throws Exception {
BucketMapJoinContext bucketMatcherCxt = this.work.getBucketMapjoinContext();
Class<? extends BucketMatcher> bucketMatcherCls = bucketMatcherCxt.getBucketMatcherClass();
BucketMatcher bucketMatcher = (BucketMatcher) ReflectionUtils.newInstance(bucketMatcherCls,
null);
bucketMatcher.setAliasBucketFileNameMapping(bucketMatcherCxt.getAliasBucketFileNameMapping());
List<Path> aliasFiles = bucketMatcher.getAliasBucketFiles(currentInputFile, bucketMatcherCxt
.getMapJoinBigTableAlias(), alias);
fetchOp.setupContext(aliasFiles);
}