Package org.djutils.immutablecollections

Class ImmutableHashMap<K,V>

java.lang.Object
org.djutils.immutablecollections.ImmutableAbstractMap<K,V>
org.djutils.immutablecollections.ImmutableHashMap<K,V>
Type Parameters:
K - the key type of content of this Map
V - the value type of content of this Map
All Implemented Interfaces:
ImmutableMap<K,V>
public class ImmutableHashMap<K,V> extends ImmutableAbstractMap<K,V>
An immutable wrapper for a HashMap.

Copyright (c) 2016-2025 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://djutils.org. The DJUTILS project is distributed under a three-clause BSD-style license, which can be found at https://djutils.org/docs/license.html.

Author:
Alexander Verbraeck, Peter Knoppers

  • Constructor Details

    • ImmutableHashMap

      public ImmutableHashMap(Map<K,V> map)
      Parameters:
      map - the map to use for the immutable map.

    • ImmutableHashMap

      public ImmutableHashMap(Map<K,V> map, Immutable copyOrWrap)
      Parameters:
      map - the map to use for the immutable map.
      copyOrWrap - WRAP stores a pointer to the original collection

    • ImmutableHashMap

      public ImmutableHashMap(ImmutableAbstractMap<K,V> immutableMap)
      Parameters:
      immutableMap - the map to use for the immutable map.

    • ImmutableHashMap

      public ImmutableHashMap(ImmutableAbstractMap<K,V> immutableMap, Immutable copyOrWrap)
      Parameters:
      immutableMap - the map to use for the immutable map.
      copyOrWrap - WRAP stores a pointer to the original collection

  • Method Details

    • getUnderlyingMap

      protected final Map<K,V> getUnderlyingMap()
      Description copied from class: ImmutableAbstractMap
      Return the raw underlying map.
      Overrides:
      getUnderlyingMap in class ImmutableAbstractMap<K,V>
      Returns:
      the raw underlying map

    • toMap

      public final Map<K,V> toMap()
      Description copied from interface: ImmutableMap
      Returns a modifiable copy of this immutable map.
      Returns:
      a modifiable copy of this immutable map.

    • keySet

      public final ImmutableSet<K> keySet()
      Description copied from interface: ImmutableMap
      Returns a Set view of the keys contained in this map.
      Returns:
      an immutable set of the keys contained in this map

    • entrySet

      public ImmutableSet<ImmutableMap.ImmutableEntry<K,V>> entrySet()
      Description copied from interface: ImmutableMap
      Returns a Set view of the entries contained in this map.
      Returns:
      an immutable set of the entries contained in this map

    • toString

      public String toString()
      Description copied from interface: ImmutableMap
      Force to redefine toString.
      Specified by:
      toString in interface ImmutableMap<K,V>
      Overrides:
      toString in class Object
      Returns:
      a description of this immutable map