Revert 282726 "Reland "Use upstream libaddressinput in Chrome.""

trunk/src/third_party/libaddressinput/chromium/json.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "third_party/libaddressinput/src/cpp/src/util/json.h"
-
-#include <map>
-#include <utility>
+#include "cpp/src/util/json.h"
 
 #include "base/basictypes.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/stl_util.h"
 #include "base/values.h"
 
 namespace i18n {
 namespace addressinput {
 
 namespace {
 
-// Returns |json| parsed into a JSON dictionary. Sets |parser_error| to true if
-// parsing failed.
-::scoped_ptr<const base::DictionaryValue> Parse(const std::string& json,
-                                                bool* parser_error) {
-  DCHECK(parser_error);
-  ::scoped_ptr<const base::DictionaryValue> result;
+// A base class for Chrome Json objects. JSON gets parsed into a
+// base::DictionaryValue and data is accessed via the Json interface.
+class ChromeJson : public Json {
+ public:
+  virtual bool GetStringValueForKey(const std::string& key, std::string* value)
+      const OVERRIDE;
+  virtual bool GetJsonValueForKey(const std::string& key,
+                                  scoped_ptr<Json>* value) const OVERRIDE;
+ protected:
+  ChromeJson() {}
+  virtual ~ChromeJson() {}
 
-  // |json| is converted to a |c_str()| here because rapidjson and other parts
-  // of the standalone library use char* rather than std::string.
-  ::scoped_ptr<const base::Value> parsed(base::JSONReader::Read(json.c_str()));
-  *parser_error = !parsed || !parsed->IsType(base::Value::TYPE_DICTIONARY);
+  virtual const base::DictionaryValue* GetDict() const = 0;
 
-  if (*parser_error)
-    result.reset(new base::DictionaryValue);
-  else
-    result.reset(static_cast<const base::DictionaryValue*>(parsed.release()));
+  DISALLOW_COPY_AND_ASSIGN(ChromeJson);
+};
 
-  return result.Pass();
+// A Json object that will parse a string and own the parsed data.
+class JsonDataOwner : public ChromeJson {
+ public:
+  JsonDataOwner() {}
+  virtual ~JsonDataOwner() {}
+
+  virtual bool ParseObject(const std::string& json) OVERRIDE {
+    dict_.reset();
+
+    // |json| is converted to a |c_str()| here because rapidjson and other parts
+    // of the standalone library use char* rather than std::string.
+    scoped_ptr<base::Value> parsed(base::JSONReader::Read(json.c_str()));
+    if (parsed && parsed->IsType(base::Value::TYPE_DICTIONARY))
+      dict_.reset(static_cast<base::DictionaryValue*>(parsed.release()));
+
+    return !!dict_;
+  }
+
+ protected:
+  virtual const base::DictionaryValue* GetDict() const OVERRIDE {
+    return dict_.get();
+  }
+
+ private:
+  scoped_ptr<base::DictionaryValue> dict_;
+
+  DISALLOW_COPY_AND_ASSIGN(JsonDataOwner);
+};
+
+// A Json object which will point to data that's been parsed by a different
+// ChromeJson. It does not own its data and is only valid as long as its parent
+// ChromeJson is valid.
+class JsonDataCopy : public ChromeJson {
+ public:
+  explicit JsonDataCopy(const base::DictionaryValue* dict) :
+      dict_(dict) {}
+  virtual ~JsonDataCopy() {}
+
+  virtual bool ParseObject(const std::string& json) OVERRIDE {
+    NOTREACHED();
+    return false;
+  }
+
+ protected:
+  virtual const base::DictionaryValue* GetDict() const OVERRIDE {
+    return dict_;
+  }
+
+ private:
+  const base::DictionaryValue* dict_;  // weak reference.
+
+  DISALLOW_COPY_AND_ASSIGN(JsonDataCopy);
+};
+
+// ChromeJson ------------------------------------------------------------------
+
+bool ChromeJson::GetStringValueForKey(const std::string& key,
+                                      std::string* value) const {
+  return GetDict()->GetStringWithoutPathExpansion(key, value);
 }
 
