Re: [castor-user] - Castor and Java annotations

Mon, 09 May 2011 07:21:01 -0700 

Hi Werner,

answers below:

*João Antunes*
MsC in Communication Networks Engineering <https://fenix.ist.utl.pt/cursos/merc?locale=en_EN> at IST <http://www.ist.utl.pt/en/about-IST/>
Web: http://web.ist.utl.pt/~joao.a.p.antunes <http://web.ist.utl.pt/%7Ejoao.a.p.antunes> 

E-mail: [email protected] <mailto:[email protected]>

LinkedIn: http://pt.linkedin.com/in/joaoapantunes
*Instituto Superior Técnico - Centro de Informática/Direcção de Serviços de Informação* 

Software Engineer - FénixEDU team


*Proud associate of **G3SI* <http://g3si.netai.net/index.php?lang=en>


Em 09/05/11 14:31, Werner Guttmann escreveu:

Hi Joao,

On 09.05.2011 09:05, João Antunes wrote:

Hello!

First of all, thanks for the contribute given to the O.S. community that
the castor lib represents; also, please accept my apologies if an answer
for this question already exists, meaning that I didn't search
thoroughly enough for it.

I was wondering if I can use Castor to map Annotations in fields/methods
in Java to translate into XML location elements or XML attributes,

No, it does not have support for XML annotations. There used to be
active development on providing support for JAXB annotations, but that
died off ... and to my knowledge is not finished.


e.g.:
--
Java file:
[...]
Class YPTO {
@XPTOAnnotation{ yada }
private String stringToPersist;
public String getStringToPersist() {
[...]

into
XML File:
<YPTO>
<stringToPersist XPTOAnnotation=yada>contentofthestring</stringToPersist>
[...]
or alternatively:

<YPTO>
<XPTOAnnotation yada>
<stringToPersist>contentofthestring</stringToPersist>
[or]
<YPTO>
<XPTOAnnotation>
<yada>  <!-- Or even without the YADA, I really don't need the details of
the annotations -->
<stringToPersist>contentofthestring</stringToPersist>
[...]

--

As I could understand, the field element in the XML Mapping does not
support the annotations. Is there any plugin/element that I missed to
implement this?

No, you have not missed anything.


My end goal is to generate XHTML using XML which came from a JavaBean,
the idea is to make a generic XSLT (or DVSL, whichever is easier [ I
guess DSVL<http://velocity.apache.org/dvsl/devel/>  will be easier, also
if anyone has any comment about this, feel free to give a hint :)]) that
will pickup on the hints provided on the bean on the form of annotations
(I will use annotations because I guess that is the way to go here, but
I can go with something else if it's easier to implement ) to render the
XHTML using a predetermined  'XHTML template'.

In case a plugin doesn't exist, any info on how I should do this?
writing a plugin/patch to the lib to implement this behaviour might be
what I end up doing, ...

Hmm, why not invest the time in trying to finish the support for the
JAXB annotations ?

I guess that's not the answer you've been looking for (at least not
precisely), but let's see what you think of my answers.
Because I'm not sure that JAXB annotations are what I need. Actually I just checked them and I think it wouldn't solve the problem I have. Also, quite bluntly speaking, I have a full stack of projects to work on, unfortunately even my O.S. library is being neglected ATM, so, sorry, no time for that.
It seems that the way for me to go is to use Castor marshaller and then get all of the annotations of the class and iterate through the XML DOM to add the XML attributes. I'll post the solution as soon as I have implemented it for whomever who might be interested in doing something similar and runs into this thread. 

Cheers,
João

Cheers
Werner


as long as it's less time consuming than the
alternative which is to define a XSD and use JAXB and a generic
algorithm to interpret beans [which castor already does] and its
annotations [which is what it would be perfect if castor already did
had  :)].

Thanks in advance,
João Antunes


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