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#ifndef QPID_SERIALIZER_H
#define QPID_SERIALIZER_H
/*
*
* 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 <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>
namespace qpid {
namespace serialize {
/** Wrapper to pass serializer functors by reference. */
template <class S> struct SRef {
S& s;
SRef(S& ss) : s(ss) {}
template <class T> typename S::result_type operator()(T& x) { return s(x); }
template <class T> typename S::result_type operator()(const T& x) { return s(x); }
};
template <class S> SRef<S> ref(S& s) { return SRef<S>(s); }
// FIXME aconway 2008-03-03: Document.
// Encoder/Decoder concept: add op() for primitive types, raw(),
// op()(Iter, Iter). Note split, encode, decode.
//
// FIXME aconway 2008-03-09: document - non-intrusive serialzation.
// Default rule calls member. Enums must provide an override rule.
/** Overload for types that do not provide a serialize() member.*/
template <class T> T& serializable(T& t) { return t; }
template <class Derived> class Encoder {
public:
typedef Derived& result_type; // unary functor requirement.
/** Default op() calls serializable() free function */
template <class T>
Derived& operator()(const T& t) {
serializable(const_cast<T&>(t)).serialize(self()); return self();
}
/** Split serialize() into encode()/decode() */
template <class T>
Derived& split(const T& t) { t.encode(self()); return self(); }
private:
Derived& self() { return *static_cast<Derived*>(this); }
};
template <class Derived> class Decoder {
public:
typedef Derived& result_type; // unary functor requirement.
/** Default op() calls serializable() free function */
template <class T>
Derived& operator()(T& t) {
serializable(t).serialize(self()); return self();
}
/** Split serialize() into encode()/decode() */
template <class T>
Derived& split(T& t) { t.decode(self()); return self(); }
private:
Derived& self() { return *static_cast<Derived*>(this); }
};
/** Serialize a type by converting it to/from another type */
template <class Type, class AsType>
struct SerializeAs {
Type& value;
SerializeAs(Type & t) : value(t) {}
template <class S> void serialize(S& s) { s.split(*this); }
template <class S> void encode(S& s) const { s(AsType(value)); }
template <class S> void decode(S& s) { AsType x; s(x); value=x; }
};
}} // namespace qpid::serialize
// FIXME aconway 2008-03-09: rename to serialize.h
//
#endif /*!QPID_SERIALIZER_H*/
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