/usr/share/cruisecontrol-bin-2.6.1/projects/qpid-trunk/cpp/src/qpid/framing/StructHelper.h

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 "Buffer.h"
00026 
00027 #include <stdlib.h> // For alloca
00028 
00029 namespace qpid {
00030 namespace framing {
00031 
00032 class StructHelper
00033 {
00034 public:
00035 
00036     template <class T> void encode(const T t, std::string& data) {
00037         uint32_t size = t.size() + 2/*type*/;
00038         data.resize(size);
00039         Buffer wbuffer(const_cast<char*>(data.data()), size);
00040         wbuffer.putShort(T::TYPE);
00041         t.encodeStructBody(wbuffer);
00042     }
00043 
00044     template <class T> void decode(T& t, const std::string& data) {
00045         Buffer rbuffer(const_cast<char*>(data.data()), data.length());
00046         uint16_t type = rbuffer.getShort();
00047         if (type == T::TYPE) {
00048             t.decodeStructBody(rbuffer);
00049         } else {
00050             throw Exception("Type code does not match");
00051         }
00052     }
00053 };
00054 
00055 }}
00056 #endif  

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