Automatic user type chooser

cameronbraid · **Joined:** Thu Aug 26, 2004 5:53 am **Posts:** 37

Hibernate currencly can automatically choose the hibernate type to use when a the mapping doesn't specify the type property.

Can this system be extended to support user types ?

For example, say I want to use Joda-Time DateTime and YearMonthDay classes for my persistent properties.

Code:

class Booking {
  
   private org.joda.time.DateTime dts;
   private org.joda.time.YearMonthDay checkinDate;

   // getters and setters
}

in my mapping I would like to be able to do :

Code:

<typedef 
  class='hidahibernate.DateTimeUserType'
  name='jodaDateTime'
/>
<typedef 
  class="hidahibernate.YearMonthDayUserType'
  name='jodaYearMonthDay'
/>

<class name='Booking'>
  <property name='dts'/>
  <property name='checkinDate'/>
</class>

Then some how specify a strategy to resolve property classes org.joda.time.YearMonthDay and org.joda.time.DateTime to user types named 'jodaYearMonthDay' and 'jodaDateTime'.

cameronbraid · **Joined:** Thu Aug 26, 2004 5:53 am **Posts:** 37

One idea may be to add a new attribute to the <typedef> element "defaultForReturnedClass" since the USerType implementation has a public Class returnedClass() method, the <typedef> that is flagged as default could be chosen automatically for these properties.

cameronbraid · **Joined:** Thu Aug 26, 2004 5:53 am **Posts:** 37

anyone have anything to say on this ?

emmanuel · **Posted:** Fri Apr 22, 2005 10:37 am

how about providing a patch :-)