Package gnu.trove
Class TObjectDoubleHashMap<K>
java.lang.Object
gnu.trove.THash
gnu.trove.TObjectHash<K>
gnu.trove.TObjectDoubleHashMap<K>
- All Implemented Interfaces:
TObjectHashingStrategy<K>
,Externalizable
,Serializable
,Cloneable
An open addressed Map implementation for Object keys and double values.
Created: Sun Nov 4 08:52:45 2001
- Author:
- Eric D. Friedman
- See Also:
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Field Summary
FieldsFields inherited from class gnu.trove.TObjectHash
_hashingStrategy, _set, FREE, REMOVED
Fields inherited from class gnu.trove.THash
_autoCompactionFactor, _autoCompactRemovesRemaining, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR
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Constructor Summary
ConstructorsConstructorDescriptionCreates a newTObjectDoubleHashMap
instance with the default capacity and load factor.TObjectDoubleHashMap
(int initialCapacity) Creates a newTObjectDoubleHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.TObjectDoubleHashMap
(int initialCapacity, float loadFactor) Creates a newTObjectDoubleHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.TObjectDoubleHashMap
(int initialCapacity, float loadFactor, TObjectHashingStrategy<K> strategy) Creates a newTObjectDoubleHashMap
instance with a prime value at or near the specified capacity and load factor.TObjectDoubleHashMap
(int initialCapacity, TObjectHashingStrategy<K> strategy) Creates a newTObjectDoubleHashMap
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TObjectDoubleHashMap
(TObjectHashingStrategy<K> strategy) Creates a newTObjectDoubleHashMap
instance with the default capacity and load factor. -
Method Summary
Modifier and TypeMethodDescriptiondouble
adjustOrPutValue
(K key, double adjust_amount, double put_amount) Adjusts the primitive value mapped to the key if the key is present in the map.boolean
adjustValue
(K key, double amount) Adjusts the primitive value mapped to key.void
clear()
Empties the map.clone()
boolean
containsKey
(K key) checks for the present of key in the keys of the map.boolean
containsValue
(double val) checks for the presence of val in the values of the map.boolean
Compares this map with another map for equality of their stored entries.boolean
forEachEntry
(TObjectDoubleProcedure<K> procedure) Executes procedure for each key/value entry in the map.boolean
forEachKey
(TObjectProcedure<K> procedure) Executes procedure for each key in the map.boolean
forEachValue
(TDoubleProcedure procedure) Executes procedure for each value in the map.double
retrieves the value for keydouble[]
Returns the values of the map.boolean
Increments the primitive value mapped to key by 1iterator()
Object[]
keys()
returns the keys of the map.K[]
returns the keys of the map.double
Inserts a key/value pair into the map.void
putAll
(TObjectDoubleHashMap<K> map) Put all the entries from the given map into this map.double
putIfAbsent
(K key, double value) Inserts a key/value pair into the map if the specified key is not already associated with a value.void
protected void
rehash
(int newCapacity) rehashes the map to the new capacity.double
Deletes a key/value pair from the map.protected void
removeAt
(int index) removes the mapping at index from the map.boolean
retainEntries
(TObjectDoubleProcedure<K> 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.toString()
void
transformValues
(TDoubleFunction function) Transform the values in this map using function.void
Methods inherited from class gnu.trove.TObjectHash
capacity, computeHashCode, contains, equals, forEach, index, insertionIndex, throwObjectContractViolation
Methods inherited from class gnu.trove.THash
calculateGrownCapacity, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
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Field Details
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_values
protected transient double[] _valuesthe values of the map
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Constructor Details
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TObjectDoubleHashMap
public TObjectDoubleHashMap()Creates a newTObjectDoubleHashMap
instance with the default capacity and load factor. -
TObjectDoubleHashMap
public TObjectDoubleHashMap(int initialCapacity) Creates a newTObjectDoubleHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.- Parameters:
initialCapacity
- anint
value
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TObjectDoubleHashMap
public TObjectDoubleHashMap(int initialCapacity, float loadFactor) Creates a newTObjectDoubleHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.- Parameters:
initialCapacity
- anint
valueloadFactor
- afloat
value
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TObjectDoubleHashMap
Creates a newTObjectDoubleHashMap
instance with the default capacity and load factor.- Parameters:
strategy
- used to compute hash codes and to compare keys.
