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Re: JDK 1.5 beta2 and generics

From: Kris Jurka <books(at)ejurka(dot)com>
To: Dave Cramer <pg(at)fastcrypt(dot)com>
Cc: "pgsql-jdbc(at)postgresql(dot)org" <pgsql-jdbc(at)postgresql(dot)org>
Subject: Re: JDK 1.5 beta2 and generics
Date: 2004-06-18 16:30:17
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc

On Fri, 18 Jun 2004, Dave Cramer wrote:

> Kris,
> How does the 1.3, 1.4 driver handle this ?

In the past they haven't touched the API without a new JDBC version.  Our 
model handles this cleanly with a separate directory/implementation for 
the new part of the API.  The problem here is that they have changed the 
method signature's specified in an interface without changing the API 

Note that this is only a problem for implementors, not callers.  
The weak generic type checking allows for instance a method like
func(Hashtable<String,String>) to be called with func(new Hashtable()).  
It doesn't require the caller to alter their passed data type only the 
implementor to match the stricter method signature.

Kris Jurka

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