Java debuging decompiled classes without line number attributes

Is there any way to debug a 3rd party Java code (library) which, as I be开发者_如何学Pythonlieve, was compiled without line number attributes? I attach a debugger to this class (decompiled in Eclipse using JadClipse) and I can set breakpoints on method entries, but cannot step through code line by line.

Maybe you can re-compile the decompiled code and debug that instead of the "real" jar?