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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 <iostream>
#include <stdint.h>
#include <map>
#include <string>
#include <vector>
#include <memory>
#include "boost/any.hpp"
#include "Config.hh"
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 EntityType {
etNull,
etBool,
etLong,
etDouble,
etString,
etArray,
etObject
};
const char* typeToString(EntityType t);
class AVRO_DECL Entity {
EntityType type_;
boost::any value_;
size_t line_; // can't be const else noncopyable...
void ensureType(EntityType) const;
public:
Entity(size_t line = 0) : type_(etNull), line_(line) { }
Entity(Bool v, size_t line = 0) : type_(etBool), value_(v), line_(line) { }
Entity(Long v, size_t line = 0) : type_(etLong), value_(v), line_(line) { }
Entity(Double v, size_t line = 0) : type_(etDouble), value_(v), line_(line) { }
Entity(const std::shared_ptr<String>& v, size_t line = 0) : type_(etString), value_(v), line_(line) { }
Entity(const std::shared_ptr<Array>& v, size_t line = 0) : type_(etArray), value_(v), line_(line) { }
Entity(const std::shared_ptr<Object>& v, size_t line = 0) : type_(etObject), value_(v), line_(line) { }
EntityType type() const { return type_; }
size_t line() const { return line_; }
Bool boolValue() const {
ensureType(etBool);
return boost::any_cast<Bool>(value_);
}
Long longValue() const {
ensureType(etLong);
return boost::any_cast<Long>(value_);
}
Double doubleValue() const {
ensureType(etDouble);
return boost::any_cast<Double>(value_);
}
String stringValue() const;
String bytesValue() const;
const Array& arrayValue() const {
ensureType(etArray);
return **boost::any_cast<std::shared_ptr<Array> >(&value_);
}
const Object& objectValue() const {
ensureType(etObject);
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 etBool; }
static const char* name() { return "bool"; }
};
template <> struct type_traits<int64_t> {
static EntityType type() { return etLong; }
static const char* name() { return "long"; }
};
template <> struct type_traits<double> {
static EntityType type() { return etDouble; }
static const char* name() { return "double"; }
};
template <> struct type_traits<std::string> {
static EntityType type() { return etString; }
static const char* name() { return "string"; }
};
template <> struct type_traits<std::vector<Entity> > {
static EntityType type() { return etArray; }
static const char* name() { return "array"; }
};
template <> struct type_traits<std::map<std::string, Entity> > {
static EntityType type() { return etObject; }
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);
}
}
#endif
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