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 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