jpountz commented on a change in pull request #680: LUCENE-8803: Provide a FieldComparator to allow sorting by a feature from a FeatureField URL: https://github.com/apache/lucene-solr/pull/680#discussion_r285623249
########## File path: lucene/core/src/java/org/apache/lucene/search/FeatureComparatorSource.java ########## @@ -0,0 +1,131 @@ +/* + * 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; + +import java.io.IOException; + +import org.apache.lucene.document.FeatureField; +import org.apache.lucene.index.LeafReaderContext; +import org.apache.lucene.index.PostingsEnum; +import org.apache.lucene.index.Terms; +import org.apache.lucene.index.TermsEnum; +import org.apache.lucene.util.BytesRef; + +/** Provides a comparator that parses a feature field's values as float and sorts by descending value */ +public class FeatureComparatorSource extends FieldComparatorSource { Review comment: Can you make it pkg-private and expose it via a factory method on the FeatureField class similarly to `LatLonDocValuesField#newDistanceSort`? Exposing it via a SortField rather than a ComparatorSource might also help with not having to support reverse order (only decreasing order makes sense for features I think?). ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
