Java DOM Parser (XML)

Could someone please give me a link where I can find a example of a DOM parser, w3c. That shows how to parse an xml string or file and build the tree then access parts of it? I cant find a basic example anywhere!

Check this
http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/dom/1_read.html

Similar Messages

Java - DOM Parsing - Reg

I am trying to get the value of the element - <e> -from an xml file which looks as below
<a>
<b>
<c> </c>
<d>
<e>SampleValue</e>
</d>
</b>
</a>
and I am using the Sun DOM1 parser. I am not sure what I missing I have tried using something like below
NodeList list = document.getElementByeTagName("b");
Node node = list.item(0);
NodeList list2 = node.getChildNodes();
for(i=0;i<list2.getLength();i++){
Node tempN = (Node)list2.item(i)
//I trying to get value of element "e"
System.out.print(tempN.getNodeValue());
I think I am missing something,could anyone ..help me out.
Thanks
ej

String eValue=document.getElementsByTagName("e").item(0).getFirstChild().getNodeValue();

DOM parsing XML

Hello guys,
I have a huge xml document with lots of nested tags I would want to be able to specify a tag and get the values that comes underneath that tag. Iam able to do that if i dont have any tags nested under the tag that am specifying.
How do i go about if i have tags nested within the parent tag?
I would really appreciate your help guys
Kay

Use XPath.
http://www.onjava.com/pub/a/onjava/2005/01/12/xpath.ht
mlThanks for the lead. I did use XPath and it was great. But one question.
XPath xpath = XPathFactory.newInstance().newXPath();
String str = xpath.evaluate(expression, doc);
The string that i get is values in the xml document but is in the exact format of the xml. i mean each value is printed in one line.
Is there better ways to get the results?
Thanks again
kay

Update XML using DOM parser

I am using Dom parser in java to parse xml.I am able to retrive data from xml.Can any one help me in updating an xml when data is modified in the user interface.I am created interface in html with three fields namely UserName , LastLogin, Modified fields.If Admin person wants to modify any of these three fields , those changes should reflect in xml also.
Thanks
divya

Code snippet
===========
OutputFormat outputFormat = new OutputFormat("XML","ISO-8859-1",true);
outputFormat.setDoctype(null,"emp.dtd")
It adds the DOCTYPE element but doesnt create the .DTD file.
<!DOCTYPE ROOT_EL SYSTEM "emp.dtd">
Any ideas?
Rgds,
Seetesh

Parsing an XML using DOM parser in Java in Recursive fashion

I need to parse an XML using DOM parser in Java. New tags can be added to the XML in future. Code should be written in such a way that even with new tags added there should not be any code change. I felt that parsing the XML recursively can solve this problem. Can any one please share sample Java code that parses XML recursively. Thanks in Advance.

Actually, if you are planning to use DOM then you will be doing that task after you parse the data. But anyway, have you read any tutorials or books about how to process XML in Java? If not, my suggestion would be to start by doing that. You cannot learn that by fishing on forums. Try this one for example:
http://www.cafeconleche.org/books/xmljava/chapters/index.html

Parsing xml using DOM parser in java

hi there!!!
i don have much idea about parsing xml.. i have an xml file which consists of details regarding indentation and spacing standards of C lang.. i need to read the file using DOM parser in java n store each of the attributes n elements in some data structure in java..
need help as soon as possible!!!

DOM is the easiest way to parse XML document, google for JDOM example it is very easy to implement.
you need to know what is attribute, what is text content and what is Value in XML then easily you can parse your document with dom (watch for space[text#] in your XML document when you parse it).
you get root node then nodelist of childs for root then go further inside, it is easy believe me.

