code: package it.unibz.inf.data_pumper.utils;
  
  /*
   * #%L
   * dataPumper
   * %%
   * Copyright (C) 2014 Free University of Bozen-Bolzano
   * %%
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   * #L%
   */
  
  public class Pair<T,S> {
  	public final T first;
  	public final S second;
  	
  	public Pair(T first, S second){
  		this.first = first;
  		this.second = second;
  	}
  	
  	@Override 
  	public boolean equals(Object other) {
  		boolean result = false;
  		if (other instanceof Pair<?,?>) {
  			Pair<?,?> that = (Pair<?,?>) other;
  			result = (this.first == that.first && this.second == that.second);
  		}
  		return result;
  	}
  	
  	@Override public int hashCode() {
  		return (41 * (41 + this.first.hashCode()) + this.second.hashCode());
  	}
  	
  	public String toString(){
  		return "["+first.toString()+", "+second.toString()+"]";
  	}
  };
  