Uses of Class org.apache.hadoop.io.WritableComparator (Apache Hadoop Common 3.5.0 API)
Description: use: package: org.apache.hadoop.io, class: WritableComparator

# Uses of Class
org.apache.hadoop.io.WritableComparator

Packages that use WritableComparator
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.

- ## Uses of WritableComparator in org.apache.hadoop.io

  Subclasses of WritableComparator in org.apache.hadoop.io
  Modifier and Type
  Class
  Description
  `static class`
  `BooleanWritable.Comparator`
  A Comparator optimized for BooleanWritable.
  `static class`
  `BytesWritable.Comparator`
  A Comparator optimized for BytesWritable.
  `static class`
  `ByteWritable.Comparator`
  A Comparator optimized for ByteWritable.
  `static class`
  `DoubleWritable.Comparator`
  A Comparator optimized for DoubleWritable.
  `static class`
  `FloatWritable.Comparator`
  A Comparator optimized for FloatWritable.
  `static class`
  `IntWritable.Comparator`
  A Comparator optimized for IntWritable.
  `static class`
  `LongWritable.Comparator`
  A Comparator optimized for LongWritable.
  `static class`
  `LongWritable.DecreasingComparator`
  A decreasing Comparator optimized for LongWritable.
  `static class`
  `MD5Hash.Comparator`
  A WritableComparator optimized for MD5Hash keys.
  `static class`
  `NullWritable.Comparator`
  A Comparator "optimized" for NullWritable.
  `static class`
  `ShortWritable.Comparator`
  A Comparator optimized for ShortWritable.
  `static class`
  `Text.Comparator`
  A WritableComparator optimized for Text keys.
  `static class`
  `UTF8.Comparator`
  Deprecated.
  A WritableComparator optimized for UTF8 keys.
  Methods in org.apache.hadoop.io that return WritableComparator
  Modifier and Type
  Method
  Description
  `static WritableComparator`
  WritableComparator.`get(Class<? extends WritableComparable> c)`
  For backwards compatibility.
  `static WritableComparator`
  WritableComparator.`get(Class<? extends WritableComparable> c, Configuration conf)`
  Get a comparator for a `WritableComparable` implementation.
  Methods in org.apache.hadoop.io with parameters of type WritableComparator
  Modifier and Type
  Method
  Description
  `static MapFile.Reader.Option`
  MapFile.Reader.`comparator(WritableComparator value)`
  `static MapFile.Writer.Option`
  MapFile.Writer.`comparator(WritableComparator value)`
  `static void`
  WritableComparator.`define(Class c, WritableComparator comparator)`
  Register an optimized comparator for a `WritableComparable` implementation.
  `protected void`
  MapFile.Reader.`open(Path dir, WritableComparator comparator, Configuration conf, SequenceFile.Reader.Option... options)`
  Constructors in org.apache.hadoop.io with parameters of type WritableComparator
  Modifier
  Constructor
  Description
  ``
  `Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf)`
  Deprecated.
  ``
  `Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf, boolean open)`
  Deprecated.
  ``
  `Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf)`
  Deprecated.
  ``
  `Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf)`
  Construct a set reader for the named set using the named comparator.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass)`
  Deprecated.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress)`
  Deprecated.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)`
  Deprecated.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress, Progressable progress)`
  Deprecated.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass)`
  Deprecated.
  Use Writer(Configuration, Path, Option...) instead.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress)`
  Deprecated.
  Use Writer(Configuration, Path, Option...) instead.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)`
  Deprecated.
  Use Writer(Configuration, Path, Option...) instead.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, Class valClass, SequenceFile.CompressionType compress, Progressable progress)`
  Deprecated.
  Use Writer(Configuration, Path, Option...)} instead.
  ``
  `Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, SequenceFile.CompressionType compress)`
  Create a set naming the element comparator and compression type.