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package org.javimmutable.collections;

import javax.annotation.concurrent.Immutable;
import java.io.Serializable;

/**
 * Immutable container for 4 values.
 */
@Immutable
public class Tuple4
    implements Serializable
{
    private static final long serialVersionUID = -121805;

    private final A first;
    private final B second;
    private final C third;
    private final D fourth;

    public Tuple4(A first,
                  B second,
                  C third,
                  D fourth)
    {
        this.first = first;
        this.second = second;
        this.third = third;
        this.fourth = fourth;
    }

    public static  Tuple4 of(A first,
                                                     B second,
                                                     C third,
                                                     D fourth)
    {
        return new Tuple4<>(first, second, third, fourth);
    }

    public A getFirst()
    {
        return first;
    }

    public B getSecond()
    {
        return second;
    }

    public C getThird()
    {
        return third;
    }

    public D getFourth()
    {
        return fourth;
    }

    @SuppressWarnings("RedundantIfStatement")
    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        Tuple4 tuple4 = (Tuple4)o;

        if (first != null ? !first.equals(tuple4.first) : tuple4.first != null) {
            return false;
        }
        if (fourth != null ? !fourth.equals(tuple4.fourth) : tuple4.fourth != null) {
            return false;
        }
        if (second != null ? !second.equals(tuple4.second) : tuple4.second != null) {
            return false;
        }
        if (third != null ? !third.equals(tuple4.third) : tuple4.third != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode()
    {
        int result = first != null ? first.hashCode() : 0;
        result = 31 * result + (second != null ? second.hashCode() : 0);
        result = 31 * result + (third != null ? third.hashCode() : 0);
        result = 31 * result + (fourth != null ? fourth.hashCode() : 0);
        return result;
    }
}