TObjectByteHashMap (core 3.1.0 API)

java.lang.Object
- gnu.trove.impl.hash.THash
- - gnu.trove.impl.hash.TObjectHash<K>
  - - gnu.trove.map.hash.TObjectByteHashMap<K>

All Implemented Interfaces:

TObjectByteMap<K>, java.io.Externalizable, java.io.Serializable
```
public class TObjectByteHashMap<K>
extends TObjectHash<K>
implements TObjectByteMap<K>, java.io.Externalizable
```
An open addressed Map implementation for Object keys and byte values. Created: Sun Nov 4 08:52:45 2001

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

protected class TObjectByteHashMap.KeyView
a view onto the keys of the map.

Nested Classes
Modifier and Type	Class and Description
`protected class`	`TObjectByteHashMap.KeyView` a view onto the keys of the map.

Field Summary

Fields
Modifier and Type Field and Description

protected byte[] _values
the values of the map

protected byte no_entry_value
the value that represents null
- Fields inherited from class gnu.trove.impl.hash.TObjectHash
  _set, consumeFreeSlot, FREE, REMOVED
- Fields inherited from class gnu.trove.impl.hash.THash
  _autoCompactionFactor, _autoCompactRemovesRemaining, _autoCompactTemporaryDisable, _free, _loadFactor, _maxSize, _size, DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR

Fields
Modifier and Type	Field and Description
`protected byte[]`	`_values` the values of the map
`protected byte`	`no_entry_value` the value that represents null

Constructor Summary

Constructors
Constructor and Description
`TObjectByteHashMap()` Creates a new `TObjectByteHashMap` instance with the default capacity and load factor.
`TObjectByteHashMap(int initialCapacity)` Creates a new `TObjectByteHashMap` instance with a prime capacity equal to or greater than `initialCapacity` and with the default load factor.
`TObjectByteHashMap(int initialCapacity, float loadFactor)` Creates a new `TObjectByteHashMap` instance with a prime capacity equal to or greater than `initialCapacity` and with the specified load factor.
`TObjectByteHashMap(int initialCapacity, float loadFactor, byte noEntryValue)` Creates a new `TObjectByteHashMap` instance with a prime value at or near the specified capacity and load factor.
`TObjectByteHashMap(TObjectByteMap<? extends K> map)` Creates a new `TObjectByteHashMap` that contains the entries in the map passed to it.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`byte`	`adjustOrPutValue(K key, byte adjust_amount, byte put_amount)` Adds an amount to the primitive value mapped to the key if the key is present in the map.
`boolean`	`adjustValue(K key, byte amount)` Adds an amount to the primitive value mapped to key.
`void`	`clear()` Empties the collection.
`boolean`	`containsKey(java.lang.Object key)` Checks for the present of `key` in the keys of the map.
`boolean`	`containsValue(byte 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(TObjectByteProcedure<? super K> procedure)` Executes `procedure` for each key/value entry in the map.
`boolean`	`forEachKey(TObjectProcedure<? super K> procedure)` Executes `procedure` for each key in the map.
`boolean`	`forEachValue(TByteProcedure procedure)` Executes `procedure` for each value in the map.
`byte`	`get(java.lang.Object key)` Retrieves the value for `key`.
`byte`	`getNoEntryValue()` Returns the value that will be returned from `TObjectByteMap.get(java.lang.Object)` or `TObjectByteMap.put(K, byte)` if no entry exists for a given key.
`int`	`hashCode()` Returns the hash code value for this map.
`boolean`	`increment(K key)` Increments the primitive value mapped to key by 1
`TObjectByteIterator<K>`	`iterator()` Returns a `TObjectByteIterator` with access to this map's keys and values.
`java.lang.Object[]`	`keys()` Returns a copy of the keys of the map as an array.
`K[]`	`keys(K[] a)` Returns a copy of the keys of the map as an array.
`java.util.Set<K>`	`keySet()` Returns a `Set` view of the keys contained in this map.
`byte`	`put(K key, byte value)` Inserts a key/value pair into the map.
`void`	`putAll(java.util.Map<? extends K,? extends java.lang.Byte> map)` Copies all of the mappings from the specified map to this map (optional operation).
`void`	`putAll(TObjectByteMap<? extends K> map)` Put all the entries from the given map into this map.
`byte`	`putIfAbsent(K key, byte 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.
`byte`	`remove(java.lang.Object key)` Deletes a key/value pair from the map.
`protected void`	`removeAt(int index)` Removes the mapping at `index` from the map.
`boolean`	`retainEntries(TObjectByteProcedure<? super K> procedure)` Retains only those entries in the map for which the procedure returns a true value.
`int`	`setUp(int initialCapacity)` initializes the hashtable to a prime capacity which is at least `initialCapacity + 1`.
`java.lang.String`	`toString()`
`void`	`transformValues(TByteFunction function)` Transform the values in this map using `function`.
`TByteCollection`	`valueCollection()` Returns a `TByteCollection` view of the values contained in this map.
`byte[]`	`values()` Returns the values of the map as an array of `byte` values.
`byte[]`	`values(byte[] array)` Returns the values of the map using an existing array.
`void`	`writeExternal(java.io.ObjectOutput out)`

