tuple.java

Python Development Environment (Python IDE plugin for Eclipse). Features editor, code completion, re

/*
 * Created on 24/09/2005
 */
package org.python.pydev.core;

import java.io.Serializable;

/**
 * Defines a tuple of some object, adding equals and hashCode operations
 * 
 * @author Fabio
 */
public class Tuple<X ,Y> implements Serializable{

    public X o1;
    public Y o2;

    public Tuple(X o1, Y o2) {
        this.o1 = o1;
        this.o2 = o2;
    }
    
    @Override
    public boolean equals(Object obj) {
        if(!(obj instanceof Tuple)){
            return false;
        }
        
        Tuple t2 = (Tuple) obj;
        if(o1 == t2.o1 && o2 == t2.o2){ //all the same 
        	return true;
        }
        
    	if(o1 == null && t2.o1 != null){
    		return false;
    	}
    	if(o2 == null && t2.o2 != null){
    		return false;
    	}
    	if(o1 != null && t2.o1 == null){
    		return false;
    	}
    	if(o2 != null && t2.o2 == null){
    		return false;
    	}
        
        
        if(!o1.equals(t2.o1)){
            return false;
        }
        if(!o2.equals(t2.o2)){
            return false;
        }
        return true;
    }
    
    @Override
    public int hashCode() {
    	if(o1 != null && o2 != null){
    		return o1.hashCode() * o2.hashCode();
    	}
    	if(o1 != null){
    		return o1.hashCode();
    	}
    	if(o2 != null){
    		return o2.hashCode();
    	}
    	return 7;
    }
    
    @Override
    public String toString() {
        StringBuffer buffer = new StringBuffer();
        buffer.append("Tuple [");
        buffer.append(o1);
        buffer.append(" -- ");
        buffer.append(o2);
        buffer.append("]");
        return buffer.toString();
    }
}