[
http://issues.apache.org/jira/browse/IBATIS-225?page=comments#action_12360278 ]
Perry Nguyen commented on IBATIS-225:
-------------------------------------
I, too, have a somewhat related problem.
I have interfaces for all of my domain objects, thus, I have something like
this contrived example:
interface Person {
Address getAddress/setAddress
String getName/setName
}
interface Address {
String getStreetName/setStreetName
}
class ConcretePerson {
// implement Person interface
}
class ConcreteAddress {
// implement Address interface
}
Person and Address are in a 1:1 relationship.
Say I want to load the address object in a join with person, how do I do that?
<resultMap id="myResult" class="ConcretePerson">
<result property="name" column="PERSON_NAME"/>
<result property="address.streetName" column="ADDR_ST_NAME"/>
</resultMap>
<!-- using the above resultMap results in an InstantiationException because
Address is an interface -->
<select ... resultMap="myResult">
select p.name as person_name, a.name as addr_st_name
from person p, address a
where p.addr_id = a.id
</select>
Alternatively, I tried
<resultMap id="myResult" class="ConcretePerson">
<result property="name" column="PERSON_NAME"/>
<result property="address" resultMap="myAddrResult"/>
</resultMap>
<resultMap id="myAddrResult" class="ConcreteAddress">
<result property="streetName" column="ADDR_ST_NAME"/>
</resultMap>
This results in an instantiation exception as well, except it's in the list
generating code.
> Reuse resultmap for single bean property
> ----------------------------------------
>
> Key: IBATIS-225
> URL: http://issues.apache.org/jira/browse/IBATIS-225
> Project: iBatis for Java
> Type: Improvement
> Components: SQL Maps
> Reporter: Huy Do
>
> Allow the following reuse of result maps
> <resultMap id="Pick" class="package.domain.Pick">
> <result property="pickId" column="pick_id"/>
> <result property="sale" resultMap="Sale"/>
> </resultMap>
> <resultMap id="Sale" class="Sale">
> <result column="sale_id" property="saleId"/>
> </resultMap>
> with beans
> class Pick {
> String pickId;
> Sale sale;
> }
> class Sale {
> String saleId;
> }
> At the moment <result property="sale" resultMap="Sale"/> can only be reused
> if property "sale" is a collection.
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