Methods inherited from class gnu.trove.impl.hash.TObjectHash
buildObjectContractViolation, capacity, contains, dumpExtraInfo, equals, forEach, hash, index, insertionIndex, insertKey, objectInfo, reportPotentialConcurrentMod, throwObjectContractViolation, throwObjectContractViolation

Methods inherited from class gnu.trove.impl.hash.THash
calculateGrownCapacity, compact, computeMaxSize, computeNextAutoCompactionAmount, ensureCapacity, fastCeil, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, saturatedCast, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface gnu.trove.map.TObjectByteMap
isEmpty, size

- Field Detail
  - _values
```
protected transient byte[] _values
```
    the values of the map
  - no_entry_value
```
protected byte no_entry_value
```
    the value that represents null
- Constructor Detail
  - TObjectByteHashMap
```
public TObjectByteHashMap()
```
    Creates a new TObjectByteHashMap instance with the default capacity and load factor.
  - TObjectByteHashMap
```
public TObjectByteHashMap(int initialCapacity)
```
    Creates a new TObjectByteHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
    
    Parameters:
    
    initialCapacity - an int value
  - TObjectByteHashMap
```
public TObjectByteHashMap(int initialCapacity,
                          float loadFactor)
```
    Creates a new TObjectByteHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
    
    Parameters:
    
    initialCapacity - an int value
    
    loadFactor - a float value
  - TObjectByteHashMap
```
public TObjectByteHashMap(int initialCapacity,
                          float loadFactor,
                          byte noEntryValue)
```
    Creates a new TObjectByteHashMap 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.
    
    noEntryValue - the value used to represent null.
  - TObjectByteHashMap
```
public TObjectByteHashMap(TObjectByteMap<? extends K> map)
```
    Creates a new TObjectByteHashMap that contains the entries in the map passed to it.
    
    Parameters:
    
    map - the TObjectByteMap to be copied.
- Method Detail
  - setUp
```
public int setUp(int initialCapacity)
```
    initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
    
    Overrides:
    
    setUp in class TObjectHash<K>
    
    Parameters:
    
    initialCapacity - an int value
    
    Returns:
    
    the actual capacity chosen
  - rehash
```
protected void rehash(int newCapacity)
```
    rehashes the map to the new capacity.
    
    Specified by:
    
    rehash in class THash
    
    Parameters:
    
    newCapacity - an int value
  - getNoEntryValue
```
public byte getNoEntryValue()
```
    Returns the value that will be returned from TObjectByteMap.get(java.lang.Object) or TObjectByteMap.put(K, byte) if no entry exists for a given key. The default value is generally zero, but can be configured during construction of the collection.
    
    Specified by:
    
    getNoEntryValue in interface TObjectByteMap<K>
    
    Returns:
    
    the value that represents a null value in this collection.
  - containsKey
```
public boolean containsKey(java.lang.Object key)
```
    Checks for the present of key in the keys of the map.
    
    Specified by:
    
    containsKey in interface TObjectByteMap<K>
  - containsValue
```
public boolean containsValue(byte val)
```
    Checks for the presence of val in the values of the map.
    
    Specified by:
    
    containsValue in interface TObjectByteMap<K>
  - get
```
public byte get(java.lang.Object key)
```
    Retrieves the value for key.
    
    Specified by:
    
    get in interface TObjectByteMap<K>
    
    Returns:
    
    the previous value associated with key, or the "no entry" value if none was found (see TObjectByteMap.getNoEntryValue()).
  - put
```
public byte put(K key,
                byte value)
```
    Inserts a key/value pair into the map.
    
    Specified by:
    
    put in interface TObjectByteMap<K>
    
    Returns:
    
    the previous value associated with key, or the "no entry" value if none was found (see TObjectByteMap.getNoEntryValue()).
  - putIfAbsent
```
public byte putIfAbsent(K key,
                        byte value)
```
    Inserts a key/value pair into the map if the specified key is not already associated with a value.
    
