GNU Trove

gnu.trove
Class TDoubleObjectHashMap

java.lang.Object
  |
  +--gnu.trove.THash
        |
        +--gnu.trove.TPrimitiveHash
              |
              +--gnu.trove.TDoubleHash
                    |
                    +--gnu.trove.TDoubleObjectHashMap
All Implemented Interfaces:
java.lang.Cloneable, java.io.Serializable, TDoubleHashingStrategy

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 1.15 2003/11/21 17:32:30 ericdf Exp $
Author:
Eric D. Friedman
See Also:
Serialized Form

Field Summary
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
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
 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.
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.
 
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, or null if no mapping for key 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 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

GNU Trove

GNU Trove is copyright 2001-2003 Eric D. Friedman. All Rights Reserved.