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From "Erik Hatcher" <jakarta-...@ehatchersolutions.com>
Subject Re: [PROPOSAL] simple input framework
Date Mon, 25 Feb 2002 16:45:46 GMT
+1

(no time to dig into the guts of it, but I'm all for this addition)

----- Original Message ----- 
From: "Stefan Bodewig" <bodewig@apache.org>
To: <ant-dev@jakarta.apache.org>
Cc: <usch@usch.net>
Sent: Monday, February 25, 2002 11:20 AM
Subject: [PROPOSAL] simple input framework


> ... or wait fo my mail ...
> 
> Current CVS has an <input> task written by Ulrich Schmidt (who may
> have left ant-dev, that's why I cc him).  This implementation directly
> reads input from System.in, which will be a big problem when running
> Ant from an IDE or Antidote.
> 
> In proposal/sandbox/input I've started a very simple framework that
> allows tasks to ask for user input and allows IDEs to intercept these
> requests - it also allows input to be read from a properties file,
> allowing interactive builds to be run in an unattended batch mode.
> 
> There are two minor changes two Project and Main.  Project now holds
> an instance of an InputHandler and provides access to it, Main
> provides a way to chose this handler on the command line.
> 
> Instead of reading input from System.in, an implementation of the
> InputHandler interface, that consists of the single method
> 
>     void handleInput(InputRequest request) throws BuildException;
> 
> is asked to take care of it.
> 
> The request encapsulates the prompt (which is the key for properties
> loaded from the properties file at the same time) and may perform
> input validation.
> 
> The DefaultInputHandler sends the prompt to System.out, which means it
> will end up in Ant's logging system, and query user input from
> System.in - reprompting until the user has provided some valid input.
> 
> Two other implementations are there as well - PropertyFileInputHandler
> for unattended builds and SwingInputHandler which is nothing more than
> a proof of concept (and very ugly indeed 8-).
> 
> I don't like the way the name of the property file gets passed to
> PropertyFileInputHandler - currently a system property - but couldn't
> come up with a better one without breaking the isolation between
> InputHandler and Project.
> 
> See the README file for more details.
> 
> I'd like to see this proposal being accepted for the 1.5 time frame so
> that we don't distribute <input> with its current limitations.
> 
> Stefan
> 
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> 


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