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.crypto	Crypto related classes.
org.apache.hadoop.crypto.key.kms
org.apache.hadoop.fs	An abstract file system API.
org.apache.hadoop.fs.impl	This package contains implementation classes for use inside filesystems.
org.apache.hadoop.fs.permission	This package provides support for HDFS permission and ACL.
org.apache.hadoop.fs.store	This package is for classes to be shared across object stores; for internal use within the hadoop-* modules only.
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.file.tfile
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.ipc.internal	IPC internal classes not for any use by libraries outside the apache hadoop source tree.
org.apache.hadoop.net	Network-related classes.
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	ZooKeeper secret manager for TokenIdentifiers and DelegationKeys.
org.apache.hadoop.security.token.delegation.web
org.apache.hadoop.util	Common utilities.
org.apache.hadoop.util.bloom

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.crypto

Class	Description
ByteBufferPool

Classes in org.apache.hadoop.io used by org.apache.hadoop.crypto.key.kms

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.fs

Class	Description
ByteBufferPool
MD5Hash	A Writable for MD5 hash values.
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.impl

Class	Description
ByteBufferPool

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.store

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.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.
DataOutputBuffer	A reusable DataOutput implementation that writes to an in-memory buffer.
DoubleWritable	Writable for Double values.
ElasticByteBufferPool	This is a simple ByteBufferPool which just creates ByteBuffers as needed.
ElasticByteBufferPool.Key
FloatWritable	A WritableComparable for floats.
IntWritable	A WritableComparable for ints.
LongWritable	A WritableComparable for longs.
LongWritable.Comparator	A Comparator optimized for LongWritable.
MapFile	A file-based map from keys to values.
MapFile.Reader	Provide access to an existing map.
MapFile.Reader.Option
MapFile.Writer	Writes a new map.
MapFile.Writer.Option
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.
OutputBuffer	A reusable OutputStream implementation that writes to an in-memory buffer.
RawComparator	A Comparator that operates directly on byte representations of objects.
ReadaheadPool	Manages a pool of threads which can issue readahead requests on file descriptors.
ReadaheadPool.ReadaheadRequest	An outstanding readahead request that has been submitted to the pool.
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.Reader	Reads key/value pairs from a sequence-format file.
SequenceFile.Reader.Option	A tag interface for all of the Reader options
SequenceFile.Sorter.RawKeyValueIterator	The interface to iterate over raw keys/values of SequenceFiles.
SequenceFile.Sorter.SegmentDescriptor	This class defines a merge segment.
SequenceFile.ValueBytes	The interface to 'raw' values of SequenceFiles.
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.file.tfile

Class	Description
BytesWritable	A byte sequence that is usable as a key or value.

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
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.ipc.internal

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

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

Class	Description
LongWritable	A WritableComparable for longs.

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.security.token.delegation.web

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
IntWritable	A WritableComparable for ints.
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.bloom

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.