Mapping one node to many nodes

How do you map one node in a controller context to many other nodes in another controller context?
Here's the situation I'd be using this.
I have an Adaptive RFC model from which I created a Custom Controller. I then used the wizard to map to the model.
The model corresponds to RFC functions and many of those functions accept the same parameters, LanID for instance. I simply want to have one "LanID" node in a controller that I would set. The change would then propagate to the other LanID context nodes in the Custom Controller mapped to the model.
What's the best way to handle this?

If I understand correctly.. B1, B2 and B3 are all in the SAME custom controller? Even if they are, I don't see a problem of mapping them all to A1 which is in another controller. Let's say that A1 is the "original" node, and B1, B2 and B3 are the "mapped" nodes.
If you require that B1, B2 and B3 are "original" nodes, and A1 is the "mapped" node, then this is scenario is impossible.
If you can be more specific, I will try to answer your question better.
Walter

Similar Messages

Mapping one node in a view context to many nodes in the component controlle

Hi guys,
I need to map an element (attribute) of a node in the View Context to an attribute of multi nodes of the same type:
Context View:
customer_no
      |
      | -> KUNNR
Component Controller Context having two nodes:
- Node1
     RFC1
        |
        |->KUNNR
- Node2
      RFC2
         |
         |->KUNNR
Above I need to map the (KUNNR) in customer_no node to KUNNR in the RFC1 RFC2 before i execute the two RFCs services.
Note:
if this is not possible would you mention another solution.
Thanks,

Hi,
   As per MVC you cannot map context from view controller to component controller.Mapping can happen from component
controller to view controller.
You cannot create mapping for context attributes. You can map nodes if both source node and destination node both has same structure and same number of attributes. If they dont contain same number of attributes the extra attributes from the source node gets copied to the destination node.
In your case before the RFC execution you can read the value of attribute Kunnr from view and set it the RFC attribute Kunnr before the Function module execution.
Regards
Bala Baskaran.S

Message mapping: one as many, function node

hi
how to use - one as many - function node in mapping. i want to mapping one value from source structure to many fields in target structure. but i dont know the exact functionality of - one as many -
kindly solve my issue
regards
mano

Hi,
Check out this example from SAP, which demos the use of the function oneAsMany:
[http://help.sap.com/saphelp_nw04/helpdata/en/38/85b142fa26c811e10000000a1550b0/frameset.htm]
Hope this helps,
Sumant.

PI Message Mapping One Source to create two of the same Target Nodes.

Hi,
I have a source node that contacts the following.
"1234-5678".
When there is a "-" in the source node then I need to create two target nodes.
When there is no "-" in the source node then only create one node.
Since the source structure is a flat structure by on the target side as you can see I am trying to achieve a diep structure.
Please can you assist in how to do this with PI message mapping.
Regards
Willie Hugo

Hi,
"1234-5678" only occurs once in the source. There is no source xml node that will occur more that once. The whole structure only occurs once. But on the target side I need one of the node to occur more than once if a hyphen is found in the source field.
Source Message                      - Always only one data node.
==============
<root>
<OnceOnlyNode>1234-5678</OnceOnlyNode>                   [1..1]
</root>
Target Message                      - Only two text node when "-" in source, else only one text node.
=============
<msg>
<text>1234</text>
<text>6789</text>
</msg>
How can this be done using standard PI message mapping functions. Can it be done?
Regards
Willie Hugo

PI Mapping : Generating multiple nodes by one node

Hi,
I'm looking for the solution how to generate two nodes by one node in source messages. In the following sample messages, two nodes in source are expected to generate 4 nodes in output.
Source Structure
<item>
     <id>
     <name>
</item>
Target structure
<article>
     <flag>
     <id>
     <name>
</article>
Source message instance
<item>
     <id>1</id>
     <name>ABC</name>
</item>
<item>
     <id>2</id>
     <name>XYZ</name>
</item>
Expected output message
<article>
     <flag>QD</flag>
     <id>1</id>
     <name>ABC</name>
</article>
<article>
     <flag>QI</flag>
     <id>1</id>
     <name>ABC</name>
</article>
<article>
     <flag>QD</flag>
     <id>2</id>
     <name>XYZ</name>
</article>
<article>
     <flag>QI</flag>
     <id>2</id>
     <name>XYZ</name>
</article>
In output message, two node of article 1 should be together.
Thanks in advance!
Victor

