Class TLongObjectHashMap<V>

java.lang.Object
gnu.trove.impl.hash.THash
gnu.trove.impl.hash.TPrimitiveHash
gnu.trove.impl.hash.TLongHash
gnu.trove.map.hash.TLongObjectHashMap<V>
All Implemented Interfaces:
TLongObjectMap<V>, Externalizable, Serializable

public class TLongObjectHashMap<V> extends gnu.trove.impl.hash.TLongHash implements TLongObjectMap<V>, Externalizable
An open addressed Map implementation for long keys and Object values. Created: Sun Nov 4 08:52:45 2001
See Also:
  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    protected class 
    a view onto the values of the map.
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected V[]
    the values of the map
    protected long
    the value that represents null in the key set.

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

    _set, consumeFreeSlot, no_entry_value

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

    _states, FREE, FULL, REMOVED

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

    _autoCompactionFactor, _autoCompactRemovesRemaining, _autoCompactTemporaryDisable, _free, _loadFactor, _maxSize, _size, DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR
  • Constructor Summary

    Constructors
    Constructor
    Description
    Creates a new TLongObjectHashMap instance with the default capacity and load factor.
    TLongObjectHashMap(int initialCapacity)
    Creates a new TLongObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
    TLongObjectHashMap(int initialCapacity, float loadFactor)
    Creates a new TLongObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.
    TLongObjectHashMap(int initialCapacity, float loadFactor, long noEntryKey)
    Creates a new TLongObjectHashMap instance with a prime value at or near the specified capacity and load factor.
    Creates a new TLongObjectHashMap that contains the entries in the map passed to it.
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    Empties the collection.
    boolean
    containsKey(long key)
    Returns true if this map contains a mapping for the specified key.
    boolean
    Returns true if this map maps one or more keys to the specified value.
    boolean
    equals(Object other)
    Compares the specified object with this map for equality.
    boolean
    forEachEntry(TLongObjectProcedure<? super V> procedure)
    Executes procedure for each key/value entry in the map.
    boolean
    Executes procedure for each key in the map.
    boolean
    forEachValue(TObjectProcedure<? super V> procedure)
    Executes procedure for each value in the map.
    get(long key)
    Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
    long
    Returns the value that represents null in the TLongObjectMap.keySet().
    int
    Returns the hash code value for this map.
    Returns a TLongObjectIterator with access to this map's keys and values.
    long[]
    Returns a copy of the keys of the map as an array.
    long[]
    keys(long[] dest)
    Returns a copy of the keys of the map as an array.
    Returns a TLongSet view of the keys contained in this map.
    put(long key, V value)
    Associates the specified value with the specified key in this map (optional operation).
    void
    putAll(TLongObjectMap<? extends V> map)
    Put all the entries from the given map into this map.
    void
    putAll(Map<? extends Long,? extends V> map)
    Copies all of the mappings from the specified map to this map (optional operation).
    putIfAbsent(long key, V value)
    Inserts a key/value pair into the map if the specified key is not already associated with a value.
    void
     
    protected void
    rehash(int newCapacity)
    Rehashes the set.
    remove(long key)
    Removes the mapping for a key from this map if it is present (optional operation).
    protected void
    removeAt(int index)
    Releases the element currently stored at index.
    boolean
    retainEntries(TLongObjectProcedure<? super V> 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.
     
    void
    Transform the values in this map using function.
    Returns a Collection view of the values contained in this map.
    Returns the values of the map as an Object array.
    V[]
    values(V[] dest)
    Returns the values of the map using an existing array.
    void
     

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

    contains, forEach, getNoEntryValue, index, insertKey

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

    capacity

    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 gnu.trove.map.TLongObjectMap

    isEmpty, size
  • Field Details

    • _values

      protected transient V[] _values
      the values of the map
    • no_entry_key

      protected long no_entry_key
      the value that represents null in the key set.
  • Constructor Details

