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88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/* Copyright (C) 2016
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* swift project Community / Contributors
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*
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* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
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* directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
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* including this file, may be copied, modified, propagated, or distributed except according to the terms
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* contained in the LICENSE file.
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*/
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//! \file
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#ifndef BLACKMISC_JSONEXCEPTION_H
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#define BLACKMISC_JSONEXCEPTION_H
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#include "blackmisc/blackmiscexport.h"
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#include <QString>
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#include <stdexcept>
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namespace BlackMisc
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{
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class CStatusMessage;
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class CLogCategoryList;
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/*!
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* Thrown when a convertFromJson method encounters an unrecoverable error in JSON data.
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*/
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class BLACKMISC_EXPORT CJsonException : public std::runtime_error
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{
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public:
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//! Constructor.
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explicit CJsonException(const QString &message) : std::runtime_error(message.toStdString()) {}
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//! Get a stack trace of where in the JSON object tree the error occurred.
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const QString &getStackTrace() const { return m_stack; }
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//! Get a status message representation.
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CStatusMessage toStatusMessage(const CLogCategoryList &categories, const QString &prefix) const;
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//! Write a message to the log.
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void toLogMessage(const CLogCategoryList &categories, const QString &prefix) const;
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private:
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static QString stackString();
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QString m_stack = stackString();
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};
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/*!
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* Pseudo-RAII pattern that tracks the current JSON value being converted.
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*
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* Will be used to construct a stack trace for CJsonException::getStackTrace.
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* Class is optimized to introduce minimal overhead in the unexceptional case.
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*/
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class BLACKMISC_EXPORT CJsonScope
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{
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public:
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//! Construct a scope with the given name and optional index subscript.
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//! @{
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CJsonScope(const QString &name, int index = -1) noexcept : m_index(index), m_string(&name) { push(); }
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CJsonScope(QLatin1String name, int index = -1) noexcept : m_index(index), m_latin1(name) { push(); }
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template <size_t N> CJsonScope(const char (&name)[N], int index = -1) noexcept : CJsonScope(QLatin1String(name, N), index) {}
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//! @}
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//! QString constructor argument must be an lvalue.
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CJsonScope(const QString &&, int = -1) = delete;
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//! Not copyable.
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//! @{
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CJsonScope(const CJsonScope &) = delete;
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CJsonScope &operator =(const CJsonScope &) = delete;
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//! @}
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//! Destructor.
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~CJsonScope() { pop(); }
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private:
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void push() const noexcept;
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void pop() const noexcept;
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friend class CJsonException;
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int m_index = -1;
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const QString *m_string = nullptr;
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QLatin1String m_latin1;
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};
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}
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#endif
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