Ant: Convert class name to file path - ant

Question

How do I convert Java class names into file paths using Ant tasks?
For example, given a property containing foo.bar.Duck I'd like to get out foo/bar/Duck.class.
I tried (and failed) to implement this in terms of <pathconvert> and <regexpmapper>.

Answer 1

Here's a possible way to do this:
<property name="class.name" value="foo.bar.Duck"/>
<loadresource property="file.name">
<string value="${class.name}" />
<filterchain>
<replaceregex pattern="\." replace="/" flags="g" />
<replaceregex pattern="$" replace=".class" />
</filterchain>
</loadresource>
This puts the desired foo/bar/Duck.class into the file.name property.

Answer 2

Here's another way, using Ant resources and an unpackagemapper, which is designed for this purpose. The opposite package mapper is also available.
<property name="class.name" value="foo.bar.Duck"/>
<resources id="file.name">
<mappedresources>
<string value="${class.name}" />
<unpackagemapper from="*" to="*.class" />
</mappedresources>
</resources>
You use the resource value by means of the property helper syntax ${toString:...}, e.g.:
<echo message="File: ${toString:file.name}" />
Yields
[echo] File: foo/bar/Duck.class

Answer 3

I feel using ant script-javascript for this is much simpler
<property name="class.name" value="foo.bar.duck" />
<script language="javascript">
var className = project.getProperty("class.name");
println("before: " + className);
var filePath= className.replace("\\", "/");
println("File Path: "+filePath);
project.setProperty("filePath", filePath);
</script>
<echo message="${filePath}" />
note: that naming your variable same as argument e.g var wsPath may give error, it gave to me!
courtesy: https://stackoverflow.com/a/16099717/4979331