Java Tuple (Pair<L, R>)

/**
 * Copy of com.google.gwt.dev.util.Pair
 * @param <L>
 * @param <R>
 */
public class Pair<L, R> {
    public static <L, R> Pair<L, R> create(L l, R r) {
        return new Pair<>(l, r);
    }

    public final L left;
    public final R right;

    private Pair(L left, R right) {
        this.left = left;
        this.right = right;
    }

    @SuppressWarnings("rawtypes")
    @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 (left == null) {
            if (other.left != null) {
                return false;
            }
        } else if (!left.equals(other.left)) {
            return false;
        }
        if (right == null) {
            if (other.right != null) {
                return false;
            }
        } else if (!right.equals(other.right)) {
            return false;
        }
        return true;
    }

    public L getLeft() {
        return left;
    }

    public R getRight() {
        return right;
    }

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

    @Override
    public String toString() {
        return "(" + left + "," + right + ")";
    }
}