Package gnu.trove.impl.hash
Class TByteFloatHash
java.lang.Object
gnu.trove.impl.hash.THash
gnu.trove.impl.hash.TPrimitiveHash
gnu.trove.impl.hash.TByteFloatHash
- All Implemented Interfaces:
Externalizable
,Serializable
- Direct Known Subclasses:
TByteFloatHashMap
An open addressed hashing implementation for byte/float primitive entries.
Created: Sun Nov 4 08:56:06 2001
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionbyte[]
the set of bytesprotected boolean
protected byte
key that represents null NOTE: should not be modified after the Hash is created, but is not final because of Externalizationprotected float
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
ConstructorsConstructorDescriptionCreates a newT#E#Hash
instance with the default capacity and load factor.TByteFloatHash
(int initialCapacity) Creates a newT#E#Hash
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TByteFloatHash
(int initialCapacity, float loadFactor) Creates a newTByteFloatHash
instance with a prime value at or near the specified capacity and load factor.TByteFloatHash
(int initialCapacity, float loadFactor, byte no_entry_key, float no_entry_value) Creates a newTByteFloatHash
instance with a prime value at or near the specified capacity and load factor. -
Method Summary
Modifier and TypeMethodDescriptionboolean
contains
(byte val) Searches the set for valboolean
forEach
(TByteProcedure procedure) Executes procedure for each key in the map.byte
Returns the value that is used to represent null as a key.float
Returns the value that is used to represent null.protected int
index
(byte key) Locates the index of val.protected int
insertKey
(byte val) Locates the index at which val can be inserted.void
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.void
protected int
XinsertKey
(byte key) 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, reenableAutoCompaction, rehash, saturatedCast, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
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Field Details
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_set
public transient byte[] _setthe set of bytes -
no_entry_key
protected byte no_entry_keykey that represents null NOTE: should not be modified after the Hash is created, but is not final because of Externalization -
no_entry_value
protected float 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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TByteFloatHash
public TByteFloatHash()Creates a newT#E#Hash
instance with the default capacity and load factor. -
TByteFloatHash
public TByteFloatHash(int initialCapacity) Creates a newT#E#Hash
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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TByteFloatHash
public TByteFloatHash(int initialCapacity, float loadFactor) Creates a newTByteFloatHash
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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TByteFloatHash
public TByteFloatHash(int initialCapacity, float loadFactor, byte no_entry_key, float no_entry_value) Creates a newTByteFloatHash
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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getNoEntryKey
public byte getNoEntryKey()Returns the value that is used to represent null as a key. 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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getNoEntryValue
public float 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(byte val) Searches the set for val- Parameters:
val
- anbyte
value- Returns:
- a
boolean
value
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forEach
Executes procedure for each key in the map.- Parameters:
procedure
- aTByteProcedure
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(byte key) Locates the index of val.- Parameters:
key
- anbyte
value- Returns:
- the index of val or -1 if it isn't in the set.
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insertKey
protected int insertKey(byte 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
- anbyte
value- Returns:
- an
int
value
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XinsertKey
protected int XinsertKey(byte key) -
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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