1// Copyright (C) 2011 The Libphonenumber Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Author: Fredrik Roubert
16
17#include "phonenumbers/regexp_cache.h"
18
19#include <cstddef>
20#include <string>
21#include <utility>
22
23#include "phonenumbers/base/synchronization/lock.h"
24#include "phonenumbers/regexp_adapter.h"
25
26using std::string;
27
28namespace i18n {
29namespace phonenumbers {
30
31RegExpCache::RegExpCache(const AbstractRegExpFactory& regexp_factory,
32                         size_t min_items)
33    : regexp_factory_(regexp_factory),
34#ifdef I18N_PHONENUMBERS_USE_TR1_UNORDERED_MAP
35      cache_impl_(new CacheImpl(min_items))
36#else
37      cache_impl_(new CacheImpl())
38#endif
39{}
40
41RegExpCache::~RegExpCache() {
42  AutoLock l(lock_);
43  for (CacheImpl::const_iterator
44       it = cache_impl_->begin(); it != cache_impl_->end(); ++it) {
45    delete it->second;
46  }
47}
48
49const RegExp& RegExpCache::GetRegExp(const string& pattern) {
50  AutoLock l(lock_);
51  CacheImpl::const_iterator it = cache_impl_->find(pattern);
52  if (it != cache_impl_->end()) return *it->second;
53
54  const RegExp* regexp = regexp_factory_.CreateRegExp(pattern);
55  cache_impl_->insert(make_pair(pattern, regexp));
56  return *regexp;
57}
58
59}  // namespace phonenumbers
60}  // namespace i18n
61