org.apache.giraph.types.ops.collections

Class Basic2ObjectMap.BasicObject2ObjectOpenHashMap<K extends org.apache.hadoop.io.Writable,V>

java.lang.Object

org.apache.giraph.types.ops.collections.Basic2ObjectMap<K,V>

org.apache.giraph.types.ops.collections.Basic2ObjectMap.BasicObject2ObjectOpenHashMap<K,V>

All Implemented Interfaces:

org.apache.hadoop.io.Writable

Enclosing class:

Basic2ObjectMap<K,V>

public static final class Basic2ObjectMap.BasicObject2ObjectOpenHashMap<K extends org.apache.hadoop.io.Writable,V>
extends Basic2ObjectMap<K,V>

Writable implementation of Basic2ObjectMap

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.giraph.types.ops.collections.Basic2ObjectMap

Basic2ObjectMap.BasicInt2ObjectOpenHashMap<V>, Basic2ObjectMap.BasicLong2ObjectOpenHashMap<V>, Basic2ObjectMap.BasicObject2ObjectOpenHashMap<K extends org.apache.hadoop.io.Writable,V>, Basic2ObjectMap.ReusableIterator<Iter extends Iterator<?>>

Constructor Summary

Constructors

Constructor and Description
BasicObject2ObjectOpenHashMap(int capacity, WritableWriter<K> keyWriter, WritableWriter<V> valueWriter) Constructor
BasicObject2ObjectOpenHashMap(WritableWriter<K> keyWriter, WritableWriter<V> valueWriter) Constructor

Method Summary

Modifier and Type	Method and Description
void	clear() Removes all of the elements from this list.
boolean	containsKey(K key) Checks whether key is present in the map
Iterator<K>	fastKeyIterator() Fast iterator over keys within this map, which doesn't allocate new element for each returned element.
V	get(K key) Get value for a given key
PrimitiveIdTypeOps<K>	getKeyTypeOps() TypeOps for type of keys this object holds
V	put(K key, V value) Adds a pair to the map.
void	readFields(DataInput in)
V	remove(K key) Removes the mapping with the given key.
int	size() Number of elements in this list
Iterator<V>	valueIterator() Iterator over map values.
Collection<V>	values() A collection of all values.
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicObject2ObjectOpenHashMap

public BasicObject2ObjectOpenHashMap(WritableWriter<K> keyWriter,
                                     WritableWriter<V> valueWriter)

Constructor

Parameters:

keyWriter - Writer of keys

valueWriter - Writer of values

BasicObject2ObjectOpenHashMap

public BasicObject2ObjectOpenHashMap(int capacity,
                                     WritableWriter<K> keyWriter,
                                     WritableWriter<V> valueWriter)

Constructor

Parameters:

capacity - Map capacity

keyWriter - Writer of keys

valueWriter - Writer of values

Method Detail

clear

public void clear()

Description copied from class: Basic2ObjectMap

Removes all of the elements from this list.

Specified by:

clear in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

size

public int size()

Description copied from class: Basic2ObjectMap

Number of elements in this list

Specified by:

size in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Returns:

size

containsKey

public boolean containsKey(K key)

Description copied from class: Basic2ObjectMap

Checks whether key is present in the map

Specified by:

containsKey in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Parameters:

key - Key

Returns:

true if present

put

public V put(K key,
             V value)

Description copied from class: Basic2ObjectMap

Adds a pair to the map.

Specified by:

put in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Parameters:

key - Key

value - Value.

Returns:

the old value, or null if no value was present for the given key.

get

public V get(K key)

Description copied from class: Basic2ObjectMap

Get value for a given key

Specified by:

get in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Parameters:

key - Key

Returns:

Value, or null

remove

public V remove(K key)

Description copied from class: Basic2ObjectMap

Removes the mapping with the given key.

Specified by:

remove in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Parameters:

key - Key

Returns:

the old value, or null if no value was present for the given key.

getKeyTypeOps

public PrimitiveIdTypeOps<K> getKeyTypeOps()

Description copied from class: Basic2ObjectMap

TypeOps for type of keys this object holds

Specified by:

getKeyTypeOps in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Returns:

TypeOps

fastKeyIterator

public Iterator<K> fastKeyIterator()

Description copied from class: Basic2ObjectMap

Fast iterator over keys within this map, which doesn't allocate new element for each returned element. Object returned by next() is only valid until next() is called again, because it is reused.

Specified by:

fastKeyIterator in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Returns:

Iterator

valueIterator

public Iterator<V> valueIterator()

Description copied from class: Basic2ObjectMap

Iterator over map values.

Specified by:

valueIterator in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Returns:

Iterator

values

public Collection<V> values()

Description copied from class: Basic2ObjectMap

A collection of all values.

Specified by:

values in class Basic2ObjectMap<K extends org.apache.hadoop.io.Writable,V>

Returns:

Iterator

write

public void write(DataOutput out)
           throws IOException

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Throws:

IOException