Hey thanks to all that contributed to the solution of this.
I'm a newby to message mapping of SAP PI.
But in my learning process I found out that the solution proposed in :
http://help.sap.com/saphelp_nw04/helpdata/en/26/d22366565be0449d7b3cc26b1bab10/content.htm
using the copyvalue function
is not working for the case where you have 2 partnernodes in the partnermsg. In this case the proposed solution is putting the street,city and zipcode of the first partnernode in both the targetnodes created in the mapping.
After some thinking about how to solve it I came up with the solution :
I created 3 UDF's ( getstreet ,getcity and getzipcode) :
public void getstreet(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i < var1.length; i++) {
if ( (i%3) == 0) {
   result.addValue(var1<i>);
public void getcity(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i < var1.length; i++) {
if ( (i%3) == 1) {
   result.addValue(var1<i>);
public void getzipcode(String[] var1, ResultList result, Container container) throws StreamTransformationException{
for (int i = 0; i < var1.length; i++) {
if ( (i%3) == 2) {
   result.addValue(var1<i>);
the mapping for the target field street :
street = splitbyvalue ( getstreet(removecontext(addrdat))    "each value")
similar mappings need to be set for city and zipcode.
other mappings are :
customermsg = partnermsg
customer = createif(exists(partner)))
name = name
this solves the issue for the 2 partnernodes without using the copyvalue function

Why only gets one node when select many nodes of tree in DWCS4 on Mac OS

I use tag <mm:treecontrol> to create tree in DWCS4 on Mac OS.
When I select many nodes in tree, but I only get one node by method: selectedNodes.
codes of created tree as following:
<mm:treecontrol name='tree' size='20' multiple noheaders>
     <mm:treecolumn state='hidden'>
          <mm:treenode value='A' state='expanded'></mm:treenode>
          <mm:treenode value='B' state='expanded'></mm:treenode>
          <mm:treenode value='C' state='expanded'></mm:treenode>
</mm:treecontrol>
Who can tell me reasons?
Thanks!
comments: if don't use tag <mm:treecolumn>, tree will not show on Mac OS.

Hi macbig,
I finally got to look at my sister's computer. The HDD "Repair Disk" found missing threads, missing directory records, etc. and ended with:
Error: Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-
up files.
Then, I tried "Verify Disk" and it found invalid volume file count and ended with:
The volume Macintosh HD was found corrupted and needs to be repaired.
Error: This disk needs to be repaired. Click Repair Disk
I guess running Apple Hardware Test is not going to happen. :/
I've ordered online a new 2.5 disk, make a Maverick boot USB, and start from scratch. Do you have any other suggestions?
As for the corrupted old hard drive, do you have any suggestions of how to get out the data somehow?
Thank you so much!

Context Mapping: child-nodes of non-mapped parent nodes

I am somewhat curious about Context Mapping in WebDynpro.
Which parents nodes need to be mapped in order to map child nodes ? Does a child node has more than one parent node (e.g. grandparent - two steps above) ?
A.1 -
MAPPED----
>    B.1
- A1.1   NOT MAPPED
- A1.2   NOT MAPPED
        - A.1.2.1     MAPPED TO>    B.1.2.4
        - A.1.2.2   NOT MAPPED
- A1.3   NOT MAPPED
Is it sufficient that only one of these parent nodes (e.g. direct parent node not mapped, but parent node of this parent node is mapped) need to be mapped so that the child node can be mapped ?
Is this assumption true or not ?
The SAP library states:
"Conversely, child nodes of non-mapped parent nodes cannot be mapped, otherwise this would result in irresolvable conflicts at runtime with respect to the parent-child relation in the context and the mapping relation." (http://help.sap.com/saphelp_nw04/helpdata/de/51/a3384162316532e10000000a1550b0/content.htm)
This statement is not absolutely clear on this issue.

