msfroh commented on code in PR #13747: URL: https://github.com/apache/lucene/pull/13747#discussion_r1756429132
########## lucene/join/src/java/org/apache/lucene/search/join/MergeableCollector.java: ########## @@ -0,0 +1,26 @@ +/* + * 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.lucene.search.join; + +import java.io.IOException; +import org.apache.lucene.search.Collector; + +interface MergeableCollector<C extends MergeableCollector<C>> extends Collector { + + /** Folds the results from another collector of the same type into this collector. */ + void merge(C collector) throws IOException; +} Review Comment: I can reimplement my follow-up PR to do three separate CollectorManagers that handle the merge logic, I suppose. That would be more consistent with the existing Lucene code, but I'm not sure that I agree with that approach. It essentially means that every Collector needs a parallel CollectorManager that knows how to merge that Collector. For something like these join Collectors, it also means that the CollectorManager needs to know how to implement the ScoreMode (min, max, sum, or avg). -- 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...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
