Generic Pair : Generic Collection « Generics « Java

1. Java
2. Generics
3. Generic Collection

Generic Pair

      

/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
//package org.cspoker.common.util;

public class Pair<L,R> {

  private final L left;
  private final R right;
  
  public Pair(L left, R right) {
    if(left==null){
      throw new IllegalArgumentException("Left value is not effective.");
    }
    if(right==null){
      throw new IllegalArgumentException("Right value is not effective.");
    }
    this.left =left;
    this.right = right;
  }
  
  public L getLeft() {
    return this.left;
  }
  
  public R getRight() {
    return this.right;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((left == null) ? 0 : left.hashCode());
    result = prime * result + ((right == null) ? 0 : right.hashCode());
    return result;
  }

  @SuppressWarnings("unchecked")
  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (!(obj instanceof Pair))
      return false;
    Pair<Object, Object> other = (Pair<Object, Object>) obj;
    if (left == null) {
      if (other.left != null)
        return false;
    } else if (!left.equals(other.left))
      return false;
    if (right == null) {
      if (other.right != null)
        return false;
    } else if (!right.equals(other.right))
      return false;
    return true;
  }
  
  @Override
  public String toString() {
    return "<"+left.toString()+","+right.toString()+">";
  }
  
}

   
    
    
    
    
    
  

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