Parsing XML using java DOM

hi
i am trying to parse a document and change a specific text value within an element althouh when i run the program it changes the nodes text however when i check the xml file it doesnt show the changes it remains the same the code that i am using is as follow iwould be greatful if any one culd help:
// ReplaceText.java
// Reads intro.xml and replaces a text node.
// Java core packages
import java.io.*;
// Java extension packages
import javax.xml.parsers.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import javax.xml.transform.dom.*;
// third-party libraries
import org.xml.sax.*;
import org.w3c.dom.*;
public class ReplaceText {
   private Document document;
   public ReplaceText()
      // parse document, find/replace element, output result
      try {
         // obtain default parser
         DocumentBuilderFactory factory =
            DocumentBuilderFactory.newInstance();
         // set parser as validating
         factory.setValidating( true );
         // obtain object that builds Documents
         DocumentBuilder builder = factory.newDocumentBuilder();
         // set error handler for validation errors
         builder.setErrorHandler( new MyErrorHandler() );
System.err.println( "reading" );
         // obtain document object from XML document
         File f = new File("D:/Documents and Settings/Administrator/Desktop/xml adv java bk/appC/intro.xml");
          System.err.println( "reading" );
         document = builder.parse(f);
//document = builder.parse( new File( "intro.xml" ) );
System.err.println( "reading document" );
         // retrieve the root node
         Node root = document.getDocumentElement();
         if ( root.getNodeType() == Node.ELEMENT_NODE ) {
            Element myMessageNode = ( Element ) root;
            NodeList messageNodes =
               myMessageNode.getElementsByTagName( "message5" );
            if ( messageNodes.getLength() != 0 ) {
               Node message = messageNodes.item( 0 );
                    System.out.println("iiiii");
               // create text node
               Text newText = document.createTextNode(
                  "New Changed Message!!" );
               // get old text node
               Text oldText =
                  ( Text ) message.getChildNodes().item( 0 );
               // replace text
               //message.removeChild(oldText);
               message.replaceChild( newText, oldText );
         // output Document object
         // create DOMSource for source XML document
         Source xmlSource = new DOMSource( document );
         // create StreamResult for transformation result
         Result result = new StreamResult( System.out );
         // create TransformerFactory
         TransformerFactory transformerFactory =
            TransformerFactory.newInstance();
         // create Transformer for transformation
         Transformer transformer =
            transformerFactory.newTransformer();
         transformer.setOutputProperty( OutputKeys.INDENT, "yes" );
           transformer.setOutputProperty( OutputKeys.STANDALONE, "yes" );
         // transform and deliver content to client
         transformer.transform( xmlSource, result );
      // handle exception creating DocumentBuilder
      catch ( ParserConfigurationException parserException ) {
         parserException.printStackTrace();
      // handle exception parsing Document
      catch ( SAXException saxException ) {
         saxException.printStackTrace();
      // handle exception reading/writing data
      catch ( IOException ioException ) {
         ioException.printStackTrace();
         System.exit( 1 );
      // handle exception creating TransformerFactory
      catch (
         TransformerFactoryConfigurationError factoryError ) {
         System.err.println( "Error while creating " +
            "TransformerFactory" );
         factoryError.printStackTrace();
      // handle exception transforming document
      catch ( TransformerException transformerError ) {
         System.err.println( "Error transforming document" );
         transformerError.printStackTrace();
   public static void main( String args[] )
      ReplaceText replace = new ReplaceText();
}the xml file that i am using is as follows:
<?xml version = "1.0"?>


<!DOCTYPE myMessage [
     <!ELEMENT myMessage (message, message5)>
     <!ELEMENT message (#PCDATA)>
     <!ELEMENT message5 (#PCDATA)>
]>
<myMessage>
     <message>welcome to the xml shhhhhushu</message>
     <message5>welcome to the xml shhhhhushu</message5>
</myMessage>i would be greatful if some one could please help.....