Let me put it this way
You have a node vehicle and you have a child node for that the car. The car node have parameters car1, car2.
Let the vehicle node have parameters veh1 and veh2
Then if you map vehicle node one to any other node (say in the comp. controller) you have the option of mapping its children i.e veh1,veh2 and carnode.
You can have that veh1 is mapped and veh2 is not mapped.
vehicle node(mapped)
veh1(may or may not be mapped)
veh2(may or may not be mapped)
car node(may or may not be mapped)
If instead you try to map only the car node the vehicle node will also get mapped automatically but not it's child parameters like veh1 and veh2.
vehicle node(mapped)
veh1(may or may not be mapped)
veh2(may or may not be mapped)
car nodemapped)
car1(may or may not be mapped)
car2(may or may not be mapped)
Hope this would help.
Do revert for further clarification
Regards
Noufal

Mapping scenario with one customer and many invoices

Hi!
I am receiving a flat file with one customer and n-invoice records. The file could look like this:
133133222051241480320842420500089
13317350071000010806372131000                 0015890009876543X
13317350071000010806372131000                 0015890009876543X
13317350071000010806372131013                 0015890009876443X
13317350071000010806372131014                 0015890009872343X
where the first line is customer and the rest are invoices.
My question is: How can I get this into a structure like this:
<Customer>
<...>
<Invoice>
<...>
<Invoice>
<...>
When using content conversion (Customer,1,Invoice,*) there has to be specified a key field, which is not a possibility. Do I have to create a UDF for this to get the mapping I want?
Thanks for your answers!
regs Ole Mugaas

Thanks for your answers!
As I can see from the Krawcyk blog, he is only using one node and maybe that's why he don't have to use keyField. We have also come to the conclusion that we have to use keyfield, but then we have to give the fields out own values. This is not good enough since the values are predefined. Creating a "placeholder" in each data type would not be a good answer because then our customers have to send an additional field in the file which would cause a lot of work.
Do you know how this can be solved with the keyfield? Is it possible to create a keyField and give it a value that is already there, ex:
Invoice.keyFieldValue = Invoicenumber (where Invoicenumber is a field specified in the DT) ?
regards Ole

Oracle RAC one node

why Oracle introduced Oracle RAC one node in 11gR2?
I have gone through oracle documents on oracle rac one node, but i couldn't find much added advantage than instance failover. We have already some technologies like datagaurd and some third party softwares for instance failover.
Then why oracle introduced this RAC one node in the new release i.e 11gR2?
What exactly oracle wants to provide from oracle RAC one node?
Thanks...
Bharath

Why RAC one node?
Oracle RAC one node is a single instance of Oracle RAC that runs on the node in a cluster. The benefit of the RAC one node option is that it allows you to consolidate many databases into one cluster without a lot of overhead, while also providing high availbilty benefits of failover protection, as well as for Online rolling patch application and rolling upgrades for the Oracle clusterware.
Another aspect of RAC one node allows you to limit th CPU utilization of individual database instances within the cluster through a feature called resource manager instance caging, which gives you the ability to dynamilcally change the limit as required.
Furhtermore , with RAC one node there is no limitation for server scalabilty such that if applications outgrow the current resources than a single node can supply, you can then upgrade the applications online to Oracle RAC.
In tthe event that the node which is runnig Oracle RAc one node becomes saturated and out of resources, you can migrate the instance to another node in the cluster using Oracle rac one node and another new utilty called OMOTION feature.OMOTION feature for Oracle RAC 11g R2 rac allows you to migrate a running instance to another server without downtime or distrubtion in service for your enviornment.
Hope you're understand.

