[GitHub] [lucene] uschindler commented on a diff in pull request #11909: hunspell: introduce FragmentChecker to speed up ModifyingSuggester

[GitBox <gi...@apache.org>]

uschindler commented on code in PR #11909:
URL: https://github.com/apache/lucene/pull/11909#discussion_r1020151061


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lucene/analysis/common/src/java/org/apache/lucene/analysis/hunspell/FragmentChecker.java:
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@@ -0,0 +1,43 @@
+/*
+ * 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.analysis.hunspell;
+
+/**
+ * An oracle for quickly checking that a specific part of a word can never be a valid word. This
+ * allows speeding up the "Modification" part of {@link Suggester} by avoiding expensive checks on
+ * impossible words. Implementations may use character case, n-grams or whatever they like.
+ *
+ * @see NGramFragmentChecker
+ */
+public interface FragmentChecker {

Review Comment:
   I would mark this as `@FunctionalInterface`



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