See if the Text 'oldText' actually has any text within it. Sometimes in DOM parsing, you will get something like:
Element
   Text (blank)
   Text (actual)
   Text (blank)Whereas you would expect to receive:
Element
   Text (actual)See if that is the case. If yes, modify your logic to iterate through the child text nodes until one with actual text inside of it (getNodeValue()) is found.
- Saish

Sample java code which reads xml attributes using DOM Parser

Hi Friends,
I am looking for a sample java code which uses the DOM Parser to read the attributes values.
My xml looks like below
<?xml version='1.0' encoding='UTF-8'?>
<root>
<header unid="100" status="true">
<validation stage="1" processed="10"/>
</header>
</root>
Experts please help...
Thanks in Advance
JJ

You have probably found lots of resources on the www for this by now, if not: [http://www.w3schools.com/dom/default.asp|http://www.w3schools.com/dom/default.asp]

Oracle XML DOM parser - attribute values are not printing on the screen ??

Hi Everyone,
I am just trying to use oracle DOM parser to paerse one of my xml file, java file can be compiled and run agianst a xml file, But I cannot see any attribute values printing on the screen..
Appreciate if anyone can help, where I have gone wrong please?
Below is the java file:
// menna puthe DOMSample eka - duwanawa 19/12/2005
import java.io.*;
import java.net.*;
import org.w3c.dom.*;
import org.w3c.dom.Node;
import oracle.xml.parser.v2.*;
public class DOMSample { //public class eka ***
static public void main(String[] argv){ // main method eka ###
try {
if (argv.length != 1){
// Must pass in the name of the XML file...
System.err.println("Usage: java DOMSample filename");
System.exit(1);
// Get an instance of the parser
DOMParser parser = new DOMParser();
// Generate a URL from the filename.
URL url = createURL(argv[0]);
// Set various parser options: validation on,
// warnings shown, error stream set to stderr.
parser.setErrorStream(System.err);
parser.showWarnings(true);
// Parse the document.
parser.parse(url);
// Obtain the document.
Document doc = parser.getDocument();
// Print document elements
System.out.print("The elements are: ");
printElements(doc);
// Print document element attributes
System.out.println("The attributes of each element are: ");
printElementAttributes(doc);
catch (Exception e){
System.out.println(e.toString());
} // main method eka ###
static void printElements(Document doc) {
NodeList nl = doc.getElementsByTagName("*");
Node n;
for (int i=0; i<nl.getLength(); i++){
n = nl.item(i);
System.out.print(n.getNodeName() + " ");
System.out.println();
static void printElementAttributes(Document doc){
NodeList nl = doc.getElementsByTagName("*");
Element e;
Node n;
NamedNodeMap nnm;
String attrname;
String attrval;
int i, len;
len = nl.getLength();
for (int j=0; j < len; j++){
e = (Element)nl.item(j);
System.out.println(e.getTagName() + ":");
nnm = e.getAttributes();
if (nnm != null){
for (i=0; i<nnm.getLength(); i++){
n = nnm.item(i);
attrname = n.getNodeName();
attrval = n.getNodeValue();
System.out.print(" " + attrname + " = " + attrval);
System.out.println();
static URL createURL(String filename) { // podi 3 Start
URL url = null;
try {
url = new URL(filename);
} catch (MalformedURLException ex) { /// BBBBBB
try {
File f = new File(filename);
url = f.toURL();
} catch (MalformedURLException e) {
System.out.println("Cannot create URL for: " + filename);
System.exit(0);
} // BBBBBB
return url;
} // podi 3 End
} //public class eka ***
// End of program
output comes as below:
Isbn:
Title:
Price:
Author:
Message was edited by:
chandanal

