Package gnu.trove.impl.hash
Class TByteHash
- java.lang.Object
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- gnu.trove.impl.hash.THash
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- gnu.trove.impl.hash.TPrimitiveHash
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- gnu.trove.impl.hash.TByteHash
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- All Implemented Interfaces:
java.io.Externalizable
,java.io.Serializable
- Direct Known Subclasses:
TByteHashSet
,TByteObjectHashMap
public abstract class TByteHash extends TPrimitiveHash
An open addressed hashing implementation for byte primitives. Created: Sun Nov 4 08:56:06 2001- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description byte[]
_set
the set of bytesprotected boolean
consumeFreeSlot
protected byte
no_entry_value
value that represents null NOTE: should not be modified after the Hash is created, but is not final because of Externalization-
Fields inherited from class gnu.trove.impl.hash.TPrimitiveHash
_states, FREE, FULL, REMOVED
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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
Constructors Constructor Description TByteHash()
Creates a newTByteHash
instance with the default capacity and load factor.TByteHash(int initialCapacity)
Creates a newTByteHash
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TByteHash(int initialCapacity, float loadFactor)
Creates a newTByteHash
instance with a prime value at or near the specified capacity and load factor.TByteHash(int initialCapacity, float loadFactor, byte no_entry_value)
Creates a newTByteHash
instance with a prime value at or near the specified capacity and load factor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
contains(byte val)
Searches the set for valboolean
forEach(TByteProcedure procedure)
Executes procedure for each element in the set.byte
getNoEntryValue()
Returns the value that is used to represent null.protected int
index(byte val)
Locates the index of val.protected int
insertKey(byte 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
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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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Constructor Detail
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TByteHash
public TByteHash()
Creates a newTByteHash
instance with the default capacity and load factor.
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TByteHash
public TByteHash(int initialCapacity)
Creates a newTByteHash
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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TByteHash
public TByteHash(int initialCapacity, float loadFactor)
Creates a newTByteHash
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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TByteHash
public TByteHash(int initialCapacity, float loadFactor, byte no_entry_value)
Creates a newTByteHash
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 Detail
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getNoEntryValue
public byte 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
public boolean forEach(TByteProcedure procedure)
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(byte val)
Locates the index of val.- Parameters:
val
- 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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