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/*
*
* 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.
*
*/
#ifndef _TypedResult_
#define _TypedResult_
#include "qpid/client/Completion.h"
#include "qpid/framing/StructHelper.h"
namespace qpid {
namespace client {
/**
* Returned by asynchronous commands that return a result.
* You can use get() to wait for completion and get the result value.
* \ingroup clientapi
*/
template <class T> class TypedResult : public Completion
{
T result;
bool decoded;
public:
///@internal
TypedResult(const Completion& c) : Completion(c), decoded(false) {}
/**
* Wait for the asynchronous command that returned this TypedResult to complete
* and return its result.
*
*@return The result returned by the command.
*@exception If the command returns an error, get() throws an exception.
*
*/
T& get() {
if (!decoded) {
framing::StructHelper helper;
helper.decode(result, getResult());
decoded = true;
}
return result;
}
};
}}
#endif
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