Mark,
1. Remove one of the "aaa" field mappings in the test.Abba class
mapping, you
can only have one field mapping for a collection.
2. Change the other field mapping to:
<field name="aaa" type="test.Aaa" collection="collection">
<bind-xml auto-naming="deriveByClass"/>
</field>
Both Bbb and Ccc should be correctly mapped. If you have any problems
with the above,
you can also add a matches attribute as such:
<bind-xml auto-naming="deriveByClass" matches="Bbb Ccc"/>
--Keith
Mark Katheklakis wrote:
>
> Hello
>
> Is there any way to bind two XML elements (Bbb and Ccc) to the same java
> field...???
>
> I'm trying to obtain a polymorphic data structure using castor XML
> Mapping....
> The example below fails, but illustrates what I'm attempting to do......
>
> Any assistance or pointers greatly appreciated...
>
> Cheers
> Mark
>
> ------------------------------
> -- Java Objects
> ------------------------------
>
> Class Aaa {
> String name;
> String desc;
> }
>
> Class Bbb extends Aaa {
> String blah;
> }
>
> Class Ccc extends Aaa {
> String fooo;
> }
>
> Class Abba {
> Collection aaa; //contains descendants of Aaa ie Bbb | Ccc
> }
>
> -----------------------------
> -- XML
> ------------------------------
>
> <Abba>
> <Bbb>
> <name>bbb name</name>
> <desc>bbb desc</desc>
> <blah>bbb blah</blah>
> </Bbb>
> <Ccc>
> <name>ccc name</name>
> <desc>ccc desc</desc>
> <fooo>ccc fooo</fooo>
> </Ccc>
> </Abba>
>
> -------------------------------
> -- Mapping
> ------------------------------
>
> <mapping>
> <class name="test.Abba">
>
> <map-to xml="Abba"/>
>
> <field name="aaa" type="test.Bbb" collection="collection">
> <bind-xml name="Bbb"/>
> </field>
> <field name="aaa" type="test.Ccc" collection="collection">
> <bind-xml name="Ccc"/>
> </field>
> </class>
>
> <class name="test.Aaa">
> <field name="name" type="string">
> <bind-xml name="name" node="element"/>
> </field>
> <field name="desc" type="string">
> <bind-xml name="desc" node="element"/>
> </field>
> </class>
>
> <class name="test.Bbb" extends="test.Aaa">
> <field name="blah" type="string">
> <bind-xml name="blah" node="element"/>
> </field>
> </class>
>
> <class name="test.Ccc" extends="test.Aaa">
> <field name="fooo" type="string">
> <bind-xml name="fooo" node="element"/>
> </field>
> </class>
>
> </mapping>
>
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