Hi Chandanal,
I edited your code slightly and I was able to get the correct output.
I changed the following line:
for (int j=0; j >< len; j++)to:
for (int j=0; j < len; j++)I have included the complete source below:
// menna puthe DOMSample eka - duwanawa 19/12/2005
import java.io.*;
import java.net.*;
import org.w3c.dom.*;
import org.w3c.dom.Node;
import oracle.xml.parser.v2.*;
public class DOMSample {
    //public class eka ***
    public static void main(String[] argv) {
        // main method eka ###
        try {
            if (argv.length != 1) {
                // Must pass in the name of the XML file...
                System.err.println("Usage: java DOMSample filename");
                System.exit(1);
            // Get an instance of the parser
            DOMParser parser = new DOMParser();
            // Generate a URL from the filename.
            URL url = createURL(argv[0]);
            // Set various parser options: validation on,
            // warnings shown, error stream set to stderr.
            parser.setErrorStream(System.err);
            parser.showWarnings(true);
            // Parse the document.
            parser.parse(url);
            // Obtain the document.
            Document doc = parser.getDocument();
            // Print document elements
            System.out.print("The elements are: ");
            printElements(doc);
            // Print document element attributes
            System.out.println("The attributes of each element are: ");
            printElementAttributes(doc);
        } catch (Exception e) {
            System.out.println(e.toString());
    // main method eka ###
    static void printElements(Document doc) {
        NodeList nl = doc.getElementsByTagName("*");
        Node n;
        for (int i = 0; i < nl.getLength(); i++) {
            n = nl.item(i);
            System.out.print(n.getNodeName() + " ");
        System.out.println();
    static void printElementAttributes(Document doc) {
        NodeList nl = doc.getElementsByTagName("*");
        Element e;
        Node n;
        NamedNodeMap nnm;
        String attrname;
        String attrval;
        int i, len;
        len = nl.getLength();
        for (int j = 0; j < len; j++) {
            e = (Element)nl.item(j);
            System.out.println(e.getTagName() + ":");
            nnm = e.getAttributes();
            if (nnm != null) {
                for (i = 0; i < nnm.getLength(); i++) {
                    n = nnm.item(i);
                    attrname = n.getNodeName();
                    attrval = n.getNodeValue();
                    System.out.print(" " + attrname + " = " + attrval);
            System.out.println();
    static URL createURL(String filename) {
        // podi 3 Start
        URL url = null;
        try {
            url = new URL(filename);
        } catch (MalformedURLException ex) {
            /// BBBBBB
            try {
                File f = new File(filename);
                url = f.toURL();
            } catch (MalformedURLException e) {
                System.out.println("Cannot create URL for: " + filename);
                System.exit(0);
        // BBBBBB
        return url;
    // podi 3 End
} //public class eka ***-Blaise

Parse XML in a java stored proc

I am trying to parse an xml document in a java stored procedure. Just following my nose, I have developed a stored proc that works fine in development (outside the database using JRE 1.4.1) using the Xerces 2.5 parser. But, after having transferred the xerces xercesImpl.jar, xmlapis.jar, and my implementation class into oracle using loadjava when I call my stored proc the code throws an exception trying to build the document with an error like:
NoClassDef exception org.apache.xerces.jaxp.DocumentFactoryBuilderImpl
My Code looks like this:
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
InputStream is = getXMLAsInputStream(xml);
try {
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse( is );
... parse the document ....
catch (FactoryConfigurationError e) {
// unable to get a document builder factory
The exception caught is a FactoryConfigurtionError.
I'm not particularly attached to xerces, I'm really just looking for a way to parse XML inside my java stored proc, so any help to solve my problem, or an alternative suggestion will be greatly appreciated.
thanks
Dale

I looked again and sure enough the xerces implementation classes were missing. I had run a .cmd file containing these two lines, but it looks like only the first one ran...
loadjava -u ncc/xyz@usd -v -r M:\Database\JavaGeocode\Xerces2_5_0\xml-apis.jar
loadjava -u ncc/xyz@usd -v -r M:\Database\JavaGeocode\Xerces2_5_0\xercesImpl.jar
Now I've got everything working fine with Xerces!
Dale

Problem in parsing a xml string using dom parser

i want to parse a Xml String using a Dom parser......the parse function in dom parser takes only input stream as argument.......so i made the code as
InputStream inputstream = new StringBufferInputStream(XmlData) ;
InputSource inputSource = new InputSource(inputstream );
but saxexception is coming and also warning called
"java.io.StringBufferInputStream in java.io has been deprecated"
please help me.........

i want to parse a Xml String using a Dom
parser......the parse function in dom parser takes
only input stream as argument.......This is not true of the DOM parser in Java 1.4. So you might want to get rid of your old parser and replace it by something more current. Or perhaps you are using 1.4 and you just didn't read all of the API docs.

