qpid/framing/StructHelper.h Source File

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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