Package gnu.trove.impl.hash
Class TIntHash
java.lang.Object
gnu.trove.impl.hash.THash
gnu.trove.impl.hash.TPrimitiveHash
gnu.trove.impl.hash.TIntHash
- All Implemented Interfaces:
Externalizable
,Serializable
- Direct Known Subclasses:
TIntHashSet
,TIntObjectHashMap
An open addressed hashing implementation for int primitives.
Created: Sun Nov 4 08:56:06 2001
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionint[]
the set of intsprotected boolean
protected int
value that represents null NOTE: should not be modified after the Hash is created, but is not final because of ExternalizationFields inherited from class gnu.trove.impl.hash.TPrimitiveHash
_states, FREE, FULL, REMOVED
Fields inherited from class gnu.trove.impl.hash.THash
_autoCompactionFactor, _autoCompactRemovesRemaining, _autoCompactTemporaryDisable, _free, _loadFactor, _maxSize, _size, DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR
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Constructor Summary
ConstructorsConstructorDescriptionTIntHash()
Creates a newTIntHash
instance with the default capacity and load factor.TIntHash
(int initialCapacity) Creates a newTIntHash
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TIntHash
(int initialCapacity, float loadFactor) Creates a newTIntHash
instance with a prime value at or near the specified capacity and load factor.TIntHash
(int initialCapacity, float loadFactor, int no_entry_value) Creates a newTIntHash
instance with a prime value at or near the specified capacity and load factor. -
Method Summary
Modifier and TypeMethodDescriptionboolean
contains
(int val) Searches the set for valboolean
forEach
(TIntProcedure procedure) Executes procedure for each element in the set.int
Returns the value that is used to represent null.protected int
index
(int val) Locates the index of val.protected int
insertKey
(int val) Locates the index at which val can be inserted.protected void
removeAt
(int index) Releases the element currently stored at index.protected int
setUp
(int initialCapacity) initializes the hashtable to a prime capacity which is at least initialCapacity + 1.Methods inherited from class gnu.trove.impl.hash.TPrimitiveHash
capacity
Methods inherited from class gnu.trove.impl.hash.THash
calculateGrownCapacity, clear, compact, computeMaxSize, computeNextAutoCompactionAmount, ensureCapacity, fastCeil, getAutoCompactionFactor, isEmpty, postInsertHook, readExternal, reenableAutoCompaction, rehash, saturatedCast, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize, writeExternal
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Field Details
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_set
public transient int[] _setthe set of ints -
no_entry_value
protected int no_entry_valuevalue that represents null NOTE: should not be modified after the Hash is created, but is not final because of Externalization -
consumeFreeSlot
protected boolean consumeFreeSlot
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Constructor Details
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TIntHash
public TIntHash()Creates a newTIntHash
instance with the default capacity and load factor. -
TIntHash
public TIntHash(int initialCapacity) Creates a newTIntHash
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.- Parameters:
initialCapacity
- anint
value
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TIntHash
public TIntHash(int initialCapacity, float loadFactor) Creates a newTIntHash
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.
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TIntHash
public TIntHash(int initialCapacity, float loadFactor, int no_entry_value) Creates a newTIntHash
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.no_entry_value
- value that represents null
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Method Details
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getNoEntryValue
public int getNoEntryValue()Returns the value that is used to represent null. The default value is generally zero, but can be changed during construction of the collection.- Returns:
- the value that represents null
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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 classTPrimitiveHash
- Parameters:
initialCapacity
- anint
value- Returns:
- the actual capacity chosen
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contains
public boolean contains(int val) Searches the set for val- Parameters:
val
- anint
value- Returns:
- a
boolean
value
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forEach
Executes procedure for each element in the set.- Parameters:
procedure
- aTObjectProcedure
value- Returns:
- false if the loop over the set terminated because the procedure returned false for some value.
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removeAt
protected void removeAt(int index) Releases the element currently stored at index.- Overrides:
removeAt
in classTPrimitiveHash
- Parameters:
index
- anint
value
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index
protected int index(int val) Locates the index of val.- Parameters:
val
- anint
value- Returns:
- the index of val or -1 if it isn't in the set.
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insertKey
protected int insertKey(int val) Locates the index at which val can be inserted. if there is already a value equal()ing val in the set, returns that value as a negative integer.- Parameters:
val
- anint
value- Returns:
- an
int
value
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