static void deserializeComparators(Configuration conf, TupleMRConfig mrConfig)
throws TupleMRException {
String[] comparatorRefs = conf.getStrings(CONF_COMPARATOR_REFERENCES);
String[] comparatorInstanceFiles = conf.getStrings(CONF_COMPARATOR_INSTANCES);
if (comparatorRefs == null) {
return;
}
try {
for (int i = 0; i < comparatorRefs.length; i++) {
String[] ref = comparatorRefs[i].split("\\|");
String instanceFile = comparatorInstanceFiles[i];
// Here we use "false" as last parameter because otherwise it could be
// an infinite loop. We will call setConf() later.
RawComparator<?> comparator =
InstancesDistributor.loadInstance(conf, RawComparator.class, instanceFile, false);
if (ref[0].equals(COMMON)) {
setComparator(mrConfig.getCommonCriteria(), ref[1], comparator);
} else {
setComparator(
mrConfig.getSpecificOrderBys().get(new Integer(ref[0])), ref[1], comparator);
}
}
} catch (IOException e) {
throw new TupleMRException(e);
}
}
