Uses of Interface
org.apache.hadoop.io.RawComparator

Packages that use RawComparator

Package	Description
org.apache.hadoop.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.io.serializer	This package provides a mechanism for using different serialization frameworks in Hadoop.
org.apache.hadoop.mapred
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.partition
org.apache.hadoop.record	(DEPRECATED) Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner.

Uses of RawComparator in org.apache.hadoop.io

Classes in org.apache.hadoop.io that implement RawComparator

Modifier and Type	Class and Description
class	WritableComparator A Comparator for WritableComparables.

Uses of RawComparator in org.apache.hadoop.io.serializer

Classes in org.apache.hadoop.io.serializer that implement RawComparator

Modifier and Type	Class and Description
class	org.apache.hadoop.io.serializer.DeserializerComparator<T> A RawComparator that uses a Deserializer to deserialize the objects to be compared so that the standard Comparator can be used to compare them.
class	JavaSerializationComparator<T extends Serializable & Comparable<T>> A RawComparator that uses a JavaSerialization Deserializer to deserialize objects that are then compared via their Comparable interfaces.

Uses of RawComparator in org.apache.hadoop.mapred

Methods in org.apache.hadoop.mapred that return RawComparator

Modifier and Type	Method and Description
RawComparator	JobConf.getCombinerKeyGroupingComparator() Get the user defined WritableComparable comparator for grouping keys of inputs to the combiner.
RawComparator	JobConf.getOutputKeyComparator() Get the RawComparator comparator used to compare keys.
RawComparator	JobConf.getOutputValueGroupingComparator() Get the user defined WritableComparable comparator for grouping keys of inputs to the reduce.

Method parameters in org.apache.hadoop.mapred with type arguments of type RawComparator

Modifier and Type	Method and Description
void	JobConf.setCombinerKeyGroupingComparator(Class<? extends RawComparator> theClass) Set the user defined RawComparator comparator for grouping keys in the input to the combiner.
void	JobConf.setOutputKeyComparatorClass(Class<? extends RawComparator> theClass) Set the RawComparator comparator used to compare keys.
void	JobConf.setOutputValueGroupingComparator(Class<? extends RawComparator> theClass) Set the user defined RawComparator comparator for grouping keys in the input to the reduce.

Uses of RawComparator in org.apache.hadoop.mapreduce

Methods in org.apache.hadoop.mapreduce that return RawComparator

Modifier and Type	Method and Description
RawComparator<?>	JobContext.getCombinerKeyGroupingComparator() Get the user defined RawComparator comparator for grouping keys of inputs to the combiner.
RawComparator<?>	JobContext.getGroupingComparator() Get the user defined RawComparator comparator for grouping keys of inputs to the reduce.
RawComparator<?>	JobContext.getSortComparator() Get the RawComparator comparator used to compare keys.

Method parameters in org.apache.hadoop.mapreduce with type arguments of type RawComparator

Modifier and Type	Method and Description
void	Job.setCombinerKeyGroupingComparatorClass(Class<? extends RawComparator> cls) Define the comparator that controls which keys are grouped together for a single call to combiner, Reducer.reduce(Object, Iterable, org.apache.hadoop.mapreduce.Reducer.Context)
void	Job.setGroupingComparatorClass(Class<? extends RawComparator> cls) Define the comparator that controls which keys are grouped together for a single call to Reducer.reduce(Object, Iterable, org.apache.hadoop.mapreduce.Reducer.Context)
void	Job.setSortComparatorClass(Class<? extends RawComparator> cls) Define the comparator that controls how the keys are sorted before they are passed to the Reducer.

Uses of RawComparator in org.apache.hadoop.mapreduce.lib.partition

Classes in org.apache.hadoop.mapreduce.lib.partition that implement RawComparator

Modifier and Type	Class and Description
class	KeyFieldBasedComparator<K,V> This comparator implementation provides a subset of the features provided by the Unix/GNU Sort.

Uses of RawComparator in org.apache.hadoop.record

Classes in org.apache.hadoop.record that implement RawComparator

Modifier and Type	Class and Description
class	RecordComparator Deprecated. Replaced by Avro.