Convert Ant Scripts to Use ClearCase

I have an ANT scripts that uses PVCS version manager to checkout source code, compiles the source code and then labels the source with a new build number.? I want to convert the scripts to use clearcase instead of PVCS.? The scripts checkout the following from PVCS: Java code Powerbuilder C++ Oracle The scripts currently compile correctly, the only thing that i need would be to change the source control from PVCS to clearcase.