How to parse XML to Java object... please help really stuck

Thank you for reading this email...
If I have a **DTD** like:
<!ELEMENT person (name, age)>
<!ATTLIST person
     id ID #REQUIRED
>
<!ELEMENT name ((family, given) | (given, family))>
<!ELEMENT age (#PCDATA)>
<!ELEMENT family (#PCDATA)>
<!ELEMENT given (#PCDATA)>
the **XML** like:
<person id="a1">
<name>
     <family> Yoshi </family>
     <given> Samurai </given>
</name>
<age> 21 </age>
</person>
**** Could you help me to write a simple parser to parse my DTD and XML to Java object, and how can I use those objects... sorry if the problem is too basic, I am a beginner and very stuck... I am very confuse with SAXParserFactory, SAXParser, ParserAdapter and DOM has its own Factory and Parser, so confuse...
Thank you for your help, Yo

Hi, Yo,
Thank you very much for your help. And I Wish you are there...I'm. And I plan to stay - It's sunny and warm here in Honolulu and the waves are up :)
A bit more question for dear people:
In the notes, it's mainly focus on JAXB,
1. Is that mean JAXB is most popular parser for
parsing XML into Java object? With me, definitely. There are essentially 3 technologies that allow you to parse XML documents:
1) "Callbacks" (e.g. SAX in JAXP): You write a class that overrides 3 methods that will be called i) whenever the parser encounters a start tag, ii) an end tag, or iii) PCDATA. Drawback: You have to figure out where the heck in the document hierarchy you are when such a callback happens, because the same method is called on EACH start tag and similarly for the end tag and the PCDATA. You have to create the objects and put them into your own data structure - it's very tedious, but you have complete control. (Well, more or less.)
2) "Tree" (e.g. DOM in JAXP, or it's better cousin JDOM): You call a parser that in one swoop creates an entire hierarchy that corresponds to the XML document. You don't get called on each tag as with SAX, you just get the root of the resulting tree. Drawback: All the nodes in the tree have the same type! You probably want to know which tags are in the document, don't you? Well, you'll have to traverse the tree and ask each node: What tag do you represent? And what are your attributes? (You get only strings in response even though your attributes often represent numbers.) Unless you want to display the tree - that's a nice application, you can do it as a tree model for JTree -, or otherwise don't care about the individual tags, DOM is not of much help, because you have to keep track where in the tree you are while you traverse it.
3) Enter JAXB (or Castor, or ...): You give it a grammar of the XML documents you want to parse, or "unmarshall" as the fashion dictates to call it. (Actually the name isn't that bad, because "parsing" focuses on the input text while "unmarshalling" focuses on the objects you get, even though I'd reason that it should be marshalling that converts into objects and unmarshalling that converts objects to something else, and not vice versa but that's just my opinion.) The JAXB compiler creates a bunch of source files each with one (or now more) class(es) (and now interfaces) that correspond to the elements/tags of your grammar. (Now "compiler" is a true jevel of a misnomer, try to explain to students that after they run the "compiler", they still need to compile the sources the "compiler" generated with the real Java compiler!). Ok, you've got these sources compiled. Now you call one single method, unmarshall() and as a result you get the root node of the hierarchy that corresponds to the XML document. Sounds like DOM, but it's much better - the objects in the resulting tree don't have all the same type, but their