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From: "Lew" <lew@1:261/38.remove-yy0-this>
Subject: Re: Type of a generic class?
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Date: Fri, 03 Aug 2012 18:54:17 GMT
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  To: Donkey Hottie
From: Lew <lewbloch@gmail.com>

Donkey Hottie wrote:
> markspace kirjoitti:
>> ...

> I am trying to convert a simple { String name, String value } pair in

How about a Map<String, Global<?>>

Also, you should move that if-chain reflection out of your app and use 
polymorphism instead.

> database to a Global<T>(name) so that it will convert the Java simple
> datatypes to a string and back. This is for system parameters,
> configuration parameters.
>
>> It is indeed kind of spooky and strange idea, after all what is so wrong
>> about simple
>     String value = SystemProperties.getString("ParamName") ;
>
> It is OK, but I'm kind of toying with idea of strong typing of System
> Parameters: A Date can not be stored as Long or Double etc..

Using strings to look up types is not strong typing.

>
> The back end of the system parameters is simply
>
>
>
> CREATE TABLE SystemParameters
> (
>     name varchar(64) not null primary_key,
>     value varchar(512)
> ) ;
>
>
> That's it. That is have the table is given to me. But I want to make the
> Java code bit more pedantic on the types of the parameters it uses and
> maintains.

JPA does that for you, too.

Anyway, your use of reflection is anti-pedantic.

--
Lew

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