| /* |
| * 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.uima.ruta.cache; |
| |
| import static java.util.regex.Pattern.CASE_INSENSITIVE; |
| import static java.util.regex.Pattern.DOTALL; |
| import static java.util.regex.Pattern.MULTILINE; |
| import static java.util.regex.Pattern.UNICODE_CASE; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| import java.util.regex.Pattern; |
| |
| import com.github.benmanes.caffeine.cache.Caffeine; |
| import com.github.benmanes.caffeine.cache.LoadingCache; |
| |
| /** |
| * Cache and centralize creation of regex patterns in order to reuse them in different language |
| * elements. |
| */ |
| public class RutaPatternCache { |
| |
| private static final LoadingCache<PatternCacheKey, Pattern> CACHE = Caffeine.newBuilder() |
| .expireAfterAccess(6, TimeUnit.HOURS) |
| .expireAfterWrite(12, TimeUnit.HOURS) |
| .maximumSize(10_000) |
| .build(k -> createPattern(k)); |
| |
| /** |
| * |
| * @param patternString |
| * regular expression as a string |
| * @param ignore |
| * whether to compile the pattern with case ignore option activated |
| * @return compiled pattern for the given arguments |
| */ |
| public static Pattern getPattern(String patternString, boolean ignore) { |
| |
| int flags = MULTILINE | DOTALL; |
| |
| if (ignore) { |
| flags |= CASE_INSENSITIVE | UNICODE_CASE; |
| } |
| |
| return CACHE.get(new PatternCacheKey(patternString, flags)); |
| } |
| |
| /** |
| * |
| * @param patternString |
| * regular expression as a string |
| * @param flags |
| * flags controlling the regular expression. |
| * @return compiled pattern for the given arguments |
| */ |
| public static Pattern getPattern(String patternString, int flags) { |
| |
| return CACHE.get(new PatternCacheKey(patternString, flags)); |
| } |
| |
| private static synchronized Pattern createPattern(PatternCacheKey key) { |
| return Pattern.compile(key.getPatternString(), key.getFlags()); |
| } |
| |
| /** |
| * @return an unmodifiable view of the cache map. |
| */ |
| public static Map<PatternCacheKey, Pattern> getCacheMap() { |
| return Collections.unmodifiableMap(CACHE.asMap()); |
| } |
| |
| /** |
| * Invalidate and cleanup cache |
| */ |
| public static void clearCache() { |
| CACHE.invalidateAll(); |
| CACHE.cleanUp(); |
| } |
| |
| } |