scalar_base.hpp
#ifndef PROTON_INTERNAL_SCALAR_BASE_HPP
#define PROTON_INTERNAL_SCALAR_BASE_HPP
/*
*
* 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
*
* http://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.
*
*/
#include "../binary.hpp"
#include "../decimal.hpp"
#include "../error.hpp"
#include "./export.hpp"
#include "./comparable.hpp"
#include "./type_traits.hpp"
#include "../symbol.hpp"
#include "../timestamp.hpp"
#include "../type_id.hpp"
#include "../types_fwd.hpp"
#include "../uuid.hpp"
#include <iosfwd>
#include <string>
#include <typeinfo>
namespace proton {
class message;
namespace codec {
class decoder;
class encoder;
}
namespace internal {
class scalar_base;
template<class T> T get(const scalar_base& s);
class scalar_base : private comparable<scalar_base> {
public:
PN_CPP_EXTERN type_id type() const;
// XXX I don't think many folks ever used this stuff. Let's
// remove it. - Yes, try to remove them.
template <class T> void get(T& x) const { get_(x); }
template <class T> T get() const { T x; get_(x); return x; }
friend PN_CPP_EXTERN bool operator<(const scalar_base& x, const scalar_base& y);
friend PN_CPP_EXTERN bool operator==(const scalar_base& x, const scalar_base& y);
friend PN_CPP_EXTERN std::ostream& operator<<(std::ostream& o, const scalar_base& x);
protected:
PN_CPP_EXTERN scalar_base(const pn_atom_t& a);
PN_CPP_EXTERN scalar_base();
PN_CPP_EXTERN scalar_base(const scalar_base&);
PN_CPP_EXTERN scalar_base& operator=(const scalar_base&);
PN_CPP_EXTERN void put_(bool);
PN_CPP_EXTERN void put_(uint8_t);
PN_CPP_EXTERN void put_(int8_t);
PN_CPP_EXTERN void put_(uint16_t);
PN_CPP_EXTERN void put_(int16_t);
PN_CPP_EXTERN void put_(uint32_t);
PN_CPP_EXTERN void put_(int32_t);
PN_CPP_EXTERN void put_(uint64_t);
PN_CPP_EXTERN void put_(int64_t);
PN_CPP_EXTERN void put_(wchar_t);
PN_CPP_EXTERN void put_(float);
PN_CPP_EXTERN void put_(double);
PN_CPP_EXTERN void put_(timestamp);
PN_CPP_EXTERN void put_(const decimal32&);
PN_CPP_EXTERN void put_(const decimal64&);
PN_CPP_EXTERN void put_(const decimal128&);
PN_CPP_EXTERN void put_(const uuid&);
PN_CPP_EXTERN void put_(const std::string&);
PN_CPP_EXTERN void put_(const symbol&);
PN_CPP_EXTERN void put_(const binary&);
PN_CPP_EXTERN void put_(const char* s);
PN_CPP_EXTERN void put_(const null&);
template<class T> void put(const T& x) { putter<T>::put(*this, x); }
private:
PN_CPP_EXTERN void get_(bool&) const;
PN_CPP_EXTERN void get_(uint8_t&) const;
PN_CPP_EXTERN void get_(int8_t&) const;
PN_CPP_EXTERN void get_(uint16_t&) const;
PN_CPP_EXTERN void get_(int16_t&) const;
PN_CPP_EXTERN void get_(uint32_t&) const;
PN_CPP_EXTERN void get_(int32_t&) const;
PN_CPP_EXTERN void get_(uint64_t&) const;
PN_CPP_EXTERN void get_(int64_t&) const;
PN_CPP_EXTERN void get_(wchar_t&) const;
PN_CPP_EXTERN void get_(float&) const;
PN_CPP_EXTERN void get_(double&) const;
PN_CPP_EXTERN void get_(timestamp&) const;
PN_CPP_EXTERN void get_(decimal32&) const;
PN_CPP_EXTERN void get_(decimal64&) const;
PN_CPP_EXTERN void get_(decimal128&) const;
PN_CPP_EXTERN void get_(uuid&) const;
PN_CPP_EXTERN void get_(std::string&) const;
PN_CPP_EXTERN void get_(symbol&) const;
PN_CPP_EXTERN void get_(binary&) const;
PN_CPP_EXTERN void get_(null&) const;
// use template structs, functions cannot be partially specialized.
template <class T, class Enable=void> struct putter {
static void put(scalar_base& s, const T& x) { s.put_(x); }
};
template <class T> struct putter<T, typename enable_if<is_unknown_integer<T>::value>::type> {
static void put(scalar_base& s, const T& x) { s.put_(static_cast<typename known_integer<T>::type>(x)); }
};
template <class T, class Enable=void> struct getter {
static T get(const scalar_base& s) { T x; s.get_(x); return x; }
};
template <class T> struct getter<T, typename enable_if<is_unknown_integer<T>::value>::type> {
static T get(const scalar_base& s) { typename known_integer<T>::type x; s.get_(x); return x; }
};
void ok(pn_type_t) const;
void set(const pn_atom_t&);
void set(const binary& x, pn_type_t t);
pn_atom_t atom_;
binary bytes_; // Hold binary data.
