/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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 net.ontopia.persistence.query.jdo;
/**
* INTERNAL: Represents an aggregate function in a JDO query. An
* aggregate function can be used as part of the select and ordering
* components of a JDO query.
*/
public interface JDOAggregateIF {
/**
* INTERNAL: Constant referring to the COUNT aggregate function.
*/
public static final int COUNT = 1;
/**
* INTERNAL: Returns the aggregate function type indicated by one of
* the constants in the {@link JDOAggregateIF} interface.
*/
public int getType();
/**
* INTERNAL: Returns the JDOValueIF that the aggregate function is
* to be evaluated against.
*/
public JDOValueIF getValue();
}