/src/gdal/port/cpl_json.h

Source
/******************************************************************************
 * Project:  Common Portability Library
 * Purpose:  Function wrapper for libjson-c access.
 * Author:   Dmitry Baryshnikov, dmitry.baryshnikov@nextgis.com
 *
 ******************************************************************************
 * Copyright (c) 2017-2018 NextGIS, <info@nextgis.com>
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/

#ifndef CPL_JSON_H_INCLUDED
#define CPL_JSON_H_INCLUDED

#include "cpl_progress.h"
#include "cpl_string.h"

#include <cstdint>
#include <initializer_list>
#include <iterator>
#include <string>
#if __cplusplus >= 201703L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
#include <string_view>
#endif
#include <vector>

/**
 * \file cpl_json.h
 *
 * Interface for read and write JSON documents
 */

/*! @cond Doxygen_Suppress */
typedef void *JSONObjectH;

class CPLJSONObject;
class CPLJSONArray;

class CPLJSONObjectProxy
{
    CPLJSONObject &oObj;
    const std::string osName;

  public:
    explicit inline CPLJSONObjectProxy(CPLJSONObject &oObjIn,
                                       const std::string &osNameIn)
        : oObj(oObjIn), osName(osNameIn)
    {
    }

    template <class T> inline CPLJSONObjectProxy &operator=(const T &val);
};

/*! @endcond */

/**
 * @brief The CPLJSONArray class holds JSON object from CPLJSONDocument
 */
class CPL_DLL CPLJSONObject
{
    friend class CPLJSONArray;
    friend class CPLJSONDocument;

  public:
    /**
     * Json object types
     */
    enum class Type
    {
        Unknown,
        Null,
        Object,
        Array,
        Boolean,
        String,
        Integer,
        Long,
        Double
    };

    /**
     * Json object format to string options
     */
    enum class PrettyFormat
    {
        Plain,   ///< No extra whitespace or formatting applied
        Spaced,  ///< Minimal whitespace inserted
        Pretty   ///< Formatted output
    };

  public:
    /*! @cond Doxygen_Suppress */
    CPLJSONObject();
    explicit CPLJSONObject(const std::string &osName,
                           const CPLJSONObject &oParent);
    explicit CPLJSONObject(std::nullptr_t);
    explicit CPLJSONObject(const std::string &osVal);
    explicit CPLJSONObject(const char *pszValue);
    explicit CPLJSONObject(bool bVal);
    explicit CPLJSONObject(int nVal);
    explicit CPLJSONObject(int64_t nVal);
    explicit CPLJSONObject(uint64_t nVal);
    explicit CPLJSONObject(double dfVal);
    ~CPLJSONObject();
    CPLJSONObject(const CPLJSONObject &other);
    CPLJSONObject(CPLJSONObject &&other);
    CPLJSONObject &operator=(const CPLJSONObject &other);
    CPLJSONObject &operator=(CPLJSONObject &&other);
    CPLJSONObject &operator=(CPLJSONArray &&other);

    // This method is not thread-safe
    CPLJSONObject Clone() const;

  private:
    explicit CPLJSONObject(const std::string &osName, JSONObjectH poJsonObject);
    /*! @endcond */

  public:
    // setters
    void Add(const std::string &osName, const std::string &osValue);
#if defined(DOXYGEN_SKIP) || __cplusplus >= 201703L ||                         \
    (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)

    void Add(const std::string &osName, std::string_view svValue);
#endif
    void Add(const std::string &osName, const char *pszValue);
    void Add(const std::string &osName, double dfValue);
    void Add(const std::string &osName, int nValue);
    void Add(const std::string &osName, GInt64 nValue);
    void Add(const std::string &osName, uint64_t nValue);
    void Add(const std::string &osName, const CPLJSONArray &oValue);
    void Add(const std::string &osName, const CPLJSONObject &oValue);
    void AddNoSplitName(const std::string &osName, const CPLJSONObject &oValue);
    void Add(const std::string &osName, bool bValue);
    void AddNull(const std::string &osName);

    /** Change value by key */
    template <class T> void Set(const std::string &osName, const T &val)
    {
        Delete(osName);
        Add(osName, val);
    }

    void SetNull(const std::string &osName);

