[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4347) use property names defined in CompositeUserType as default column names

[Xavier Dury (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=34697#action_34697 ] 

Xavier Dury commented on HHH-4347:
----------------------------------

please, some smart defaults would be very nice to have =) I think many people are using hibernate as their main jpa implementation because of all the useful things not covered by the specification... and user types are one of them. For my part, I have a composite user type for joda-time intervals and it would be nice if I wasn't forced to put @Columns everywhere.

> use property names defined in CompositeUserType as default column names
> -----------------------------------------------------------------------
>
>                 Key: HHH-4347
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4347
>             Project: Hibernate Core
>          Issue Type: New Feature
>          Components: annotations
>            Reporter: Michael Newcomb
>            Priority: Minor
>
> Consider:
> public class LongitudeLatitude
> {
>   protected double longitude;
>   protected double latitude;
> }
> public class LongitudeLatitudeCompositeUserType
>   implements CompositeUserType
> {
>   public String[] getPropertyNames()
>   {
>     return new String[] { "longitude", "latitude" };
>   }
>   public Type[] getPropertyTypes()
>   {
>     return new Type[] { Hibernate.DOUBLE, Hibernate.DOUBLE };
>   }
>   ...
> }
> @Entity
> public class Test
> {
>   @Basic(optional = false)
>   @Type(type = "foo.bar.LongitudeLatitudeCompositeUserType")
>   @Columns(columns = { @Column(name = "location_longitude"), @Column(name = "location_latitude") })
>   protected LongitudeLatitude location;
> }
> Why does the developer need to specify each column?
> I'd really rather let the CompositeUserType take care of that for me. Now, I have to tie the @Columns to the # of properties in my CompositeUserType AND the order in which they are defined? This seems to defeat the purpose of having a class (CompositeUserType) to tell Hibernate how to store it.
> Couldn't Hibernate prepend the property name 'location' and '_' to the front of each property name in the CompositeUserType?
> Perhaps (more than likely) I'm doing something wrong, but I get a failure if I do not specify the columns.
> Thanks,
> Michael

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