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Posted to user-java@ibatis.apache.org by Gustavo Henrique Sberze Ribas <gr...@cpqd.com.br> on 2009/06/30 15:25:39 UTC
LazyLoading and CGLib problem
Hi everyone,
I'm facing one big problem with lazyLoading and CGLib. In my xml, I
have a resultMap as follows:
<resultMap class="MyClass" id="myClassMap">
<result property="name" column="col1"
javaType="java.lang.String" />
<result property="middleName" column="col2"
javaType="java.lang.String" />
<result property="lastName" column="col3"
javaType="java.lang.String" />
<result property="permissions" column="col1"
select="myXml.getPermissions" />
</resultMap>
In my java class "MyClass", "permissions" is an interface named
"PermissionsIfc" (with only two methods: isInsert() and setInsert(...).
In the select statement, I have the following:
<select id="getPermissions" parameterClass="java.lang.String"
resultMap="permissionsMap">
SELECT
col5, col6, col7, col8
FROM
my_table_5
WHERE
username = #value#
</select>
And for resultMap "permissionsMap", I have the following:
<resultMap class="PermissionsClass" id="permissionsMap">
<result property="insert" column="col5"
javaType="java.lang.Boolean" />
<result property="update" column="col6"
javaType="java.lang.Boolean" />
<result property="delete" column="col7"
javaType="java.lang.Boolean" />
<result property="connect" column="col8"
javaType="java.lang.Boolean" />
</resultMap>
PermissionsClass implements PermissionsIfc, so PermissionsClass should
be the instantiated class for property "permissions" in my first
resultMap.
In my code, when I try to cast "permissions" to PermissionsClass, I'm
getting a ClassCastException saying that PermissionsIfc cannot be cast
to PermissionsClass. When LazyLoading was disabled, I wasn't getting
this error. Is there any way to solve this?
Thanks,
Rodrigo
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Re: LazyLoading and CGLib problem
Posted by Stefan Gmeiner <st...@gmail.com>.
Please take a look at http://issues.apache.org/jira/browse/IBATIS-596
The Problem is that the CGLib-Proxy use the type of the property in
"myClassMap"-ResultMap instead of the result class of "permissionMap".
The patch "lazy-loading.txt" at IBATIS-596 solves this problem.
2009/6/30 Gustavo Henrique Sberze Ribas <gr...@cpqd.com.br>:
> Hi everyone,
>
> I'm facing one big problem with lazyLoading and CGLib. In my xml, I
> have a resultMap as follows:
>
> <resultMap class="MyClass" id="myClassMap">
> <result property="name" column="col1"
> javaType="java.lang.String" />
> <result property="middleName" column="col2"
> javaType="java.lang.String" />
> <result property="lastName" column="col3"
> javaType="java.lang.String" />
> <result property="permissions" column="col1"
> select="myXml.getPermissions" />
> </resultMap>
>
> In my java class "MyClass", "permissions" is an interface named
> "PermissionsIfc" (with only two methods: isInsert() and setInsert(...).
>
> In the select statement, I have the following:
>
> <select id="getPermissions" parameterClass="java.lang.String"
> resultMap="permissionsMap">
> SELECT
> col5, col6, col7, col8
> FROM
> my_table_5
> WHERE
> username = #value#
> </select>
>
> And for resultMap "permissionsMap", I have the following:
>
> <resultMap class="PermissionsClass" id="permissionsMap">
> <result property="insert" column="col5"
> javaType="java.lang.Boolean" />
> <result property="update" column="col6"
> javaType="java.lang.Boolean" />
> <result property="delete" column="col7"
> javaType="java.lang.Boolean" />
> <result property="connect" column="col8"
> javaType="java.lang.Boolean" />
> </resultMap>
>
> PermissionsClass implements PermissionsIfc, so PermissionsClass should
> be the instantiated class for property "permissions" in my first
> resultMap.
>
> In my code, when I try to cast "permissions" to PermissionsClass, I'm
> getting a ClassCastException saying that PermissionsIfc cannot be cast
> to PermissionsClass. When LazyLoading was disabled, I wasn't getting
> this error. Is there any way to solve this?
>
> Thanks,
> Rodrigo
>
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> To unsubscribe, e-mail: user-java-unsubscribe@ibatis.apache.org
> For additional commands, e-mail: user-java-help@ibatis.apache.org
>
>
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