/*
 * 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.olingo.server.api.uri.queryoption;

import org.apache.olingo.server.api.uri.queryoption.expression.Expression;

/**
 * Represents a single orderby information
 * For example: http://.../Employees?$orderby=Name
 */
public interface OrderByItem {

  /**
   * Returns the sort order of the orderby item
   * @return if false (default) the sort order is ascending, if true the sort order is descending
   */
  boolean isDescending();

  /**
   * @return Expression which is used to order the items
   */
  Expression getExpression();

}