John, Ah ok...yes Castor will not marshal null values.
The problem is how to differential between Null and empty. For example: String foo = ""; is different than String foo = null; Castor will marshal the first value as <foo/> The second value will not get marshalled. Currently there is no way to treat null values as the same as empty values. --Keith "Goyer, John" wrote: > > 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 ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev
