Package it.unimi.dsi.fastutil.objects

Class Object2DoubleFunctions.PrimitiveFunction<K>

java.lang.Object
it.unimi.dsi.fastutil.objects.Object2DoubleFunctions.PrimitiveFunction<K>
All Implemented Interfaces:
Function<K,​java.lang.Double>, Object2DoubleFunction<K>, java.util.function.Function<K,​java.lang.Double>, java.util.function.ToDoubleFunction<K>
Enclosing class:
Object2DoubleFunctions
public static class Object2DoubleFunctions.PrimitiveFunction<K>
extends java.lang.Object
implements Object2DoubleFunction<K>
An adapter for mapping generic total functions to partial primitive functions.

  • Method Details

    • containsKey

      public boolean containsKey​(java.lang.Object key)
      Description copied from interface: Function
      Returns true if this function contains a mapping for the specified key.

      Note that for some kind of functions (e.g., hashes) this method will always return true. This default implementation, in particular, always return true.

      Specified by:
      containsKey in interface Function<K,​java.lang.Double>
      Parameters:
      key - the key.
      Returns:
      true if this function associates a value to key.
      See Also:
      Map.containsKey(Object)

    • getDouble

      public double getDouble​(java.lang.Object key)
      Description copied from interface: Object2DoubleFunction
      Returns the value to which the given key is mapped.
      Specified by:
      getDouble in interface Object2DoubleFunction<K>
      Parameters:
      key - the key.
      Returns:
      the corresponding value, or the default return value if no value was present for the given key.
      See Also:
      Function.get(Object)

    • getOrDefault

      public double getOrDefault​(java.lang.Object key, double defaultValue)
      Description copied from interface: Object2DoubleFunction
      Returns the value associated by this function to the specified key, or give the specified value if not present.
      Specified by:
      getOrDefault in interface Object2DoubleFunction<K>
      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)

    • get

      @Deprecated public java.lang.Double get​(java.lang.Object key)
      Deprecated.
      Description copied from interface: Object2DoubleFunction
      Returns the value associated by this function to the specified key.
      Specified by:
      get in interface Function<K,​java.lang.Double>
      Specified by:
      get in interface Object2DoubleFunction<K>
      Parameters:
      key - the key.
      Returns:
      the corresponding value, or null if no value was present for the given key.
      See Also:
      Map.get(Object)

    • getOrDefault

      @Deprecated public java.lang.Double getOrDefault​(java.lang.Object key, java.lang.Double defaultValue)
      Deprecated.
      Description copied from interface: Object2DoubleFunction
      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,​java.lang.Double>
      Specified by:
      getOrDefault in interface Object2DoubleFunction<K>
      Parameters:
      key - the key.
      defaultValue - the default value to return if not present.
      Returns:
      the corresponding value, or defaultValue if no value was present for the given key.
      See Also:
      Map.getOrDefault(Object, Object)

    • put

      @Deprecated public java.lang.Double put​(K key, java.lang.Double value)
      Deprecated.
      Description copied from interface: Object2DoubleFunction
      Associates the specified value with the specified key in this function (optional operation).
      Specified by:
      put in interface Function<K,​java.lang.Double>
      Specified by:
      put in interface Object2DoubleFunction<K>
      Parameters:
      key - the key.
      value - the value.
      Returns:
      the old value, or null if no value was present for the given key.
      See Also:
      Map.put(Object,Object)