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From Tom Duffey <tduf...@utilivisor.com>
Subject Re: Problem w/enum and TypeHandlerCallback
Date Tue, 17 Oct 2006 13:11:32 GMT

On Oct 17, 2006, at 1:46 AM, Christopher.Mathrusse@sybase.com wrote:

> I'm using Enums without difficulty. I've implemented a  
> TypeHandlerCallback to accommodate the set and get in the following  
> manner:

Are your enums enclosed within another class or external?  My enums  
are enclosed within classes and iBATIS is looking for a type handler  
for the enclosing class on insert/update instead of the enum.  Using  
externally declared enums w/the same type handler works fine.

Tom

>
> From: Tom Duffey <tduffey@utilivisor.com> [mailto:Tom Duffey  
> <tduffey@utilivisor.com>]
> Sent: Monday, October 16, 2006 4:48 PM
> To: user-java@ibatis.apache.org
> Subject: Problem w/enum and TypeHandlerCallback
>
> Hi All,
>
> I'm having a problem with Java 5 Enums and iBATIS
> TypeHandlerCallbacks. I've read the wiki article and it doesn't help
> with my particular issue. Retrieving objects is working fine but
> inserting/updating them is throwing this NPE:
>
> java.lang.NullPointerException
> at com.ibatis.sqlmap.engine.type.UnknownTypeHandler.setParameter
> (UnknownTypeHandler.java:72)
> at
> com.ibatis.sqlmap.engine.mapping.parameter.BasicParameterMap.setParame 
> te
> r(BasicParameterMap.java:165)
> at
> com.ibatis.sqlmap.engine.mapping.parameter.BasicParameterMap.setParame 
> te
> rs(BasicParameterMap.java:125)
> at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeUpdate
> (SqlExecutor.java:76)
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.sqlExecute 
> Up
> date(GeneralStatement.java:200)
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeUpd 
> at
> e(GeneralStatement.java:78)
> at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.insert
> (SqlMapExecutorDelegate.java:446)
> at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.insert
> (SqlMapSessionImpl.java:82)
> at org.springframework.orm.ibatis.SqlMapClientTemplate
> $9.doInSqlMapClient(SqlMapClientTemplate.java:358)
> at org.springframework.orm.ibatis.SqlMapClientTemplate.execute
> (SqlMapClientTemplate.java:188)
> at org.springframework.orm.ibatis.SqlMapClientTemplate.insert
> (SqlMapClientTemplate.java:356)
> ...
>
> Here's my basic setup:
>
> public interface Tenant {
> public enum Type { FOO, BAR }
> public Type getType();
> public void setType(Type type);
> ...
> }
> public class TenantImpl implements Tenant {
> private Type type;
> public Type getType() { return type; }
> public void setType(Type type) { this.type = type; }
> ...
> }
>
> My type handler for Tenant$Type looks a lot like the examples in the
> wiki article. The types are mapped in my SqlMapConfig:
>
>
> callback="com.utilivisor.dao.ibatis.TenantTypeEnumTypeHandler"/>
>
> I'm messing around with UnknownTypeHandler.setParameter() and am very
> confused. I checked the incoming value of parameter.getClass() and
> it is correct, i.e., foo.bar.Tenant$Type. usingJavaPre5 is set
> (Which is confusing by itself because I am using Java5) so
> getBaseClass() is called and the new searchClass is foo.bar.Tenant.
> I do not have or want a type handler for foo.bar.Tenant. Can anyone
> help?
>
> Tom
>


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