Oracle Applications 11i Load Balancing does not work with RAC one Node

Hi all,
Could you help me to resolve this issue.
Architecture environment is :
- One APPS tier node
- Two nodes Oracle Database Appliance (Primary node 1 holds INSTANCE_1 et Secondary node is configurured to holds INSTANCE_2), i.e RAC one Node.
- The primary node have instance_name SIGM_1 and the secondary node have instance_name SIGM_2, but in RAC one node, the secondary instance is not alive.
We convert our EBS 11i environment to RAC following note ID Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 11i [ID 823586.1].
When testing Database failover, Oracle Applications 11i load balancing does not work anymore.
The root cause is that, when the primary node of the Rac one node is down, the INSTANCE_NAME_1 is automaically relocating to the surviving node,.
During test failover, we imagine that when the primary node goes down, the secondary node start or relocate database with instance_name SIGM_2, and in that case the Oracle Applications load balancing works.
Currently, when the primary node goes down, the instance_name SIGM_1 is relocated on the secondary node, which cause failure of Oracle Applications Load Balancing.
Thank you for your advice.
Moussa

This is something I observed a long time ago for Safari (ie: around version 1). I'm not sure this is Safari, per se, but OpenSSL that is responsible for the behavior. I'm pretty sure Chrome does this and I've seen some Linux browsers do it.
What I have done at the last two companies I've worked for is recommend that our clients do not use SSL SessionID as the way of tracking sticky sessions on web servers, but instead using IP address. This works in nearly all cases and has few downsides. The other solution is to use some sort of session sharing on your web servers to mitigate the issue (which also means that your web servers aren't a point of failure for your users' sessions). (One of the products I supported had no session information stored on the web servers, so we could safely round-robin requests, the other product could be implemented with a Session State Server... but in most cases we just used IP address to load balance with). The other solution is to configure your load balancer to terminate the SSL tunnel. You get some other benefits from this, such as allowing your load balancer to reduce the number of actual connections to the web servers. I've seen many devices setup this way.
One thing to consider through this is that - due to the way internet standards work - this really can't be termed a bug on anyone's part. There is no guarantee in the SSL/TLS standards that a client will return the same SSL Session ID for each request and there is not requirement that subsequent requests will even use the same tunnel. Remember, HTTP is a stateless protocol. Each request is considered a new request by the web server and everything else is just trickery to try and get it to work the way you want. You can be annoyed at Safari's behavior, but it's been this way for over 5 years by my count, so I don't expect it to change.

Xsl for removing specific nodes and modifying one node.

