Re: [Andromda-user] Hibernate component and Spring

Tomasz Lempart Thu, 22 Jul 2004 12:18:02 -0700

Hi Chad,

thanks a lot. I have already one cartridge for hibernate (with spring service) and value stereotype seems to work :-)

   Tomek

----- Original Message ----- From: "Tomasz Lempart" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, July 21, 2004 2:41 PM Subject: [Andromda-user] Hibernate component and Spring
Hi all,
   I am impressed with the work of andromda team. I am sure that
andromda can do my job easier :-).
   I want ask you for two things.
   1. I try to extend hibernate cartridge. I need values object in
model, they should be interpreted as hibernate component. First of all I
have tried to add new stereotype (Value) to cartridge (I think it is
better to use ValueObject from java cartridge, but it comes later). I
added to andromda-cartridge.xml template element:
    <template
        sheet="templates/HibernateValue.vsl"
        outputPattern="{0}/{1}.java"
        outlet="values"
        overWrite="true">
        <modelElements variable="class">
            <modelElement stereotype="Value"/>
        </modelElements>
    </template>
   and template to src/templates. When I try to build my project with
my new hibernate cartridge (I use maven) I get such error:
<verbatim>
andromda:run:
    [echo] +--------------------------------------------+
    [echo] |      R u n n i n g    A n d r o M D A      |
    [echo] +--------------------------------------------+
19:59:20,635 INFO  [CartridgeFinder] found cartridge --> 'hibernate'
19:59:20,739 INFO  [CartridgeFinder] found cartridge --> 'spring'
19:59:25,898 INFO  [andromda] Input model -->
'jar:file:/home/tlempart/workspace/BusinessTrip/mda/src/uml/BusinessTrip.xml .zip!/BusinessTrip.xml'
19:59:32,119 INFO  [MetafacadeMappings] found metafacades --> 'default'
19:59:32,991 INFO  [hibernate] Output:
'file:/home/tlempart/workspace/BusinessTrip/mda/../hibernate/target/src/java /pl/sst/businesstrip/model/Role.java'
19:59:33,221 ERROR [DefaultAndroMDACartridge] Error performing
DefaultAndroMDACartridge.processWithTemplate with template
'templates/HibernateEntity.vsl', template context
'[EMAIL PROTECTED],
[EMAIL PROTECTED]' and cartridge
'hibernate'
org.apache.velocity.exception.MethodInvocationException: Invocation of
method 'getColumnName' in  class
org.andromda.metafacades.uml14.EntityAssociationEndFacadeLogicImpl threw
exception class java.lang.ClassCastException : null
        at
org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier. java:193)
</verbatim>
The problem is association (one to one) between Entity and Value. It looks like stereotype Value is interpreted as Classifier and not Entity and it is good for me but why andromda try to cast it to Entity? How can I associate some stereotype with uml element (i.e. Classifier or Entity). I checked hibernate cartridge and I could not find association between Entity stereotype and Entity facade.
-- It associates it with an Entity because the hibernate cartridge
metafacades extend the basic metafacades.  You can find what metamodel
elements are mapped to what metafacades by looking in
andromda-all/metafacades/uml/uml14/src/META-INF/andromda-metafacades.xml
2. I want to use Spring instead of EJB so I created spring cartridge with one stereotype Service. I use it instead of Service from hibernate cartridge. It works :-) but I feel it is not perfect solution. I think there should be some way in hibernate cartridge to choose kind of service (ejb, spring or something else). There could be division of stereotype Service into two or more Services i.e. ServiceEJB, ServiceSpring ... but it does not look perfectly for me. Do you know some other solution?
-- I think a better solution is just to have another outlet for your
spring-services (so you can still use the same stereotype), and set that
outlet's required attribute to false, and also set the EJB service outlet's
required attribute to false as well (see this page for the required
attribute description:
http://team.andromda.org/docs/andromda-cartridges/index.html) this way you
can just specify the outlets you want in your cartridge namespace.  So if
you wanted to generate spring services, you'd just add the spring-services
outlet, if you wanted EJB instead, you define the ejb-services outlet
(instead of the spring-services outlet), etc.
   Thanks Tomek
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Re: [Andromda-user] Hibernate component and Spring

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