pp_transid", pp_transid);
header.put("pp_respmsg", pp_respmsg);
header.put("pp_authid", pp_authid);
header.put("pp_avs", pp_avs);
header.put("pp_avszip", pp_avszip);
}else{
newTag = new String(setVal.set_name(tag, issuedValue));
header.put(newTag, s);
//detail.put(newTag, s);
prod.put(newTag, s);
memInfo.put(newTag,s);
//Check to see-- if we should add this product to the database or not
boolean check = prod.checkValid(newTag, prodValue);
if (check){
prod.addValues(s);
setVal.clearMod();
==================================================================
Here's the error that i get:
java.util.NoSuchElementException
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:281)
at Echo03.main(Echo03.java:47)

I haven't gone through your code but I also had a similar error....and the exception in my was because of an "&" instead of the entity reference & in one of the element values. I use a non-validating parser but if you use a validating one then this might not be the reason for your exception.

Parsing the large XML ( 1GB) using SAX PARSER

We have very large XMLs being generated by processes. These XMLs should be validated first and then parsed next. We have implementation that works for small files. My question is
how can we validate and parse large XMLs with SAX parser?

The same way as parsing a small XML file, no? Why don't you try it? Then if you have problems that you can't solve, ask about them here.

Java SAX parser. How to get raw XML code of the currently parsing event?

Java SAX parser, please need a clue how to get the raw XML code of the currently parsing event... needed for logging, debugging purposes.
Here's and example, letting me clarify exactly what i need: (see the comments in source)
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
     //..Here... or maybe somewhere elsewhere I need on my disposal the raw XML code of
     //..every XML tags received from the XML stream. I need simply to write it down
     //..in a log file, for debugging purposes, while parsing. Can anyone give me a suggestion
     //..how can i implement such logging while the SAX parser only returns me the tagname and
     //..attributes. While parsing I want to log the XML code for every tag in
     //..its 'pure form', like it is comming from the server directly on the
     //..socket's input reader.
     if ("p".equals(qName)) {
          etc...
}Than you in advance.

YES!
I've solved my problem using class RecordingInputStream that wraps the InputStream
here is the class source code:
import java.io.ByteArrayOutputStream;
import java.io.FilterInputStream;
import java.io.InputStream;
import java.io.IOException;
* @author Unknown
class RecordingInputStream extends FilterInputStream {
     protected ByteArrayOutputStream sink;
    RecordingInputStream(InputStream in) {
        this(in, new ByteArrayOutputStream());
    RecordingInputStream(InputStream in, ByteArrayOutputStream sink) {
        super(in);
        this.sink = sink;
    public synchronized int read() throws IOException {
        int i = in.read();
        sink.write(i);
        return i;
    public synchronized int read(byte[] buf, int off, int len) throws IOException {
        int l = in.read(buf, off, len);
        sink.write(buf, off, l);
        return l;
    public synchronized int read(byte[] buf) throws IOException {
        return read(buf, 0, buf.length);
    public synchronized long skip(long len) throws IOException {
        long l = 0;
        int i = 0;
        byte[] buf = new byte[1024];
        while (l < len) {
            i = read(buf, 0, (int)Math.min((long)buf.length, len - l));
            if (i == -1) break;
            l += i;
        return l;
    byte[] getBytes() {
        return sink.toByteArray();
    void resetSink() {
        sink.reset();
} Then here is the initialization before use with SAX:
this.psock = new Socket(this.profile.httpServer, Integer.parseInt(this.profile.httpPort));
this.out = new PrintWriter(this.psock.getOutputStream(), true);
this.ris=new RecordingInputStream(this.psock.getInputStream());
this.in=new BufferedReader(new InputStreamReader(this.ris));
try {
     this.parser = SAXParserFactory.newInstance().newSAXParser();
     this.parser.parse(new InputSource(this.in),new XMLCommandsHandler());
catch (IOException ioex) { }
catch (Exception ex) { }Then the handler class looks like this (it will be an inner class, so you can access ris, from the parent class):
class XMLCommandsHandler extends DefaultHandler {
     public void startDocument() throws SAXException {
          //...nothing
     public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
          // BEGIN - Synchronized logging of raw XML source code in parallel with SAX parsing :)
          byte[] bs=ris.getBytes();
          logger.warn(new String(bs));
          ris.resetSink();
          // End logging
          if ("expectedTagThatTriggersMeToDoSomething".equals(qName)) {
               //...Do smth.
}Edited by: patladj on Jul 3, 2008 12:30 PM

Question on SAX Parser: retrieving child

Hi,
I am using SAX parser to parse the XML file, because the XML file size are huge. But here i need to retrieve the child nodes of the element. Is it possible with SAX parser to retrieve the child nodes? (Like DOM parser getChildNodes method)
Thanks in advance.

No, of course not. When you use SAX you write the code that stores the information. So if you need the child nodes, then write code that collects all child nodes.