Hello,
i have the urgent need to remove specific nodes
and modify one node in my XML.
the xml as input :
<?xml version="1.0" encoding="utf-8"?>
<PLOT>
<REQUEST>
<GET_LAYOUT>
<PROPERTIES>
<MAPNAME name="xxxx" />
</PROPERTIES>
<DATAFRAME id="MAIN">
<LAYERLIST>
<LAYERDEF id="0" visible="false" query="" />
<LAYERDEF id="1" visible="false" query="" />
<LAYERDEF id="2" visible="false" query="" />
<LAYERDEF id="3" visible="false" query="" />
<LAYERDEF id="4" visible="false" query="" />
<LAYERDEF id="5" visible="false" query="" />
<LAYERDEF id="6" visible="false" query="" />
<LAYERDEF id="7" visible="false" query="" />
<LAYERDEF id="8" visible="false" query="" />
<LAYERDEF id="9" visible="false" query="" />
<LAYERDEF id="10" visible="false" query="" />
</LAYERLIST>
<MAPSERVICELIST>
<MAPSERVICEDEF service="BASEMAP" >
<LAYERLIST>
<LAYERDEF id="2" visible="True" query="" />
<LAYERDEF id="1" visible="False" query="" />
</LAYERLIST>
</MAPSERVICEDEF>
<MAPSERVICEDEF service="MAP1">
<LAYERLIST>
<LAYERDEF id="4" visible="True" query="" />
<LAYERDEF id="3" visible="True" query="" />
<LAYERDEF id="2" visible="True" query="" />
<LAYERDEF id="1" visible="False" query="" />
</LAYERLIST>
</MAPSERVICEDEF>
</MAPSERVICELIST>
</DATAFRAME>
</GET_LAYOUT>
</REQUEST>
</PLOT>
what i want to have is:
<?xml version="1.0" encoding="utf-8"?>
<PLOT>
<REQUEST>
<GET_LAYOUT>
<PROPERTIES>
<MAPNAME name="xxxx" />
</PROPERTIES>
<DATAFRAME id="MAIN">
<LAYERLIST>
<LAYERDEF id="6" visible="True" query="" />
<LAYERDEF id="5" visible="True" query="" />
<LAYERDEF id="4" visible="True" query="" />
<LAYERDEF id="3" visible="False" query="" />
<LAYERDEF id="2" visible="True" query="" />
<LAYERDEF id="1" visible="False" query="" />
</LAYERLIST>
<MAPSERVICELIST/>
</DATAFRAME>
</GET_LAYOUT>
</REQUEST>
</PLOT>
as you see, <MAPSERVICELIST/> is empty and <LAYERLIST> contains all <LAYERDEF> of <MAPSERVICEDEF>/<LAYERLIST>
The ones of BASEMAP are kept unchanged but the ones of MAP1 are having a new attribute value for id.
Thanks four your help.
Regards.

You can implement very straightforward map in BizTalk like below:
If you are interested in XSLT of this map, I copied below which visual studio gave me when i validated the map:
<?xml version="1.0" encoding="UTF-16"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:var="http://schemas.microsoft.com/BizTalk/2003/var" exclude-result-prefixes="msxsl var" version="1.0">
<xsl:output omit-xml-declaration="yes" method="xml" version="1.0" />
<xsl:template match="/">
<xsl:apply-templates select="/PLOT" />
</xsl:template>
<xsl:template match="/PLOT">
<PLOT>
<REQUEST>
<GET_LAYOUT>
<PROPERTIES>
<MAPNAME>
<xsl:if test="REQUEST/GET_LAYOUT/PROPERTIES/MAPNAME/@name">
<xsl:attribute name="name">
<xsl:value-of select="REQUEST/GET_LAYOUT/PROPERTIES/MAPNAME/@name" />
</xsl:attribute>
</xsl:if>
<xsl:value-of select="REQUEST/GET_LAYOUT/PROPERTIES/MAPNAME/text()" />
</MAPNAME>
<xsl:value-of select="REQUEST/GET_LAYOUT/PROPERTIES/text()" />
</PROPERTIES>
<DATAFRAME>
<xsl:if test="REQUEST/GET_LAYOUT/DATAFRAME/@id">
<xsl:attribute name="id">
<xsl:value-of select="REQUEST/GET_LAYOUT/DATAFRAME/@id" />
</xsl:attribute>
</xsl:if>
<LAYERLIST>
<xsl:for-each select="REQUEST/GET_LAYOUT/DATAFRAME/MAPSERVICELIST/MAPSERVICEDEF">
<xsl:for-each select="LAYERLIST/LAYERDEF">
<LAYERDEF>
<xsl:if test="../../../../LAYERLIST/LAYERDEF/@id">
<xsl:attribute name="id">
<xsl:value-of select="../../../../LAYERLIST/LAYERDEF/@id" />
</xsl:attribute>
</xsl:if>
<xsl:if test="@id">
<xsl:attribute name="id">
<xsl:value-of select="@id" />
</xsl:attribute>
</xsl:if>
<xsl:if test="../../../../LAYERLIST/LAYERDEF/@visible">
<xsl:attribute name="visible">
<xsl:value-of select="../../../../LAYERLIST/LAYERDEF/@visible" />
</xsl:attribute>
</xsl:if>
<xsl:if test="@visible">
<xsl:attribute name="visible">
<xsl:value-of select="@visible" />
</xsl:attribute>
</xsl:if>
<xsl:if test="../../../../LAYERLIST/LAYERDEF/@query">
<xsl:attribute name="query">
<xsl:value-of select="../../../../LAYERLIST/LAYERDEF/@query" />
</xsl:attribute>
</xsl:if>
<xsl:if test="@query">
<xsl:attribute name="query">
<xsl:value-of select="@query" />
</xsl:attribute>
</xsl:if>
</LAYERDEF>
</xsl:for-each>
</xsl:for-each>
<xsl:value-of select="REQUEST/GET_LAYOUT/DATAFRAME/LAYERLIST/text()" />
</LAYERLIST>
<MAPSERVICELIST>
<xsl:text> </xsl:text>
</MAPSERVICELIST>
<xsl:value-of select="REQUEST/GET_LAYOUT/DATAFRAME/text()" />
</DATAFRAME>
<xsl:value-of select="REQUEST/GET_LAYOUT/text()" />
</GET_LAYOUT>
<xsl:value-of select="REQUEST/text()" />
</REQUEST>
</PLOT>
</xsl:template>
</xsl:stylesheet>
You can highlight the issue if you have any specific one.
Please mark it as Answer if this answers your question
Thanks.
Mo
The contents I write here is my personal views, not the view of my employer and anyone else.

