RE: [TM4J-users] TM4Web/Velocity 0.2rc1 supports Hibernatebackends?

[Conal T. <Con...@vu...>]

Kal Ahmed wrote:

> I've checked in some changes for the TM4Web/Velocity package which
> provides a basic level of support for listing the topic maps in a
> database. You need a configuration like this:
>=20
> <provider name=3D"hibernate"=20
> factory=3D"org.tm4j.topicmap.hibernate.TopicMapProviderFactoryImpl">
>     <provider-properties>
>       <property name=3D"hibernate.connection.url"=20
> value=3D"jdbc:mysql://localhost/tm4mail"/>
>       <property name=3D"hibernate.connection.username" value=3D"***"/>
>       <property name=3D"hibernate.connection.password" value=3D"***"/>
>       <property name=3D"hibernate.dialect"=20
> value=3D"net.sf.hibernate.dialect.MySQLDialect"/>
>       <property name=3D"hibernate.connection.driver_class"=20
> value=3D"com.mysql.jdbc.Driver"/>
>     </provider-properties>  =20
>     <topicmaps template=3D"topicmap.vm"/>
>   </provider>
>=20
> Note the extra <topicmaps/> element that is required. The template
> attribute specifies the template to be used for the main=20
> topicmap page.
> With this update, you are forced to always use topic.vm to render
> topics, but I will work on adding support like you have in the normal
> <topicmap> element to specify the template(s) to use to render topics.

It's only vaguely related to Kal's post, but I thought I'd mention:

I haven't used the velocity templating engine, but I have used Cocoon to =
do templating. I've used Cocoon's JXTemplateGenerator, which is rather =
like XSLT with JXPath instead of XPath. JXPath gives you path-based =
access to Java object-graphs, e.g. x.getFoo().getBar() =3D> "x/foo/bar". =
So this is similar to Velocity, and similarly I have templates =
associated with various topic map objects.=20

I am keeping references to the individual JXTemplate files in the actual =
topic map, where they appear as occurrences of class topics. I had =
considered keeping a list of templates associated with different topics =
when I realised that this is what topic maps are for :-) I don't have a =
very sophisticated setup yet, but it does seem to me that referring to =
templates in the map itself is potentially a powerful technique. How =
does it work with the Velocity integration? Can you attach Velocity =
templates to particular classes of topics, for instance?