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77 lines
2.2 KiB
77 lines
2.2 KiB
// Copyright (C) 2011 The Libphonenumber Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// Author: Fredrik Roubert
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// RegExpCache is a simple wrapper around hash_map<> to store RegExp objects.
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//
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// To get a cached RegExp object for a regexp pattern string, call the
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// GetRegExp() method of the class RegExpCache providing the pattern string. If
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// a RegExp object corresponding to the pattern string doesn't already exist, it
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// will be created by the GetRegExp() method.
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//
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// RegExpCache cache;
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// const RegExp& regexp = cache.GetRegExp("\d");
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#ifndef I18N_PHONENUMBERS_REGEXP_CACHE_H_
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#define I18N_PHONENUMBERS_REGEXP_CACHE_H_
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#include <cstddef>
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#include <string>
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#include "phonenumbers/base/basictypes.h"
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#include "phonenumbers/base/memory/scoped_ptr.h"
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#include "phonenumbers/base/synchronization/lock.h"
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#ifdef I18N_PHONENUMBERS_USE_TR1_UNORDERED_MAP
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# include <tr1/unordered_map>
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#else
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# include <map>
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#endif
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namespace i18n {
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namespace phonenumbers {
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using std::string;
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class AbstractRegExpFactory;
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class RegExp;
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class RegExpCache {
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private:
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#ifdef I18N_PHONENUMBERS_USE_TR1_UNORDERED_MAP
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typedef std::tr1::unordered_map<string, const RegExp*> CacheImpl;
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#else
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typedef std::map<string, const RegExp*> CacheImpl;
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#endif
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public:
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explicit RegExpCache(const AbstractRegExpFactory& regexp_factory,
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size_t min_items);
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~RegExpCache();
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const RegExp& GetRegExp(const string& pattern);
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private:
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const AbstractRegExpFactory& regexp_factory_;
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Lock lock_; // protects cache_impl_
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scoped_ptr<CacheImpl> cache_impl_; // protected by lock_
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friend class RegExpCacheTest_CacheConstructor_Test;
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DISALLOW_COPY_AND_ASSIGN(RegExpCache);
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};
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} // namespace phonenumbers
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} // namespace i18n
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#endif // I18N_PHONENUMBERS_REGEXP_CACHE_H_
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