public boolean matches() {
    return matches;
  }
Helper class to match hive filenames and extract taskId, taskAttemptId, copyIndex.

Matches following:
00001_02
00001_02.gz
00001_02.zlib.gz
00001_02_copy_1
00001_02_copy_1.gz
<p>
All the components are here:
tmp_(taskPrefix)00001_02_copy_1.zlib.gz
ql/src/java/org/apache/hadoop/hive/ql/exec/ParsedOutputFileName.java