TByteHash (GNU Trove for Java API v2.1.0)

java.lang.Object
- gnu.trove.THash
- - gnu.trove.TPrimitiveHash
  - - gnu.trove.TByteHash

All Implemented Interfaces:

TByteHashingStrategy, java.io.Serializable

Direct Known Subclasses:

TByteByteHashMap, TByteDoubleHashMap, TByteFloatHashMap, TByteHashSet, TByteIntHashMap, TByteLongHashMap, TByteObjectHashMap, TByteShortHashMap
```
public abstract class TByteHash
extends TPrimitiveHash
implements TByteHashingStrategy
```
An open addressed hashing implementation for byte primitives. Created: Sun Nov 4 08:56:06 2001

Version:

$Id: PHash.template,v 1.2 2007/06/29 22:39:46 robeden Exp $

Author:

Eric D. Friedman

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected TByteHashingStrategy _hashingStrategy
strategy used to hash values in this collection

protected byte[] _set
the set of bytes
- Fields inherited from class gnu.trove.THash
  _autoCompactionFactor, _autoCompactRemovesRemaining, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR
- Fields inherited from class gnu.trove.TPrimitiveHash
  _states, FREE, FULL, REMOVED

Fields
Modifier and Type	Field	Description
`protected TByteHashingStrategy`	`_hashingStrategy`	strategy used to hash values in this collection
`protected byte[]`	`_set`	the set of bytes

Constructor Summary

Constructors
Constructor	Description
`TByteHash()`	Creates a new `TByteHash` instance with the default capacity and load factor.
`TByteHash(int initialCapacity)`	Creates a new `TByteHash` instance whose capacity is the next highest prime above `initialCapacity + 1` unless that value is already prime.
`TByteHash(int initialCapacity, float loadFactor)`	Creates a new `TByteHash` instance with a prime value at or near the specified capacity and load factor.
`TByteHash(int initialCapacity, float loadFactor, TByteHashingStrategy strategy)`	Creates a new `TByteHash` instance with a prime value at or near the specified capacity and load factor.
`TByteHash(int initialCapacity, TByteHashingStrategy strategy)`	Creates a new `TByteHash` instance whose capacity is the next highest prime above `initialCapacity + 1` unless that value is already prime.
`TByteHash(TByteHashingStrategy strategy)`	Creates a new `TByteHash` instance with the default capacity and load factor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`clone()`
`int`	`computeHashCode(byte val)`	Default implementation of TByteHashingStrategy: delegates hashing to HashFunctions.hash(byte).
`boolean`	`contains(byte val)`	Searches the set for `val`
`boolean`	`forEach(TByteProcedure procedure)`	Executes `procedure` for each element in the set.
`protected int`	`index(byte val)`	Locates the index of `val`.
`protected int`	`insertionIndex(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 java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from class gnu.trove.THash
calculateGrownCapacity, clear, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, readExternal, reenableAutoCompaction, rehash, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize, writeExternal

Methods inherited from class gnu.trove.TPrimitiveHash
capacity

- Field Detail
  - _set
```
protected transient byte[] _set
```
    the set of bytes
  - _hashingStrategy
```
protected TByteHashingStrategy _hashingStrategy
```
    strategy used to hash values in this collection
- Constructor Detail
  - TByteHash
```
public TByteHash()
```
    Creates a new TByteHash instance with the default capacity and load factor.
  - TByteHash
```
public TByteHash(int initialCapacity)
```
    Creates a new TByteHash instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.
    
    Parameters:
    
    initialCapacity - an int value
  - TByteHash
```
public TByteHash(int initialCapacity,
                 float loadFactor)
```
    Creates a new TByteHash 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.
  - TByteHash
```
public TByteHash(TByteHashingStrategy strategy)
```
    Creates a new TByteHash instance with the default capacity and load factor.
    
    Parameters:
    
    strategy - used to compute hash codes and to compare keys.
  - TByteHash
```
public TByteHash(int initialCapacity,
                 TByteHashingStrategy strategy)
```
    Creates a new TByteHash instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.
    
    Parameters:
    
    initialCapacity - an int value
    
    strategy - used to compute hash codes and to compare keys.
  - TByteHash
```
public TByteHash(int initialCapacity,
                 float loadFactor,
                 TByteHashingStrategy strategy)
```
    Creates a new TByteHash 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.
- Method Detail
  - clone
```
public java.lang.Object clone()
```
    Overrides:
    
    clone in class TPrimitiveHash
    
    Returns:
    
    a deep clone of this collection
  - setUp
```
protected int setUp(int initialCapacity)
```
    initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
    
    Overrides:
    
    setUp in class TPrimitiveHash
    
    Parameters:
    
    initialCapacity - an int value
    
    Returns:
    
    the actual capacity chosen
  - contains
```
public boolean contains(byte val)
```
    Searches the set for val
    
    Parameters:
    
    val - an byte value
    
    Returns:
    
    a boolean value
  - forEach
```
public boolean forEach(TByteProcedure procedure)
```
    Executes procedure for each element in the set.
    
    Parameters:
    
    procedure - a TObjectProcedure value
    
    Returns:
    
    false if the loop over the set terminated because the procedure returned false for some value.
  - removeAt
```
protected void removeAt(int index)
```
    Releases the element currently stored at index.
    
    Overrides:
    
    removeAt in class TPrimitiveHash
    
    Parameters:
    
    index - an int value
  - index
```
protected int index(byte val)
```
    Locates the index of val.
    
    Parameters:
    
    val - an byte value
    
    Returns:
    
    the index of val or -1 if it isn't in the set.
  - insertionIndex
```
protected int insertionIndex(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 - an byte value
    
    Returns:
    
    an int value
  - computeHashCode
```
public final int computeHashCode(byte val)
```
    Default implementation of TByteHashingStrategy: delegates hashing to HashFunctions.hash(byte).
    
    Specified by:
    
    computeHashCode in interface TByteHashingStrategy
    
    Parameters:
    
    val - the value to hash
    
    Returns:
    
    the hashcode.

Class TByteHash

Field Summary

Fields inherited from class gnu.trove.THash

Fields inherited from class gnu.trove.TPrimitiveHash

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from class gnu.trove.THash

Methods inherited from class gnu.trove.TPrimitiveHash

Field Detail

_set

_hashingStrategy

Constructor Detail

TByteHash

TByteHash

TByteHash

TByteHash

TByteHash

TByteHash

Method Detail

clone

setUp

contains

forEach

removeAt

index

insertionIndex

computeHashCode