gnu.trove

Class TIntObjectHashMap

java.lang.Object

gnu.trove.THash

gnu.trove.TPrimitiveHash

gnu.trove.TIntHash

gnu.trove.TIntObjectHashMap

All Implemented Interfaces:

TIntHashingStrategy, java.io.Serializable, java.lang.Cloneable

public class TIntObjectHashMap
extends TIntHash
implements java.io.Serializable

An open addressed Map implementation for int keys and Object values. Created: Sun Nov 4 08:52:45 2001

Version:

$Id: TIntObjectHashMap.java,v 1.14 2003/03/19 04:17:04 ericdf Exp $

Author:

Eric D. Friedman

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TIntObjectHashMap.EqProcedure
private class	TIntObjectHashMap.HashProcedure

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object[]	_values the values of the map

Fields inherited from class gnu.trove.TIntHash

_hashingStrategy, _set

Fields inherited from class gnu.trove.TPrimitiveHash

_states, FREE, FULL, REMOVED

Fields inherited from class gnu.trove.THash

_free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR

Constructor Summary

Constructors

Constructor and Description
TIntObjectHashMap() Creates a new TIntObjectHashMap instance with the default capacity and load factor.
TIntObjectHashMap(int initialCapacity) Creates a new TIntObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
TIntObjectHashMap(int initialCapacity, float loadFactor) Creates a new TIntObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
TIntObjectHashMap(int initialCapacity, float loadFactor, TIntHashingStrategy strategy) Creates a new TIntObjectHashMap instance with a prime value at or near the specified capacity and load factor.
TIntObjectHashMap(int initialCapacity, TIntHashingStrategy strategy) Creates a new TIntObjectHashMap instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.
TIntObjectHashMap(TIntHashingStrategy strategy) Creates a new TIntObjectHashMap instance with the default capacity and load factor.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Empties the map.
java.lang.Object	clone()
boolean	containsKey(int key) checks for the present of key in the keys of the map.
boolean	containsValue(java.lang.Object val) checks for the presence of val in the values of the map.
boolean	equals(java.lang.Object other) Compares this map with another map for equality of their stored entries.
boolean	forEachEntry(TIntObjectProcedure procedure) Executes procedure for each key/value entry in the map.
boolean	forEachKey(TIntProcedure procedure) Executes procedure for each key in the map.
boolean	forEachValue(TObjectProcedure procedure) Executes procedure for each value in the map.
java.lang.Object	get(int key) retrieves the value for key
java.lang.Object[]	getValues() Returns the values of the map.
int	hashCode()
TIntObjectIterator	iterator()
int[]	keys() returns the keys of the map.
java.lang.Object	put(int key, java.lang.Object value) Inserts a key/value pair into the map.
private void	readObject(java.io.ObjectInputStream stream)
protected void	rehash(int newCapacity) rehashes the map to the new capacity.
java.lang.Object	remove(int key) Deletes a key/value pair from the map.
protected void	removeAt(int index) removes the mapping at index from the map.
boolean	retainEntries(TIntObjectProcedure procedure) Retains only those entries in the map for which the procedure returns a true value.
protected int	setUp(int initialCapacity) initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
void	transformValues(TObjectFunction function) Transform the values in this map using function.
private void	writeObject(java.io.ObjectOutputStream stream)

Methods inherited from class gnu.trove.TIntHash

computeHashCode, contains, forEach, index, insertionIndex

Methods inherited from class gnu.trove.TPrimitiveHash

capacity

Methods inherited from class gnu.trove.THash

compact, ensureCapacity, isEmpty, postInsertHook, size, trimToSize

Methods inherited from class java.lang.Object

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

Field Detail

_values

protected transient java.lang.Object[] _values

the values of the map

Constructor Detail

TIntObjectHashMap

public TIntObjectHashMap()

Creates a new TIntObjectHashMap instance with the default capacity and load factor.

TIntObjectHashMap

public TIntObjectHashMap(int initialCapacity)

Creates a new TIntObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.

Parameters:

initialCapacity - an int value

TIntObjectHashMap

public TIntObjectHashMap(int initialCapacity,
                 float loadFactor)

Creates a new TIntObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.

