Hi,
Creating XML such as ...
<LEVEL-1>
<LEVEL-2>
<LEVEL-3/>
</LEVEL-2>
</LEVEL-1>
Does not really make sense if the underlying XML artefact (the element <str>)
will not be created as a result of marshalling. By default, if the instance
value of the String property 'str' equals to 'null', Castor will not marshal
the element at all (unless you make the element required and nillable, in which
case it will marshall an empty element <str/> within the location given).
I guess it is important to to acknowledge that the XPATH specified within a
location attribute is a prefix only, and as such follows the default rules of
marshalling instance members (incl. Dealing with nulls). In other words, if the
instance member will not be marshalled, the prefix won't be marshalled either.
Having said that, you do not have to use a location attribute, even though it
is very convenient, as it allows you to work with shortcuts. As this mechanism
does not work for your scenario, why not create classes for <LEVEL-2> and
<LEVEL-3> and map them accordingly ?
Regards
Werner
> -----Original Message-----
> From: pat [mailto:[EMAIL PROTECTED]
> Sent: Montag, 29. Jänner 2007 13:52
> To: Castor Users
> Subject: [castor-user] keeping mapping elements when they are
> not present
>
> Hi all,
>
> I have question about Castor XML mapping.
>
> Introduction:
> public class Clazz {
> private String str;
> public String getStr() {...}
> public void setStr(String str) {...}
> }
>
> Clazz mapping xml fragment:
> <class name="Clazz">
> <map-to xml="LEVEL-1"/>
> <field name="str" type="java.lang.String">
> <bind-xml name="str" node="element"
> location="LEVEL-2/LEVEL-3"/> </field> </class>
>
> Problem:
> When the str field isnot null, then the XML tree structure is
> correct for me:
> <LEVEL-1><LEVEL-2><LEVEL-3><str>...</str></LEVEL-3></LEVEL-2><
> /LEVEL-1>
>
> But when the str field is null, then the structure is collapsed to:
> <LEVEL-1/>
>
> And I need to push Castor to this structure (and best of all
> is to do it with mapping and without coding):
> <LEVEL-1><LEVEL-2><LEVEL-3/></LEVEL-2></LEVEL-1>
>
> How can I do this ???
>
> Thanks a lot for the response.
>
> Pat
>
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