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Diffstat (limited to 'cpp/include/qpid/messaging/Variant.h')
| -rw-r--r-- | cpp/include/qpid/messaging/Variant.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/cpp/include/qpid/messaging/Variant.h b/cpp/include/qpid/messaging/Variant.h new file mode 100644 index 0000000000..ac000244c2 --- /dev/null +++ b/cpp/include/qpid/messaging/Variant.h @@ -0,0 +1,167 @@ +#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 client { +} + +namespace messaging { + +/** + * Thrown when an illegal conversion of a variant is attempted. + */ +struct InvalidConversion : public qpid::Exception +{ + InvalidConversion(const std::string& msg); +}; + +enum VariantType { + VOID = 0, + BOOL, + UINT8, + UINT16, + UINT32, + UINT64, + INT8, + INT16, + INT32, + INT64, + FLOAT, + DOUBLE, + STRING, + MAP, + 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 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*/ |