custom task extending MatchingTask

[Mark Lybarger <Ma...@CBC-Companies.com>]

i've got a custom task that is currently extending the MatchingTask. this task generates some source code based on an xml file.  my trouble is that it generates the source code every time, even when the base xml file hasn't been changed since the generated source files.  

does anyone know of a similar task that exists that i could see an example on how to restrict  my task from executing based on the timestamps of one input file that doesn't match up to one output file? i have
myInputfile.xml -> myClass.java, myClass2.java, etc.

thanks!