/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.collection;
import com.espertech.esper.util.MetaDefItem;
import java.io.Serializable;
/**
* General-purpose pair of values of any type. The pair only equals another pair if
* the objects that form the pair equal, ie. first pair first object equals (.equals) the second pair first object,
* and the first pair second object equals the second pair second object.
*/
public final class UniformPair<T> implements MetaDefItem, Serializable {
private T first;
private T second;
private static final long serialVersionUID = -4974328655156016696L;
/**
* Construct pair of values.
*
* @param first is the first value
* @param second is the second value
*/
public UniformPair(final T first, final T second) {
this.first = first;
this.second = second;
}
/**
* Returns first value within pair.
*
* @return first value within pair
*/
public T getFirst() {
return first;
}
/**
* Returns second value within pair.
*
* @return second value within pair
*/
public T getSecond() {
return second;
}
/**
* Set the first value of the pair to a new value.
*
* @param first value to be set
*/
public void setFirst(T first) {
this.first = first;
}
/**
* Set the second value of the pair to a new value.
*
* @param second value to be set
*/
public void setSecond(T second) {
this.second = second;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof UniformPair)) {
return false;
}
UniformPair other = (UniformPair) obj;
return (first == null ?
other.first == null : first.equals(other.first)) &&
(second == null ?
other.second == null : second.equals(other.second));
}
public int hashCode() {
return (first == null ? 0 : first.hashCode()) ^
(second == null ? 0 : second.hashCode());
}
public String toString() {
return "Pair [" + first + ':' + second + ']';
}
}