org.apache.olingo.server.api.uri.queryoption.apply.BottomTop Maven / Gradle / Ivy
/*
* 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.apply;
import org.apache.olingo.server.api.uri.queryoption.ApplyItem;
import org.apache.olingo.server.api.uri.queryoption.expression.Expression;
/**
* Represents a transformation with one of the pre-defined methods
* bottomcount
, bottompercent
, bottomsum
,
* topcount
, toppercent
, topsum
.
*/
public interface BottomTop extends ApplyItem {
/** Pre-defined method for partial aggregration. */
public enum Method { BOTTOM_COUNT, BOTTOM_PERCENT, BOTTOM_SUM, TOP_COUNT, TOP_PERCENT, TOP_SUM }
/**
* Gets the partial-aggregation method.
* @return a {@link Method} (but never null
)
*/
Method getMethod();
/**
* Gets the expression that determines the number of items to aggregate.
* @return an {@link Expression} (but never null
)
*/
Expression getNumber();
/**
* Gets the expression that determines the values to aggregate.
* @return an {@link Expression} (but never null
)
*/
Expression getValue();
}