public class OpenByteByteHashMap extends AbstractByteByteMap
Modifier and Type | Class and Description |
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class |
OpenByteByteHashMap.MapElement |
class |
OpenByteByteHashMap.MapIterator |
Modifier and Type | Field and Description |
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protected static byte |
FREE |
protected int |
freeEntries
The number of table entries in state==FREE.
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protected static byte |
FULL |
protected static byte |
NO_KEY_VALUE |
protected static byte |
REMOVED |
protected byte[] |
state
The state of each hash table entry (FREE, FULL, REMOVED).
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protected byte[] |
table
The hash table keys.
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protected byte[] |
values
The hash table values.
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DEFAULT_CAPACITY, DEFAULT_MAX_LOAD_FACTOR, DEFAULT_MIN_LOAD_FACTOR, distinct, highWaterMark, lowWaterMark, maxLoadFactor, minLoadFactor
Constructor and Description |
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OpenByteByteHashMap()
Constructs an empty map with default capacity and default load factors.
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OpenByteByteHashMap(int initialCapacity)
Constructs an empty map with the specified initial capacity and default load factors.
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OpenByteByteHashMap(int initialCapacity,
double minLoadFactor,
double maxLoadFactor)
Constructs an empty map with the specified initial capacity and the specified minimum and maximum load factor.
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Modifier and Type | Method and Description |
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byte |
adjustOrPutValue(byte key,
byte newValue,
byte incrValue)
Check the map for a key.
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void |
clear()
Removes all (key,value) associations from the receiver.
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Object |
clone()
Returns a deep copy of the receiver.
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boolean |
containsKey(byte key)
Returns true if the receiver contains the specified key.
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boolean |
containsValue(byte value)
Returns true if the receiver contains the specified value.
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void |
ensureCapacity(int minCapacity)
Ensures that the receiver can hold at least the specified number of associations without needing to allocate new
internal memory.
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boolean |
forEachKey(ByteProcedure procedure)
Applies a procedure to each key of the receiver, if any.
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boolean |
forEachPair(ByteByteProcedure procedure)
Applies a procedure to each (key,value) pair of the receiver, if any.
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byte |
get(byte key)
Returns the value associated with the specified key.
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protected void |
getInternalFactors(int[] capacity,
double[] minLoadFactor,
double[] maxLoadFactor)
Access for unit tests.
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protected int |
indexOfInsertion(byte key) |
protected int |
indexOfKey(byte key) |
protected int |
indexOfValue(byte value) |
Iterator<OpenByteByteHashMap.MapElement> |
iterator() |
void |
keys(ByteArrayList list)
Fills all keys contained in the receiver into the specified list.
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void |
pairsMatching(ByteByteProcedure condition,
ByteArrayList keyList,
ByteArrayList valueList)
Fills all pairs satisfying a given condition into the specified lists.
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boolean |
put(byte key,
byte value)
Associates the given key with the given value.
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protected void |
rehash(int newCapacity)
Rehashes the contents of the receiver into a new table with a smaller or larger capacity.
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boolean |
removeKey(byte key)
Removes the given key with its associated element from the receiver, if present.
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protected void |
setUp(int initialCapacity,
double minLoadFactor,
double maxLoadFactor)
Initializes the receiver.
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void |
trimToSize()
Trims the capacity of the receiver to be the receiver's current size.
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void |
values(ByteArrayList list)
Fills all values contained in the receiver into the specified list.
