Package net.sf.okapi.common

Class HashCodeUtil

  • public final class HashCodeUtil
extends Object
    Collected methods which allow easy implementation of hashCode. Example use case: 
     public int hashCode() {
        int result = HashCodeUtil.SEED;
        //collect the contributions of various fields
        result = HashCodeUtil.hash(result, fPrimitive);
        result = HashCodeUtil.hash(result, fObject);
        result = HashCodeUtil.hash(result, fArray);
        return result;
 }

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int SEED
      An initial value for a hashCode, to which is added contributions from fields.

    • Constructor Summary

      Constructors 
      Constructor Description
      HashCodeUtil()  

    • Field Detail

      • SEED

        public static final int SEED
        An initial value for a hashCode, to which is added contributions from fields. Using a non-zero value decreases collisions of hashCode values.
        See Also:
        Constant Field Values

    • Constructor Detail

      • HashCodeUtil

        public HashCodeUtil()

    • Method Detail

      • hash

        public static int hash​(int aSeed,
                       boolean aBoolean)
        Parameters:
        aSeed - initial value of the hashCode
        aBoolean - value to contribute to the hashCode
        Returns:
        hash code for a boolean.

      • hash

        public static int hash​(int aSeed,
                       char aChar)
        Parameters:
        aSeed - initial value of the hashCode
        aChar - value to contribute to the hashCode
        Returns:
        has code for a char value.

      • hash

        public static int hash​(int aSeed,
                       int aInt)
        Parameters:
        aSeed - initial value of the hashCode
        aInt - value to contribute to the hashCode
        Returns:
        hash code for int.

      • hash

        public static int hash​(int aSeed,
                       long aLong)
        Parameters:
        aSeed - initial value of the hashCode
        aLong - value to contribute to the hashCode
        Returns:
        hash code for a long value.

      • hash

        public static int hash​(int aSeed,
                       float aFloat)
        Parameters:
        aSeed - initial value of the hashCode
        aFloat - value to contribute to the hashCode
        Returns:
        a hash code for a float value.

      • hash

        public static int hash​(int aSeed,
                       double aDouble)
        Parameters:
        aSeed - initial value of the hashCode
        aDouble - value to contribute to the hashCode
        Returns:
        a hash code for a double value.

      • hash

        public static int hash​(int aSeed,
                       Object aObject)
        aObject is a possibly-null object field, and possibly an array. If aObject is an array, then each element may be a primitive or a possibly-null object.
        Parameters:
        aSeed - initial value of the hashCode
        aObject - value to contribute to the hashCode
        Returns:
        a hash code for an Object (Array-aware).