    • TLongObjectHashMap

      public TLongObjectHashMap()
      Creates a new TLongObjectHashMap instance with the default capacity and load factor.
    • TLongObjectHashMap

      public TLongObjectHashMap(int initialCapacity)
      Creates a new TLongObjectHashMap instance with a prime capacity equal to or greater than initialCapacity and with the default load factor.
      Parameters:
      initialCapacity - an int value
    • TLongObjectHashMap

      public TLongObjectHashMap(int initialCapacity, float loadFactor)
      Creates a new TLongObjectHashMap 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
    • TLongObjectHashMap

      public TLongObjectHashMap(int initialCapacity, float loadFactor, long noEntryKey)
      Creates a new TLongObjectHashMap 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.
      noEntryKey - the value used to represent null in the key set.
    • TLongObjectHashMap

      public TLongObjectHashMap(TLongObjectMap<? extends V> map)
      Creates a new TLongObjectHashMap that contains the entries in the map passed to it.
      Parameters:
      map - the TLongObjectMap to be copied.
  • Method Details

    • setUp

      protected int setUp(int initialCapacity)
      initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
      Overrides:
      setUp in class gnu.trove.impl.hash.TLongHash
      Parameters:
      initialCapacity - an int value
      Returns:
      the actual capacity chosen
    • rehash

      protected void rehash(int newCapacity)
      Rehashes the set.
      Specified by:
      rehash in class gnu.trove.impl.hash.THash
      Parameters:
      newCapacity - an int value
    • getNoEntryKey

      public long getNoEntryKey()
      Returns the value that represents null in the TLongObjectMap.keySet(). The default value is generally zero, but can be changed during construction of the collection.
      Specified by:
      getNoEntryKey in interface TLongObjectMap<V>
      Returns:
      the value that represents a null value in this collection.
    • containsKey

      public boolean containsKey(long key)
      Returns true if this map contains a mapping for the specified key. More formally, returns true if and only if this map contains a mapping for a key k such that key.equals(k). (There can be at most one such mapping.)
      Specified by:
      containsKey in interface TLongObjectMap<V>
      Parameters:
      key - key whose presence in this map is to be tested
      Returns:
      true if this map contains a mapping for the specified key
    • containsValue

      public boolean containsValue(Object val)
      Returns true if this map maps one or more keys to the specified value. More formally, returns true if and only if this map contains at least one mapping to a value v such that (value==null ? v==null : value.equals(v)). This operation will probably require time linear in the map size for most implementations of the Map interface.
      Specified by:
      containsValue in interface TLongObjectMap<V>
      Parameters:
      val - value whose presence in this map is to be tested
      Returns:
      true if this map maps one or more keys to the specified value
    • get

      public V get(long key)
      Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

      More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

      If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

      Specified by:
      get in interface TLongObjectMap<V>
      Parameters:
      key - the key whose associated value is to be returned
      Returns:
      the long value to which the specified key is mapped, or null if this map contains no mapping for the key
    • put

      public V put(long key, V value)
      Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map m is said to contain a mapping for a key k if and only if m.containsKey(k) would return true.)
      Specified by:
      put in interface TLongObjectMap<V>
      Parameters:
      key - key with which the specified value is to be associated
      value - an long value value to be associated with the specified key
      Returns:
      the previous value associated with key, or no_entry_value if there was no mapping for key. (A no_entry_value return can also indicate that the map previously associated null with key, if the implementation supports null values.)
      See Also:
    • putIfAbsent

      public V putIfAbsent(long key, V 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 TLongObjectMap<V>
      Parameters:
      key - key with which the specified value is to be associated
      value - an long value to be associated with the specified key
      Returns:
      the previous value associated with key, or null if none was found.
    • remove

      public V remove(long key)
      Removes the mapping for a key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that key.equals(k), that mapping is removed. (The map can contain at most one such mapping.)

      Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

      If this map permits null values, then a return value of null does not necessarily indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.

      The map will not contain a mapping for the specified key once the call returns.

      Specified by:
      remove in interface TLongObjectMap<V>
      Parameters:
      key - key whose mapping is to be removed from the map
      Returns:
      the previous long value associated with key, or null if there was no mapping for key.
    • removeAt

      protected void removeAt(int index)
      Releases the element currently stored at index.
      Overrides:
      removeAt in class gnu.trove.impl.hash.TLongHash
      Parameters:
      index - an int value
    • putAll

      public void putAll(Map<? extends Long,? extends V> 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 TLongObjectMap<V>
      Parameters:
      map - mappings to be stored in this map
    • putAll

      public void putAll(TLongObjectMap<? extends V> map)
      Put all the entries from the given map into this map.
      Specified by:
      putAll in interface TLongObjectMap<V>
      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 TLongObjectMap<V>
      Overrides:
      clear in class gnu.trove.impl.hash.THash
    • keySet

      public TLongSet keySet()
      Returns a TLongSet 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 TLongObjectMap<V>
      Returns:
      a set view of the keys contained in this map
    • keys

      public long[] 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 TLongObjectMap<V>
      Returns:
      a copy of the keys of the map as an array.
    • keys

      public long[] keys(long[] dest)
      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 TLongObjectMap<V>
      Parameters:
      dest - 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 Collection<V> valueCollection()
      Returns a Collection 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 Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.
      Specified by:
      valueCollection in interface TLongObjectMap<V>
      Returns:
      a collection view of the values contained in this map
    • values

      public Object[] values()
      Returns the values of the map as an Object array. Note that the array returned is typed as an Object[] and may not be cast to a more specific type. See TLongObjectMap.values(V[]) for a version which allows specifically typed arrays. Changes to the array of values will not be reflected in the map nor vice-versa.
      Specified by:
      values in interface TLongObjectMap<V>
      Returns:
      the values of the map as an array of long values.
    • values

      public V[] values(V[] dest)
      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 TLongObjectMap<V>
      Parameters:
      dest - 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 long values.
    • iterator

      public TLongObjectIterator<V> iterator()
      Returns a TLongObjectIterator with access to this map's keys and values.
      Specified by:
      iterator in interface TLongObjectMap<V>
      Returns:
      a TLongObjectIterator with access to this map's keys and values.
    • forEachKey

      public boolean forEachKey(TLongProcedure procedure)
      Executes procedure for each key in the map.
      Specified by:
      forEachKey in interface TLongObjectMap<V>
      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.
      Specified by:
      forEachValue in interface TLongObjectMap<V>
      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(TLongObjectProcedure<? super V> procedure)
      Executes procedure for each key/value entry in the map.
      Specified by:
      forEachEntry in interface TLongObjectMap<V>
      Parameters:
      procedure - a TLongObjectProcedure value
      Returns:
      false if the loop over the entries terminated because the procedure returned false for some entry.
    • retainEntries

      public boolean retainEntries(TLongObjectProcedure<? super V> procedure)
      Retains only those entries in the map for which the procedure returns a true value.
      Specified by:
      retainEntries in interface TLongObjectMap<V>
      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.
      Specified by:
      transformValues in interface TLongObjectMap<V>
      Parameters:
      function - a TObjectFunction value
    • equals

      public boolean equals(Object other)
      Compares the specified object with this map for equality. Returns true if the given object is also a map and the two maps represent the same mappings. More formally, two maps m1 and m2 represent the same mappings if m1.entrySet().equals(m2.entrySet()). This ensures that the equals method works properly across different implementations of the Map interface.
      Specified by:
      equals in interface TLongObjectMap<V>
      Overrides:
      equals in class Object
      Parameters:
      other - object to be compared for equality with this map
      Returns:
      true if the specified object is equal to this map
    • 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 TLongObjectMap<V>
      Overrides:
      hashCode in class Object
      Returns:
      the hash code value for this map
      See Also:
    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Specified by:
      writeExternal in interface Externalizable
      Overrides:
      writeExternal in class gnu.trove.impl.hash.THash
      Throws:
      IOException
    • readExternal

      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
      Specified by:
      readExternal in interface Externalizable
      Overrides:
      readExternal in class gnu.trove.impl.hash.THash
      Throws:
      IOException
      ClassNotFoundException
    • toString

      public String toString()
      Overrides:
      toString in class Object