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TObjectDoubleHashMap
Creates a newTObjectDoubleHashMap
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.- Parameters:
initialCapacity
- anint
valuestrategy
- used to compute hash codes and to compare keys.
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TObjectDoubleHashMap
public TObjectDoubleHashMap(int initialCapacity, float loadFactor, TObjectHashingStrategy<K> strategy) Creates a newTObjectDoubleHashMap
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.
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Method Details
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iterator
- Returns:
- an iterator over the entries in this map
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setUp
protected int setUp(int initialCapacity) initializes the hashtable to a prime capacity which is at least initialCapacity + 1.- Overrides:
setUp
in classTObjectHash<K>
- Parameters:
initialCapacity
- anint
value- Returns:
- the actual capacity chosen
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put
Inserts a key/value pair into the map.- Parameters:
key
- anObject
valuevalue
- andouble
value- Returns:
- the previous value associated with key, or (double)0 if none was found.
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putIfAbsent
Inserts a key/value pair into the map if the specified key is not already associated with a value.- Parameters:
key
- anObject
valuevalue
- andouble
value- Returns:
- the previous value associated with key, or (double)0 if none was found.
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putAll
Put all the entries from the given map into this map.- Parameters:
map
- The map from which entries will be obtained to put into this map.
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rehash
protected void rehash(int newCapacity) rehashes the map to the new capacity. -
get
retrieves the value for key- Parameters:
key
- anObject
value- Returns:
- the value of key or (double)0 if no such mapping exists.
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clear
public void clear()Empties the map. -
remove
Deletes a key/value pair from the map.- Parameters:
key
- anObject
value- Returns:
- an
double
value or (double)0 if no such mapping exists.
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equals
Compares this map with another map for equality of their stored entries. -
clone
- Overrides:
clone
in classTObjectHash<K>
- Returns:
- a shallow clone of this collection
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removeAt
protected void removeAt(int index) removes the mapping at index from the map.- Overrides:
removeAt
in classTObjectHash<K>
- Parameters:
index
- anint
value
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getValues
public double[] getValues()Returns the values of the map.- Returns:
- a
Collection
value
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keys
returns the keys of the map.- Returns:
- a
Set
value
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keys
returns the keys of the map.- Parameters:
a
- the array into which the elements of the list are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.- Returns:
- a
Set
value
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containsValue
public boolean containsValue(double val) checks for the presence of val in the values of the map.- Parameters:
val
- andouble
value- Returns:
- a
boolean
value
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containsKey
checks for the present of key in the keys of the map.- Parameters:
key
- anObject
value- Returns:
- a
boolean
value
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forEachKey
Executes procedure for each key in the map.- Parameters:
procedure
- aTObjectProcedure
value- Returns:
- false if the loop over the keys terminated because the procedure returned false for some key.
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forEachValue
Executes procedure for each value in the map.- Parameters:
procedure
- aTDoubleProcedure
value- Returns:
- false if the loop over the values terminated because the procedure returned false for some value.
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forEachEntry
Executes procedure for each key/value entry in the map.- Parameters:
procedure
- aTOObjectDoubleProcedure
value- Returns:
- false if the loop over the entries terminated because the procedure returned false for some entry.
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retainEntries
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.
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transformValues
Transform the values in this map using function.- Parameters:
function
- aTDoubleFunction
value
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increment
Increments the primitive value mapped to key by 1- Parameters:
key
- the key of the value to increment- Returns:
- true if a mapping was found and modified.
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adjustValue
Adjusts the primitive value mapped to key.- Parameters:
key
- the key of the value to incrementamount
- the amount to adjust the value by.- Returns:
- true if a mapping was found and modified.
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adjustOrPutValue
Adjusts the primitive value mapped to the key if the key is present in the map. Otherwise, the initial_value is put in the map.- Parameters:
key
- the key of the value to incrementadjust_amount
- the amount to adjust the value byput_amount
- the value put into the map if the key is not initial present- Returns:
- the value present in the map after the adjustment or put operation
- Since:
- 2.0b1
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writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Overrides:
writeExternal
in classTObjectHash<K>
- Throws:
IOException
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readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Overrides:
readExternal
in classTObjectHash<K>
- Throws:
IOException
ClassNotFoundException
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toString
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