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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file specifies a recursive data storage class called Value intended for | 5 // This file specifies a recursive data storage class called Value intended for |
6 // storing settings and other persistable data. | 6 // storing settings and other persistable data. |
7 // | 7 // |
8 // A Value represents something that can be stored in JSON or passed to/from | 8 // A Value represents something that can be stored in JSON or passed to/from |
9 // JavaScript. As such, it is NOT a generalized variant type, since only the | 9 // JavaScript. As such, it is NOT a generalized variant type, since only the |
10 // types supported by JavaScript/JSON are supported. | 10 // types supported by JavaScript/JSON are supported. |
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376 // This type of Value represents a list of other Value values. | 376 // This type of Value represents a list of other Value values. |
377 class BASE_EXPORT ListValue : public Value { | 377 class BASE_EXPORT ListValue : public Value { |
378 public: | 378 public: |
379 using const_iterator = ListStorage::const_iterator; | 379 using const_iterator = ListStorage::const_iterator; |
380 using iterator = ListStorage::iterator; | 380 using iterator = ListStorage::iterator; |
381 | 381 |
382 // Returns |value| if it is a list, nullptr otherwise. | 382 // Returns |value| if it is a list, nullptr otherwise. |
383 static std::unique_ptr<ListValue> From(std::unique_ptr<Value> value); | 383 static std::unique_ptr<ListValue> From(std::unique_ptr<Value> value); |
384 | 384 |
385 ListValue(); | 385 ListValue(); |
| 386 explicit ListValue(const ListStorage& in_list); |
| 387 explicit ListValue(ListStorage&& in_list) noexcept; |
386 | 388 |
387 // Clears the contents of this ListValue | 389 // Clears the contents of this ListValue |
388 void Clear(); | 390 void Clear(); |
389 | 391 |
390 // Returns the number of Values in this list. | 392 // Returns the number of Values in this list. |
391 size_t GetSize() const { return list_->size(); } | 393 size_t GetSize() const { return list_->size(); } |
392 | 394 |
393 // Returns the capacity of storage for Values in this list. | 395 // Returns the capacity of storage for Values in this list. |
394 size_t capacity() const { return list_->capacity(); } | 396 size_t capacity() const { return list_->capacity(); } |
395 | 397 |
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423 bool GetInteger(size_t index, int* out_value) const; | 425 bool GetInteger(size_t index, int* out_value) const; |
424 // Values of both type Type::INTEGER and Type::DOUBLE can be obtained as | 426 // Values of both type Type::INTEGER and Type::DOUBLE can be obtained as |
425 // doubles. | 427 // doubles. |
426 bool GetDouble(size_t index, double* out_value) const; | 428 bool GetDouble(size_t index, double* out_value) const; |
427 bool GetString(size_t index, std::string* out_value) const; | 429 bool GetString(size_t index, std::string* out_value) const; |
428 bool GetString(size_t index, string16* out_value) const; | 430 bool GetString(size_t index, string16* out_value) const; |
429 bool GetBinary(size_t index, const Value** out_value) const; | 431 bool GetBinary(size_t index, const Value** out_value) const; |
430 bool GetBinary(size_t index, Value** out_value); | 432 bool GetBinary(size_t index, Value** out_value); |
431 bool GetDictionary(size_t index, const DictionaryValue** out_value) const; | 433 bool GetDictionary(size_t index, const DictionaryValue** out_value) const; |
432 bool GetDictionary(size_t index, DictionaryValue** out_value); | 434 bool GetDictionary(size_t index, DictionaryValue** out_value); |
| 435 |
| 436 using Value::GetList; |
433 bool GetList(size_t index, const ListValue** out_value) const; | 437 bool GetList(size_t index, const ListValue** out_value) const; |
434 bool GetList(size_t index, ListValue** out_value); | 438 bool GetList(size_t index, ListValue** out_value); |
435 | 439 |
436 // Removes the Value with the specified index from this list. | 440 // Removes the Value with the specified index from this list. |
437 // If |out_value| is non-NULL, the removed Value AND ITS OWNERSHIP will be | 441 // If |out_value| is non-NULL, the removed Value AND ITS OWNERSHIP will be |
438 // passed out via |out_value|. If |out_value| is NULL, the removed value will | 442 // passed out via |out_value|. If |out_value| is NULL, the removed value will |
439 // be deleted. This method returns true if |index| is valid; otherwise | 443 // be deleted. This method returns true if |index| is valid; otherwise |
440 // it will return false and the ListValue object will be unchanged. | 444 // it will return false and the ListValue object will be unchanged. |
441 bool Remove(size_t index, std::unique_ptr<Value>* out_value); | 445 bool Remove(size_t index, std::unique_ptr<Value>* out_value); |
442 | 446 |
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534 return out << static_cast<const Value&>(value); | 538 return out << static_cast<const Value&>(value); |
535 } | 539 } |
536 | 540 |
537 // Stream operator so that enum class Types can be used in log statements. | 541 // Stream operator so that enum class Types can be used in log statements. |
538 BASE_EXPORT std::ostream& operator<<(std::ostream& out, | 542 BASE_EXPORT std::ostream& operator<<(std::ostream& out, |
539 const Value::Type& type); | 543 const Value::Type& type); |
540 | 544 |
541 } // namespace base | 545 } // namespace base |
542 | 546 |
543 #endif // BASE_VALUES_H_ | 547 #endif // BASE_VALUES_H_ |
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