Package gnu.trove
Class TByteFloatHashMap
- java.lang.Object
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- gnu.trove.THash
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- gnu.trove.TPrimitiveHash
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- gnu.trove.TByteHash
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- gnu.trove.TByteFloatHashMap
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- All Implemented Interfaces:
TByteHashingStrategy
,java.io.Externalizable
,java.io.Serializable
,java.lang.Cloneable
public class TByteFloatHashMap extends TByteHash implements java.io.Externalizable
An open addressed Map implementation for byte keys and float values. Created: Sun Nov 4 08:52:45 2001- Author:
- Eric D. Friedman
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected float[]
_values
the values of the map-
Fields inherited from class gnu.trove.TByteHash
_hashingStrategy, _set
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Fields inherited from class gnu.trove.TPrimitiveHash
_states, FREE, FULL, REMOVED
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Fields inherited from class gnu.trove.THash
_autoCompactionFactor, _autoCompactRemovesRemaining, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR
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Constructor Summary
Constructors Constructor Description TByteFloatHashMap()
Creates a newTByteFloatHashMap
instance with the default capacity and load factor.TByteFloatHashMap(int initialCapacity)
Creates a newTByteFloatHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.TByteFloatHashMap(int initialCapacity, float loadFactor)
Creates a newTByteFloatHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.TByteFloatHashMap(int initialCapacity, float loadFactor, TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
instance with a prime value at or near the specified capacity and load factor.TByteFloatHashMap(int initialCapacity, TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TByteFloatHashMap(TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
instance with the default capacity and load factor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description float
adjustOrPutValue(byte key, float adjust_amount, float put_amount)
Adjusts the primitive value mapped to the key if the key is present in the map.boolean
adjustValue(byte key, float amount)
Adjusts the primitive value mapped to key.void
clear()
Empties the map.java.lang.Object
clone()
boolean
containsKey(byte key)
checks for the present of key in the keys of the map.boolean
containsValue(float val)
checks for the presence of val in the values of the map.boolean
equals(java.lang.Object other)
Compares this map with another map for equality of their stored entries.boolean
forEachEntry(TByteFloatProcedure procedure)
Executes procedure for each key/value entry in the map.boolean
forEachKey(TByteProcedure procedure)
Executes procedure for each key in the map.boolean
forEachValue(TFloatProcedure procedure)
Executes procedure for each value in the map.float
get(byte key)
retrieves the value for keyfloat[]
getValues()
Returns the values of the map.int
hashCode()
boolean
increment(byte key)
Increments the primitive value mapped to key by 1TByteFloatIterator
iterator()
byte[]
keys()
returns the keys of the map.byte[]
keys(byte[] a)
returns the keys of the map.float
put(byte key, float value)
Inserts a key/value pair into the map.void
putAll(TByteFloatHashMap map)
Put all the entries from the given map into this map.float
putIfAbsent(byte key, float value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.void
readExternal(java.io.ObjectInput in)
protected void
rehash(int newCapacity)
rehashes the map to the new capacity.float
remove(byte key)
Deletes a key/value pair from the map.protected void
removeAt(int index)
removes the mapping at index from the map.boolean
retainEntries(TByteFloatProcedure procedure)
Retains only those entries in the map for which the procedure returns a true value.protected int
setUp(int initialCapacity)
initializes the hashtable to a prime capacity which is at least initialCapacity + 1.java.lang.String
toString()
void
transformValues(TFloatFunction function)
Transform the values in this map using function.void
writeExternal(java.io.ObjectOutput out)
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Methods inherited from class gnu.trove.TByteHash
computeHashCode, contains, forEach, index, insertionIndex
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Methods inherited from class gnu.trove.TPrimitiveHash
capacity
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Methods inherited from class gnu.trove.THash
calculateGrownCapacity, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
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Constructor Detail
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TByteFloatHashMap
public TByteFloatHashMap()
Creates a newTByteFloatHashMap
instance with the default capacity and load factor.
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TByteFloatHashMap
public TByteFloatHashMap(int initialCapacity)
Creates a newTByteFloatHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.- Parameters:
initialCapacity
- anint
value
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TByteFloatHashMap
public TByteFloatHashMap(int initialCapacity, float loadFactor)
Creates a newTByteFloatHashMap
instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.- Parameters:
initialCapacity
- anint
valueloadFactor
- afloat
value
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TByteFloatHashMap
public TByteFloatHashMap(TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
instance with the default capacity and load factor.- Parameters:
strategy
- used to compute hash codes and to compare keys.
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TByteFloatHashMap
public TByteFloatHashMap(int initialCapacity, TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
instance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.- Parameters:
initialCapacity
- anint
valuestrategy
- used to compute hash codes and to compare keys.