    CPLJSONObject operator[](const std::string &osName);

/*! @cond Doxygen_Suppress */

// GCC 9.4 seems to be confused by the template and doesn't realize it
// returns *this
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#endif
    template <class T> inline CPLJSONObject &operator=(const T &val)
    {
        CPLAssert(!m_osKeyForSet.empty());
        std::string osKeyForSet = m_osKeyForSet;
        m_osKeyForSet.clear();
        Set(osKeyForSet, val);
        return *this;
    }
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif

    template <class T>
    inline CPLJSONObject &operator=(std::initializer_list<T> list);

    JSONObjectH GetInternalHandle() const
    {
        return m_poJsonObject;
    }

    /*! @endcond */

    // getters
    std::string GetString(const std::string &osName,
                          const std::string &osDefault = "") const;
    double GetDouble(const std::string &osName, double dfDefault = 0.0) const;
    int GetInteger(const std::string &osName, int nDefault = 0) const;
    GInt64 GetLong(const std::string &osName, GInt64 nDefault = 0) const;
    bool GetBool(const std::string &osName, bool bDefault = false) const;
    std::string ToString(const std::string &osDefault = "") const;
    double ToDouble(double dfDefault = 0.0) const;
    int ToInteger(int nDefault = 0) const;
    GInt64 ToLong(GInt64 nDefault = 0) const;
    bool ToBool(bool bDefault = false) const;
    CPLJSONArray ToArray() const;
    std::string Format(PrettyFormat eFormat) const;

    //
    void Delete(const std::string &osName);
    void DeleteNoSplitName(const std::string &osName);
    CPLJSONArray GetArray(const std::string &osName) const;
    CPLJSONObject GetObj(const std::string &osName) const;
    CPLJSONObject operator[](const std::string &osName) const;
    Type GetType() const;

    /*! @cond Doxygen_Suppress */
    std::string GetName() const
    {
        return m_osKey;
    }

    /*! @endcond */

    std::vector<CPLJSONObject> GetChildren() const;
    bool IsValid() const;
    void Deinit();

  protected:
    /*! @cond Doxygen_Suppress */
    CPLJSONObject GetObjectByPath(const std::string &osPath,
                                  std::string &osName) const;
    /*! @endcond */

  private:
    JSONObjectH m_poJsonObject = nullptr;
    std::string m_osKey{};
    std::string m_osKeyForSet{};
};

/**
 * @brief The JSONArray class JSON array from JSONDocument
 */
class CPL_DLL CPLJSONArray : public CPLJSONObject
{
    friend class CPLJSONObject;
    friend class CPLJSONDocument;

  public:
    /*! @cond Doxygen_Suppress */
    CPLJSONArray();
    explicit CPLJSONArray(const std::string &osName);
    explicit CPLJSONArray(const CPLJSONObject &other);

    /** Constructor from a list of initial values */
    template <class T> static CPLJSONArray Build(std::initializer_list<T> list)
    {
        CPLJSONArray oArray;
        for (const auto &val : list)
            oArray.Add(val);
        return oArray;
    }

  private:
    explicit CPLJSONArray(const std::string &osName, JSONObjectH poJsonObject);

    class CPL_DLL ConstIterator
    {
        const CPLJSONArray &m_oSelf;
        int m_nIdx;
        mutable CPLJSONObject m_oObj{};

      public:
        using iterator_category = std::input_iterator_tag;
        using value_type = CPLJSONObject;
        using difference_type = std::ptrdiff_t;
        using pointer = CPLJSONObject *;
        using reference = CPLJSONObject &;

        ConstIterator(const CPLJSONArray &oSelf, bool bStart)
            : m_oSelf(oSelf), m_nIdx(bStart ? 0 : oSelf.Size())
        {
        }

        ConstIterator(const ConstIterator &) = default;

        ConstIterator &operator=(const ConstIterator &other)
        {
            if (this != &other)
            {
                CPLAssert(&m_oSelf == &(other.m_oSelf));
                m_nIdx = other.m_nIdx;
                m_oObj = other.m_oObj;
            }
            return *this;
        }

        ~ConstIterator() = default;

        CPLJSONObject &operator*() const
        {
            m_oObj = m_oSelf[m_nIdx];
            return m_oObj;
        }

