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From "Antoine Levy-Lambert" <>
Subject Re: RE: Setting the value of a property conditonally
Date Fri, 04 Aug 2006 14:33:54 GMT

if you need to make previous business day calculation, you could/should create a custom task
doing exactly this.


-------- Original-Nachricht --------
Datum: Fri, 4 Aug 2006 08:59:16 -0500
Von: "Dominique Devienne" <>
An: "Ant Users List" <>
Betreff: Re: RE: Setting the value of a property conditonally

> > I'm faced with a situation that calls for me to select the previous
> "business day". In the U.S. business days are generally Mon, Tue, Wed, Thu,
> Fri, with Saturday and Sunday not usually counted.
> >
> > On most days of the week, the previous business day is the current date
> - 1 day. On Monday however, the previous business day is the current date -
> 3 days.
> >
> > Federal holidays complicate the matter further. In the U.S. most federal
> holidays are observed on Mondays. Therefore, on a Tuesday following a
> Monday that is a federal holiday, the previous business day is the current date
> - 4 days.
> >
> > Some federal holidays do occur on other days, so on days following one
> of these, the previous business day is the current date - 2 days (unless, of
> course, the federal holiday falls on a non-business day).
> >
> > This is all fairly easily handled in XSLT using the <xsl:choose> element
> and a list of the dates on which federal holidays are observed.
> >
> > I have worked out an alternative plan that calls for using the <xslt>
> task to process the file containing the list of federal holidays and create a
> new XML file holding the data I want. I could then use the <xmlproperty>
> element to set the values of the properties.
> >
> > I don't really want to create an intermediate file to perform this task,
> so I'm asking if there is any other way to achieve this result in Ant that
> I'm not seeing because I have the wrong mental model.
> Ant itself refrains from providing tools (tasks/types) that would make
> it easy to (ab)use it as a programing language. It aims at being very
> declarative, and not scripty. The rational is that it's very easy to
> abstract or hide away the scripty part in smart tasks, and since Ant
> is easy to extend (once the initial learning curve hump is past), in
> Java code or using true scripting language, it's the recommended way.
> That said, the Ant-Contrib project supplements Ant with <for>, <if>,
> <switch>, <try/catch>, etc... Except for <for>, I've used it seldom,
> or only initialy to prototype something before migrating the same
> logic into custom tasks. --DD

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