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#ifndef QPID_MESSAGING_VARIANT_H
#define QPID_MESSAGING_VARIANT_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 <list>
#include <map>
#include <ostream>
#include <string>
#include "qpid/Exception.h"
#include "qpid/sys/IntegerTypes.h"
#include "qpid/client/ClientImportExport.h"
namespace qpid {
namespace messaging {
/**
* Thrown when an illegal conversion of a variant is attempted.
*/
struct InvalidConversion : public qpid::Exception
{
InvalidConversion(const std::string& msg);
};
enum VariantType {
VAR_VOID = 0,
VAR_BOOL,
VAR_UINT8,
VAR_UINT16,
VAR_UINT32,
VAR_UINT64,
VAR_INT8,
VAR_INT16,
VAR_INT32,
VAR_INT64,
VAR_FLOAT,
VAR_DOUBLE,
VAR_STRING,
VAR_MAP,
VAR_LIST
};
class VariantImpl;
/**
* Represents a value of variable type.
*/
class Variant
{
public:
typedef std::map<std::string, Variant> Map;
typedef std::list<Variant> List;
QPID_CLIENT_EXTERN Variant();
QPID_CLIENT_EXTERN Variant(bool);
QPID_CLIENT_EXTERN Variant(uint8_t);
QPID_CLIENT_EXTERN Variant(uint16_t);
QPID_CLIENT_EXTERN Variant(uint32_t);
QPID_CLIENT_EXTERN Variant(uint64_t);
QPID_CLIENT_EXTERN Variant(int8_t);
QPID_CLIENT_EXTERN Variant(int16_t);
QPID_CLIENT_EXTERN Variant(int32_t);
QPID_CLIENT_EXTERN Variant(int64_t);
QPID_CLIENT_EXTERN Variant(float);
QPID_CLIENT_EXTERN Variant(double);
QPID_CLIENT_EXTERN Variant(const std::string&);
QPID_CLIENT_EXTERN Variant(const char*);
QPID_CLIENT_EXTERN Variant(const Map&);
QPID_CLIENT_EXTERN Variant(const List&);
QPID_CLIENT_EXTERN Variant(const Variant&);
QPID_CLIENT_EXTERN ~Variant();
QPID_CLIENT_EXTERN VariantType getType() const;
QPID_CLIENT_EXTERN bool isVoid() const;
QPID_CLIENT_EXTERN Variant& operator=(bool);
QPID_CLIENT_EXTERN Variant& operator=(uint8_t);
QPID_CLIENT_EXTERN Variant& operator=(uint16_t);
QPID_CLIENT_EXTERN Variant& operator=(uint32_t);
QPID_CLIENT_EXTERN Variant& operator=(uint64_t);
QPID_CLIENT_EXTERN Variant& operator=(int8_t);
QPID_CLIENT_EXTERN Variant& operator=(int16_t);
QPID_CLIENT_EXTERN Variant& operator=(int32_t);
QPID_CLIENT_EXTERN Variant& operator=(int64_t);
QPID_CLIENT_EXTERN Variant& operator=(float);
QPID_CLIENT_EXTERN Variant& operator=(double);
QPID_CLIENT_EXTERN Variant& operator=(const std::string&);
QPID_CLIENT_EXTERN Variant& operator=(const char*);
QPID_CLIENT_EXTERN Variant& operator=(const Map&);
QPID_CLIENT_EXTERN Variant& operator=(const List&);
QPID_CLIENT_EXTERN Variant& operator=(const Variant&);
QPID_CLIENT_EXTERN bool asBool() const;
QPID_CLIENT_EXTERN uint8_t asUint8() const;
QPID_CLIENT_EXTERN uint16_t asUint16() const;
QPID_CLIENT_EXTERN uint32_t asUint32() const;
QPID_CLIENT_EXTERN uint64_t asUint64() const;
QPID_CLIENT_EXTERN int8_t asInt8() const;
QPID_CLIENT_EXTERN int16_t asInt16() const;
QPID_CLIENT_EXTERN int32_t asInt32() const;
QPID_CLIENT_EXTERN int64_t asInt64() const;
QPID_CLIENT_EXTERN float asFloat() const;
QPID_CLIENT_EXTERN double asDouble() const;
QPID_CLIENT_EXTERN std::string asString() const;
QPID_CLIENT_EXTERN operator bool() const;
QPID_CLIENT_EXTERN operator uint8_t() const;
QPID_CLIENT_EXTERN operator uint16_t() const;
QPID_CLIENT_EXTERN operator uint32_t() const;
QPID_CLIENT_EXTERN operator uint64_t() const;
QPID_CLIENT_EXTERN operator int8_t() const;
QPID_CLIENT_EXTERN operator int16_t() const;
QPID_CLIENT_EXTERN operator int32_t() const;
QPID_CLIENT_EXTERN operator int64_t() const;
QPID_CLIENT_EXTERN operator float() const;
QPID_CLIENT_EXTERN operator double() const;
QPID_CLIENT_EXTERN operator const char*() const;
QPID_CLIENT_EXTERN const Map& asMap() const;
QPID_CLIENT_EXTERN Map& asMap();
QPID_CLIENT_EXTERN const List& asList() const;
QPID_CLIENT_EXTERN List& asList();
/**
* Unlike asString(), getString() will not do any conversions and
* will throw InvalidConversion if the type is not STRING.
*/
QPID_CLIENT_EXTERN const std::string& getString() const;
QPID_CLIENT_EXTERN std::string& getString();
QPID_CLIENT_EXTERN void setEncoding(const std::string&);
QPID_CLIENT_EXTERN const std::string& getEncoding() const;
QPID_CLIENT_EXTERN void reset();
private:
VariantImpl* impl;
};
QPID_CLIENT_EXTERN std::ostream& operator<<(std::ostream& out, const Variant& value);
QPID_CLIENT_EXTERN std::ostream& operator<<(std::ostream& out, const Variant::Map& map);
QPID_CLIENT_EXTERN std::ostream& operator<<(std::ostream& out, const Variant::List& list);
typedef Variant::Map VariantMap;
}} // namespace qpid::messaging
#endif /*!QPID_MESSAGING_VARIANT_H*/
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