"ORA-19025 EXTRACTVALUE returns value of only one node" - Suggestion

ORA-19025 EXTRACTVALUE returns value of only one node
When this error occurs, would you please provide some or all of the following information:
(1) row number
(2) row id
(3) the name of the offending column
(5) the XQuery expression
(6) the node name
(7) the text value being parsed, in which an excess node was found
and would you consider processing every good row, assuming it may be correct,
because, in 13 thousand lines generated by my view, there is unlikely to even one more row in error.
Thank you,
Mike Rainville
FYI,
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP and Data Mining options
ojdbc6.jar 11.1.0.7.0

Thanks for the suggestion...
The problem is that in one row, information in a data dump about two different things was combined into one, due to a gap in the input file. The starting delimiter for the second thing and the ending delimiter for the first were missing. The result was that many entity tags that should have been unique were duplicated, ion that particular row.
I was able to guard the view against future such errors with occurrences using this
in the WHERE clause ...
AND NOT ( XMLCLOB LIKE '%<TAG1>%<TAG1>%'
OR XMLCLOB LIKE '%<TAG2>%<TAG2>%'
OR XMLCLOB LIKE '%<TAG3>%<TAG3>%'
/* ... Repeated once for each tag used with extractvalue */
OR XMLCLOB LIKE '%<TAGN>%<TAGN>%'
It filters out any row with two identical starting tags, where one is expected.
I am pleased to see that the suggestion got through.

Can I run more than one Node Manager per machine?

Hia,
We have a situation in our project where we need to run different domains on a Solaris machine in different java modes.
Say Domain1 should be running in 32bit version of java where as Domain2 should be running in 64bit mode due to the nature of testing currently going on in different domains.
We could successfully get the two domains running in different java modes in parallel by modifying the start scripts to decide which Sud data model to start the servers based on certain parms. However, the pain here is with the Node Manager.
My understanding is that there should be one Node Manager running per machine for all the domains running on that machine. So when ever I have to run a domain in a java mode different to that of what Node Manager is running on, I had to kill the node manager and start it in the same version that I want to start the other servers in since Node Manager uses its starting parms internally to start the Managed Servers (Note: there is no issue in running the Admin Server regardless of the node manager mode as expected).
Can somebody advise me if there is any way to get around this hassle?
I want to know if we can run more than one node manager per machine.
Below are the details of my env.
Weblogic Server 10.3
Solaris 10 SPARC 64 bit (SunOS 5.10 Generic_142900-14 sun4v sparc)
java version "1.6.0_20"
Hope all this makes sense...
Cheers,
Satish.
Edited by: apsnaidu on Mar 15, 2013 3:29 PM