type depends on the tag they represent. E.g if there is the tag <ball-game> then there will be an object of type myPackage.BallGame in your data structure. It gets better, if there is <score> inside <ball-game> and you have an object ballGame (of type BallGame) that you can simply call ballGame.getScore() and you get an object of type myPackage.Score. In other words, the child tags become properties of the parent object. Even better, the attributes become properties, too, so as far as your program is concerned there is no difference whether the property value was originally a tag or an attribute. On top of that, you can tell in your schema that the property has an int value - or another primitive type (that's like that in 1.0, in the early release you'll have to do it in the additional xjs file). So this is a very natural way to explore the data structure of the XML document. Of course there are drawbacks, but they are minor: daunting complexity and, as a consequence, very steep learning curve, documentation that leaves much to reader's phantasy - read trial and error - (the user's guide is too simplicistic and the examples too primitive, e.g. they don't even tell you how to make a schema where a tag has only attributes) and reference manual that has ~200 pages full of technicalities and you have to look with magnifying glas for the really usefull stuff, huge number of generated classes, some of which you may not need at all (and in 1.0 the number has doubled because each class has an accompanying interface), etc., etc. But overall, all that pales compared to the drastically improved efficiency of the programmer's efforts, i.e. your time. The time you'll spend learning the intricacies is well spent, you'll learn it once and then it will shorten your programming time all the time you use it. It's like C and Java, Java is order of magnitude more complex, but you'd probably never be sorry you gave up C.
Of course the above essay leaves out lots and lots of detail, but I think that it touches the most important points.
A word about JAXB 1.0 vs. Early Release (EA) version. If you have time, definitively learn 1.0, they are quite different and the main advantage is that the schema combines all the info that you had to formulate in the DTD and in the xjs file when using the EA version. I suggested EA was because you had a DTD already, but in retrospect, you better start from scratch with 1.0. The concepts in 1.0 are here to stay and once your surmounted the learning curve, you'll be glad that you don't have to switch concepts.
When parser job is done,
what kind of Java Object we will get? (String,
InputStream or ...)See above, typically it's an object whose type is defined as a class (and interface in 1.0) within the sources that JABX generates. Or it can be a String or one of the primitive types - you tell the "compiler" in the schema (xjs file in EA) what you want!
2. If we want to use JAXB, we have to contain a
XJS-file? Something like:In EA, yes. In 1.0 no - it's all in the schema.
I am very new to XML, is there any simpler way to get
around them? It has already take me 4 days to find a
simple parser which give it XML and DTD, then return
to me Java objects ... I mean if that kind of parser
exists....It'll take you probably magnitude longer that that to get really familiar with JAXB, but believe me it's worth it. You'll save countless days if not weeks once you'll start developing serious software with it. How long did it take you to learn Java and it's main APIs? You'll either invest the time learning how to use the software others have written, or you invest it writing it yourself. I'll take the former any time. But it's only my opinion...
Jan

