GNU Trove

gnu.trove.map.hash
Class TCustomHashMap<K,V>

java.lang.Object
  extended by gnu.trove.impl.hash.THash
      extended by gnu.trove.impl.hash.TObjectHash<T>
          extended by gnu.trove.impl.hash.TCustomObjectHash<K>
              extended by gnu.trove.map.hash.TCustomHashMap<K,V>
All Implemented Interfaces:
java.io.Externalizable, java.io.Serializable, java.util.Map<K,V>

public class TCustomHashMap<K,V>
extends gnu.trove.impl.hash.TCustomObjectHash<K>
implements java.util.Map<K,V>, java.io.Externalizable

An implementation of the Map interface which uses an open addressed hash table to store its contents.

See Also:
Serialized Form

Nested Class Summary
protected  class TCustomHashMap.EntryView
          a view onto the entries of the map.
protected  class TCustomHashMap.KeyView
          a view onto the keys of the map.
protected  class TCustomHashMap.ValueView
          a view onto the values of the map.
 
Field Summary
protected  V[] _values
          the values of the map
 
Fields inherited from class gnu.trove.impl.hash.TCustomObjectHash
strategy
 
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
 
Constructor Summary
TCustomHashMap()
          FOR EXTERNALIZATION ONLY!!!
TCustomHashMap(HashingStrategy<? super K> strategy)
          Creates a new TCustomHashMap instance with the default capacity and load factor.
TCustomHashMap(HashingStrategy<? super K> strategy, int initialCapacity)
          Creates a new TCustomHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
TCustomHashMap(HashingStrategy<? super K> strategy, int initialCapacity, float loadFactor)
          Creates a new TCustomHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
TCustomHashMap(HashingStrategy<? super K> strategy, java.util.Map<? extends K,? extends V> map)
          Creates a new TCustomHashMap instance which contains the key/value pairs in map.
TCustomHashMap(HashingStrategy<? super K> strategy, TCustomHashMap<? extends K,? extends V> map)
          Creates a new TCustomHashMap instance which contains the key/value pairs in map.
 
Method Summary
 void clear()
          Empties the map.
 boolean containsKey(java.lang.Object key)
          checks for the present of key in the keys of the map.
 boolean containsValue(java.lang.Object val)
          checks for the presence of val in the values of the map.
 java.util.Set<java.util.Map.Entry<K,V>> entrySet()
          Returns a Set view on the entries of the map.
 boolean equals(java.lang.Object other)
          Compares this map with another map for equality of their stored entries.
 boolean forEachEntry(TObjectObjectProcedure<? super K,? super V> 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(TObjectProcedure<? super V> procedure)
          Executes procedure for each value in the map.
 V get(java.lang.Object key)
          retrieves the value for key
 int hashCode()
           
 java.util.Set<K> keySet()
          returns a Set view on the keys of the map.
 V put(K key, V value)
          Inserts a key/value pair into the map.
 void putAll(java.util.Map<? extends K,? extends V> map)
          copies the key/value mappings in map into this map.
 V putIfAbsent(K key, V 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.
 V remove(java.lang.Object key)
          Deletes a key/value pair from the map.
 void removeAt(int index)
          removes the mapping at index from the map.
 boolean retainEntries(TObjectObjectProcedure<? super K,? super V> procedure)
          Retains only those entries in the map for which the procedure returns a true value.
 int setUp(int initialCapacity)
          initialize the value array of the map.
 java.lang.String toString()
           
 void transformValues(TObjectFunction<V,V> function)
          Transform the values in this map using function.
 java.util.Collection<V> values()
          Returns a view on the values of the map.
 void writeExternal(java.io.ObjectOutput out)
           
 
Methods inherited from class gnu.trove.impl.hash.TCustomObjectHash
equals, hash
 
Methods inherited from class gnu.trove.impl.hash.TObjectHash
buildObjectContractViolation, capacity, contains, dumpExtraInfo, forEach, index, insertionIndex, insertKey, objectInfo, reportPotentialConcurrentMod, throwObjectContractViolation, throwObjectContractViolation
 
Methods inherited from class gnu.trove.impl.hash.THash
calculateGrownCapacity, compact, computeMaxSize, computeNextAutoCompactionAmount, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.Map
isEmpty, size
 

Field Detail

_values

protected transient V[] _values
the values of the map

Constructor Detail

TCustomHashMap

public TCustomHashMap()
FOR EXTERNALIZATION ONLY!!!


TCustomHashMap

public TCustomHashMap(HashingStrategy<? super K> strategy)
Creates a new TCustomHashMap instance with the default capacity and load factor.


TCustomHashMap

public TCustomHashMap(HashingStrategy<? super K> strategy,
                      int initialCapacity)
Creates a new TCustomHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.

