Q on Controlling POJO generation

davis · **Joined:** Fri Jan 26, 2007 3:16 pm **Posts:** 24

Hi, I'm reading the hibernate_tools.pdf Chp. 6 "Controlling POJO Code Generation".

I understand the use of the meta tag, etc, but I use the Eclipse plugin to generate both the hbm.xml files and the domain classes.

I'm not sure where I should put

Code:

tags.

If I put them in SomeDomainClass.hbm.xml it gets overwritten when I use the plugin.

If I don't choose the hbm.xml exporter, and only choose the domain code generation exporter, and put meta tags in the SomeDomainClass.hbm.xml file...when I re-run, I don't see it take effect.

E.g. I added the following tag:

Code:

<class etc..>
  <meta attribute="implements">SomeInterface</meta>
etc...
</class>

If I re-run, SomeDomainClass still does not implement SomeInterface.

I tried also adding it to Globals.hbm.xml that does not get generated by the Exporter, but still no luck?

How can I affect POJO generation with the Eclipse plugin?

Thx in advance,
Davis

davis · **Joined:** Fri Jan 26, 2007 3:16 pm **Posts:** 24

Ok, answering my own question here, which actually spawned a few new questions.

In hibernate.reveng.xml I tried:

Code:

<table name="SOMETABLE">
  <column name=" ...etc...
  <meta attribute="extends">some.package.MyAbstractClass</meta>
etc..

but the DTD complains about this...

Quote:

The content of element type "table" must match "(meta*,primary-key?,column*,foreign-key*)".

Why is this?

So, I moved it up to table-filter like so:

Code:

<table-filter match-name="SOMETABLE">
   <meta attribute="extends">some.package.MyAbstractClass</meta>
</table-filter>

...and this works.

max · **Posted:** Mon Feb 05, 2007 12:44 pm

you need to follow the DTD; nothing special about it.

Code:

<table name="SOMETABLE"> 
  <meta attribute="extends">some.package.MyAbstractClass</meta>    <column name=" ...etc... 

will work. Just as the DTD states ;)

davis · **Joined:** Fri Jan 26, 2007 3:16 pm **Posts:** 24

max wrote:

you need to follow the DTD; nothing special about it.

Code:

<table name="SOMETABLE"> 
  <meta attribute="extends">some.package.MyAbstractClass</meta>    <column name=" ...etc... 

will work. Just as the DTD states ;)

Max -- my error...you are correct. Missed the explicit ordering of the DTD.

A follow-up question, though. I want to assign my own Comparator. Consider I have the following entry in hibernate.reveng.xml

Code:

   <table name="SHAPE">
      <column name="EDGE_ID" type="long" property="edgeId"></column>
      <column name="SEQNR" type="int" property="seqNumber"></column>
      <column name="FYSPKEY" type="int" property="shapeFysKey"></column>
      <column name="X" type="int" property="x"></column>
      <column name="Y" type="int" property="y"></column>
      <column name="Z" type="int" property="z" exclude="true"></column>
      <foreign-key constraint-name="XFKSHAPE_EDGE" foreign-table="EDGE">
         <column-ref local-column="EDGE_ID" foreign-column="EDGE_ID" />
         <column-ref local-column="FYSPKEY" foreign-column="FYSPKEY" />
         <many-to-one property="edge" />
      </foreign-key>      
   </table>

In the Edge.java class, then this creates:

Code:

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "edge")
    public Set<Shape> getShapes() {
   return this.shapes;
    }

which is almost what I want. What I really want is either a List or a SortedSet that sorts based on the SEQNR column. I can build my own Comparator that does this after the fetch, but it seems more logical to store it as a SortedSet or a List here. I can't seem to figure out how to instrument this via hibernate.reveng.xml. Any suggestions on how I might do this?

Thx in advance,
Davis[/i]

max · **Posted:** Thu Feb 08, 2007 5:29 am

its not supported when reverse engineering