org.apache.hadoop.mapreduce.lib.aggregate
Interfaces 
ValueAggregator
ValueAggregatorDescriptor
Classes 
DoubleValueSum
LongValueMax
LongValueMin
LongValueSum
StringValueMax
StringValueMin
UniqValueCount
UserDefinedValueAggregatorDescriptor
ValueAggregatorBaseDescriptor
ValueAggregatorCombiner
ValueAggregatorJob
ValueAggregatorJobBase
ValueAggregatorMapper
ValueAggregatorReducer
ValueHistogram