Class Object2ObjectMaps.UnmodifiableMap<K,​V>

java.lang.Object
it.unimi.dsi.fastutil.objects.AbstractObject2ObjectFunction<K,​V>
it.unimi.dsi.fastutil.objects.Object2ObjectFunctions.UnmodifiableFunction<K,​V>
it.unimi.dsi.fastutil.objects.Object2ObjectMaps.UnmodifiableMap<K,​V>
All Implemented Interfaces:
Function<K,​V>, Object2ObjectFunction<K,​V>, Object2ObjectMap<K,​V>, java.io.Serializable, java.util.function.Function<K,​V>, java.util.Map<K,​V>
Direct Known Subclasses:
Object2ObjectSortedMaps.UnmodifiableSortedMap
Enclosing class:
Object2ObjectMaps

public static class Object2ObjectMaps.UnmodifiableMap<K,​V>
extends Object2ObjectFunctions.UnmodifiableFunction<K,​V>
implements Object2ObjectMap<K,​V>, java.io.Serializable
An unmodifiable wrapper class for maps.
See Also:
Serialized Form
  • Method Details

    • containsValue

      public boolean containsValue​(java.lang.Object v)
      Specified by:
      containsValue in interface java.util.Map<K,​V>
    • putAll

      public void putAll​(java.util.Map<? extends K,​? extends V> m)
      Specified by:
      putAll in interface java.util.Map<K,​V>
    • object2ObjectEntrySet

      public ObjectSet<Object2ObjectMap.Entry<K,​V>> object2ObjectEntrySet()
      Description copied from interface: Object2ObjectMap
      Returns a type-specific set view of the mappings contained in this map.

      This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Map.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).

      Specified by:
      object2ObjectEntrySet in interface Object2ObjectMap<K,​V>
      Returns:
      a type-specific set view of the mappings contained in this map.
      See Also:
      Map.entrySet()
    • entrySet

      public ObjectSet<java.util.Map.Entry<K,​V>> entrySet()
      Returns a set view of the mappings contained in this map.
      Specified by:
      entrySet in interface java.util.Map<K,​V>
      Specified by:
      entrySet in interface Object2ObjectMap<K,​V>
      Returns:
      a set view of the mappings contained in this map.
      See Also:
      Map.entrySet()
    • keySet

      public ObjectSet<K> keySet()
      Description copied from interface: Object2ObjectMap
      Specified by:
      keySet in interface java.util.Map<K,​V>
      Specified by:
      keySet in interface Object2ObjectMap<K,​V>
      Returns:
      a set view of the keys contained in this map.
      See Also:
      Map.keySet()
    • values

      public ObjectCollection<V> values()
      Description copied from interface: Object2ObjectMap
      Specified by:
      values in interface java.util.Map<K,​V>
      Specified by:
      values in interface Object2ObjectMap<K,​V>
      Returns:
      a set view of the values contained in this map.
      See Also:
      Map.values()
    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface java.util.Map<K,​V>
    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface java.util.Map<K,​V>
      Overrides:
      hashCode in class Object2ObjectFunctions.UnmodifiableFunction<K,​V>
    • equals

      public boolean equals​(java.lang.Object o)
      Specified by:
      equals in interface java.util.Map<K,​V>
      Overrides:
      equals in class Object2ObjectFunctions.UnmodifiableFunction<K,​V>
    • getOrDefault

      public V getOrDefault​(java.lang.Object key, V defaultValue)
      Description copied from interface: Object2ObjectFunction
      Returns the value associated by this function to the specified key, or give the specified value if not present.
      Specified by:
      getOrDefault in interface Function<K,​V>
      Specified by:
      getOrDefault in interface java.util.Map<K,​V>
      Specified by:
      getOrDefault in interface Object2ObjectFunction<K,​V>
      Specified by:
      getOrDefault in interface Object2ObjectMap<K,​V>
      Overrides:
      getOrDefault in class Object2ObjectFunctions.UnmodifiableFunction<K,​V>
      Parameters:
      key - the key.
      defaultValue - the value to return if not present.
      Returns:
      the corresponding value, or defaultValue if no value was present for the given key.
      See Also:
      Function.getOrDefault(Object, Object)
    • forEach

