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package org.aksw.commons.collections;

/** A pair (two-tuple) of objects who can differ in type.
 * @author Konrad Höffner*/
public class Pair
{
    public S first;
    public T second;

    public Pair(S first, T second)
    {
        super();
        this.first = first;
        this.second = second;
    }

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

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Pair other = (Pair) obj;
        if (first == null) {
            if (other.first != null)
                return false;
        } else if (!first.equals(other.first))
            return false;
        if (second == null) {
            if (other.second != null)
                return false;
        } else if (!second.equals(other.second))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "Pair [first=" + first + ", second=" + second + "]";
    }
}