[XDoclet-JIRA] Created: (XDT-1606) jdo tag <order>

jdo tag <order>
---------------

         Key: XDT-1606
         URL: http://opensource.atlassian.com/projects/xdoclet/browse/XDT-1606
     Project: XDoclet
        Type: Improvement

  Components: JDO Module  
    Versions: 1.2.3    
 Environment: W2K, JDK5, Ant 1.6.5
    Reporter: André Fügenschuh
 Assigned to: xdoclet-devel (Use for new issues) 


For 1-N relations on an existing database I need a jdo tag "@jdo.order" with attribute "mapped-by" generating an element <order> under <field>  like the following:

    <class name="Foo"
            identity-type="application"
            detachable="true"> 
         <inheritance strategy="new-table"></inheritance>
        <field ...></field>
        <field name="details"
               persistence-modifier="persistent"
               null-value="default"> 
          <collection element-type="tld.domain.pkg.Detail"></collection>
          <element column="DetailID"></element>
          <order mapped-by="id"></order>
        </field>
      <fetch-group name="fgDetails">
         <field name="details"/>
      </fetch-group>
     </class>

Workaround: I (mis)used the "jdo_xml.package_class_field_element.xdt" to integrate it, so following that template's syntax I guess that I will be not much work to include a new "XDtConfig" in "jdo_xml.package_class_field.xdt" like:

	       <XDtConfig:ifConfigParamEquals paramName="jdospec" value="2.0">
          <XDtField:ifHasFieldTag tagName="jdo.element">
           <XDtMerge:merge file="xdoclet/modules/jdo/resources/jdo_xml.package_class_field_order.xdt">
           </XDtMerge:merge>
	        </XDtField:ifHasFieldTag>
	       </XDtConfig:ifConfigParamEquals>

and a "jdo_xml.package_class_field_order.xdt" like:

          <order
            <XDtField:ifHasFieldTag tagName="jdo.order" paramName="column">
                    column="<XDtField:fieldTagValue tagName="jdo.order" paramName="column"/>"
            </XDtField:ifHasFieldTag>
            <XDtField:ifHasFieldTag tagName="jdo.order" paramName="mapped-by">
                    mapped-by="<XDtField:fieldTagValue tagName="jdo.order" paramName="mapped-by"/>"
            </XDtField:ifHasFieldTag>
          > <XDtComment:comment> end tag *order* </XDtComment:comment>
          </order>

(See: http://www.jpox.org/docs/1_1/metadata_reference.html#order for details)

BTW: What about two "merge points" in "jdo_xml.xdt" (for the class element) and "jdo_xml.package_class_field_element.xdt" (for the field element) to get entry points for "user" adaptations?

As long as many parts of the jdo2 spec are not yet (and maybe will never be) supported (see: XDT-1140), this could be a (interim) solution.


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