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package org.apache.lucene.search.regex;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* Defines basic operations needed by {@link RegexQuery} for a regular
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* expression implementation.
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public interface RegexCapabilities {
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* Called by the constructor of {@link RegexTermEnum} allowing
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* implementations to cache a compiled version of the regular
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* @param pattern regular expression pattern
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void compile(String pattern);
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* @return true if string matches the pattern last passed to {@link #compile}.
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boolean match(String string);
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* A wise prefix implementation can reduce the term enumeration (and thus increase performance)
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* of RegexQuery dramatically!
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* @return static non-regex prefix of the pattern last passed to {@link #compile}. May return null.