gnu.trove
Class TIntObjectHashMap<V>

java.lang.Object
  gnu.trove.THash
      gnu.trove.TPrimitiveHash
          gnu.trove.TIntHash
              gnu.trove.TIntObjectHashMap<V>

All Implemented Interfaces:

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

public class TIntObjectHashMap<V>
extends TIntHash
implements java.io.Externalizable

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

Author:

Eric D. Friedman

See Also:

Serialized Form

Field Summary

protected V[]

_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

_autoCompactionFactor, _autoCompactRemovesRemaining, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR

Constructor Summary

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

void	clear() Empties the map.
TIntObjectHashMap<V>	clone()
boolean	containsKey(int key) checks for the present of key in the keys of the map.
boolean	containsValue(V 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<V> 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<V> procedure) Executes procedure for each value in the map.
V	get(int key) retrieves the value for key
java.lang.Object[]	getValues() Returns the values of the map.
<T> T[]	getValues(T[] a) Return the values of the map; the runtime type of the returned array is that of the specified array.
int	hashCode()
TIntObjectIterator<V>	iterator()
int[]	keys() returns the keys of the map.
V	put(int key, V value) Inserts a key/value pair into the map.
V	putIfAbsent(int key, V value) Inserts a key/value pair into the map if the specified key is not already associated with a value.
void	readExternal(java.io.ObjectInput in)
protected void	rehash(int newCapacity) rehashes the map to the new capacity.
V	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<V> 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<V,V> function) Transform the values in this map using function.
void	writeExternal(java.io.ObjectOutput out)

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

calculateGrownCapacity, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize

Methods inherited from class java.lang.Object

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

Field Detail

_values

protected transient V[] _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 TIntObjectHashMap<V> clone()

Overrides:

clone in class TIntHash

Returns:

a deep clone of this collection

iterator

public TIntObjectIterator<V> 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 V put(int key,
             V 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.

putIfAbsent

public V putIfAbsent(int key,
                     V value)

Inserts a key/value pair into the map if the specified key is not already associated with a value.

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 V get(int key)

retrieves the value for key

Parameters:

key - an int value

Returns:

the value of key or (int)0 if no such mapping exists.

clear

public void clear()

Empties the map.

Overrides:

clear in class THash

remove

public V remove(int key)

Deletes a key/value pair from the map.

Parameters:

key - an int value

Returns:

an Object value or (int)0 if no such mapping exists.

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

See Also:

getValues(Object[])

getValues

public <T> T[] getValues(T[] a)

Return the values of the map; the runtime type of the returned array is that of the specified array.

Parameters:

a - the array into which the elements of this collection are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.

Returns:

an array containing the elements of this collection

Throws:

java.lang.ArrayStoreException - the runtime type of the specified array is not a supertype of the runtime type of every element in this collection.

java.lang.NullPointerException - if the specified array is null.

See Also:

getValues()

keys

public int[] keys()

returns the keys of the map.

Returns:

a Set value

containsValue

public boolean containsValue(V 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<V> 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<V> 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<V> 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<V,V> function)

Transform the values in this map using function.

Parameters:

function - a TObjectFunction value

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Overrides:

writeExternal in class THash

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Overrides:

readExternal in class THash

Throws:

java.io.IOException

java.lang.ClassNotFoundException