friend class proton::message;
friend class codec::encoder;
friend class codec::decoder;
template<class T> friend T get(const scalar_base& s) { return scalar_base::getter<T>::get(s); }
};
template <class R, class F> R visit(const scalar_base& s, F f) {
switch(s.type()) {
case BOOLEAN: return f(s.get<bool>());
case UBYTE: return f(s.get<uint8_t>());
case BYTE: return f(s.get<int8_t>());
case USHORT: return f(s.get<uint16_t>());
case SHORT: return f(s.get<int16_t>());
case UINT: return f(s.get<uint32_t>());
case INT: return f(s.get<int32_t>());
case CHAR: return f(s.get<wchar_t>());
case ULONG: return f(s.get<uint64_t>());
case LONG: return f(s.get<int64_t>());
case TIMESTAMP: return f(s.get<timestamp>());
case FLOAT: return f(s.get<float>());
case DOUBLE: return f(s.get<double>());
case DECIMAL32: return f(s.get<decimal32>());
case DECIMAL64: return f(s.get<decimal64>());
case DECIMAL128: return f(s.get<decimal128>());
case UUID: return f(s.get<uuid>());
case BINARY: return f(s.get<binary>());
case STRING: return f(s.get<std::string>());
case SYMBOL: return f(s.get<symbol>());
default: throw conversion_error("invalid scalar type "+type_name(s.type()));
}
}
PN_CPP_EXTERN conversion_error make_coercion_error(const char* cpp_type, type_id amqp_type);
template<class T> struct coerce_op {
template <class U>
typename enable_if<is_convertible<U, T>::value, T>::type operator()(const U& x) {
return static_cast<T>(x);
}
template <class U>
typename enable_if<!is_convertible<U, T>::value, T>::type operator()(const U&) {
throw make_coercion_error(typeid(T).name(), type_id_of<U>::value);
}
};
template <class T> T coerce(const scalar_base& s) { return visit<T>(s, coerce_op<T>()); }
} // internal
PN_CPP_EXTERN std::string to_string(const internal::scalar_base& x);
} // proton
#endif // PROTON_INTERNAL_SCALAR_BASE_HPP
proton::UUID
16-byte UUID.
Definition: type_id.hpp:56
proton::message
An AMQP message.
Definition: message.hpp:51
proton::codec::operator<<
encoder & operator<<(encoder &e, const std::deque< T, A > &x)
std::deque<T> for most T is encoded as an amqp::ARRAY (same type elements)
Definition: deque.hpp:34
proton::STRING
Variable-length utf8-encoded string.
Definition: type_id.hpp:58
proton::type_name
std::string type_name(type_id)
Get the name of the AMQP type.
proton::SYMBOL
Variable-length encoded string.
Definition: type_id.hpp:59
proton::TIMESTAMP
Signed 64-bit milliseconds since the epoch.
Definition: type_id.hpp:50
proton::BINARY
Variable-length sequence of bytes.
Definition: type_id.hpp:57
proton::DOUBLE
64-bit binary floating point.
Definition: type_id.hpp:52
proton::DECIMAL32
32-bit decimal floating point.
Definition: type_id.hpp:53
proton::BYTE
Signed 8-bit integer.
Definition: type_id.hpp:42
proton::UBYTE
Unsigned 8-bit integer.
Definition: type_id.hpp:41
proton::LONG
Signed 64-bit integer.
Definition: type_id.hpp:49
proton::BOOLEAN
Boolean true or false.
Definition: type_id.hpp:40
proton::to_string
std::string to_string(const internal::scalar_base &x)
Return a readable string representation of x for display purposes.
proton::type_id
type_id
An identifier for AMQP types.
Definition: type_id.hpp:38
proton::CHAR
32-bit unicode character.
Definition: type_id.hpp:47
proton::UINT
Unsigned 32-bit integer.
Definition: type_id.hpp:45
proton::ULONG
Unsigned 64-bit integer.
Definition: type_id.hpp:48
proton::SHORT
Signed 16-bit integer.
Definition: type_id.hpp:44
proton::INT
Signed 32-bit integer.
Definition: type_id.hpp:46
proton::USHORT
Unsigned 16-bit integer.
Definition: type_id.hpp:43
proton::DECIMAL64
64-bit decimal floating point.
Definition: type_id.hpp:54
proton::DECIMAL128
128-bit decimal floating point.
Definition: type_id.hpp:55
proton
Type traits for mapping between AMQP and C++ types.
Definition: annotation_key.hpp:28
proton::FLOAT
32-bit binary floating point.
Definition: type_id.hpp:51