Parameters:
initialCapacity - an int value

TCustomHashMap

public TCustomHashMap(HashingStrategy<? super K> strategy,
                      int initialCapacity,
                      float loadFactor)
Creates a new TCustomHashMap 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

TCustomHashMap

public TCustomHashMap(HashingStrategy<? super K> strategy,
                      java.util.Map<? extends K,? extends V> map)
Creates a new TCustomHashMap instance which contains the key/value pairs in map.

Parameters:
map - a Map value

TCustomHashMap

public TCustomHashMap(HashingStrategy<? super K> strategy,
                      TCustomHashMap<? extends K,? extends V> map)
Creates a new TCustomHashMap instance which contains the key/value pairs in map.

Parameters:
map - a Map value
Method Detail

setUp

public int setUp(int initialCapacity)
initialize the value array of the map.

Overrides:
setUp in class gnu.trove.impl.hash.TObjectHash<K>
Parameters:
initialCapacity - an int value
Returns:
an int value

put

public V put(K key,
             V value)
Inserts a key/value pair into the map.

Specified by:
put in interface java.util.Map<K,V>
Parameters:
key - an Object value
value - an Object value
Returns:
the previous value associated with key, or null if none was found.

putIfAbsent

public V putIfAbsent(K key,
                     V value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.

Parameters:
key - an Object value
value - an Object value
Returns:
the previous value associated with key, or null if none was found.

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 java.util.Map<K,V>
Overrides:
equals in class java.lang.Object
Parameters:
other - an Object value
Returns:
a boolean value

hashCode

public int hashCode()
Specified by:
hashCode in interface java.util.Map<K,V>
Overrides:
hashCode in class java.lang.Object

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

forEachKey

public boolean forEachKey(TObjectProcedure<? super K> procedure)
Executes procedure for each key in the map.

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(TObjectProcedure<? super V> procedure)
Executes procedure for each value in the map.

Parameters:
procedure - a TObjectProcedure value
Returns:
false if the loop over the values terminated because the procedure returned false for some value.

forEachEntry

public boolean forEachEntry(TObjectObjectProcedure<? super K,? super V> procedure)
Executes procedure for each key/value entry in the map.

Parameters:
procedure - a TObjectObjectProcedure value
Returns:
false if the loop over the entries terminated because the procedure returned false for some entry.

retainEntries

public boolean retainEntries(TObjectObjectProcedure<? super K,? super V> 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.

transformValues

public void transformValues(TObjectFunction<V,V> function)
Transform the values in this map using function.

Parameters:
function - a TObjectFunction value

rehash

protected void rehash(int newCapacity)
rehashes the map to the new capacity.

Specified by:
rehash in class gnu.trove.impl.hash.THash
Parameters:
newCapacity - an int value

get

public V get(java.lang.Object key)
retrieves the value for key

Specified by:
get in interface java.util.Map<K,V>
Parameters:
key - an Object value
Returns:
the value of key or null if no such mapping exists.

clear

public void clear()
Empties the map.

Specified by:
clear in interface java.util.Map<K,V>
Overrides:
clear in class gnu.trove.impl.hash.THash

remove

public V remove(java.lang.Object key)
Deletes a key/value pair from the map.

Specified by:
remove in interface java.util.Map<K,V>
Parameters:
key - an Object value
Returns:
an Object value

removeAt

public void removeAt(int index)
removes the mapping at index from the map.

Overrides:
removeAt in class gnu.trove.impl.hash.TObjectHash<K>
Parameters:
index - an int value

values

public java.util.Collection<V> values()
Returns a view on the values of the map.

Specified by:
values in interface java.util.Map<K,V>
Returns:
a Collection value

keySet

public java.util.Set<K> keySet()
returns a Set view on the keys of the map.

Specified by:
keySet in interface java.util.Map<K,V>
Returns:
a Set value

entrySet

public java.util.Set<java.util.Map.Entry<K,V>> entrySet()
Returns a Set view on the entries of the map.

Specified by:
entrySet in interface java.util.Map<K,V>
Returns:
a Set value

containsValue

public boolean containsValue(java.lang.Object val)
checks for the presence of val in the values of the map.

Specified by:
containsValue in interface java.util.Map<K,V>
Parameters:
val - an Object value
Returns:
a boolean value

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 java.util.Map<K,V>
Parameters:
key - an Object value
Returns:
a boolean value

putAll

public void putAll(java.util.Map<? extends K,? extends V> map)
copies the key/value mappings in map into this map.

Specified by:
putAll in interface java.util.Map<K,V>
Parameters:
map - a Map value

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
Specified by:
writeExternal in interface java.io.Externalizable
Overrides:
writeExternal in class gnu.trove.impl.hash.TCustomObjectHash<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 gnu.trove.impl.hash.TCustomObjectHash<K>
Throws:
java.io.IOException
java.lang.ClassNotFoundException

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