AvroTraits.hh

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00001 /*
00002  * Licensed to the Apache Software Foundation (ASF) under one
00003  * or more contributor license agreements.  See the NOTICE file
00004  * distributed with this work for additional information
00005  * regarding copyright ownership.  The ASF licenses this file
00006  * to you under the Apache License, Version 2.0 (the
00007  * "License"); you may not use this file except in compliance
00008  * with the License.  You may obtain a copy of the License at
00009  *
00010  *     http://www.apache.org/licenses/LICENSE-2.0
00011  *
00012  * Unless required by applicable law or agreed to in writing, software
00013  * distributed under the License is distributed on an "AS IS" BASIS,
00014  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015  * See the License for the specific language governing permissions and
00016  * limitations under the License.
00017  */
00018 
00019 #ifndef avro_AvroTraits_hh__
00020 #define avro_AvroTraits_hh__
00021 
00022 #include "Config.hh"
00023 #include "Boost.hh"
00024 #include "Types.hh"
00025 
00030 
00031 namespace avro {
00032 
00033 template <typename T>
00034 struct is_serializable : public boost::false_type{};
00035 
00036 template <typename T>
00037 struct is_promotable : public boost::false_type{};
00038 
00039 template <typename T>
00040 struct type_to_avro {
00041     static const Type type = AVRO_NUM_TYPES;
00042 };
00043 
00044 #define DEFINE_PRIMITIVE(CTYPE, AVROTYPE) \
00045 template <> \
00046 struct is_serializable<CTYPE> : public boost::true_type{}; \
00047 \
00048 template <> \
00049 struct type_to_avro<CTYPE> { \
00050     static const Type type = AVROTYPE; \
00051 };
00052 
00053 #define DEFINE_PROMOTABLE_PRIMITIVE(CTYPE, AVROTYPE) \
00054 template <> \
00055 struct is_promotable<CTYPE> : public boost::true_type{}; \
00056 \
00057 DEFINE_PRIMITIVE(CTYPE, AVROTYPE)
00058 
00059 DEFINE_PROMOTABLE_PRIMITIVE(int32_t, AVRO_INT)
00060 DEFINE_PROMOTABLE_PRIMITIVE(int64_t, AVRO_LONG)
00061 DEFINE_PROMOTABLE_PRIMITIVE(float, AVRO_FLOAT)
00062 DEFINE_PRIMITIVE(double, AVRO_DOUBLE)
00063 DEFINE_PRIMITIVE(bool, AVRO_BOOL)
00064 DEFINE_PRIMITIVE(Null, AVRO_NULL)
00065 DEFINE_PRIMITIVE(std::string, AVRO_STRING)
00066 DEFINE_PRIMITIVE(std::vector<uint8_t>, AVRO_BYTES)
00067 
00068 
00069 } // namespace avro
00070 
00071 #endif