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qpid/framing/StructHelper.h
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00001 /*
00002  *
00003  * Licensed to the Apache Software Foundation (ASF) under one
00004  * or more contributor license agreements.  See the NOTICE file
00005  * distributed with this work for additional information
00006  * regarding copyright ownership.  The ASF licenses this file
00007  * to you under the Apache License, Version 2.0 (the
00008  * "License"); you may not use this file except in compliance
00009  * with the License.  You may obtain a copy of the License at
00010  *
00011  *   http://www.apache.org/licenses/LICENSE-2.0
00012  *
00013  * Unless required by applicable law or agreed to in writing,
00014  * software distributed under the License is distributed on an
00015  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
00016  * KIND, either express or implied.  See the License for the
00017  * specific language governing permissions and limitations
00018  * under the License.
00019  *
00020  */
00021 #ifndef _StructHelper_
00022 #define _StructHelper_
00023 
00024 #include "qpid/Exception.h"
00025 #include "qpid/CommonImportExport.h"
00026 #include "qpid/framing/Buffer.h"
00027 
00028 #include <stdlib.h> // For alloca
00029 
00030 namespace qpid {
00031 namespace framing {
00032 
00033 class QPID_COMMON_CLASS_EXTERN StructHelper
00034 {
00035 public:
00036 
00037     template <class T> void encode(const T t, std::string& data) {
00038         uint32_t size = t.bodySize() + 2/*type*/;
00039         data.resize(size);
00040         Buffer wbuffer(const_cast<char*>(data.data()), size);
00041         wbuffer.putShort(T::TYPE);
00042         t.encodeStructBody(wbuffer);
00043     }
00044 
00045     template <class T> void decode(T& t, const std::string& data) {
00046         Buffer rbuffer(const_cast<char*>(data.data()), data.length());
00047         uint16_t type = rbuffer.getShort();
00048         if (type == T::TYPE) {
00049             t.decodeStructBody(rbuffer);
00050         } else {
00051             throw Exception("Type code does not match");
00052         }
00053     }
00054 };
00055 
00056 }}
00057 #endif

Qpid C++ API Reference
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