-// Returns the list of keys in |dict|.
-std::vector<std::string> GetKeysFromDictionary(
-    const base::DictionaryValue& dict) {
-  std::vector<std::string> keys;
-  for (base::DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance())
-    keys.push_back(it.key());
-  return keys;
+bool ChromeJson::GetJsonValueForKey(const std::string& key,
+                                    scoped_ptr<Json>* value) const {
+  const base::DictionaryValue* sub_dict = NULL;
+  if (!GetDict()->GetDictionaryWithoutPathExpansion(key, &sub_dict) ||
+      !sub_dict) {
+    return false;
+  }
+
+  if (value)
+    value->reset(new JsonDataCopy(sub_dict));
+
+  return true;
 }
 
 }  // namespace
 
-// Implementation of JSON parser for libaddressinput using JSON parser in
-// Chrome.
-class Json::JsonImpl {
- public:
-  explicit JsonImpl(const std::string& json)
-      : owned_(Parse(json, &parser_error_)),
-        dict_(*owned_),
-        keys_(GetKeysFromDictionary(dict_)) {}
+Json::~Json() {}
 
-  ~JsonImpl() { STLDeleteValues(&sub_dicts_); }
-
-  bool parser_error() const { return parser_error_; }
-
-  const std::vector<std::string>& keys() const { return keys_; }
-
-  bool GetStringValueForKey(const std::string& key, std::string* value) const {
-    return dict_.GetStringWithoutPathExpansion(key, value);
-  }
-
-  bool HasDictionaryValueForKey(const std::string& key) {
-    return !!FindDictionary(key);
-  }
-
-  const Json& GetDictionaryValueForKey(const std::string& key) {
-    const Json* result = FindDictionary(key);
-    DCHECK(result);
-    return *result;
-  }
-
- private:
-  explicit JsonImpl(const base::DictionaryValue& dict)
-      : parser_error_(false), dict_(dict), keys_(GetKeysFromDictionary(dict)) {}
-
-  // The caller does not own the returned value, which can be NULL if there's no
-  // dictionary for |key|.
-  const Json* FindDictionary(const std::string& key) {
-    std::map<std::string, Json*>::const_iterator it = sub_dicts_.find(key);
-    if (it != sub_dicts_.end())
-      return it->second;
-
-    const base::DictionaryValue* sub_dict = NULL;
-    if (!dict_.GetDictionaryWithoutPathExpansion(key, &sub_dict) || !sub_dict)
-      return NULL;
-
-    std::pair<std::map<std::string, Json*>::iterator, bool> result =
-        sub_dicts_.insert(std::make_pair(key, new Json));
-    DCHECK(result.second);
-
-    Json* sub_json = result.first->second;
-    sub_json->impl_.reset(new JsonImpl(*sub_dict));
-
-    return sub_json;
-  }
-
-  const ::scoped_ptr<const base::DictionaryValue> owned_;
-  bool parser_error_;
-  const base::DictionaryValue& dict_;
-  const std::vector<std::string> keys_;
-  std::map<std::string, Json*> sub_dicts_;
-
-  DISALLOW_COPY_AND_ASSIGN(JsonImpl);
-};
+// static
+scoped_ptr<Json> Json::Build() {
+  return scoped_ptr<Json>(new JsonDataOwner);
+}
 
 Json::Json() {}
 
-Json::~Json() {}
-
-bool Json::ParseObject(const std::string& json) {
-  DCHECK(!impl_);
-  impl_.reset(new JsonImpl(json));
-  if (impl_->parser_error())
-    impl_.reset();
-  return !!impl_;
-}
-
-const std::vector<std::string>& Json::GetKeys() const {
-  return impl_->keys();
-}
-
-bool Json::GetStringValueForKey(const std::string& key,
-                                std::string* value) const {
-  return impl_->GetStringValueForKey(key, value);
-}
-
-bool Json::HasDictionaryValueForKey(const std::string& key) const {
-  return impl_->HasDictionaryValueForKey(key);
-}
-
-const Json& Json::GetDictionaryValueForKey(const std::string& key) const {
-  return impl_->GetDictionaryValueForKey(key);
-}
-
 }  // namespace addressinput
 }  // namespace i18n