How to parse xml in java

i wrote java client to invoke webservice(TIBCO) as a result i am getting back xml. now i have to parse xml and use the information. can anyone pls advise on this.
thanks

There are two kinds of parser available. One converts the XML to a Document Object Model (DOM). This is a heirarchy of Node objects each of which represents an element of XML, a tag, an attribute a piece of text etc.. Then you walk the graph extracting what you want.
The other kind is the SAX event parser. You give this a callback (extends DefaultHandler) and it calls appropriate methods for each element as it's encountered.
The second method is probably slight more complex to use but will deal with files of unlimited size without huge memory usage.
In both cases you get the parser using a Factory/Interface pattern. You'll find the factory classes in javax.xml.parsers. The rest of the DOM stuff is in org.w3c.dom and the SAX stuff in org.xml.sax.

How to parse xml data into java component

hi
everybody.
i am new with XML, and i am trying to parse xml data into a java application.
can anybody guide me how to do it.
the following is my file.
//MyLogin.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
class MyLogin extends JFrame implements ActionListener
     JFrame loginframe;
     JLabel labelname;
     JLabel labelpassword;
     JTextField textname;
     JPasswordField textpassword;
     JButton okbutton;
     String name = "";
     FileOutputStream out;
     PrintStream p;
     Date date;
     GregorianCalendar gcal;
     GridBagLayout gl;
     GridBagConstraints gbc;
     public MyLogin()
          loginframe = new JFrame("Login");
          gl = new GridBagLayout();
          gbc = new GridBagConstraints();
          labelname = new JLabel("User");
          labelpassword = new JLabel("Password");
          textname = new JTextField("",9);
          textpassword = new JPasswordField(5);
          okbutton = new JButton("OK");
          gbc.anchor = GridBagConstraints.NORTHWEST;
          gbc.gridx = 1;
          gbc.gridy = 5;
          gl.setConstraints(labelname,gbc);
          gbc.anchor = GridBagConstraints.NORTHWEST;
          gbc.gridx = 2;
          gbc.gridy = 5;
          gl.setConstraints(textname,gbc);
          gbc.anchor = GridBagConstraints.NORTHWEST;
          gbc.gridx = 1;
          gbc.gridy = 10;
          gl.setConstraints(labelpassword,gbc);
          gbc.anchor = GridBagConstraints.NORTHWEST;
          gbc.gridx = 2;
          gbc.gridy = 10;
          gl.setConstraints(textpassword,gbc);
          gbc.anchor = GridBagConstraints.NORTHWEST;
          gbc.gridx = 1;
          gbc.gridy = 15;
          gl.setConstraints(okbutton,gbc);
          Container contentpane = getContentPane();
          loginframe.setContentPane(contentpane);
          contentpane.setLayout(gl);
          contentpane.add(labelname);
          contentpane.add(labelpassword);
          contentpane.add(textname);
          contentpane.add(textpassword);
          contentpane.add(okbutton);
          okbutton.addActionListener(this);
          loginframe.setSize(300,300);
          loginframe.setVisible(true);
     public static void main(String a[])
          new MyLogin();
     public void reset()
          textname.setText("");
          textpassword.setText("");
     public void run()
          try
               String text = textname.getText();
               String blank="";
               if(text.equals(blank))
                  System.out.println("First Enter a UserName");
               else
                    if(text != blank)
                         date = new Date();
                         gcal = new GregorianCalendar();
                         gcal.setTime(date);
                         out = new FileOutputStream("log.txt",true);
                         p = new PrintStream( out );
                         name = textname.getText();
                         String entry = "UserName:- " + name + " Logged in:- " + gcal.get(Calendar.HOUR) + ":" + gcal.get(Calendar.MINUTE) + " Date:- " + gcal.get(Calendar.DATE) + "/" + gcal.get(Calendar.MONTH) + "/" + gcal.get(Calendar.YEAR);
                         p.println(entry);
                         System.out.println("Record Saved");
                         reset();
                         p.close();
          catch (IOException e)
               System.err.println("Error writing to file");
     public void actionPerformed(ActionEvent ae)
          String str = ae.getActionCommand();
          if(str.equals("OK"))
               run();
               //loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}

hi, thanks for ur reply.
i visited that url, i was able to know much about xml.
so now my requirement is DOM.
but i dont know how to code in my existing file.
means i want to know what to link all my textfield to xml file.
can u please help me out. i am confused.
waiting for ur reply

Context change by DOM parsing Java Mapping in XI

Hi Team,
I would like to know that how can I handle Context Change by DOM Parser Java Mapping in XI.?
Suppose the source XML structure I have like below:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Header xmlns:ns0="urn:bp:xi:hr:edm:test:100">
   <FileName>
      <filesub>
         <subname>a</subname>
         <subname>b</subname>
         <subname>c</subname>
      </filesub>
   </FileName>
   <FileName>
      <filesub>
         <subname>d</subname>
         <subname>e</subname>
         <subname>f</subname>
      </filesub>
   </FileName>
</ns0:Header>
Where the field FileName can occur maximum thrice(0...3) but the subname field is (0....unbounded) but in the target source I would like to have as given below:
<?xml version="1.0" encoding="UTF-8" ?>
- <MT_Test4 xmlns="urn:bp:xi:hr:edm:test:100">
- <Header>
<FileName>a</FileName>
<FileName1>d</FileName1>
    </Header>
- <Header>
<FileName>b</FileName>
<FileName1>e</FileName1>
   </Header>
Header>
<FileName>c</FileName>
<FileName1>f</FileName1>
   </Header>
</MT_Test4>
That means the first value from every context of the source field is forming my first and second value in my target first context.Thensecond value from every context is forming my 1st and 2nd value of my target 2nd context and finally 3rd value of every context is forming my 1st and 2nd value of my target 3rd context.Is this possible to done through DOM parsing or we have to do it by UDF only?

