[Xdoclet][composite-id]composite-id code using XDoclet

seb_fou · **Posted:** Thu Mar 02, 2006 12:02 pm

Generating composite-id code using XDoclet.

I want to generate my *.hbm.xml file with Xdoclet

I see Xdoclet @hibernate.composite-id, but no example
Is there anybody which tried this ?

kgignatyev · **Posted:** Thu Mar 02, 2006 1:01 pm

Looking at the XDoclet template might give you pretty good idea

xdoclet-1.2.3/modules/hibernate/src/xdoclet/modules/hibernate/resources/hibernate.xdt

Code:

<XDtHibernate:ifHasCompositeId>
        <composite-id
            name="<XDtMethod:propertyName/>"
            class="<XDtMethod:methodTagValue tagName="hibernate.id" paramName="class" default="<XDtMethod:methodType/>"/>"
            <XDtMethod:ifHasMethodTag tagName="hibernate.id" paramName="unsaved-value">
            unsaved-value="<XDtMethod:methodTagValue tagName="hibernate.id" paramName="unsaved-value" values="any,none"/>"
            </XDtMethod:ifHasMethodTag>
        >
        <XDtClass:pushClass value="<XDtMethod:methodType/>">
            <XDtMethod:forAllMethods superclasses="true" sort="true">
                 <XDtMethod:ifHasMethodTag tagName="hibernate.property">
                     <key-property
                        name="<XDtMethod:propertyName />"
                        type="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="type" default="<XDtMethod:methodType/>"/>"
                        column="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="column" default="<XDtMethod:propertyName/>"/>"
                       <XDtMethod:ifHasMethodTag tagName="hibernate.property" paramName="length">
                        length="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="length" />"
                       </XDtMethod:ifHasMethodTag>
                />
                </XDtMethod:ifHasMethodTag>

                <XDtMethod:ifHasMethodTag tagName="hibernate.many-to-one">
                    <key-many-to-one
                        name="<XDtMethod:propertyName/>"
                        class="<XDtMethod:methodTagValue tagName="hibernate.many-to-one" paramName="class" default="<XDtMethod:methodType/>" />"
                        column="<XDtMethod:methodTagValue tagName="hibernate.many-to-one" paramName="column" default="<XDtMethod:propertyName/>"/>"
                    />
                </XDtMethod:ifHasMethodTag>
            </XDtMethod:forAllMethods>
        </XDtClass:pushClass>
        </composite-id>
    </XDtHibernate:ifHasCompositeId>

It looks like your compositeID class should have its relevant methods marked as hibernate.property and they will be included in the composite ID.

If you do not quite like what gets generated you can easily create modified version of the template locally and supply it to the build process

seb_fou · **Posted:** Thu Mar 02, 2006 1:33 pm

ok Thanks,
But i don't want to create a CompositeID class for each class,
i have just my object and his primary keys & properties
is it possible ?

kgignatyev · **Posted:** Thu Mar 02, 2006 2:45 pm

It looks like currently XDoclet does not have that feature but you can easily do it yourself , for example you can put hibernate.key-property marks on methods and use them by adding lines like this:

Code:

            <XDtMethod:forAllMethods superclasses="true" sort="true">
                 <XDtMethod:ifHasMethodTag tagName="hibernate.key-property">
                     <key-property
                        name="<XDtMethod:propertyName />"
                        type="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="type" default="<XDtMethod:methodType/>"/>"
                        column="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="column" default="<XDtMethod:propertyName/>"/>"
                       <XDtMethod:ifHasMethodTag tagName="hibernate.property" paramName="length">
                        length="<XDtMethod:methodTagValue tagName="hibernate.property" paramName="length" />"
                       </XDtMethod:ifHasMethodTag>
                />
                </XDtMethod:ifHasMethodTag>

                <XDtMethod:ifHasMethodTag tagName="hibernate.key-many-to-one">
                    <key-many-to-one
                        name="<XDtMethod:propertyName/>"
                        class="<XDtMethod:methodTagValue tagName="hibernate.many-to-one" paramName="class" default="<XDtMethod:methodType/>" />"
                        column="<XDtMethod:methodTagValue tagName="hibernate.many-to-one" paramName="column" default="<XDtMethod:propertyName/>"/>"

/>
</XDtMethod:ifHasMethodTag>
</XDtMethod:forAllMethods>

david · **Posted:** Thu Mar 02, 2006 10:14 pm

The CVS version allow this functionality (but I have not tried it). Please note that the hibernate recommended method is to use separate composite key class.

Cue · **Joined:** Tue May 04, 2004 6:15 am **Posts:** 51

As others have said its better to use a class.
The way you do this is you simply declare a

Code:

    /**
    * @hibernate.id
    */

for your #getId() method returning the class to use as a "composite id".

On your "composite id" class you simply declare as

Code:

    /**
    * @hibernate.property
    */

the properties of your POJO that you want to use as property keys.

Don't forget to override #equals() and #hashCode()

seb_fou · **Posted:** Fri Mar 03, 2006 4:53 am

Thanks to everybody
Finally, i use the Cue's method with a composite class,
that i have put in my Object, as a inner Class