      public void forEach​(java.util.function.BiConsumer<? super K,​? super V> action)
      Specified by:
      forEach in interface java.util.Map<K,​V>
      Specified by:
      forEach in interface Object2ObjectMap<K,​V>
    • replaceAll

      public void replaceAll​(java.util.function.BiFunction<? super K,​? super V,​? extends V> function)
      Specified by:
      replaceAll in interface java.util.Map<K,​V>
    • putIfAbsent

      public V putIfAbsent​(K key, V value)
      Description copied from interface: Object2ObjectMap
      If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.
      Specified by:
      putIfAbsent in interface java.util.Map<K,​V>
      Specified by:
      putIfAbsent in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is to be associated.
      value - value to be associated with the specified key.
      Returns:
      the previous value associated with the specified key, or the default return value if there was no mapping for the key.
      See Also:
      Map.putIfAbsent(Object, Object)
    • remove

      public boolean remove​(java.lang.Object key, java.lang.Object value)
      Description copied from interface: Object2ObjectMap
      Removes the entry for the specified key only if it is currently mapped to the specified value.
      Specified by:
      remove in interface java.util.Map<K,​V>
      Specified by:
      remove in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is associated.
      value - value expected to be associated with the specified key.
      Returns:
      true if the value was removed.
      See Also:
      Map.remove(Object, Object)
    • replace

      public V replace​(K key, V value)
      Description copied from interface: Object2ObjectMap
      Replaces the entry for the specified key only if it is currently mapped to some value.
      Specified by:
      replace in interface java.util.Map<K,​V>
      Specified by:
      replace in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is associated.
      value - value to be associated with the specified key.
      Returns:
      the previous value associated with the specified key, or the default return value if there was no mapping for the key.
      See Also:
      Map.replace(Object, Object)
    • replace

      public boolean replace​(K key, V oldValue, V newValue)
      Description copied from interface: Object2ObjectMap
      Replaces the entry for the specified key only if currently mapped to the specified value.
      Specified by:
      replace in interface java.util.Map<K,​V>
      Specified by:
      replace in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is associated.
      oldValue - value expected to be associated with the specified key.
      newValue - value to be associated with the specified key.
      Returns:
      true if the value was replaced.
      See Also:
      Map.replace(Object, Object, Object)
    • computeIfPresent

      public V computeIfPresent​(K key, java.util.function.BiFunction<? super K,​? super V,​? extends V> remappingFunction)
      Description copied from interface: Object2ObjectMap
      If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
      Specified by:
      computeIfPresent in interface java.util.Map<K,​V>
      Specified by:
      computeIfPresent in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is to be associated.
      remappingFunction - the function to compute a value.
      Returns:
      the new value associated with the specified key, or the default return value if none.
      See Also:
      Map.computeIfPresent(Object, java.util.function.BiFunction)
    • compute

      public V compute​(K key, java.util.function.BiFunction<? super K,​? super V,​? extends V> remappingFunction)
      Description copied from interface: Object2ObjectMap
      Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).

      If the function returns null, the mapping is removed (or remains absent if initially absent). If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

      Specified by:
      compute in interface java.util.Map<K,​V>
      Specified by:
      compute in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the specified value is to be associated.
      remappingFunction - the function to compute a value.
      Returns:
      the new value associated with the specified key, or the default return value if none.
      See Also:
      Map.compute(Object, java.util.function.BiFunction)
    • merge

      public V merge​(K key, V value, java.util.function.BiFunction<? super V,​? super V,​? extends V> remappingFunction)
      Description copied from interface: Object2ObjectMap
      If the specified key is not already associated with a value, associates it with the given value. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result is null.
      Specified by:
      merge in interface java.util.Map<K,​V>
      Specified by:
      merge in interface Object2ObjectMap<K,​V>
      Parameters:
      key - key with which the resulting value is to be associated.
      value - the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.
      remappingFunction - the function to recompute a value if present.
      Returns:
      the new value associated with the specified key, or the default return value if no value is associated with the key.
      See Also:
      Map.merge(Object, Object, java.util.function.BiFunction)