ajian2002 commented on code in PR #121: URL: https://github.com/apache/flink-table-store/pull/121#discussion_r877701752
########## flink-table-store-core/src/main/java/org/apache/flink/table/store/file/mergetree/compact/AggregateFunction.java: ########## @@ -0,0 +1,159 @@ +/* + * 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.flink.table.store.file.mergetree.compact; + +import java.io.Serializable; + +/** + * 自定义的列聚合抽象类. + * + * @param <T> + */ +public interface AggregateFunction<T> extends Serializable { + // T aggregator; + + T getResult(); + + default void init() { + reset(); + } + + void reset(); + + default void aggregate(Object value) { + aggregate(value, true); + } + + void aggregate(Object value, boolean add); + + void reset(Object value); Review Comment: We should consider keeping some common methods and prepare for future features -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
