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// Copyright (c) 2012 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.
#ifndef TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
#define TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
#include <string>
#include <vector>
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
namespace json_schema_compiler {
namespace util {
// Populates the item |out| from the value |from|. These are used by template
// specializations of |Get(Optional)ArrayFromList|.
bool PopulateItem(const base::Value& from, int* out);
bool PopulateItem(const base::Value& from, bool* out);
bool PopulateItem(const base::Value& from, double* out);
bool PopulateItem(const base::Value& from, std::string* out);
bool PopulateItem(const base::Value& from, std::vector<char>* out);
bool PopulateItem(const base::Value& from, linked_ptr<base::Value>* out);
bool PopulateItem(const base::Value& from,
linked_ptr<base::DictionaryValue>* out);
// This template is used for types generated by tools/json_schema_compiler.
template <class T>
bool PopulateItem(const base::Value& from, linked_ptr<T>* out) {
const base::DictionaryValue* dict = nullptr;
if (!from.GetAsDictionary(&dict))
return false;
scoped_ptr<T> obj(new T());
if (!T::Populate(*dict, obj.get()))
return false;
*out = linked_ptr<T>(obj.release());
return true;
}
// Populates |out| with |list|. Returns false if there is no list at the
// specified key or if the list has anything other than |T|.
template <class T>
bool PopulateArrayFromList(const base::ListValue& list, std::vector<T>* out) {
out->clear();
T item;
for (const base::Value* value : list) {
if (!PopulateItem(*value, &item))
return false;
out->push_back(item);
}
return true;
}
// Creates a new vector containing |list| at |out|. Returns
// true on success or if there is nothing at the specified key. Returns false
// if anything other than a list of |T| is at the specified key.
template <class T>
bool PopulateOptionalArrayFromList(const base::ListValue& list,
scoped_ptr<std::vector<T>>* out) {
out->reset(new std::vector<T>());
if (!PopulateArrayFromList(list, out->get())) {
out->reset();
return false;
}
return true;
}
// Appends a Value newly created from |from| to |out|. These used by template
// specializations of |Set(Optional)ArrayToList|.
void AddItemToList(const int from, base::ListValue* out);
void AddItemToList(const bool from, base::ListValue* out);
void AddItemToList(const double from, base::ListValue* out);
void AddItemToList(const std::string& from, base::ListValue* out);
void AddItemToList(const std::vector<char>& from, base::ListValue* out);
void AddItemToList(const linked_ptr<base::Value>& from, base::ListValue* out);
void AddItemToList(const linked_ptr<base::DictionaryValue>& from,
base::ListValue* out);
// This template is used for types generated by tools/json_schema_compiler.
template <class T>
void AddItemToList(const linked_ptr<T>& from, base::ListValue* out) {
out->Append(from->ToValue().release());
}
// Set |out| to the the contents of |from|. Requires PopulateItem to be
// implemented for |T|.
template <class T>
void PopulateListFromArray(const std::vector<T>& from, base::ListValue* out) {
out->Clear();
for (const auto& item : from)
AddItemToList(item, out);
}
// Set |out| to the the contents of |from| if |from| is not null. Requires
// PopulateItem to be implemented for |T|.
template <class T>
void PopulateListFromOptionalArray(const scoped_ptr<std::vector<T>>& from,
base::ListValue* out) {
if (from.get())
PopulateListFromArray(*from, out);
}
template <class T>
scoped_ptr<base::Value> CreateValueFromArray(const std::vector<T>& from) {
base::ListValue* list = new base::ListValue();
PopulateListFromArray(from, list);
return scoped_ptr<base::Value>(list);
}
template <class T>
scoped_ptr<base::Value> CreateValueFromOptionalArray(
const scoped_ptr<std::vector<T>>& from) {
if (from.get())
return CreateValueFromArray(*from);
return scoped_ptr<base::Value>();
}
std::string ValueTypeToString(base::Value::Type type);
} // namespace util
} // namespace json_schema_compiler
#endif // TOOLS_JSON_SCHEMA_COMPILER_UTIL_H__
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