Hi Matthew, all,
Matthew Adams, am 8 Apr 2011 hast Du um 9:15 zum Thema "[jsr338-experts] Re: stored procedures" geschrieben :
> I haven't fully thought this through, but is there a way to provide
> more type safety to the methods
>
> Object getOutputParameterValue(int position)
> Object getOutputParameterValue(String parameterName)
>
> on StoredProcedureQuery? Any other methods where generics could be used?
Me, on the contrary, I was wondering about the meaning of
<T> StoredProcedureQuery setParameter(Parameter<T> param, T value)
which we inherit from Query. Could I use the
<T> ParemeterExpression<T> parameter(Class<T> paramClass, String name)
method of CriteriaBuilder to get a Parameter<T> object and set a stored
procedure parameter with it based on name identity ? What about a
Parameter<T> object without name and position as obtained from
<T> ParemeterExpression<T> parameter(Class<T> paramClass)
This brought me to the idea that we might want to consider changing the
return type of the register methods
<T> Parameter<T> registerStoredProcedureParameter(
int position,
Class<T> type,
ParameterMode mode)
<T> Parameter<T> registerStoredProcedureParameter(
String parameterName,
Class<T> type,
ParameterMode mode)
which would enable us to add a method
<T> <T> getOutputParameterValue(Parameter<T> param)
We could then say that the usage of a Parameter<T> object other than
the ones created by one of the register methods is undefined for a
certain StoredProcedure.
What do you think ?
Kind regards
Rainer
---
Rainer Schweigkoffer SAP AG Walldorf
Business Solution & Technology TD Core JS&I
Technology Development Dietmar-Hopp-Allee 16
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rainer.schweigkoffer_at_sap.com
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