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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_COMMON_JSON_VALUE_SERIALIZER_H__
#define CHROME_COMMON_JSON_VALUE_SERIALIZER_H__
#include <string>
#include "base/basictypes.h"
#include "base/values.h"
class JSONStringValueSerializer : public ValueSerializer {
public:
// json_string is the string that will be source of the deserialization
// or the destination of the serialization. The caller of the constructor
// retains ownership of the string.
JSONStringValueSerializer(std::string* json_string)
: json_string_(json_string),
initialized_with_const_string_(false),
pretty_print_(false),
allow_trailing_comma_(false) {
}
// This version allows initialization with a const string reference for
// deserialization only.
JSONStringValueSerializer(const std::string& json_string)
: json_string_(&const_cast<std::string&>(json_string)),
initialized_with_const_string_(true),
allow_trailing_comma_(false) {
}
~JSONStringValueSerializer();
// 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(const Value& root);
// Attempt to deserialize the data structure encoded in the string passed
// in to the constructor into a structure of Value objects. If the return
// value is true, the |root| parameter will be set to point to a new Value
// object that corresponds to the values represented in the string. The
// caller takes ownership of the returned Value objects.
bool Deserialize(Value** root);
void set_pretty_print(bool new_value) { pretty_print_ = new_value; }
bool pretty_print() { return pretty_print_; }
bool set_allow_trailing_comma(bool new_value) {
allow_trailing_comma_ = new_value;
}
private:
std::string* json_string_;
bool initialized_with_const_string_;
bool pretty_print_; // If true, serialization will span multiple lines.
// If true, deserialization will allow trailing commas.
bool allow_trailing_comma_;
DISALLOW_EVIL_CONSTRUCTORS(JSONStringValueSerializer);
};
class JSONFileValueSerializer : public ValueSerializer {
public:
// json_file_patch is the path of a file that will be source of the
// deserialization or the destination of the serialization.
// When deserializing, the file should exist, but when serializing, the
// serializer will attempt to create the file at the specified location.
JSONFileValueSerializer(const std::wstring& json_file_path)
: json_file_path_(json_file_path) {}
~JSONFileValueSerializer() {}
// DO NOT USE except in unit tests to verify the file was written properly.
// We should never serialize directly to a file since this will block the
// thread. Instead, serialize to a string and write to the file you want on
// the file thread.
//
// 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 file whose name was passed into the constructor.
bool Serialize(const Value& root);
// Attempt to deserialize the data structure encoded in the file passed
// in to the constructor into a structure of Value objects. If the return
// value is true, the |root| parameter will be set to point to a new Value
// object that corresponds to the values represented in the file. The
// caller takes ownership of the returned Value objects.
bool Deserialize(Value** root);
private:
std::wstring json_file_path_;
DISALLOW_EVIL_CONSTRUCTORS(JSONFileValueSerializer);
};
#endif // CHROME_COMMON_JSON_VALUE_SERIALIZER_H__
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