edu.umd.cloud9.io.fastuil
Class Int2IntOpenHashMapWritable

java.lang.Object
  it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
      it.unimi.dsi.fastutil.ints.AbstractInt2IntMap
          it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap
              edu.umd.cloud9.io.fastuil.Int2IntOpenHashMapWritable

All Implemented Interfaces:

Function<Integer,Integer>, Hash, Int2IntFunction, Int2IntMap, Serializable, Cloneable, Map<Integer,Integer>, Writable

public class Int2IntOpenHashMapWritable
extends Int2IntOpenHashMap
implements Writable

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntMap

AbstractInt2IntMap.BasicEntry

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.Hash

Hash.Strategy<K>

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.ints.Int2IntMap

Int2IntMap.Entry, Int2IntMap.FastEntrySet

Field Summary

Fields inherited from interface it.unimi.dsi.fastutil.Hash

DEFAULT_GROWTH_FACTOR, DEFAULT_INITIAL_SIZE, DEFAULT_LOAD_FACTOR, FAST_LOAD_FACTOR, FREE, OCCUPIED, PRIMES, REMOVED, VERY_FAST_LOAD_FACTOR

Constructor Summary

Int2IntOpenHashMapWritable()
Creates an Int2IntOpenHashMapWritable object.

Method Summary

static Int2IntOpenHashMapWritable	create(byte[] bytes) Returns the serialized representation of this object as a byte array.
static Int2IntOpenHashMapWritable	create(DataInput in) Creates an Int2IntOpenHashMapWritable object from a DataInput.
void	decode() In lazy decoding mode, populates the map with deserialized data.
int	dot(Int2IntOpenHashMapWritable m) Computes the dot product of this map with another map.
Int2IntMap.Entry[]	getEntriesSortedByValue() Returns entries sorted by descending value.
Int2IntMap.Entry[]	getEntriesSortedByValue(int k) Returns top k entries sorted by descending value.
int[]	getKeys() In lazy decoding mode, returns an array of all the keys if the map hasn't been decoded yet.
static boolean	getLazyDecodeFlag() Returns the value of the lazy decoding flag
int[]	getValues() In lazy decoding mode, returns an array of all the values if the map hasn't been decoded yet.
boolean	hasBeenDecoded()
void	increment(int key) Increments the key.
void	lazyplus(Int2IntOpenHashMapWritable m) In lazy decoding mode, adds values from keys of another map to this map.
void	plus(Int2IntOpenHashMapWritable m) Adds values of keys from another map to this map.
void	readFields(DataInput in) Deserializes the map.
byte[]	serialize() Returns the serialized representation of this object as a byte array.
static void	setLazyDecodeFlag(boolean b) Sets the lazy decoding flag.
void	write(DataOutput out) Serializes the map.

Methods inherited from class it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap

clear, clone, containsKey, containsValue, get, get, growthFactor, growthFactor, hashCode, int2IntEntrySet, isEmpty, keySet, put, put, rehash, remove, remove, size, trim, trim, values

Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntMap

containsValue, entrySet, equals, putAll, toString

Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction

containsKey, defaultReturnValue, defaultReturnValue, get

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2IntFunction

defaultReturnValue, defaultReturnValue

Methods inherited from interface it.unimi.dsi.fastutil.Function

containsKey, get

Methods inherited from interface java.util.Map

containsKey, get

Constructor Detail

Int2IntOpenHashMapWritable

public Int2IntOpenHashMapWritable()

Creates an Int2IntOpenHashMapWritable object.

Method Detail

readFields

public void readFields(DataInput in)
                throws IOException

Deserializes the map.

Specified by:

readFields in interface Writable

Parameters:

in - source for raw byte representation

Throws:

IOException

decode

public void decode()

In lazy decoding mode, populates the map with deserialized data. Otherwise, does nothing.

hasBeenDecoded

public boolean hasBeenDecoded()

write

public void write(DataOutput out)
           throws IOException

Serializes the map.

Specified by:

write in interface Writable

Parameters:

out - where to write the raw byte representation

Throws:

IOException

serialize

public byte[] serialize()
                 throws IOException

Returns the serialized representation of this object as a byte array.

Returns:

byte array representing the serialized representation of this object

Throws:

IOException

create

public static Int2IntOpenHashMapWritable create(DataInput in)
                                         throws IOException

Creates an Int2IntOpenHashMapWritable object from a DataInput.

Parameters:

in - DataInput for reading the serialized representation

Returns:

a newly-created OHMapSIW object

Throws:

IOException

create

public static Int2IntOpenHashMapWritable create(byte[] bytes)
                                         throws IOException

Returns the serialized representation of this object as a byte array.

Returns:

byte array representing the serialized representation of this object

Throws:

IOException

plus

public void plus(Int2IntOpenHashMapWritable m)

Adds values of keys from another map to this map.

Parameters:

m - the other map

dot

public int dot(Int2IntOpenHashMapWritable m)

Computes the dot product of this map with another map.

Parameters:

m - the other map

increment

public void increment(int key)

Increments the key. If the key does not exist in the map, its value is set to one.

Parameters:

key - key to increment

setLazyDecodeFlag

public static void setLazyDecodeFlag(boolean b)

Sets the lazy decoding flag.

Parameters:

b - the value of the lazy decoding flag

getLazyDecodeFlag

public static boolean getLazyDecodeFlag()

Returns the value of the lazy decoding flag

Returns:

the value of the lazy decoding flag

getKeys

public int[] getKeys()

In lazy decoding mode, returns an array of all the keys if the map hasn't been decoded yet. Otherwise, returns null.

Returns:

an array of all the keys

getValues

public int[] getValues()

In lazy decoding mode, returns an array of all the values if the map hasn't been decoded yet. Otherwise, returns null.

Returns:

an array of all the values

lazyplus

public void lazyplus(Int2IntOpenHashMapWritable m)

In lazy decoding mode, adds values from keys of another map to this map. This map must have already been decoded, but the other map must not have been already decoded.

Parameters:

m - the other map

getEntriesSortedByValue

public Int2IntMap.Entry[] getEntriesSortedByValue()

Returns entries sorted by descending value. Ties broken by the key.

Returns:

entries sorted by descending value

getEntriesSortedByValue

public Int2IntMap.Entry[] getEntriesSortedByValue(int k)

Returns top k entries sorted by descending value. Ties broken by the key.

Parameters:

k - number of entries to return

Returns:

top k entries sorted by descending value