Column.java

package chess;

import java.util.Arrays;
import javax.lang.model.element.NestingKind;

public enum Column {

    A("A"),
    B("B"),
    C("C"),
    D("D"),
    E("E"),
    F("F"),
    G("G"),
    H("H");

    private final String index;

    Column(String index) {
        this.index = index;
    }

    public static Column from(String index) {
        return Arrays.stream(Column.values())
                .filter(column -> column.index.equals(index))
                .findFirst()
                .get();
    }

    public boolean isFarLeft() {
        return ordinal() == 0;
    }

    public boolean isFarRight() {
        return ordinal() + 1 == values().length;
    }

    public boolean canMoveLeft(final int step) {
        return ordinal() - step >= 0;
    }

    public Column moveLeft() {
        return moveLeft(1);
    }

    public Column moveLeft(final int step) {
        if (canMoveLeft(step)) {
            return values()[ordinal() - step];
        }

        throw new IllegalStateException("움직일 수 없는 위치입니다.");
    }

    public boolean canMoveRight(final int step) {
        return ordinal() + step < values().length;
    }

    public Column moveRight() {
        return moveRight(1);
    }

    public Column moveRight(final int step) {
        if (canMoveRight(step)) {
            return values()[ordinal() + step];
        }

        throw new IllegalStateException("움직일 수 없는 위치입니다.");
    }
}