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Hibernate's core ORM functionality

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
 */
package org.hibernate.query.sqm.spi;

import org.hibernate.query.NavigablePath;
import org.hibernate.query.sqm.tree.domain.SqmPath;

/**
 * @author Steve Ebersole
 */
public class SqmCreationHelper {
	public static NavigablePath buildRootNavigablePath(String base, String alias) {
		return alias == null
				? new NavigablePath( base )
				: new NavigablePath( base, alias );
	}

	public static NavigablePath buildSubNavigablePath(NavigablePath lhs, String base, String alias) {
		final String localPath = alias == null
				? base
				: base + '(' + alias + ')';
		return lhs.append( localPath );
	}

	public static NavigablePath buildSubNavigablePath(SqmPath lhs, String subNavigable, String alias) {
		if ( lhs == null ) {
			throw new IllegalArgumentException(
					"`lhs` cannot be null for a sub-navigable reference - " + subNavigable
			);
		}

		return buildSubNavigablePath( lhs.getNavigablePath(), subNavigable, alias );
	}

	private SqmCreationHelper() {
	}

}