try
{
SourceInclusionScanner scanner = new StaleSourceScanner( staleMillis, getIncludes(), excludes );
if ( getTimestampDirectory().exists() )
{
scanner.addSourceMapping( new SingleTargetSourceMapping( ".class", getTimestampFile().getPath() ) );
}
else
{
scanner.addSourceMapping( new SuffixMapping( ".class", ".dummy" ) );
}