Castor Unmarshalling Problem

Question

Hi,
am using Castor to unmarshall XML to java objects.
Am facing a problem here. Say my XML to be unmarshalled is:
<Main>
<Students Name="Science">
<Student>
<Name>Tom</Name>
<Roll>1</Roll>
<Hobby>music</Music>
</Student>
<Student>
<Name>Dick</Name>
<Roll>2</Roll>
<Hobby>sports</Hobby>
</Student>
<Student>
<Name>Stella</Name>
<Roll>3</Roll>
</Student>
</Students>
</Main>
Please notice, in the above XML, <Hobby> subelement is missing in the 3rd as it is marked aptional in the XML DTD.
After unmarshalling this XML document using the below mentioned mapping ...i am getting this <Hobby> element's content as that of the immediate prceeding <Student> element's <Hobby> element, i.e "Sports"..whereas i want it to be blank.
Please mention whether i need to make any modification in this mapping XML or not.
<?xml version="1.0"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Object Mapping DTD Version 1.0//EN" "http://castor.exolab.org/mapping.dtd">
<mapping>
<description>mapping file</description>
<class name="Student">
<map-to xml="Student"/>
<field name="Name" type="string" />
<field name="Roll" type="string" />
<field name="Hobby" type="string" />
</class>
<class name="Students">
<map-to xml="Students"/>
<field name="Name" type="string" >
<bind-xml name="Name" node="attribute" />
</field>
<field name="Student" get-method="getStudentList" set-method="setStudentList" type="Student" collection="collection" />
</class>
<class name="Main">
<map-to xml="Main"/>
<field name="Students" get-method="getStudentsList" set-method="setStudentsList" type="Students" collection="collection"/>
</class>
</mapping>

Answer 1

Ehem.. perhaps I should try InputSource before discarding it as useless. The problem solved itself :-)