Is it true that hbm2java can only be used with Hibernate2?
Is there an equivalent in Hibernate3?
Generally speaking, what's the good mapping and POJO data object generating too for Hibernate3?

Thanks a lot!

hbm2java works for both hibernate 2 and 3. the "2" is just a play on words ... hibernate-to-java

what does your third question mean?

correction:

Use the tools version that matches the hibernate major version.

Hibernate 2 tools with hibernate 2 and hibernate 3 tools with hibernate3.

hibernate 2 tools is not maintained anymore - only hibernate 3 tools at http://tools.hibernate.org is being developed.

Thanks for Dennis and Max.
I'm pretty new to Hibernate and its Tool. So any information will be appreciated!


Max:
I have tried the Hibernate 3 Ant Tool, and was able to generate the POJO java classes based on the hbm.xml files.
Now I'm trying to generate hbm.xml files from the database schema. I understand I should use the 'reverse engineering' strategy in Hibernate 3 Ant Tool, right? But I can't make it right by following the only example in the document(http://www.hibernate.org/hib_docs/tools/ant/).

Here is what I have:
<target name="ddl2xml" description="Generate .java from .hbm files.">
<taskdef
name="ddl2xml"
classname="org.hibernate.tool.ant.HibernateToolTask"
classpathref ="compile-classpath"
/>

<ddl2xml destdir="${gen.dir}">
<jdbcconfiguration configurationfile="${webapp.dir}/WEB-INF/classes/hibernate.cfg.xml"/> </ddl2xml>
</target>

It doesn't generate anything.
I know my question seems dumb, but I cannot find any more examples of how to do it right. (Again, I'm trying to generate mapping files from DB schema)

Please advice.


Thanks

does hibernate.cfg.xml have any mapping elements? this may explain the blank output.

for your other question, you are going to need a revengfile attribute on the jdbcconfiguration element.

on the contrary if hibernate.cfg.xml had any mappings it would definitly generate some output since they are read like any other cfg.xml.

it must because it cannot read the metadata from the database.

e.g. if on oracle, and you use a schema name remember to use uppercase as its case sensitive.

Thanks again for Dennis and Max!


What kind of mapping do I need in my Hibernate.cfg.xml?
mapping resource? Where can I find some examples or tutorials?

again, I need to generate hbm.xml from my database tables.

And which 'exporter' should I use? hbm2hbmxml?

OK, I made the hbm2hbmxml work! Thanks.

ok, for some reason i though he was doing an hbm2ddl .