Uses of Package
org.apache.hadoop.io

Packages that use org.apache.hadoop.io

Package	Description
org.apache.hadoop.conf	Configuration of system parameters.
org.apache.hadoop.fs	Implementations of AbstractFileSystem for hdfs over rpc and hdfs over web.
org.apache.hadoop.fs.permission	This package provides support for HDFS permission and ACL.
org.apache.hadoop.fs.s3a.auth.delegation	Extensible delegation token support for the S3A connector.
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.ipc	Tools to help define network clients and servers.
org.apache.hadoop.mapred
org.apache.hadoop.mapred.join
org.apache.hadoop.mapred.lib
org.apache.hadoop.mapred.lib.aggregate
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapred.nativetask.serde
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.counters	This package contains the implementations of different types of map-reduce counters.
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.db
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.join
org.apache.hadoop.mapreduce.lib.map
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.mapreduce.lib.output.committer.manifest.files	Persistence formats.
org.apache.hadoop.mapreduce.lib.partition
org.apache.hadoop.mapreduce.lib.reduce
org.apache.hadoop.mapreduce.security
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.
org.apache.hadoop.security	Classes for hadoop security.
org.apache.hadoop.security.authorize	Support for service-level authorization.
org.apache.hadoop.security.token	Support for delegation tokens.
org.apache.hadoop.security.token.delegation	Router security token delegation.
org.apache.hadoop.util	Common utilities.
org.apache.hadoop.util.bloom
org.apache.hadoop.yarn.client
org.apache.hadoop.yarn.client.api
org.apache.hadoop.yarn.conf	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.logaggregation	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.security	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.security.client	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.util	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.yarn.util.timeline	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.

Classes in org.apache.hadoop.io used by org.apache.hadoop.conf

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs

Class	Description
ByteBufferPool
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs.permission

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs.s3a.auth.delegation

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io

Class	Description
AbstractMapWritable	Abstract base class for MapWritable and SortedMapWritable Unlike org.apache.nutch.crawl.MapWritable, this class allows creation of MapWritable<Writable, MapWritable> so the CLASS_TO_ID and ID_TO_CLASS maps travel with the class instead of being static.
BinaryComparable	Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.
BooleanWritable	A WritableComparable for booleans.
ByteBufferPool
BytesWritable	A byte sequence that is usable as a key or value.
ByteWritable	A WritableComparable for a single byte.
DoubleWritable	Writable for Double values.
FloatWritable	A WritableComparable for floats.
IntWritable	A WritableComparable for ints.
LongWritable	A WritableComparable for longs.
MapFile	A file-based map from keys to values.
MapWritable	A Writable Map.
MD5Hash	A Writable for MD5 hash values.
NullWritable	Singleton Writable with no data.
ObjectWritable	A polymorphic Writable that writes an instance with it's class name.
RawComparator	A Comparator that operates directly on byte representations of objects.
SequenceFile.CompressionType	The compression type used to compress key/value pairs in the SequenceFile.
SequenceFile.Metadata	The class encapsulating with the metadata of a file.
SequenceFile.Writer	Write key/value pairs to a sequence-format file.
SequenceFile.Writer.Option
ShortWritable	A WritableComparable for shorts.
SortedMapWritable	A Writable SortedMap.
Stringifier	Stringifier interface offers two methods to convert an object to a string representation and restore the object given its string representation.
Text	This class stores text using standard UTF8 encoding.
UTF8	Deprecated. replaced by Text
VIntWritable	A WritableComparable for integer values stored in variable-length format.
VLongWritable	A WritableComparable for longs in a variable-length format.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.
WritableComparator	A Comparator for WritableComparables.
WritableFactory	A factory for a class of Writable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io.serializer

Class	Description
RawComparator	A Comparator that operates directly on byte representations of objects.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.ipc

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred

Class	Description
BytesWritable	A byte sequence that is usable as a key or value.
Closeable	Deprecated. use java.io.Closeable
LongWritable	A WritableComparable for longs.
MapFile.Reader	Provide access to an existing map.
RawComparator	A Comparator that operates directly on byte representations of objects.
SequenceFile.CompressionType	The compression type used to compress key/value pairs in the SequenceFile.
SequenceFile.Reader	Reads key/value pairs from a sequence-format file.
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.join

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.
WritableComparator	A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib

Class	Description
Closeable	Deprecated. use java.io.Closeable
LongWritable	A WritableComparable for longs.
RawComparator	A Comparator that operates directly on byte representations of objects.
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparator	A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.aggregate

Class	Description
Closeable	Deprecated. use java.io.Closeable
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.db

Class	Description
LongWritable	A WritableComparable for longs.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.nativetask.serde

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce

Class	Description
RawComparator	A Comparator that operates directly on byte representations of objects.
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.counters

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.aggregate

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.db

Class	Description
LongWritable	A WritableComparable for longs.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.fieldsel

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.input

Class	Description
BytesWritable	A byte sequence that is usable as a key or value.
LongWritable	A WritableComparable for longs.
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.join

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.
WritableComparator	A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.map

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.output

Class	Description
BytesWritable	A byte sequence that is usable as a key or value.
MapFile.Reader	Provide access to an existing map.
SequenceFile.CompressionType	The compression type used to compress key/value pairs in the SequenceFile.
SequenceFile.Writer	Write key/value pairs to a sequence-format file.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.output.committer.manifest.files

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.partition

Class	Description
BinaryComparable	Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.
RawComparator	A Comparator that operates directly on byte representations of objects.
WritableComparator	A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.reduce

Class	Description
IntWritable	A WritableComparable for ints.
LongWritable	A WritableComparable for longs.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.security

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.record

Class	Description
RawComparator	A Comparator that operates directly on byte representations of objects.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.
WritableComparable	A Writable which is also Comparable.
WritableComparator	A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.authorize

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token.delegation

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util.bloom

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.client

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.client.api

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.conf

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.logaggregation

Class	Description
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.security

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.security.client

Class	Description
Text	This class stores text using standard UTF8 encoding.
Writable	A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.util

Class	Description
Text	This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.yarn.util.timeline

Class	Description
Text	This class stores text using standard UTF8 encoding.