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

Packages that use WritableComparable

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.util.bloom

Uses of WritableComparable in org.apache.hadoop.io

Classes in org.apache.hadoop.io with type parameters of type WritableComparable

Modifier and Type	Class	Description
class	SortedMapWritable<K extends WritableComparable<? super K>>	A Writable SortedMap.

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

Modifier and Type	Class	Description
class	BooleanWritable	A WritableComparable for booleans.
class	BytesWritable	A byte sequence that is usable as a key or value.
class	ByteWritable	A WritableComparable for a single byte.
class	DoubleWritable	Writable for Double values.
class	FloatWritable	A WritableComparable for floats.
class	IntWritable	A WritableComparable for ints.
class	LongWritable	A WritableComparable for longs.
class	MD5Hash	A Writable for MD5 hash values.
class	NullWritable	Singleton Writable with no data.
class	ShortWritable	A WritableComparable for shorts.
class	Text	This class stores text using standard UTF8 encoding.
class	UTF8	Deprecated. replaced by Text
class	VIntWritable	A WritableComparable for integer values stored in variable-length format.
class	VLongWritable	A WritableComparable for longs in a variable-length format.

Methods in org.apache.hadoop.io that return WritableComparable

Modifier and Type	Method	Description
WritableComparable	SetFile.Reader.get(WritableComparable key)	Read the matching key from a set into key.
WritableComparable	MapFile.Reader.getClosest(WritableComparable key, Writable val)	Finds the record that is the closest match to the specified key.
WritableComparable	MapFile.Reader.getClosest(WritableComparable key, Writable val, boolean before)	Finds the record that is the closest match to the specified key.
WritableComparable	MapFile.Reader.midKey()	Get the key at approximately the middle of the file.
WritableComparable	WritableComparator.newKey()	Construct a new WritableComparable instance.

Methods in org.apache.hadoop.io that return types with arguments of type WritableComparable

Modifier and Type	Method	Description
java.lang.Class<? extends WritableComparable>	WritableComparator.getKeyClass()	Returns the WritableComparable implementation class.

Methods in org.apache.hadoop.io with parameters of type WritableComparable

Modifier and Type	Method	Description
void	BloomMapFile.Writer.append(WritableComparable key, Writable val)
void	MapFile.Writer.append(WritableComparable key, Writable val)	Append a key/value pair to the map.
void	SetFile.Writer.append(WritableComparable key)	Append a key to a set.
int	LongWritable.DecreasingComparator.compare(WritableComparable a, WritableComparable b)
int	WritableComparator.compare(WritableComparable a, WritableComparable b)	Compare two WritableComparables.
void	MapFile.Reader.finalKey(WritableComparable key)	Reads the final key from the file.
Writable	BloomMapFile.Reader.get(WritableComparable key, Writable val)	Fast version of the MapFile.Reader.get(WritableComparable, Writable) method.
Writable	MapFile.Reader.get(WritableComparable key, Writable val)	Return the value for the named key, or null if none exists.
WritableComparable	SetFile.Reader.get(WritableComparable key)	Read the matching key from a set into key.
WritableComparable	MapFile.Reader.getClosest(WritableComparable key, Writable val)	Finds the record that is the closest match to the specified key.
WritableComparable	MapFile.Reader.getClosest(WritableComparable key, Writable val, boolean before)	Finds the record that is the closest match to the specified key.
boolean	MapFile.Reader.next(WritableComparable key, Writable val)	Read the next key/value pair in the map into key and val.
boolean	SetFile.Reader.next(WritableComparable key)	Read the next key in a set into key.
boolean	BloomMapFile.Reader.probablyHasKey(WritableComparable key)	Checks if this MapFile has the indicated key.
boolean	MapFile.Reader.seek(WritableComparable key)	Positions the reader at the named key, or if none such exists, at the first entry after the named key.
boolean	SetFile.Reader.seek(WritableComparable key)

Method parameters in org.apache.hadoop.io with type arguments of type WritableComparable

Modifier and Type	Method	Description
static WritableComparator	WritableComparator.get(java.lang.Class<? extends WritableComparable> c)	For backwards compatibility.
static WritableComparator	WritableComparator.get(java.lang.Class<? extends WritableComparable> c, Configuration conf)	Get a comparator for a WritableComparable implementation.
static MapFile.Writer.Option	MapFile.Writer.keyClass(java.lang.Class<? extends WritableComparable> value)

Constructor parameters in org.apache.hadoop.io with type arguments of type WritableComparable

Constructor	Description
Sorter(FileSystem fs, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, Configuration conf)	Sort and merge files containing the named classes.
WritableComparator(java.lang.Class<? extends WritableComparable> keyClass)	Construct for a WritableComparable implementation.
WritableComparator(java.lang.Class<? extends WritableComparable> keyClass, boolean createInstances)
WritableComparator(java.lang.Class<? extends WritableComparable> keyClass, Configuration conf, boolean createInstances)
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass)	Deprecated.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class<? extends Writable> valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)	Deprecated.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, SequenceFile.CompressionType compress)	Deprecated.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, SequenceFile.CompressionType compress, Progressable progress)	Deprecated.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass)	Deprecated. Use Writer(Configuration, Path, Option...) instead.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, SequenceFile.CompressionType compress)	Deprecated. Use Writer(Configuration, Path, Option...) instead.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, SequenceFile.CompressionType compress, CompressionCodec codec, Progressable progress)	Deprecated. Use Writer(Configuration, Path, Option...) instead.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, java.lang.Class valClass, SequenceFile.CompressionType compress, Progressable progress)	Deprecated. Use Writer(Configuration, Path, Option...) instead.
Writer(Configuration conf, FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass, SequenceFile.CompressionType compress)	Create a set naming the element class and compression type.
Writer(FileSystem fs, java.lang.String dirName, java.lang.Class<? extends WritableComparable> keyClass)	Deprecated. pass a Configuration too

Uses of WritableComparable in org.apache.hadoop.util.bloom

Classes in org.apache.hadoop.util.bloom that implement WritableComparable

Modifier and Type	Class	Description
class	Key	The general behavior of a key that must be stored in a filter.