Hi Atanu,
    In my last post I gave an alogorithm to solve the mapping problem. Here is the complete program for the mapping.
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationException;
public class DOMParser1 implements StreamTransformation{
     public void execute(InputStream in, OutputStream out)
               throws StreamTransformationException {
          try
               DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
               DocumentBuilder builderel=factory.newDocumentBuilder();
               /input document in form of XML/
               Document docIn=builderel.parse(in);
               /document after parsing/
               Document docOut=builderel.newDocument();
               TransformerFactory tf=TransformerFactory.newInstance();
               Transformer transform=tf.newTransformer();
               Element root,child,child1=null;
               Node textChild;
               NodeList l;
               int i,n1,j,div,k;
               String s[];
               root=docOut.createElement("MT_Test4");
               root.setAttribute("xmlns","urn:bp:xi:hr:edm:test:100");
               l=docIn.getElementsByTagName("subname");
               n1=l.getLength();
               s=new String[n1];
               for(i=0;i<n1;++i)
                         s<i>=l.item(i).getFirstChild().getNodeValue();
               l=docIn.getElementsByTagName("filesub");
               div=l.getLength();
               j=n1/div;
               for(i=0,k=0;i<j;++i)
                    child1=docOut.createElement("Header");
                    root.appendChild(child1);
                    child=docOut.createElement("FileName");
                    textChild=docOut.createTextNode(s[k]);
                    child.appendChild(textChild);
                    child1.appendChild(child);
                    child=docOut.createElement("FileName1");
                    textChild=docOut.createTextNode(s [ k + j ]);
                    child.appendChild(textChild);
                    child1.appendChild(child);
                    ++k;
               docOut.appendChild(root);
               transform.transform(new DOMSource(docOut), new StreamResult(out));
          catch(Exception e)
               e.printStackTrace();
     public void setParameter(Map arg0) {
     public static void main(String[] args) {
          try{
               DOMParser1 genFormat=new DOMParser1();
               FileInputStream in=new FileInputStream("C:/Apps/my dw/sdnq/apps.xml");
               FileOutputStream out=new FileOutputStream("C:/Apps/my dw/sdnq/tgt1.xml");
               genFormat.execute(in,out);
          catch(Exception e)
               e.printStackTrace();
source -> apps.xml
<?xml version="1.0" encoding="UTF-8" ?>
- <ns0:Header xmlns:ns0="urn:bp:xi:hr:edm:test:100">
- <FileName>
- <filesub>
<subname>a</subname>
<subname>b</subname>
<subname>c</subname>
</filesub>
</FileName>
- <FileName>
- <filesub>
<subname>d</subname>
<subname>e</subname>
<subname>f</subname>
</filesub>
</FileName>
</ns0:Header>
target structure -> tgt1.xml
<?xml version="1.0" encoding="UTF-8" ?>
- <MT_Test4 xmlns="urn:bp:xi:hr:edm:test:100">
- <Header>
<FileName>a</FileName>
<FileName1>d</FileName1>
</Header>
- <Header>
<FileName>b</FileName>
<FileName1>e</FileName1>
</Header>
- <Header>
<FileName>c</FileName>
<FileName1>f</FileName1>
</Header>
</MT_Test4>
Hope this helps
one more thing in this line "textChild=docOut.createTextNode(s k + j );"   somehow the the third braces one opening before k and one closing after j is missing for unknown reasons. Please correct it when you actually run this code.
regards
Anupam
Edited by: anupamsap on Mar 7, 2011 12:47 PM

Java DOM Parser (XML)

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