JSONRPCResponse.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
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#ifndef _MIRA_JSONRPCRESPONSE_H_
#define _MIRA_JSONRPCRESPONSE_H_

#include <json/JSON.h>
#include <rpc/RPCError.h>

namespace mira {


class JSONRPCResponse
{
public:
    JSONRPCResponse() {}
    JSONRPCResponse(const json::Value& iResponse) :
        response(iResponse) {}

    json::Value getResult() const
    {
        auto it = response.get_obj().find("error");
        if(it!=response.get_obj().end()) {
            auto& obj = it->second;
            auto messageit = obj.get_obj().find("message");
            if(messageit==obj.get_obj().end()) {
                MIRA_THROW(XRPC, "RPC client response has no correct error format: message missing");
            }
            auto stackit = obj.get_obj().find("callstack");
            // if there is no callstack, throw with local callstack info
            if(stackit==obj.get_obj().end())
                MIRA_THROW(XRPC, messageit->second.get_str());

            auto threadit = obj.get_obj().find("thread");
            if(threadit==obj.get_obj().end())
                MIRA_THROW(XRPC, "RPC client response has no correct error format: callstack without thread id");

            CallStack stack;
            ThreadID thread;

            try {
                JSONDeserializer js(stackit->second);
                js.deserialize(stack);
            }
            catch(XIO&) {
                MIRA_THROW(XRPC, "RPC client response has no correct error format: callstack unreadable");
            }

            try {
                thread = threadit->second.get_uint64();
            }
            catch(std::runtime_error&) {
                MIRA_THROW(XRPC, "RPC client response has no correct error format: thread id unreadable");
            }

            XRPC ex(messageit->second.get_str());
            ex.addExternalStackInfo<XRPC>(stack, thread);

            // try to deserialize and add the original exception
            auto excit = obj.get_obj().find("exception");
            if(excit!=obj.get_obj().end()) {
                try {
                    SerializableException* origEx;
                    JSONDeserializer js(excit->second);
                    js.deserialize(origEx);
                    ex.setOrigException(origEx);
                }
                catch(...) {} // ignore errors, it could e.g. be an unknown exception type
            }

            throw ex;
        }

        it = response.get_obj().find("result");
        if(it==response.get_obj().end()) {
            MIRA_THROW(XRPC, "RPC client response has no correct result format");
        }
        return it->second;
    }

    json::Value response;   
};


}

#endif