JAXB: Nillable elements present in mashalled output

Hi!
I'm using JAXB to generate java objects and marshal them into XML.
My schema contains various elements declared as nillable:
<xs:element name="element1" type="xs:string" nillable="true">
<xs:element name="element2" type="xs:string" nillable="true">
<xs:element name="element3" type="xs:string" nillable="true">
When I try to marshal the corresponding object using JAXB API I get the following XML:
<element1 ns1:nil="true" xmlns:ns1="http://www.w3.org/2001/XMLSchema-instance"/>
<element2 ns2:nil="true" xmlns:ns2="http://www.w3.org/2001/XMLSchema-instance"/>
<element3>ABCD</element3>
Is there anyway I can get the output with onely element3 and suppress the null values of element1 and element2 from the output XML so that it only looks like:
<element3>ABCD</element3>
Any help will be really appreciated!
- Raj

Instaed nillable=true in schema please use minOccurs=0 JAXB will take care of it then. When you specify nillable=true it implements that the element is requred but it can be null so for the jaxb to not generate those field you need to change the schema to minOccurs = 0 and if it can appear more than once maxOccurs=unbounded.

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Melanie_Green wrote:
Thank him with duke stars :)The old dangling-dukes problems. While I really don't care about them, I think it's unfair to promise something and then not go along with the promise ...
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<!ELEMENT AnotherElement (C | B)>
<!ELEMENT A(#PCDATA)>
<!ELEMENT C(#PCDATA)>
<!ELEMENT B (x,y,z)>
<!ELEMENT x(#PCDATA)>
<!ELEMENT y(#PCDATA)>
<!ELEMENT z(#PCDATA)>
And assume default binding schema.
I wrote a XML file based on the dtd and a java app to access the data.
The XML file
<SomeElement>
<A>Some Sentence</A>

<x>1</x>
<y>2</y>
<z>3</z>

</SomeElement>
<AnotherElement>
<C>123</C>
</AnotherElement>
During unmarshalling, it throws an UnrecognisedElementNameException: x
It seems that it cannot recognised element x, y and z.
I am pretty sure I have it defined in the dtd file so why is it complaining?
Can anyone shed some light on this for me?
Thanks

Let me attached the files. Perhaps that will ilustrate the problem better.
The dtd file
<!ELEMENT test (precondition, step+)>
<!ELEMENT precondition (description, include?)>
<!ELEMENT step (input|include)>
<!ELEMENT input (#PCDATA)>
<!ELEMENT include (testcaseid, scenarioid, (from, to?)?)>
<!ELEMENT description (#PCDATA)>
<!ELEMENT testcaseid (#PCDATA)>
<!ELEMENT scenarioid (#PCDATA)>
<!ELEMENT from (#PCDATA)>
<!ELEMENT to (#PCDATA)>
The xml file
<?xml version="1.0"?>
<!DOCTYPE test SYSTEM "abc.dtd">
<test>
<precondition>
<description>NONE</description>
</precondition>
<step>
<include>
<testcaseid>TID</testcaseid>
<scenarioid>SID</scenarioid>
<from>F</from>
<to>T</to>
</include>
</step>
</test>
The application file
import java.util.*;
import java.io.*;
import javax.xml.bind.*;
import javax.xml.marshal.*;
public class testABC {
/** Creates new testABC */
public testABC() {
* @param args the command line arguments
public static void main (String args[]) {
try{
File sFile = new File("abcfile.xml");
FileInputStream sis = new FileInputStream(sFile);
try{
Test t = Test.unmarshal(sis);
System.out.println("Completed");
}finally{
sis.close();
}catch(Exception e){
e.printStackTrace();
Assume default schema binding
The error:
Cannot recognised the element testcaseid when try to unmarshall include element
Thanks :-)

To know how to add the elements present in the particular column

I have created the ALV report with two columns namely vbeln and ntgew.In that i want to add the values of ntgew column.plz provide the query to do that.
Edited by: Philip Eller on Jun 18, 2008 9:12 AM

hi vivek,
You posted the question in wrong forum.
There is a forum seperately for ABAP.
Jeyakanthan

JAXB: Nillable elements present in mashalled output

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