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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_JSON_JSON_STRING_VALUE_SERIALIZER_H_
#define BASE_JSON_JSON_STRING_VALUE_SERIALIZER_H_
#include <memory>
#include <string>
#include <string_view>
#include "base/base_export.h"
#include "base/json/json_reader.h"
#include "base/memory/raw_ptr.h"
#include "base/values.h"
// Use this class to work with code that takes `base::ValueSerializer`.
// To just serialize a JSON string, use base/json/json_writer.h instead.
class BASE_EXPORT JSONStringValueSerializer : public base::ValueSerializer {
public:
// |json_string| is the string that will be the destination of the
// serialization. The caller of the constructor retains ownership of the
// string. |json_string| must not be null.
explicit JSONStringValueSerializer(std::string* json_string);
JSONStringValueSerializer(const JSONStringValueSerializer&) = delete;
JSONStringValueSerializer& operator=(const JSONStringValueSerializer&) =
delete;
~JSONStringValueSerializer() override;
// Attempt to serialize the data structure represented by Value into
// JSON. If the return value is true, the result will have been written
// into the string passed into the constructor.
bool Serialize(base::ValueView root) override;
// Equivalent to Serialize(root) except binary values are omitted from the
// output.
bool SerializeAndOmitBinaryValues(base::ValueView root);
void set_pretty_print(bool new_value) { pretty_print_ = new_value; }
bool pretty_print() { return pretty_print_; }
private:
bool SerializeInternal(base::ValueView root, bool omit_binary_values);
// Owned by the caller of the constructor.
raw_ptr<std::string> json_string_;
bool pretty_print_; // If true, serialization will span multiple lines.
};
// Use this class to work with code that takes `base::ValueDeserializer`.
// To just deserialize a JSON string, use base/json/json_reader.h instead.
class BASE_EXPORT JSONStringValueDeserializer : public base::ValueDeserializer {
public:
// This retains a reference to the contents of |json_string|, so the data
// must outlive the JSONStringValueDeserializer. |options| is a bitmask of
// JSONParserOptions.
explicit JSONStringValueDeserializer(
std::string_view json_string,
int options = base::JSON_PARSE_CHROMIUM_EXTENSIONS);
JSONStringValueDeserializer(const JSONStringValueDeserializer&) = delete;
JSONStringValueDeserializer& operator=(const JSONStringValueDeserializer&) =
delete;
~JSONStringValueDeserializer() override;
// Attempts to deserialize |json_string_| into a structure of Value objects.
// If the return value is null, then
// (1) |error_code| will be filled with an integer error code
// (base::ValueDeserializer::kErrorCodeInvalidFormat) if a non-null
// |error_code| was given.
// (2) |error_message| will be filled with a formatted error message,
// including the location of the error (if appropriate), if a non-null
// |error_message| was given.
// The caller takes ownership of the returned value.
std::unique_ptr<base::Value> Deserialize(int* error_code,
std::string* error_message) override;
private:
// Data is owned by the caller of the constructor.
std::string_view json_string_;
const int options_;
};
#endif // BASE_JSON_JSON_STRING_VALUE_SERIALIZER_H_
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