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From Francis Galiegue <>
Subject Re: String manipulation (parsing / padding)
Date Mon, 04 May 2009 17:17:58 GMT
Le Monday 04 May 2009 17:27:15 Beth Hechanova, vous avez écrit :
> Hi,
> I am looking for a way in Ant to parse a string as well as create a new
> string that is zero-padded.  Does Ant have any built-in tasks/functions
> for manipulating strings?
> My input will be a version string in the format of x.y.z.  I need to
> take that input and create a string that is formatted to exactly 6
> characters, with each individual component of the original string
> resulting in 2 characters in the result string (zero left padding if the
> number is only one character).  So if my original string is 1.2.3, my
> resulting string will be 010203.
> I have been using NAnt lately and it has some built in functions for
> doing this sort of string manipulation.  Now I need to implement the
> same logic in Ant scripts.  I have been looking for something similar in
> Ant, but I have yet to come across anything.  I am using Ant v1.7.1.

ant-contrib has propertyregex. You can use it in this case. Here is an example 
build file:

<project name="test" basedir="." default="doit"

    <property name="orig" value="010203"/>

    <property name="theregex" value="^0([0-9])0([0-9])0([0-9])$$"/>
    <target name="doit">
        <ac:propertyregex property="first" input="${orig}" 
            select="\1" override="true"/>
        <ac:propertyregex property="second" input="${orig}" 
            select="\2" override="true"/>
        <ac:propertyregex property="third" input="${orig}" 
            select="\3" override="true"/>
        <echo>First is ${first}
Second is ${second}
Third is ${third}</echo>



Francis Galiegue
Ingénieur système
Mob : +33 (0) 683 877 875
Tel : +33 (0) 178 945 552
40 avenue Raymond Poincaré
75116 Paris

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