Package gnu.trove
Class TDoubleObjectHashMap<V>
java.lang.Object
gnu.trove.THash
gnu.trove.TPrimitiveHash
gnu.trove.TDoubleHash
gnu.trove.TDoubleObjectHashMap<V>
- All Implemented Interfaces:
TDoubleHashingStrategy
,Externalizable
,Serializable
,Cloneable
An open addressed Map implementation for double keys and Object 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.TDoubleHash
_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
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Constructor Summary
ConstructorsConstructorDescriptionCreates a newTDoubleObjectHashMap
instance with the default capacity and load factor.TDoubleObjectHashMap
(int initialCapacity) Creates a newTDoubleObjectHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.TDoubleObjectHashMap
(int initialCapacity, float loadFactor) Creates a newTDoubleObjectHashMap
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 newTDoubleObjectHashMap
instance with a prime value at or near the specified capacity and load factor.TDoubleObjectHashMap
(int initialCapacity, TDoubleHashingStrategy strategy) Creates a newTDoubleObjectHashMap
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TDoubleObjectHashMap
(TDoubleHashingStrategy strategy) Creates a newTDoubleObjectHashMap
instance with the default capacity and load factor. -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
Empties the map.clone()
boolean
containsKey
(double 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
Compares this map with another map for equality of their stored entries.boolean
forEachEntry
(TDoubleObjectProcedure<V> 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<V> procedure) Executes procedure for each value in the map.get
(double key) retrieves the value for keyObject[]
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()
iterator()
double[]
keys()
returns the keys of the map.double[]
keys
(double[] a) returns the keys of the map.Inserts a key/value pair into the map.void
putAll
(TDoubleObjectHashMap<V> map) Put all the entries from the given map into this map.putIfAbsent
(double key, V 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.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<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.toString()
void
transformValues
(TObjectFunction<V, V> function) Transform the values in this map using function.void
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
calculateGrownCapacity, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
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Field Details
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_values
the values of the map
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Constructor Details
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TDoubleObjectHashMap
public TDoubleObjectHashMap()Creates a newTDoubleObjectHashMap
instance with the default capacity and load factor. -
TDoubleObjectHashMap
public TDoubleObjectHashMap(int initialCapacity) Creates a newTDoubleObjectHashMap
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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TDoubleObjectHashMap
public TDoubleObjectHashMap(int initialCapacity, float loadFactor) Creates a newTDoubleObjectHashMap
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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TDoubleObjectHashMap
Creates a newTDoubleObjectHashMap
instance with the default capacity and load factor.- Parameters:
strategy
- used to compute hash codes and to compare keys.
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TDoubleObjectHashMap
Creates a newTDoubleObjectHashMap
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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TDoubleObjectHashMap
Creates a newTDoubleObjectHashMap
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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clone
- Overrides:
clone
in classTDoubleHash
- Returns:
- a deep clone of this collection
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iterator
- Returns:
- a TDoubleObjectIterator with access to this map's keys and values
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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 classTDoubleHash
- Parameters:
initialCapacity
- anint
value- Returns:
- the actual capacity chosen
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put
Inserts a key/value pair into the map.- Parameters:
key
- andouble
valuevalue
- anObject
value- Returns:
- the previous value associated with key,
or
null
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
- andouble
valuevalue
- anObject
value- Returns:
- the previous value associated with key,
or
null
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
- andouble
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
- andouble
value- Returns:
- an
Object
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. -
hashCode
public int hashCode() -
removeAt
protected void removeAt(int index) removes the mapping at index from the map.- Overrides:
removeAt
in classTDoubleHash
- Parameters:
index
- anint
value
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getValues
Returns the values of the map.- Returns:
- a
Collection
value - See Also:
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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:
ArrayStoreException
- the runtime type of the specified array is not a supertype of the runtime type of every element in this collection.NullPointerException
- if the specified array is null.- See Also:
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keys
public double[] keys()returns the keys of the map.- Returns:
- a
Set
value
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keys
public double[] keys(double[] a) 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 type is allocated for this purpose.- Returns:
- a
Set
value
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containsValue
checks for the presence of val in the values of the map.- Parameters:
val
- anObject
value- Returns:
- a
boolean
value
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containsKey
public boolean containsKey(double key) checks for the present of key in the keys of the map.- Parameters:
key
- andouble
value- Returns:
- a
boolean
value
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forEachKey
Executes procedure for each key in the map.- Parameters:
procedure
- aTDoubleProcedure
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
- aTObjectProcedure
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
- aTODoubleObjectProcedure
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
- aTObjectFunction
value
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writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Overrides:
writeExternal
in classTHash
- Throws:
IOException
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readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Overrides:
readExternal
in classTHash
- Throws:
IOException
ClassNotFoundException
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toString
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