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      1 /*
      2  *******************************************************************************
      3  * Copyright (C) 2002-2004, International Business Machines Corporation and    *
      4  * others. All Rights Reserved.                                                *
      5  *******************************************************************************
      6  */
      7 package com.ibm.icu.dev.test.util;
      8 
      9 public interface Equator {
     10     /**
     11       * Comparator function. If overridden, must handle case of null,
     12       * and compare any two objects that could be compared.
     13       * Must obey normal rules of symmetry: a=b => b=a
     14       * and transitivity: a=b & b=c => a=b)
     15       * @param a
     16       * @param b
     17       * @return true if a and b are equal
     18       */
     19      public boolean isEqual(Object a, Object b);
     20 
     21     /**
     22      * Must obey normal rules: a=b => getHashCode(a)=getHashCode(b)
     23      * @param object
     24      * @return a hash code for the object
     25      */
     26     public int getHashCode(Object object);
     27 }