org.apache.hadoop.io

Class SortedMapWritable<K extends WritableComparable<? super K>>

java.lang.Object

org.apache.hadoop.io.AbstractMapWritable

org.apache.hadoop.io.SortedMapWritable<K>

All Implemented Interfaces:

Map<K,Writable>, SortedMap<K,Writable>, Configurable, Writable

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class SortedMapWritable<K extends WritableComparable<? super K>>
extends AbstractMapWritable
implements SortedMap<K,Writable>

A Writable SortedMap.

Constructor Summary

Constructors

Constructor and Description
SortedMapWritable() default constructor.
SortedMapWritable(SortedMapWritable<K> other) Copy constructor.

Method Summary

Modifier and Type	Method and Description
void	clear()
Comparator<? super K>	comparator()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,Writable>>	entrySet()
boolean	equals(Object obj)
K	firstKey()
Writable	get(Object key)
int	hashCode()
SortedMap<K,Writable>	headMap(K toKey)
boolean	isEmpty()
Set<K>	keySet()
K	lastKey()
Writable	put(K key, Writable value)
void	putAll(Map<? extends K,? extends Writable> t)
void	readFields(DataInput in) Deserialize the fields of this object from in.
Writable	remove(Object key)
int	size()
SortedMap<K,Writable>	subMap(K fromKey, K toKey)
SortedMap<K,Writable>	tailMap(K fromKey)
Collection<Writable>	values()
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class org.apache.hadoop.io.AbstractMapWritable

addToMap, copy, getClass, getConf, getId, setConf

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

SortedMapWritable

public SortedMapWritable()

default constructor.

SortedMapWritable

public SortedMapWritable(SortedMapWritable<K> other)

Copy constructor.

Parameters:

other - the map to copy from

Method Detail

comparator

public Comparator<? super K> comparator()

Specified by:

comparator in interface SortedMap<K extends WritableComparable<? super K>,Writable>

firstKey

public K firstKey()

Specified by:

firstKey in interface SortedMap<K extends WritableComparable<? super K>,Writable>

headMap

public SortedMap<K,Writable> headMap(K toKey)

Specified by:

headMap in interface SortedMap<K extends WritableComparable<? super K>,Writable>

lastKey

public K lastKey()

Specified by:

lastKey in interface SortedMap<K extends WritableComparable<? super K>,Writable>

subMap

public SortedMap<K,Writable> subMap(K fromKey,
                                    K toKey)

Specified by:

subMap in interface SortedMap<K extends WritableComparable<? super K>,Writable>

tailMap

public SortedMap<K,Writable> tailMap(K fromKey)

Specified by:

tailMap in interface SortedMap<K extends WritableComparable<? super K>,Writable>

clear

public void clear()

Specified by:

clear in interface Map<K extends WritableComparable<? super K>,Writable>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K extends WritableComparable<? super K>,Writable>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K extends WritableComparable<? super K>,Writable>

entrySet

public Set<Map.Entry<K,Writable>> entrySet()

Specified by:

entrySet in interface Map<K extends WritableComparable<? super K>,Writable>

Specified by:

entrySet in interface SortedMap<K extends WritableComparable<? super K>,Writable>

get

public Writable get(Object key)

Specified by:

get in interface Map<K extends WritableComparable<? super K>,Writable>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K extends WritableComparable<? super K>,Writable>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K extends WritableComparable<? super K>,Writable>

Specified by:

keySet in interface SortedMap<K extends WritableComparable<? super K>,Writable>

put

public Writable put(K key,
                    Writable value)

Specified by:

put in interface Map<K extends WritableComparable<? super K>,Writable>

putAll

public void putAll(Map<? extends K,? extends Writable> t)

Specified by:

putAll in interface Map<K extends WritableComparable<? super K>,Writable>

remove

public Writable remove(Object key)

Specified by:

remove in interface Map<K extends WritableComparable<? super K>,Writable>

size

public int size()

Specified by:

size in interface Map<K extends WritableComparable<? super K>,Writable>

values

public Collection<Writable> values()

Specified by:

values in interface Map<K extends WritableComparable<? super K>,Writable>

Specified by:

values in interface SortedMap<K extends WritableComparable<? super K>,Writable>

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Overrides:

readFields in class AbstractMapWritable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Overrides:

write in class AbstractMapWritable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

equals

public boolean equals(Object obj)

Specified by:

equals in interface Map<K extends WritableComparable<? super K>,Writable>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K extends WritableComparable<? super K>,Writable>

Overrides:

hashCode in class Object