Uses of Package
org.apache.hadoop.io

Packages that use org.apache.hadoop.io

org.apache.hadoop.contrib.utils.join
org.apache.hadoop.dfs	A distributed implementation of FileSystem.
org.apache.hadoop.examples	Hadoop example code.
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.ipc	Tools to help define network clients and servers.
org.apache.hadoop.mapred	A system for scalable, fault-tolerant, distributed computation over large data collections.
org.apache.hadoop.mapred.lib	Library of generally useful mappers, reducers, and partitioners.
org.apache.hadoop.mapred.lib.aggregate	Classes for performing various counting and aggregations.
org.apache.hadoop.record	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.streaming
org.apache.hadoop.tools
org.apache.hadoop.util	Common utilities.

Classes in org.apache.hadoop.io used by org.apache.hadoop.contrib.utils.join

Closeable
That which can be closed.

Text
This class stores text using standard UTF8 encoding.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

Closeable
That which can be closed.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

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

DataOutputBuffer
A reusable DataOutput implementation that writes to an in-memory buffer.

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.Writer
Writes a new 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.

SequenceFile.CompressionType
The type of compression.

SequenceFile.Metadata
The class encapsulating with the metadata of a file.

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.

Text
This class stores text using standard UTF8 encoding.

UTF8
Deprecated. replaced by Text

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and 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.ipc

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

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

Closeable
That which can be closed.

MapFile.Reader
Provide access to an existing map.

SequenceFile.CompressionType
The type of compression.

SequenceFile.Reader
Reads key/value pairs from a sequence-format file.

Text
This class stores text using standard UTF8 encoding.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

WritableComparator
A Comparator for WritableComparables.

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

Closeable
That which can be closed.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

Closeable
That which can be closed.

Text
This class stores text using standard UTF8 encoding.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

WritableComparator
A Comparator for WritableComparables.

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

Closeable
That which can be closed.

Text
This class stores text using standard UTF8 encoding.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

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

Closeable
That which can be closed.

Text.Comparator
A WritableComparator optimized for Text keys.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.

WritableComparator
A Comparator for WritableComparables.

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

Closeable
That which can be closed.

IntWritable
A WritableComparable for ints.

Writable
A simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
An interface which extends both Writable and Comparable.