gnu.trove

Class TDoubleObjectHashMap

java.lang.Object

gnu.trove.THash

gnu.trove.TPrimitiveHash

gnu.trove.TDoubleHash

gnu.trove.TDoubleObjectHashMap

All Implemented Interfaces:

TDoubleHashingStrategy, java.io.Serializable, java.lang.Cloneable

public class TDoubleObjectHashMap
extends TDoubleHash
implements java.io.Serializable

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

Version:

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

Author:

Eric D. Friedman

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TDoubleObjectHashMap.EqProcedure
private class	TDoubleObjectHashMap.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.TDoubleHash

_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
TDoubleObjectHashMap() Creates a new TDoubleObjectHashMap instance with the default capacity and load factor.
TDoubleObjectHashMap(int initialCapacity) Creates a new TDoubleObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
TDoubleObjectHashMap(int initialCapacity, float loadFactor) Creates a new TDoubleObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
TDoubleObjectHashMap(int initialCapacity, float loadFactor, TDoubleHashingStrategy strategy) Creates a new TDoubleObjectHashMap instance with a prime value at or near the specified capacity and load factor.
TDoubleObjectHashMap(int initialCapacity, TDoubleHashingStrategy strategy) Creates a new TDoubleObjectHashMap instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.
TDoubleObjectHashMap(TDoubleHashingStrategy strategy) Creates a new TDoubleObjectHashMap 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(double 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(TDoubleObjectProcedure procedure) Executes procedure for each key/value entry in the map.
boolean	forEachKey(TDoubleProcedure 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(double key) retrieves the value for key
java.lang.Object[]	getValues() Returns the values of the map.
int	hashCode()
TDoubleObjectIterator	iterator()
double[]	keys() returns the keys of the map.
java.lang.Object	put(double 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(double key) Deletes a key/value pair from the map.
protected void	removeAt(int index) removes the mapping at index from the map.
boolean	retainEntries(TDoubleObjectProcedure 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.TDoubleHash

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

TDoubleObjectHashMap

public TDoubleObjectHashMap()

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

TDoubleObjectHashMap

public TDoubleObjectHashMap(int initialCapacity)

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

Parameters:

initialCapacity - an int value

TDoubleObjectHashMap

public TDoubleObjectHashMap(int initialCapacity,
                    float loadFactor)

Creates a new TDoubleObjectHashMap 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

TDoubleObjectHashMap

public TDoubleObjectHashMap(TDoubleHashingStrategy strategy)

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

Parameters:

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

TDoubleObjectHashMap

public TDoubleObjectHashMap(int initialCapacity,
                    TDoubleHashingStrategy strategy)

Creates a new TDoubleObjectHashMap 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.

TDoubleObjectHashMap

public TDoubleObjectHashMap(int initialCapacity,
                    float loadFactor,
                    TDoubleHashingStrategy strategy)

Creates a new TDoubleObjectHashMap 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 TDoubleHash

Returns:

a deep clone of this collection

iterator

public TDoubleObjectIterator iterator()

Returns:

a TDoubleObjectIterator 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 TDoubleHash

Parameters:

initialCapacity - an int value

Returns:

the actual capacity chosen

put

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

Inserts a key/value pair into the map.

Parameters:

key - an double 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(double key)

retrieves the value for key

Parameters:

key - an double 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(double key)

Deletes a key/value pair from the map.

Parameters:

key - an double 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 TDoubleHash

Parameters:

index - an int value

getValues

public java.lang.Object[] getValues()

Returns the values of the map.

Returns:

a Collection value

keys

public double[] 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(double key)

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

Parameters:

key - an double value

Returns:

a boolean value

forEachKey

public boolean forEachKey(TDoubleProcedure procedure)

Executes procedure for each key in the map.

Parameters:

procedure - a TDoubleProcedure 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(TDoubleObjectProcedure procedure)

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

Parameters:

procedure - a TODoubleObjectProcedure value

Returns:

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

retainEntries

public boolean retainEntries(TDoubleObjectProcedure 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