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TByteFloatHashMap
public TByteFloatHashMap(int initialCapacity, float loadFactor, TByteHashingStrategy strategy)
Creates a newTByteFloatHashMap
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.
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Method Detail
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clone
public java.lang.Object clone()
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iterator
public TByteFloatIterator iterator()
- Returns:
- a TByteFloatIterator with access to this map's keys and values
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setUp
protected int setUp(int initialCapacity)
initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
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put
public float put(byte key, float value)
Inserts a key/value pair into the map.- Parameters:
key
- anbyte
valuevalue
- anfloat
value- Returns:
- the previous value associated with key, or (byte)0 if none was found.
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putIfAbsent
public float putIfAbsent(byte key, float value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.- Parameters:
key
- anbyte
valuevalue
- anfloat
value- Returns:
- the previous value associated with key, or (byte)0 if none was found.
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putAll
public void putAll(TByteFloatHashMap map)
Put all the entries from the given map into this map.- Parameters:
map
- The map from which entries will be obtained to put into this map.
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rehash
protected void rehash(int newCapacity)
rehashes the map to the new capacity.
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get
public float get(byte key)
retrieves the value for key- Parameters:
key
- anbyte
value- Returns:
- the value of key or (byte)0 if no such mapping exists.
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remove
public float remove(byte key)
Deletes a key/value pair from the map.- Parameters:
key
- anbyte
value- Returns:
- an
float
value, or (byte)0 if no mapping for key exists
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equals
public boolean equals(java.lang.Object other)
Compares this map with another map for equality of their stored entries.- Overrides:
equals
in classjava.lang.Object
- Parameters:
other
- anObject
value- Returns:
- a
boolean
value
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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removeAt
protected void removeAt(int index)
removes the mapping at index from the map.
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getValues
public float[] getValues()
Returns the values of the map.- Returns:
- a
Collection
value
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keys
public byte[] keys()
returns the keys of the map.- Returns:
- a
Set
value
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keys
public byte[] keys(byte[] a)
returns the keys of the map.- Parameters:
a
- the array into which the elements of the list are to be stored, if it is big enough; otherwise, a new array of the same type is allocated for this purpose.- Returns:
- a
Set
value
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containsValue
public boolean containsValue(float val)
checks for the presence of val in the values of the map.- Parameters:
val
- anfloat
value- Returns:
- a
boolean
value
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containsKey
public boolean containsKey(byte key)
checks for the present of key in the keys of the map.- Parameters:
key
- anbyte
value- Returns:
- a
boolean
value
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forEachKey
public boolean forEachKey(TByteProcedure procedure)
Executes procedure for each key in the map.- Parameters:
procedure
- aTByteProcedure
value- Returns:
- false if the loop over the keys terminated because the procedure returned false for some key.
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forEachValue
public boolean forEachValue(TFloatProcedure procedure)
Executes procedure for each value in the map.- Parameters:
procedure
- aTFloatProcedure
value- Returns:
- false if the loop over the values terminated because the procedure returned false for some value.
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forEachEntry
public boolean forEachEntry(TByteFloatProcedure procedure)
Executes procedure for each key/value entry in the map.- Parameters:
procedure
- aTOByteFloatProcedure
value- Returns:
- false if the loop over the entries terminated because the procedure returned false for some entry.
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retainEntries
public boolean retainEntries(TByteFloatProcedure procedure)
Retains only those entries in the map for which the procedure returns a true value.- Parameters:
procedure
- determines which entries to keep- Returns:
- true if the map was modified.
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transformValues
public void transformValues(TFloatFunction function)
Transform the values in this map using function.- Parameters:
function
- aTFloatFunction
value
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increment
public boolean increment(byte key)
Increments the primitive value mapped to key by 1- Parameters:
key
- the key of the value to increment- Returns:
- true if a mapping was found and modified.
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adjustValue
public boolean adjustValue(byte key, float amount)
Adjusts the primitive value mapped to key.- Parameters:
key
- the key of the value to incrementamount
- the amount to adjust the value by.- Returns:
- true if a mapping was found and modified.
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adjustOrPutValue
public float adjustOrPutValue(byte key, float adjust_amount, float put_amount)
Adjusts the primitive value mapped to the key if the key is present in the map. Otherwise, the initial_value is put in the map.- Parameters:
key
- the key of the value to incrementadjust_amount
- the amount to adjust the value byput_amount
- the value put into the map if the key is not initial present- Returns:
- the value present in the map after the adjustment or put operation
- Since:
- 2.0b1
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writeExternal
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
- Specified by:
writeExternal
in interfacejava.io.Externalizable
- Overrides:
writeExternal
in classTHash
- Throws:
java.io.IOException
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readExternal
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException
- Specified by:
readExternal
in interfacejava.io.Externalizable
- Overrides:
readExternal
in classTHash
- Throws:
java.io.IOException
java.lang.ClassNotFoundException
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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