accessing project dependencies in custom ant task

[Torsten Curdt]

In a custom ant task I would like to get the dependencies (and the  
paths to the artifacts) of the project as defined in the ivy.xml.  
When writing a maven mojo =:-o I would use

  Set projectArtifacts = getProject().getArtifacts();
How could I get the dependencies from ivy in my ant task?

cheers
--
Torsten