Parameters:

initialCapacity - an int value

loadFactor - a float value

TIntObjectHashMap

public TIntObjectHashMap(TIntHashingStrategy strategy)

Creates a new TIntObjectHashMap instance with the default capacity and load factor.

Parameters:

strategy - used to compute hash codes and to compare keys.

TIntObjectHashMap

public TIntObjectHashMap(int initialCapacity,
                 TIntHashingStrategy strategy)

Creates a new TIntObjectHashMap instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.

Parameters:

initialCapacity - an int value

strategy - used to compute hash codes and to compare keys.

TIntObjectHashMap

public TIntObjectHashMap(int initialCapacity,
                 float loadFactor,
                 TIntHashingStrategy strategy)

Creates a new TIntObjectHashMap instance with a prime value at or near the specified capacity and load factor.

Parameters:

initialCapacity - used to find a prime capacity for the table.

loadFactor - used to calculate the threshold over which rehashing takes place.

strategy - used to compute hash codes and to compare keys.

Method Detail

clone

public java.lang.Object clone()

Overrides:

clone in class TIntHash

Returns:

a deep clone of this collection

iterator

public TIntObjectIterator iterator()

Returns:

a TIntObjectIterator with access to this map's keys and values

setUp

protected int setUp(int initialCapacity)

initializes the hashtable to a prime capacity which is at least initialCapacity + 1.

Overrides:

setUp in class TIntHash

Parameters:

initialCapacity - an int value

Returns:

the actual capacity chosen

put

public java.lang.Object put(int key,
                   java.lang.Object value)

Inserts a key/value pair into the map.

Parameters:

key - an int value

value - an Object value

Returns:

the previous value associated with key, or null if none was found.

rehash

protected void rehash(int newCapacity)

rehashes the map to the new capacity.

Specified by:

rehash in class THash

Parameters:

newCapacity - an int value

get

public java.lang.Object get(int key)

retrieves the value for key

Parameters:

key - an int value

Returns:

the value of key or null if no such mapping exists.

clear

public void clear()

Empties the map.

Overrides:

clear in class THash

remove

public java.lang.Object remove(int key)

Deletes a key/value pair from the map.

Parameters:

key - an int value

Returns:

an Object value

equals

public boolean equals(java.lang.Object other)

Compares this map with another map for equality of their stored entries.

Overrides:

equals in class java.lang.Object

Parameters:

other - an Object value

Returns:

a boolean value

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

removeAt

protected void removeAt(int index)

removes the mapping at index from the map.

Overrides:

removeAt in class TIntHash

Parameters:

index - an int value

getValues

public java.lang.Object[] getValues()

Returns the values of the map.

Returns:

a Collection value

keys

public int[] keys()

returns the keys of the map.

Returns:

a Set value

containsValue

public boolean containsValue(java.lang.Object val)

checks for the presence of val in the values of the map.

Parameters:

val - an Object value

Returns:

a boolean value

containsKey

public boolean containsKey(int key)

checks for the present of key in the keys of the map.

Parameters:

key - an int value

Returns:

a boolean value

forEachKey

public boolean forEachKey(TIntProcedure procedure)

Executes procedure for each key in the map.

Parameters:

procedure - a TIntProcedure value

Returns:

false if the loop over the keys terminated because the procedure returned false for some key.

forEachValue

public boolean forEachValue(TObjectProcedure procedure)

Executes procedure for each value in the map.

Parameters:

procedure - a TObjectProcedure value

Returns:

false if the loop over the values terminated because the procedure returned false for some value.

forEachEntry

public boolean forEachEntry(TIntObjectProcedure procedure)

Executes procedure for each key/value entry in the map.

Parameters:

procedure - a TOIntObjectProcedure value

Returns:

false if the loop over the entries terminated because the procedure returned false for some entry.

retainEntries

public boolean retainEntries(TIntObjectProcedure procedure)

Retains only those entries in the map for which the procedure returns a true value.

Parameters:

procedure - determines which entries to keep

Returns:

true if the map was modified.

transformValues

public void transformValues(TObjectFunction function)

Transform the values in this map using function.

Parameters:

function - a TObjectFunction value

writeObject

private void writeObject(java.io.ObjectOutputStream stream)
                  throws java.io.IOException

Throws:

java.io.IOException

readObject

private void readObject(java.io.ObjectInputStream stream)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException