Keith, Thanks for the quick response. Actually I did have the "extends" attrib in there correctly; I screwed up in cutting and pasting.
It turns out that the attribute wasn't appearing because if it is null, Castor ignores it. I would like empty tags to appear for nulls -- can this be done? Thanks, John Goyer -----Original Message----- From: Keith Visco [mailto:[EMAIL PROTECTED] Sent: Monday, September 08, 2003 5:06 PM To: [EMAIL PROTECTED] Subject: Re: [castor-dev] XML Mapping of Subclass? Hi John, You need to specify the extends attribute on the class mapping as such: <class name="example.Lodging" extends="example.Option" auto-complete="false"> <field name="lodgeType" type="integer"></field> </class> --Keith "Goyer, John" wrote: > > I have a simple class hierarchy. > > Class Option { protected String optionPk; } > > Class LodgingOption extends Option { protected int lodgeType; etc... } > > I can serialize B to XML using Castor, but it will not include the > data members inherited from A. Is this a limitation of > Castor? I have tried the following mappng file. It has no effect. > The file below simply produces an XML doc with the lodgeType but > nothing more. Code is below the map file. Thanks! > > <?xml version="1.0"?> > <!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Object Mapping DTD Version > 1.0//EN" > "http://castor.exolab.org/mapping.dtd";> > > <mapping> > > <description> > Maps a Lodging instance to an XML representation. > </description> > > <class name="example.Option"> > <field name="optionPk"></field> > </class> > > <class name="example.Lodging" > auto-complete="false" name="example.Option"> > <field name="lodgeType"></field> > </class> > > </mapping> > > ------- Code ------------------------------------------------------------- > > public String toXML( Object obj ) throws MarshalException, > ValidationException { > > // init(); > // StringWriter sw = new StringWriter(); > // Marshaller.marshal( obj, sw ); > // return sw.toString(); > // > init(); > StringWriter sw = new StringWriter(); > Marshaller m = null; > try { > > Mapping mapping = new Mapping(); > mapping.loadMapping( baseDir + mapDir + > "Lodging.castormap.xml"); > > m = new Marshaller(sw); > m.setMapping( mapping ); > > } catch (IOException e) { > // TODO Auto-generated catch block > e.printStackTrace(); > } catch (MappingException e) { > // TODO Auto-generated catch block > e.printStackTrace(); > } > m.marshal( obj ); > > return sw.toString(); > > } > > ----------------------------------------------------------- > If you wish to unsubscribe from this mailing, send mail to > [EMAIL PROTECTED] with a subject of: > unsubscribe castor-dev ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev
