package de.jaret.util.misc;
   
   public class Pair<L, R> {
   
       private final L _left;
       private final R _right;
   
       public R getRight() {
           return _right;
      }
  
      public L getLeft() {
          return _left;
      }
  
      public Pair(final L left, final R right) {
          _left = left;
          _right = right;
      }
  
      public final boolean equals(Object o) {
          if (!(o instanceof Pair))
              return false;
  
          final Pair<?, ?> other = (Pair<?, ?>) o;
          return equal(getLeft(), other.getLeft()) && equal(getRight(), other.getRight());
      }
  
      public static final boolean equal(Object o1, Object o2) {
          if (o1 == null) {
              return o2 == null;
          }
          return o1.equals(o2);
      }
  
      public int hashCode() {
          int hLeft = getLeft() == null ? 0 : getLeft().hashCode();
          int hRight = getRight() == null ? 0 : getRight().hashCode();
  
          return hLeft + (57 * hRight);
      }
  }