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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef avro_json_JsonDom_hh__
#define avro_json_JsonDom_hh__
#include <cstdint>
#include <iostream>
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "Config.hh"
#include "boost/any.hpp"
namespace avro {
class AVRO_DECL InputStream;
namespace json {
class Entity;
typedef bool Bool;
typedef int64_t Long;
typedef double Double;
typedef std::string String;
typedef std::vector<Entity> Array;
typedef std::map<std::string, Entity> Object;
class AVRO_DECL JsonParser;
class JsonNullFormatter;
template<typename F = JsonNullFormatter>
class AVRO_DECL JsonGenerator;
enum class EntityType {
Null,
Bool,
Long,
Double,
String,
Arr,
Obj
};
const char *typeToString(EntityType t);
inline std::ostream &operator<<(std::ostream &os, EntityType et) {
return os << typeToString(et);
}
class AVRO_DECL Entity {
EntityType type_;
boost::any value_;
size_t line_; // can't be const else noncopyable...
void ensureType(EntityType) const;
public:
explicit Entity(size_t line = 0) : type_(EntityType::Null), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(Bool v, size_t line = 0) : type_(EntityType::Bool), value_(v), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(Long v, size_t line = 0) : type_(EntityType::Long), value_(v), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(Double v, size_t line = 0) : type_(EntityType::Double), value_(v), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(const std::shared_ptr<String> &v, size_t line = 0) : type_(EntityType::String), value_(v), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(const std::shared_ptr<Array> &v, size_t line = 0) : type_(EntityType::Arr), value_(v), line_(line) {}
// Not explicit because do want implicit conversion
// NOLINTNEXTLINE(google-explicit-constructor)
Entity(const std::shared_ptr<Object> &v, size_t line = 0) : type_(EntityType::Obj), value_(v), line_(line) {}
EntityType type() const { return type_; }
size_t line() const { return line_; }
Bool boolValue() const {
ensureType(EntityType::Bool);
return boost::any_cast<Bool>(value_);
}
Long longValue() const {
ensureType(EntityType::Long);
return boost::any_cast<Long>(value_);
}
Double doubleValue() const {
ensureType(EntityType::Double);
return boost::any_cast<Double>(value_);
}
String stringValue() const;
String bytesValue() const;
const Array &arrayValue() const {
ensureType(EntityType::Arr);
return **boost::any_cast<std::shared_ptr<Array>>(&value_);
}
const Object &objectValue() const {
ensureType(EntityType::Obj);
return **boost::any_cast<std::shared_ptr<Object>>(&value_);
}
std::string toString() const;
};
template<typename T>
struct type_traits {
};
template<>
struct type_traits<bool> {
static EntityType type() { return EntityType::Bool; }
static const char *name() { return "bool"; }
};
template<>
struct type_traits<int64_t> {
static EntityType type() { return EntityType::Long; }
static const char *name() { return "long"; }
};
template<>
struct type_traits<double> {
static EntityType type() { return EntityType::Double; }
static const char *name() { return "double"; }
};
template<>
struct type_traits<std::string> {
static EntityType type() { return EntityType::String; }
static const char *name() { return "string"; }
};
template<>
struct type_traits<std::vector<Entity>> {
static EntityType type() { return EntityType::Arr; }
static const char *name() { return "array"; }
};
template<>
struct type_traits<std::map<std::string, Entity>> {
static EntityType type() { return EntityType::Obj; }
static const char *name() { return "object"; }
};
AVRO_DECL Entity readEntity(JsonParser &p);
AVRO_DECL Entity loadEntity(InputStream &in);
AVRO_DECL Entity loadEntity(const char *text);
AVRO_DECL Entity loadEntity(const uint8_t *text, size_t len);
void writeEntity(JsonGenerator<JsonNullFormatter> &g, const Entity &n);
} // namespace json
} // namespace avro
#endif
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