Hi Jeremy,
Since it's part of the introspector, normally it shouldn't matter
whether it's unmarshalling or marshaller. Try it with a non-date type.
Date handling in Castor has some special test cases which might be
getting in the way, in which case I'll need to obviously place priority
on a user-specified handling.
--Keith
Jeremy Haile wrote:
>
> Keith,
>
> Should the FieldHandlerFactory method also work for the Marshaller? When
> I test it, the only method that gets called on my FieldHandlerFactory is
> getSupportedTypes. Currently my getSupportedTypes is just:
>
> public Class[] getSupportedTypes() {
> System.out.println( "getSupportedTypes()" );
> return new Class[] { GregorianCalendar.class } ;
> }
>
> However, when I marshall the document, no other methods are called and I
> still get output such as:
>
> "password-last-changed-ts="java.util.GregorianCalendar[time=10753234......."
>
> Any ideas? Will this be incorporated by the next release? I really like
> the FieldHandlerFactory technique much better than specifying a handler
> for each field in your mapping..
>
> Jeremy
>
> On Wed, 28 Jan 2004 13:01:40 -0600, "Keith Visco" <[EMAIL PROTECTED]>
> said:
> >
> > Hi Jeremy,
> >
> > I recall the discussion, though the problem obviously still exists if
> > you are running into it. You might want to file a bug on that
> > (http://bugzilla.exolab.org).
> >
> > There is an "undocumented" workaround for anyone using the CVS version,
> > it's the ability to set a GeneralizedFieldHandler for a specific type
> > and not only for a specific field:
> >
> > 1. Implement org.exolab.castor.mapping.FieldHandlerFactory
> >
> > This factory should return your GeneralizedFieldHandler for
> > the InetAddress class.
> >
> > 2. Remove the GeneralizedFieldHandler reference from the mapping file.
> > Leave the <field> mapping, just remove the handler="myHandler".
> >
> > 3. Set the FieldHandlerFactory in the introspector as such:
> >
> > import org.exolab.castor.xml.ClassDescriptorResolver;
> > import org.exolab.castor.xml.Introspector;
> > import org.exolab.castor.xml.util.ClassDescriptorResolverImpl;
> >
> >
> > ClassDescriptorResolverImpl cdr = new ClassDescriptorResolverImpl();
> > cdr.getIntrospector().addFieldHandlerFactory(myFactory);
> >
> > 4. Now use this ClassDescriptorResolver in the Unmarshaller and
> > Unmarshal:
> >
> >
> > Unmarshaller unm = new Unmarshaller(...);
> > unm.setResolver(cdr);
> > Object root = unm.unmarshal(reader);
> >
> > Hope that helps,
> >
> > --Keith
> >
> >
> >
> > Jeremy Haile wrote:
> > >
> > > I'm new to the list, so I hope I'm not rehashing a question that has been
> > > discussed recently. I looked in the mail archives and only found posts
> > > up to March of last year discussing using GeneralizedFieldHandler with
> > > Collections. It seems that the strange behavior when using a
> > > GeneralizedFieldHandler with collections is still present.
> > >
> > > My needs are similar to those of the old "URL" post. In short, I am
> > > trying to marshall and unmarshall a Set of java.net.InetAddress objects.
> > > I want to marshall them into a java.lang.String via the
> > > InetAddress.getHostName() method. My generalized field handler receives
> > > an enumeration of InetAddress objects in convertUponGet() while
> > > marshalling. I simply convert this to a set of java.lang.String objects
> > > and return it. This works as expected.
> > >
> > > However, it is odd that when unmarshalling, convertUponSet() gets called
> > > for each element in the collection instead of with an enumeration - fine,
> > > I can deal with that. But why does convertUponGet() get called while I
> > > am unmarshalling. Has this not been fixed in 0.9.5.2? How should I be
> > > handling this situation?
> > >
> > > Relevant code is below. Note that my code fails during unmarshalling
> > > when convertUponGet() is called. If I comment out my convertUponGet() my
> > > code functions (I could probably develop a workaround), but I figured
> > > that Castor should have a defined, working way of dealing with this
> > > situation.
> > >
> > > Thanks!
> > >
> > > Running in Redhat Linux, JDK 1.4.2_03, Castor 0.9.5.2
> > >
> > > -==MAPPING==-
> > >
> > > <field name="ipAddresses"
> > > type="java.lang.String"
> > > handler="com.company.module.support.InetAddressFieldHandler"
> > > get-method="getIpAddresses"
> > > set-method="setIpAddresses"
> > > collection="set">
> > > <bind-xml name="ip-address"
> > > node="element" />
> > > </field>
> > >
> > > -==FIELD HANDLER==-
> > > /**
> > > * Used for marshalling of a collection of InetAddresses by
> > > converting them
> > > * into a set of strings that represents their hostnames.
> > > * <p>
> > > * This method uses the [EMAIL PROTECTED] InetAddress#getHostAddress} method
> > > to
> > > * convert the InetAddress object into a string form.
> > > *
> > > * @param o the InetAddress object to convert
> > > *
> > > * @return a String encoding of the InetAddress object
> > > */
> > > public Object convertUponGet(Object o) {
> > >
> > > if( o == null )
> > > return null;
> > >
> > > // Create new set to hold ip addresses that are marshalled
> > > Set addressSet = new HashSet();
> > >
> > > // Loop through each value given by castor and convert to a
> > > string.
> > > // The string will be stored in the new set and returned to
> > > castor
> > > // to be marshalled in the XML file.
> > > Enumeration enum = (Enumeration) o;
> > > while ( enum.hasMoreElements() ) {
> > > InetAddress address = (InetAddress)enum.nextElement();
> > >
> > > // Add address host name to the address collection
> > > addressSet.add( address.getHostName() );
> > > }
> > >
> > > return addressSet;
> > > }
> > >
> > > /**
> > > * Unmarshalls a set of String IP Addresses into a set of InetAddress
> > > * objects.
> > > * <p>
> > > * The IP address is expected to be formatted in a way accepted by
> > > * [EMAIL PROTECTED] InetAddress#getByName(String)}.
> > > *
> > > *
> > > * @param o the String encoding of a InetAddress object
> > > *
> > > * @return the newly create java.util.InetAddress object
> > > */
> > > public Object convertUponSet(Object o) {
> > >
> > > if( o == null )
> > > return null;
> > >
> > > String hostName = (String) o;
> > > InetAddress inetAddress = null;
> > >
> > > try {
> > >
> > > // convert string into an inet address object
> > > inetAddress = InetAddress.getByName( hostName );
> > >
> > > } catch (UnknownHostException e) {
> > >
> > > // Castor doesn't allow us to throw exceptions in this class,
> > > so
> > > // a runtime exception is thrown as this is a fatal error...
> > > //todo Create a more elegant error reporting mechanism for
> > > field support
> > > throw new RuntimeException( "Host name is not a legal value:
> > > '" + hostName + "'" );
> > > }
> > >
> > > return inetAddress;
> > > }
> > >
> > > --
> > > Jeremy Haile
> > > [EMAIL PROTECTED]
> > >
> >
> > -----------------------------------------------------------
> > If you wish to unsubscribe from this mailing, send mail to
> > [EMAIL PROTECTED] with a subject of:
> > unsubscribe castor-dev
> >
> --
> Jeremy Haile
> [EMAIL PROTECTED]
>
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