    Specified by:
    
    putIfAbsent in interface TObjectByteMap<K>
    
    Parameters:
    
    key - key with which the specified value is to be associated
    
    value - an byte value to be associated with the specified key
    
    Returns:
    
    the previous value associated with key, or the "no entry" value if none was found (see TObjectByteMap.getNoEntryValue()).
  - remove
```
public byte remove(java.lang.Object key)
```
    Deletes a key/value pair from the map.
    
    Specified by:
    
    remove in interface TObjectByteMap<K>
    
    Parameters:
    
    key - an #k# value
    
    Returns:
    
    the previous value associated with key, or the "no entry" value if none was found (see TObjectByteMap.getNoEntryValue()).
  - removeAt
```
protected void removeAt(int index)
```
    Removes the mapping at index from the map. This method is used internally and public mainly because of packaging reasons. Caveat Programmer.
    
    Overrides:
    
    removeAt in class TObjectHash<K>
    
    Parameters:
    
    index - an int value
  - putAll
```
public void putAll(java.util.Map<? extends K,? extends java.lang.Byte> map)
```
    Copies all of the mappings from the specified map to this map (optional operation). The effect of this call is equivalent to that of calling put(k, v) on this map once for each mapping from key k to value v in the specified map. The behavior of this operation is undefined if the specified map is modified while the operation is in progress.
    
    Specified by:
    
    putAll in interface TObjectByteMap<K>
    
    Parameters:
    
    map - mappings to be stored in this map
  - putAll
```
public void putAll(TObjectByteMap<? extends K> map)
```
    Put all the entries from the given map into this map.
    
    Specified by:
    
    putAll in interface TObjectByteMap<K>
    
    Parameters:
    
    map - The map from which entries will be obtained to put into this map.
  - clear
```
public void clear()
```
    Empties the collection.
    
    Specified by:
    
    clear in interface TObjectByteMap<K>
    
    Overrides:
    
    clear in class THash
  - keySet
```
public java.util.Set<K> keySet()
```
    Returns a Set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.
    
    Specified by:
    
    keySet in interface TObjectByteMap<K>
    
    Returns:
    
    a set view of the keys contained in this map
  - keys
```
public java.lang.Object[] keys()
```
    Returns a copy of the keys of the map as an array. Changes to the array of keys will not be reflected in the map nor vice-versa.
    
    Specified by:
    
    keys in interface TObjectByteMap<K>
    
    Returns:
    
    a copy of the keys of the map as an array.
  - keys
```
public K[] keys(K[] a)
```
    Returns a copy of the keys of the map as an array. Changes to the array of keys will not be reflected in the map nor vice-versa.
    
    Specified by:
    
    keys in interface TObjectByteMap<K>
    
    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:
    
    the keys of the map as an array.
  - valueCollection
```
public TByteCollection valueCollection()
```
    Returns a TByteCollection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the TByteIterator.remove, TByteCollection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.
    
    Specified by:
    
    valueCollection in interface TObjectByteMap<K>
    
    Returns:
    
    a collection view of the values contained in this map
  - values
```
public byte[] values()
```
    Returns the values of the map as an array of byte values. Changes to the array of values will not be reflected in the map nor vice-versa.
    
    Specified by:
    
    values in interface TObjectByteMap<K>
    
    Returns:
    
    the values of the map as an array of byte values.
  - values
```
public byte[] values(byte[] array)
```
    Returns the values of the map using an existing array. Changes to the array of values will not be reflected in the map nor vice-versa.
    
    Specified by:
    
    values in interface TObjectByteMap<K>
    
    Parameters:
    
    array - 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:
    
    the values of the map as an array of byte values.
  - iterator
```
public TObjectByteIterator<K> iterator()
```
    Description copied from interface: TObjectByteMap
    
    Returns a TObjectByteIterator with access to this map's keys and values.
    
    Specified by:
    
    iterator in interface TObjectByteMap<K>
    
    Returns:
    
    an iterator over the entries in this map
  - increment
```
public boolean increment(K key)
```
    Increments the primitive value mapped to key by 1
    
    Specified by:
    
    increment in interface TObjectByteMap<K>
    
    Parameters:
    
    key - the key of the value to increment
    
    Returns:
    
    true if a mapping was found and modified.
  - adjustValue
```
public boolean adjustValue(K key,
                           byte amount)
```
    Adds an amount to the primitive value mapped to key. If the key does not exist, the map is not modified (key-value is not inserted).
    
    Specified by:
    
    adjustValue in interface TObjectByteMap<K>
    
    Parameters:
    
    key - the key of the value to increment
    
    amount - the amount to add to the value; may be positive, zero, or negative
    
    Returns:
    
    true if a mapping was found and modified
    
    See Also:
    
    TObjectByteMap.adjustOrPutValue(Object, byte, byte)
  - adjustOrPutValue
```
public byte adjustOrPutValue(K key,
                             byte adjust_amount,
                             byte put_amount)
```
    Adds an amount to the primitive value mapped to the key if the key is present in the map. Otherwise, the put_amount is put in the map.
    
