| // Copyright (C) 2011 The Libphonenumber Authors |
| // |
| // Licensed 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. |
| |
| // Author: Fredrik Roubert |
| |
| // RegExpCache is a simple wrapper around hash_map<> to store RegExp objects. |
| // |
| // To get a cached RegExp object for a regexp pattern string, call the |
| // GetRegExp() method of the class RegExpCache providing the pattern string. If |
| // a RegExp object corresponding to the pattern string doesn't already exist, it |
| // will be created by the GetRegExp() method. |
| // |
| // RegExpCache cache; |
| // const RegExp& regexp = cache.GetRegExp("\d"); |
| |
| #ifndef I18N_PHONENUMBERS_REGEXP_CACHE_H_ |
| #define I18N_PHONENUMBERS_REGEXP_CACHE_H_ |
| |
| #include <cstddef> |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/synchronization/lock.h" |
| |
| #ifdef USE_TR1_UNORDERED_MAP |
| # include <tr1/unordered_map> |
| #else |
| # include <map> |
| #endif |
| |
| namespace i18n { |
| namespace phonenumbers { |
| |
| using std::string; |
| |
| class AbstractRegExpFactory; |
| class RegExp; |
| |
| class RegExpCache { |
| private: |
| #ifdef USE_TR1_UNORDERED_MAP |
| typedef std::tr1::unordered_map<string, const RegExp*> CacheImpl; |
| #else |
| typedef std::map<string, const RegExp*> CacheImpl; |
| #endif |
| |
| public: |
| explicit RegExpCache(const AbstractRegExpFactory& regexp_factory, |
| size_t min_items); |
| ~RegExpCache(); |
| |
| const RegExp& GetRegExp(const string& pattern); |
| |
| private: |
| const AbstractRegExpFactory& regexp_factory_; |
| base::Lock lock_; // protects cache_impl_ |
| scoped_ptr<CacheImpl> cache_impl_; // protected by lock_ |
| friend class RegExpCacheTest_CacheConstructor_Test; |
| DISALLOW_COPY_AND_ASSIGN(RegExpCache); |
| }; |
| |
| } // namespace phonenumbers |
| } // namespace i18n |
| |
| #endif // I18N_PHONENUMBERS_REGEXP_CACHE_H_ |