/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence.query;
/**
* SelectItem instances are used in specifying the query's select list.
* <p/>
* The methods of this interface are used to define arguments that can be passed
* to the orderBy method for use in ordering selected items of the query result.
*/
public interface SelectItem extends OrderByItem {
/**
* Return an OrderByItem referencing the SelectItem and specifying ascending
* ordering. The SelectItem must correspond to an orderable value.
*
* @return order-by item
*/
OrderByItem asc();
/**
* Return an OrderByItem referencing the SelectItem and specifying
* descending ordering. The SelectItem must correspond to an orderable
* value.
*
* @return order-by item
*/
OrderByItem desc();
}