RE: Extracting values from a line of a file

[Rebhan, Gilbert]

 
Hi,


-----Original Message-----
From: Maninder Singh (GR/EIL) [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, April 11, 2007 6:47 AM
To: user@ant.apache.org
Subject: Extracting values from a line of a file

/*
Hi,
        I am trying to figure out a way to extract the values from a
line in a file. 

To be more precise; there is a file that contains lines containing the
following fields (separated by spaces / tabs):
Name            Age             Contact_Number

I want to search for a particular name in this file (which I guess can
be done by using the Ant "loadproperties" task) and extract the age
corresponding to that Name from the file. Is there a way to do this?
*/

with  =

bsf.jar (Bean Scripting Framework)
http://jakarta.apache.org/bsf/
jruby.jar
http://jruby.codehaus.org/

in sight for ant, i.e. in %ANT_HOME%/lib

you may use <script>, something like =

txtfile given =

Joe     22      1234567
Jack    33      3456789
Homer   44      1231231

and then =

<?xml version="1.0"?>

<project name="bla" default="main" basedir=".">

    <!-- // Properties -->
    <property name="scanfor" value="Homer"/>
    <!-- Properties // -->

    <target name="depends">
        
        <script language="ruby">
        <![CDATA[
 
File.read('Y:/test.txt').scan(/(#{$scanfor})\t(\d{1,3})\t(\d+)/)
{|a,b,c|
            $project.setProperty "scanresult",b
            }
         ]]>
         </script>
        
    </target>

    <target name="main" depends="depends">

    <echo>
        age of == ${scanfor} ==> ${scanresult}
    </echo>

    </target>
</project>


** the second group of the regex = (\d{1,3}) means the age must contain
one
digit and has the limit of max three digits. Someone might be 100 years
old,
not the normal case, but  maybe ;-)


Regards, Gilbert





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