Package it.unimi.dsi.fastutil

Interface Hash.Strategy<K>

Enclosing interface:
Hash
public static interface Hash.Strategy<K>
A generic hash strategy.

Custom hash structures (e.g., ObjectOpenCustomHashSet) allow to hash objects using arbitrary functions, a typical example being that of arrays. Of course, one has to compare objects for equality consistently with the chosen function. A hash strategy, thus, specifies an equality method and a hash function, with the obvious property that equal objects must have the same hash code.

Note that the equals() method of a strategy must be able to handle null, too.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(K a, K b)
    Returns true if the given objects are equal with respect to this hash strategy.
    int
    hashCode(K o)
    Returns the hash code of the specified object with respect to this hash strategy.

  • Method Details

    • hashCode

      int hashCode(K o)
      Returns the hash code of the specified object with respect to this hash strategy.
      Parameters:
      o - an object (or null).
      Returns:
      the hash code of the given object with respect to this hash strategy.

    • equals

      boolean equals(K a, K b)
      Returns true if the given objects are equal with respect to this hash strategy.
      Parameters:
      a - an object (or null).
      b - another object (or null).
      Returns:
      true if the two specified objects are equal with respect to this hash strategy.