/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.executor;
import java.util.List;
/**
* 合并执行单元.
*
* @param <I> 入参类型
* @param <O> 出参类型
*
* @author gaohongtao
*/
interface MergeUnit<I, O> {
/**
* 合并执行结果.
*
* @param params 合并前数据
* @return 合并后结果
*/
O merge(List<I> params);
}