list/src/main/java/data/MultipleHMKeys4.java

package data;

import java.util.Objects;

/*
Created for when words are sorted by multiple keys, i.e. not just lemmas but lemmas and msd simultaneously.
*/
public final class MultipleHMKeys4 implements MultipleHMKeys {
    private final String k1, k2, k3, k4;

    public MultipleHMKeys4(String k1, String k2, String k3, String k4) {
        this.k1 = k1;
        this.k2 = k2;
        this.k3 = k3;
        this.k4 = k4;
    }

    public String getK1() {
        return k1;
    }

    public String getK2() {
        return k2;
    }

    public String getK3() {
        return k3;
    }

    public String getK4() {
        return k4;
    }

    public String getK5() {
        return null;
    }

    @Override
    public int hashCode() {
        return Objects.hash(k1, k2, k3, k4);
    }

    @Override
    public boolean equals(Object obj) {
        return (obj instanceof MultipleHMKeys4) && ((MultipleHMKeys4) obj).k1.equals(k1)
                && ((MultipleHMKeys4) obj).k2.equals(k2)
                && ((MultipleHMKeys4) obj).k3.equals(k3)
                && ((MultipleHMKeys4) obj).k4.equals(k4);
    }
}