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package cdc.mf.model;

/**
 * Interface of elements that have an optional {@link MfCardinality cardinality}.
 *
 * @author Damien Carbonne
 */
public interface MfCardinalityItem extends MfElement {
    /**
     * @return The element {@link MfCardinality cardinality}.
     */
    public MfCardinality getCardinality();

    /**
     * @return {@code true} if this element has a cardinality.
     */
    public default boolean hasCardinality() {
        return getCardinality() != null;
    }

    /**
     * @return The effective cardinality, that is the cardinality if it exists,
     *         or {@link MfCardinality#ONE ONE} otherwise.
     */
    public default MfCardinality getEffectiveCardinality() {
        return getCardinality() == null
                ? MfCardinality.ONE
                : getCardinality();
    }
}