public class OpenCharCharHashMap extends AbstractCharCharMap
Modifier and Type | Class and Description |
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class |
OpenCharCharHashMap.MapElement |
class |
OpenCharCharHashMap.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 char |
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 char[] |
table
The hash table keys.
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protected char[] |
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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OpenCharCharHashMap()
Constructs an empty map with default capacity and default load factors.
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OpenCharCharHashMap(int initialCapacity)
Constructs an empty map with the specified initial capacity and default load factors.
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OpenCharCharHashMap(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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char |
adjustOrPutValue(char key,
char newValue,
char 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(char key)
Returns true if the receiver contains the specified key.
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boolean |
containsValue(char 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(CharProcedure procedure)
Applies a procedure to each key of the receiver, if any.
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boolean |
forEachPair(CharCharProcedure procedure)
Applies a procedure to each (key,value) pair of the receiver, if any.
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char |
get(char 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(char key) |
protected int |
indexOfKey(char key) |
protected int |
indexOfValue(char value) |
Iterator<OpenCharCharHashMap.MapElement> |
iterator() |
void |
keys(CharArrayList list)
Fills all keys contained in the receiver into the specified list.
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void |
pairsMatching(CharCharProcedure condition,
CharArrayList keyList,
CharArrayList valueList)
Fills all pairs satisfying a given condition into the specified lists.
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boolean |
put(char key,
char 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(char 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(CharArrayList 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 char NO_KEY_VALUE
protected char[] table
protected char[] values
protected byte[] state
protected int freeEntries
public OpenCharCharHashMap()
public OpenCharCharHashMap(int initialCapacity)
initialCapacity
- the initial capacity of the map.IllegalArgumentException
- if the initial capacity is less than zero.public OpenCharCharHashMap(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(char key)
containsKey
in class AbstractCharCharMap
public boolean containsValue(char value)
containsValue
in class AbstractCharCharMap
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(CharProcedure procedure)
forEachKey
in class AbstractCharCharMap
procedure
- the procedure to be applied. Stops iteration if the procedure returns false, otherwise
continues.public boolean forEachPair(CharCharProcedure procedure)
forEachKey(CharProcedure)
.forEachPair
in class AbstractCharCharMap
procedure
- the procedure to be applied. Stops iteration if the procedure returns false, otherwise
continues.public char get(char key)
get
in class AbstractCharCharMap
key
- the key to be searched for.protected int indexOfInsertion(char key)
key
- the key to be added to the receiver.protected int indexOfKey(char key)
key
- the key to be searched in the receiver.protected int indexOfValue(char value)
value
- the value to be searched in the receiver.public void keys(CharArrayList list)
forEachKey(CharProcedure)
.
This method can be used to iterate over the keys of the receiver.
keys
in class AbstractCharCharMap
list
- the list to be filled, can have any size.public Iterator<OpenCharCharHashMap.MapElement> iterator()
public void pairsMatching(CharCharProcedure condition, CharArrayList keyList, CharArrayList valueList)
forEachKey(CharProcedure)
. Example:
CharCharProcedure condition = new CharCharProcedure() { // match even values only public boolean apply(char key, char value) { return value%2==0; } } keys = (8,7,6), values = (1,2,2) --> keyList = (6,8), valueList = (2,1)
pairsMatching
in class AbstractCharCharMap
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(char key, char value)
put
in class AbstractCharCharMap
key
- the key the value shall be associated with.value
- the value to be associated.public char adjustOrPutValue(char key, char newValue, char incrValue)
AbstractCharCharMap
adjustOrPutValue
in class AbstractCharCharMap
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(char key)
removeKey
in class AbstractCharCharMap
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(CharArrayList list)
forEachKey(CharProcedure)
.
This method can be used to iterate over the values of the receiver.
values
in class AbstractCharCharMap
list
- the list to be filled, can have any size.protected void getInternalFactors(int[] capacity, double[] minLoadFactor, double[] maxLoadFactor)
capacity
- minLoadFactor
- maxLoadFactor
- Copyright © 2008–2015 The Apache Software Foundation. All rights reserved.