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copy, equals, hashCode, keys, keysSortedByValue, pairsSortedByKey, pairsSortedByValue, toString, toStringByValue, values
chooseGrowCapacity, chooseHighWaterMark, chooseLowWaterMark, chooseMeanCapacity, chooseShrinkCapacity, equalsMindTheNull, isEmpty, nextPrime, size
protected static final byte FREE
protected static final byte FULL
protected static final byte REMOVED
protected static final byte NO_KEY_VALUE
protected byte[] table
protected byte[] values
protected byte[] state
protected int freeEntries
public OpenByteByteHashMap()
public OpenByteByteHashMap(int initialCapacity)
initialCapacity
- the initial capacity of the map.IllegalArgumentException
- if the initial capacity is less than zero.public OpenByteByteHashMap(int initialCapacity, double minLoadFactor, double maxLoadFactor)
initialCapacity
- the initial capacity.minLoadFactor
- the minimum load factor.maxLoadFactor
- the maximum load factor.IllegalArgumentException
- if initialCapacity < 0 || (minLoadFactor < 0.0 || minLoadFactor >= 1.0) ||
(maxLoadFactor <= 0.0 || maxLoadFactor >= 1.0) || (minLoadFactor >=
maxLoadFactor).public void clear()
clear
in class AbstractSet
public Object clone()
clone
in class PersistentObject
public boolean containsKey(byte key)
containsKey
in class AbstractByteByteMap
public boolean containsValue(byte value)
containsValue
in class AbstractByteByteMap
public void ensureCapacity(int minCapacity)
This method never need be called; it is for performance tuning only. Calling this method before put()ing a large number of associations boosts performance, because the receiver will grow only once instead of potentially many times and hash collisions get less probable.
ensureCapacity
in class AbstractSet
minCapacity
- the desired minimum capacity.public boolean forEachKey(ByteProcedure procedure)
forEachKey
in class AbstractByteByteMap
procedure
- the procedure to be applied. Stops iteration if the procedure returns false, otherwise
continues.public boolean forEachPair(ByteByteProcedure procedure)
forEachKey(ByteProcedure)
.forEachPair
in class AbstractByteByteMap
procedure
- the procedure to be applied. Stops iteration if the procedure returns false, otherwise
continues.public byte get(byte key)
get
in class AbstractByteByteMap
key
- the key to be searched for.protected int indexOfInsertion(byte key)
key
- the key to be added to the receiver.protected int indexOfKey(byte key)
key
- the key to be searched in the receiver.protected int indexOfValue(byte value)
value
- the value to be searched in the receiver.public void keys(ByteArrayList list)
forEachKey(ByteProcedure)
.
This method can be used to iterate over the keys of the receiver.
keys
in class AbstractByteByteMap
list
- the list to be filled, can have any size.public Iterator<OpenByteByteHashMap.MapElement> iterator()
public void pairsMatching(ByteByteProcedure condition, ByteArrayList keyList, ByteArrayList valueList)
forEachKey(ByteProcedure)
. Example:
ByteByteProcedure condition = new ByteByteProcedure() { // match even values only public boolean apply(byte key, byte value) { return value%2==0; } } keys = (8,7,6), values = (1,2,2) --> keyList = (6,8), valueList = (2,1)
pairsMatching
in class AbstractByteByteMap
condition
- the condition to be matched. Takes the current key as first and the current value as second
argument.keyList
- the list to be filled with keys, can have any size.valueList
- the list to be filled with values, can have any size.public boolean put(byte key, byte value)
put
in class AbstractByteByteMap
key
- the key the value shall be associated with.value
- the value to be associated.public byte adjustOrPutValue(byte key, byte newValue, byte incrValue)
AbstractByteByteMap
adjustOrPutValue
in class AbstractByteByteMap
key
- the key.newValue
- the value to store if the key is not currently in the map.incrValue
- the value to be added to the current value in the map.protected void rehash(int newCapacity)
public boolean removeKey(byte key)
removeKey
in class AbstractByteByteMap
key
- the key to be removed from the receiver.protected final void setUp(int initialCapacity, double minLoadFactor, double maxLoadFactor)
setUp
in class AbstractSet
initialCapacity
- the initial capacity of the receiver.minLoadFactor
- the minLoadFactor of the receiver.maxLoadFactor
- the maxLoadFactor of the receiver.IllegalArgumentException
- if initialCapacity < 0 || (minLoadFactor < 0.0 || minLoadFactor >= 1.0) ||
(maxLoadFactor <= 0.0 || maxLoadFactor >= 1.0) || (minLoadFactor >=
maxLoadFactor).public void trimToSize()
trimToSize
in class AbstractSet
public void values(ByteArrayList list)
forEachKey(ByteProcedure)
.
This method can be used to iterate over the values of the receiver.
values
in class AbstractByteByteMap
list
- the list to be filled, can have any size.protected void getInternalFactors(int[] capacity, double[] minLoadFactor, double[] maxLoadFactor)
capacity
- minLoadFactor
- maxLoadFactor
- Copyright © 2008–2017 The Apache Software Foundation. All rights reserved.