How to deal with empty tags in a SAX Parser

Hi,
I hope someone can help me with the problem I am having!
Basically, I have written an xml-editor application. When an XML file is selected, I parse the file with a SAX parser and save the start and end locations of all the tags and character data. This enables me to display the xml file with the tags all nicely formatted with pretty colours. Truly it is a Joy To Behold. However, I have a problem with tags in this form:
<package name="boo"/>
because the SAX parser treats them like this:
<package name = boo>
</package>
for various complex reasons the latter is unaccetable so my question is: Is there some fiendishly clever method to detect tags of this type as they occur, so that I can treat them accordingly?
Thanks,
Chris

I have spent some time on googling for code doing this, but found nothing better, than I had to write in by myself.
So, it would be something like this. Enjoy :)
package comd;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.SAXException;
import org.xml.sax.Attributes;
import java.util.Stack;
import java.util.Enumeration;
public class EmptyTagsHandler extends DefaultHandler {
     private StringBuilder xmlBuilder;
     private Stack<XmlElement> elementStack;
     private String processedXml;
     private class XmlElement{
          private String name;
          private boolean isEmpty = true;
          public XmlElement(String name) {
               this.name = name;
          public void setNotEmpty(){
               isEmpty = false;
     public EmptyTagsHandler(){
          xmlBuilder = new StringBuilder();
          elementStack = new Stack();
     private String getElementXPath(){
          StringBuilder builder = new StringBuilder();
          for (Enumeration en=elementStack.elements();en.hasMoreElements();){
               builder.append(en.nextElement());
               builder.append("/");
          return builder.toString();
     public String getXml(){
          return processedXml;
     public void startDocument() throws SAXException {
          xmlBuilder = new StringBuilder();
          elementStack.clear();
          processedXml = null;
     public void endDocument() throws SAXException {
          processedXml = xmlBuilder.toString();
     public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
          if (!elementStack.empty()) {
               XmlElement elem = elementStack.peek();
               elem.setNotEmpty();
          xmlBuilder.append("<");
          xmlBuilder.append(qName);
          for (int i=0; i<attributes.getLength();i++){
               xmlBuilder.append(" ");
               xmlBuilder.append(attributes.getQName(i));
               xmlBuilder.append("=");
               xmlBuilder.append(attributes.getValue(i));
          xmlBuilder.append(">");
          elementStack.push(new XmlElement(qName));
     public void endElement(String uri, String localName, String qName) throws SAXException {
          XmlElement elem = elementStack.peek();
          if (elem.isEmpty) {
               xmlBuilder.insert(xmlBuilder.length()-1, "/");
          } else {
               xmlBuilder.append("</");
               xmlBuilder.append(qName);
               xmlBuilder.append(">");
          elementStack.pop();
     public void characters(char ch[], int start, int length) throws SAXException {
          if (!elementStack.empty()) {
               XmlElement elem = elementStack.peek();
               elem.setNotEmpty();
          String str = new String(ch, start, length);
          xmlBuilder.append(str);
     public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
          String str = new String(ch, start, length);
          xmlBuilder.append(str);
}

Changing xmlschema while parsing with sax

Hello world,
I`m using the sax-parser (xerces) and i want to combine different schema-files to parse an xml-String;
<root>
     <intervall>1,5</intervall>
     <nix>jetzt echt nix!</nix>
     <testtag>
          <text>huhu joe</text>
     </testtag>
     <theLast>das letzte element</theLast>
</root>e.g. i want to parse the tag testtag with another schema ??
does anyone have an idea or a sample coding ??
thank you very much

thank you for the reply, but i want to change the Schema file while parsing the xmlString with Sax, without manipulation the xmlString;
the xml-String i get is fixed;
wish you all a great sunday

Possible to overwrite parse method in DOM with SAX Handler?

Hi,
Is it possible to overwrite the parse method within DOM?
What a want to do is:
     private Node parseXml( String text ) throws SAXParseException, SAXException, IOException, ParserConfigurationException
          SAXParserFactory factory = SAXParserFactory.newInstance();
               factory.setNamespaceAware(true);
               SAXParser parser = factory.newSAXParser();
               TestHandler handler = new TestHandler();
               // Parse the file
               parser.parse(new InputSource(new StringReader(text)), handler);
          return (Node)handler.getRoot();
     } //end parseXml()The reason I want to use this is that within SAX I can write my own line counter so I keep a count of which node is on which line of text.
What I was thinking is that I could use SAX to return DOM Nodes with the line number attached, possibly using the node.setUserData() method?!
I have tried to play around with it and it doen't seem to work, can anyone help?
Cheers Alex

I have managaed to re-write my SAX parser to create a JTree, this works perfectly I can move through the tree and each line of text that corresponds to the node is highlighted.
My problem is however that in my application I have used the DOM structure throughout so some of the functionality is lost.
Is I understand that JAXP uses both SAX and DOM together, so I was wondering if it is possible to combine my sax parse method within the DOM?
If anything is unclear please say and I will try and explain better. The main reason for doing this is that I want to keep a reference to which line of text each node of the dom tree represents. I have not been able to implemnet one in DOM however using SAX I have managed.
Many thanks,
Alex

Probem with SAX parser

Similar Messages

Maybe you are looking for