com.sap.cds.ql.cqn.CqnExpand Maven / Gradle / Ivy

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/************************************************************************
 * © 2019-2023 SAP SE or an SAP affiliate company. All rights reserved. *
 ************************************************************************/
package com.sap.cds.ql.cqn;

import java.util.Optional;

public interface CqnExpand extends CqnSelectList, CqnEntitySelector {

	String displayName();

	default Optional alias() {
		return ref().alias();
	}

	@Override
	default boolean isExpand() {
		return true;
	}

	@Override
	default CqnExpand asExpand() {
		return this;
	}

	/**
	 * Dispatches the handling of this {@code CqnExpand expand specification} to a
	 * given visitor.
	 * 
	 * Neither the {@link #ref() ref} nor the {@link #items() items} or the
	 * {@link #orderBy() order by clause} of the expand specification are traversed.
	 * 
	 * @param visitor the {@link CqnVisitor}
	 */
	@Override
	default void accept(CqnVisitor visitor) {
		visitor.visit(this);
	}

}