Re: How to map embedded value object?

[Thomas Mahler]

You have to tell OJB to use a PersistenField implementation supporting 
this in OJB.properties first, as it is not yet implemented in the 
default implementation:

PersistentFieldClass=org.apache.ojb.broker.metadata.fieldaccess.PersistentNestedFieldMaxPerformanceImpl

if your class has an attribute "address" of type Adress,
the mapping for the "street" attribute of "address" would look like follows:
      <field-descriptor id="10"
         name="adress->street"
         column="ADR_STREET"
         jdbc-type="VARCHAR"
      />
cheers,
Thomas
Rice Yeh wrote:
Hi,
 As stated in Martine Flower's artice
(http://martinfowler.com/eaaCatalog/embeddedValue.html)
"Many small objects make sense in an OO system that
don't make sense as tables in a database. Examples
include currency-aware money objects and date ranges.
Although the default thinking is to save an object as
a table, no sane person would want a table of money
values.". In OJB, how these small objects are mapped
to the same table of their master object?
Regards,
Rice 

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