| /******************************************************************************* |
| * 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.ofbiz.base.util; |
| |
| import org.apache.oro.text.regex.MalformedPatternException; |
| import org.apache.oro.text.regex.Pattern; |
| import org.apache.oro.text.regex.Perl5Compiler; |
| import org.ofbiz.base.util.cache.OFBizCache; |
| import org.ofbiz.base.util.cache.UtilCache; |
| |
| /** |
| * A RegEx compiled pattern factory. |
| * |
| */ |
| public class PatternFactory { |
| |
| public static final String module = PatternFactory.class.getName(); |
| private static final OFBizCache<String, Pattern> compiledPerl5Patterns = UtilCache.createUtilCache("regularExpression.compiledPerl5Patterns", false); |
| |
| /** |
| * Compiles and caches a Perl5 regexp pattern for the given string pattern. |
| * This would be of no benefits (and may bloat memory usage) if stringPattern is never the same. |
| * @param stringPattern a Perl5 pattern string |
| * @param caseSensitive case sensitive true/false |
| * @return a <code>Pattern</code> instance for the given string pattern |
| * @throws MalformedPatternException |
| */ |
| |
| public static Pattern createOrGetPerl5CompiledPattern(String stringPattern, boolean caseSensitive) throws MalformedPatternException { |
| Pattern pattern = compiledPerl5Patterns.get(stringPattern); |
| if (pattern == null) { |
| Perl5Compiler compiler = new Perl5Compiler(); |
| if (caseSensitive) { |
| pattern = compiler.compile(stringPattern, Perl5Compiler.READ_ONLY_MASK); // READ_ONLY_MASK guarantees immutability |
| } else { |
| pattern = compiler.compile(stringPattern, Perl5Compiler.CASE_INSENSITIVE_MASK | Perl5Compiler.READ_ONLY_MASK); |
| } |
| pattern = compiledPerl5Patterns.putIfAbsentAndGet(stringPattern, pattern); |
| if (Debug.verboseOn()) { |
| Debug.logVerbose("Compiled and cached the pattern: '" + stringPattern, module); |
| } |
| } |
| return pattern; |
| } |
| } |