    Specified by:
    
    adjustOrPutValue in interface TObjectByteMap<K>
    
    Parameters:
    
    key - the key of the value to increment
    
    adjust_amount - the amount to add to the value; may be positive, zero, or negative
    
    put_amount - the value put into the map if the key is not present
    
    Returns:
    
    the value present in the map after the adjustment or put operation
  - forEachKey
```
public boolean forEachKey(TObjectProcedure<? super K> procedure)
```
    Executes procedure for each key in the map.
    
    Specified by:
    
    forEachKey in interface TObjectByteMap<K>
    
    Parameters:
    
    procedure - a TObjectProcedure value
    
    Returns:
    
    false if the loop over the keys terminated because the procedure returned false for some key.
  - forEachValue
```
public boolean forEachValue(TByteProcedure procedure)
```
    Executes procedure for each value in the map.
    
    Specified by:
    
    forEachValue in interface TObjectByteMap<K>
    
    Parameters:
    
    procedure - a TByteProcedure value
    
    Returns:
    
    false if the loop over the values terminated because the procedure returned false for some value.
  - forEachEntry
```
public boolean forEachEntry(TObjectByteProcedure<? super K> procedure)
```
    Executes procedure for each key/value entry in the map.
    
    Specified by:
    
    forEachEntry in interface TObjectByteMap<K>
    
    Parameters:
    
    procedure - a TOObjectByteProcedure value
    
    Returns:
    
    false if the loop over the entries terminated because the procedure returned false for some entry.
  - retainEntries
```
public boolean retainEntries(TObjectByteProcedure<? super K> procedure)
```
    Retains only those entries in the map for which the procedure returns a true value.
    
    Specified by:
    
    retainEntries in interface TObjectByteMap<K>
    
    Parameters:
    
    procedure - determines which entries to keep
    
    Returns:
    
    true if the map was modified.
  - transformValues
```
public void transformValues(TByteFunction function)
```
    Transform the values in this map using function.
    
    Specified by:
    
    transformValues in interface TObjectByteMap<K>
    
    Parameters:
    
    function - a TByteFunction value
  - equals
```
public boolean equals(java.lang.Object other)
```
    Compares this map with another map for equality of their stored entries.
    
    Specified by:
    
    equals in interface TObjectByteMap<K>
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    other - an Object value
    
    Returns:
    
    a boolean value
  - hashCode
```
public int hashCode()
```
    Returns the hash code value for this map. The hash code of a map is defined to be the sum of the hash codes of each entry in the map's entrySet() view. This ensures that m1.equals(m2) implies that m1.hashCode()==m2.hashCode() for any two maps m1 and m2, as required by the general contract of Object.hashCode().
    
    Specified by:
    
    hashCode in interface TObjectByteMap<K>
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    the hash code value for this map
    
    See Also:
    
    Object.equals(Object), TObjectByteMap.equals(Object)
  - writeExternal
```
public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
```
    Specified by:
    
    writeExternal in interface java.io.Externalizable
    
    Overrides:
    
    writeExternal in class TObjectHash<K>
    
    Throws:
    
    java.io.IOException
  - readExternal
```
public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException
```
    Specified by:
    
    readExternal in interface java.io.Externalizable
    
    Overrides:
    
    readExternal in class TObjectHash<K>
    
    Throws:
    
    java.io.IOException
    
    java.lang.ClassNotFoundException
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class TObjectByteHashMap<K>

Nested Class Summary

Field Summary

Fields inherited from class gnu.trove.impl.hash.TObjectHash

Fields inherited from class gnu.trove.impl.hash.THash

Constructor Summary

Method Summary

Methods inherited from class gnu.trove.impl.hash.TObjectHash

Methods inherited from class gnu.trove.impl.hash.THash

Methods inherited from class java.lang.Object

Methods inherited from interface gnu.trove.map.TObjectByteMap

Field Detail

_values

no_entry_value

Constructor Detail

TObjectByteHashMap

TObjectByteHashMap

TObjectByteHashMap

TObjectByteHashMap

TObjectByteHashMap

Method Detail

setUp

rehash

getNoEntryValue

containsKey

containsValue

get

put

putIfAbsent

remove

removeAt

putAll

putAll

clear

keySet

keys

keys

valueCollection

values

values

iterator

increment

adjustValue

adjustOrPutValue

forEachKey

forEachValue

forEachEntry

retainEntries

transformValues

equals

hashCode

writeExternal

readExternal

toString