You can run as many node manager as you want in a particular machine.
At the time of starting the node manager you need to pass hostname & Port.
This will start the nodemanager on different ports of a machine.
sh startNodeManager.sh <hostname> <port>
eg:- sh startNodeManager.sh dev_machine_01 5556
sh startNodeManager.sh dev_machine_01 5557
sh startNodeManager.sh dev_machine_01 5558
After starting your node manager in different ports you need to change machine details from admin console.

How to map the node which i have created dynamically into the view

Hi All,
Many thanks to all ur answers in advance.
I have created a node dynamically.I want to display the fields which i have fetched in that node.
i dont know how to map the node which i have created dynamically into the layout of the view.
Other than Using ALV is there any other way to do.
for example usin table control

Hi,
use the reference variable of view to access the corresponding UI element and then use the method of that UI element to do data binding with context node.
for ex:
Context node = flights
element = inputfield, ID = inp_name
data view type ref to if_wd_view.
data lr_inp type ref to cl_wd_input_field.
lr_inp ?= view->get_child_element( ' INP_NAME' ).
use following methods of input field to define the data binding.
SET__DDIC_BINDING( )
BOUND__PROPERTY( ).
BOUND__PRIMARY_PROPERTY( ). " for input field it is value property.
Get the reference of view from wddomodifyview method as importing parameter(view). Store this parameter as controller attribute.
Thanks,
Rahul

How to read the content in one node of XML in Java? Pls help

My dear brothers,
I am a newbie of XML, I have a exercise which is creating a Tree View from XML file. But the trouble is I do not know how to read the content in one node of XML file. I decide to use the algorithm as following:
1. Create a GUI form which gives the ability for user to choose a XML file (ok)
2. Load XML and return the file (ok)
3. Read the file from node to node to create the node in Tree View (?!)
Please help me, and if you are enough kind, please give me an small example to easy understand. Thanks in advance.
Hoang Yen Binh

I hope this one helps you.
     <ABC Type="ProductBased" ProdName="One" Location="India">
          <CEO>Raj</CEO>
          <Finance>Vikram</Finance>
          <HR>Karthik</HR>
          <Technical>Satish</Technical>
     </ABC>
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Attr;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.DOMException;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
public class XmlReading {
     Document doc;
     Element element;
     public static void main(String[] args) throws Exception{
          XmlReading xr = new XmlReading();
          xr.getXmlParser(args);
     public void getXmlParser(String[] args) {
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
               if(args.length != 1) {
                    System.err.println("Argument Required");
          try {
               DocumentBuilder builder = factory.newDocumentBuilder();
               doc = builder.parse(new File(args[0]));
          }catch(ParserConfigurationException e1) {
          }catch(SAXException e2) {
          }catch(IOException e3) {
          getAttributes();
     public void getAttributes() {
          // Retrive the entire Document from the Dom Tree
          element = doc.getDocumentElement();
//          System.out.println(element);
          NamedNodeMap attrs = element.getAttributes();
          // Get number of attributes in the element
     int numAttrs = attrs.getLength();
     // Process each attribute
          for (int i=0; i<numAttrs; i++) {
               Node node = attrs.item(i);
               // Get attribute name and value
               String attrName = node.getNodeName();
               String attrValue = node.getNodeValue();
               System.out.println(attrName + ": " + attrValue);
          String s1 = element.getTagName();
          System.out.println(s1);
          // To get all the elements in a DOM Tree
          NodeList nl1 = element.getElementsByTagName("*");
          int i2 = nl1.getLength();
          System.out.println(i2);
          for(int i=0; i<i2; i++) {
               System.out.println(nl1.item(i) + "\n");
}

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