Return a custom data type from Ant to Maven - maven

Question

I have an Ant script called from Maven to perform some tasks. One such task is to read a text file linewise and use its content to perform text replacements on a huge set of files. The text file will be in the following format on each line:
name#URL#Title
Ant task for this is as follows:
<target name="update-urls" depends="load-ant-contrib">
<loadfile property="file" srcfile="${mapping.file}"/>
<foreach param="file.entry" list="${file}" delimiter="${line.separator}" target="update-template"></foreach>
</target>
<!--Get the name,url and title of each line-->
<target name="update-template">
<propertyregex property="name"
input="${file.entry}"
regexp="(.*)#(.*)#(.*)$"
select="\1"/>
<propertyregex property="url"
input="${file.entry}"
regexp="(.*)#(.*)#(.*)$"
select="\2"/>
<propertyregex property="title"
input="${file.entry}"
regexp="(.*)#(.*)#(.*)$"
select="\3"/>
<echo>${template.name}</echo>
<!--Use title and url to match and replace the URL with the URL in text file-->
<replaceregexp byline="true"
match="(<title>${title} *</title>.*)${url} *"
replace="\1../modified-path/${name}.zip"
flags="g"
encoding="utf-8"
>
<!--Following are the files on which replacement has to happen-->
<fileset dir="${huge.set.of.files}/items">
<include name="**/info.xml"/>
</fileset>
</replaceregexp>
</target>
Since this needs to work on huge set of files, the above solution is not very efficient. I have coded a mutithreaded solution for it in Java which takes up multiple regex expressions(name, value pairs) at once.I've integrated it into my maven project as a mojo.
I'm having trouble with two things:
Framing a data-type to contain a list of name, url, title triplets in Ant.
If I'm successful with step 1., how to return this data structure to POM from where the Ant task got called and decode this data structure to be able to access each element's name, url and title separately..
Can someone guide me on how to go about this..