I am using hibernate tools to generate hbm files and pojos. I would like generated pojos to have toString() and equals() methods. Also equals() method should only compare primary key field(s). Since I don't want to manually edit the hbm.xml files every time I generate them before generating pojos, I have including the following two lines in "persistentclass.hbm.ftl" file.

<meta attribute="use-in-tostring">true</meta>
<meta attribute="use-in-equals">true</meta>

This works fine and generated pojos with toString and equals() methods however equals() method compares all the fields. How can I restrict it to include only primary key field(s).

I am using

Hibernate 3.2.2

Here is the generated hbm.xml after above modification to "persistentclass.hbm.ftl"


<hibernate-mapping>
<class name="com.icrossing.audienceengine.dao.hibernate.mapping.keyword_list" table="keyword_lists" schema="public">
<meta attribute="use-in-tostring">true</meta>
<meta attribute="use-in-equals">true</meta>
<comment>This table stores the main components of user work list</comment>
<id name="keywordListId" type="java.lang.Integer">
<column name="kl_id" />
<generator class="org.hibernate.id.SequenceGenerator">
<param name="sequence">keyword_list_keword_list_id_seq</param>
</generator>
</id>
..........
..........
list of fields removed to reduce size
..........
</class>
</hibernate-mapping>

don't but use-in-equals in the root of <class> if you don't mean it for all properties.

Only put it on the fields you want it for.

And btw. *DONT* use the primary key in equals/hashcode if you use automatic id's and detached objects with hash based collections. (see www.hibernate.org/109.html)

Is there any documentation on the freemarker templates used by hibernate tools to generate hbm and java files. It would be very helpfult when we need some cutomizations like including few fields in toString or equals etc..

the documentation contains doc for the meta tags etc.