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package cdc.util.tuples;

import java.util.Objects;

/**
 * Tuple of 1 value.
 *
 * @author Damien Carbonne
 *
 * @param  Value 1 type.
 */
public class Tuple1 implements Tuple {
    protected final T0 value0;

    public Tuple1(T0 value0) {
        this.value0 = value0;
    }

    @Override
    public final int size() {
        return 1;
    }

    @Override
    public Object getValue(int index) {
        if (index == 0) {
            return value0;
        } else {
            throw new IndexOutOfBoundsException();
        }
    }

    /**
     * @return Value 0.
     */
    public final T0 getValue0() {
        return value0;
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) {
            return true;
        }
        if (!(other instanceof Tuple1)) {
            return false;
        }
        final Tuple1 o = (Tuple1) other;
        return Objects.equals(value0, o.value0);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(value0);
    }

    @Override
    public String toString() {
        return "[" + Objects.toString(value0) + "]";
    }
}