        ConstIterator &operator++()
        {
            m_nIdx++;
            return *this;
        }

        bool operator==(const ConstIterator &it) const
        {
            return m_nIdx == it.m_nIdx;
        }

        bool operator!=(const ConstIterator &it) const
        {
            return m_nIdx != it.m_nIdx;
        }
    };

    /*! @endcond */
  public:
    int Size() const;

    //! Return the size of the array
    inline size_t size() const
    {
        return static_cast<size_t>(Size());
    }

    void AddNull();
    void Add(const CPLJSONObject &oValue);
    void Add(const std::string &osValue);
#if defined(DOXYGEN_SKIP) || __cplusplus >= 201703L ||                         \
    (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)

    void Add(std::string_view svValue);
#endif
    void Add(const char *pszValue);
    void Add(double dfValue);
    void Add(int nValue);
    void Add(GInt64 nValue);
    void Add(uint64_t nValue);
    void Add(bool bValue);

    CPLJSONObject operator[](int nIndex);
    const CPLJSONObject operator[](int nIndex) const;

    CPLJSONObject operator[](size_t nIndex);
    const CPLJSONObject operator[](size_t nIndex) const;

    /** Iterator to first element */
    ConstIterator begin() const
    {
        return ConstIterator(*this, true);
    }

    /** Iterator to after last element */
    ConstIterator end() const
    {
        return ConstIterator(*this, false);
    }
};

/**
 * @brief The CPLJSONDocument class Wrapper class around json-c library
 */
class CPL_DLL CPLJSONDocument
{
  public:
    /*! @cond Doxygen_Suppress */
    CPLJSONDocument();
    ~CPLJSONDocument();
    CPLJSONDocument(const CPLJSONDocument &other);
    CPLJSONDocument &operator=(const CPLJSONDocument &other);
    CPLJSONDocument(CPLJSONDocument &&other);
    CPLJSONDocument &operator=(CPLJSONDocument &&other);
    /*! @endcond */

    bool Save(const std::string &osPath) const;
    std::string SaveAsString() const;

    CPLJSONObject GetRoot();
    const CPLJSONObject GetRoot() const;
    void SetRoot(const CPLJSONObject &oRoot);
    bool Load(const std::string &osPath);
    bool LoadMemory(const std::string &osStr);
    bool LoadMemory(const GByte *pabyData, int nLength = -1);
    bool LoadChunks(const std::string &osPath, size_t nChunkSize = 16384,
                    GDALProgressFunc pfnProgress = nullptr,
                    void *pProgressArg = nullptr);
    bool LoadUrl(const std::string &osUrl, const char *const *papszOptions,
                 GDALProgressFunc pfnProgress = nullptr,
                 void *pProgressArg = nullptr);

  private:
    mutable JSONObjectH m_poRootJsonObject;
};

/*! @cond Doxygen_Suppress */
template <class T>
inline CPLJSONObject &CPLJSONObject::operator=(std::initializer_list<T> list)
{
    return operator=(CPLJSONArray::Build(list));
}

/*! @endcond */

CPLStringList CPLParseKeyValueJson(const char *pszJson);

#endif  // CPL_JSON_H_INCLUDED

Coverage Report

Created: 2026-04-01 06:20

Line	Count	Source
1		/******************************************************************************
2		* Project: Common Portability Library
3		* Purpose: Function wrapper for libjson-c access.
4		* Author: Dmitry Baryshnikov, dmitry.baryshnikov@nextgis.com
5		*
6		******************************************************************************
7		* Copyright (c) 2017-2018 NextGIS, <info@nextgis.com>
8		*
9		* SPDX-License-Identifier: MIT
10		****************************************************************************/
11
12		#ifndef CPL_JSON_H_INCLUDED
13		#define CPL_JSON_H_INCLUDED
14
15		#include "cpl_progress.h"
16		#include "cpl_string.h"
17
18		#include <cstdint>
19		#include <initializer_list>
20		#include <iterator>
21		#include <string>
22		#if __cplusplus >= 201703L \|\| (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
23		#include <string_view>
24		#endif
25		#include <vector>
26
27		/**
28		* \file cpl_json.h
29		*
30		* Interface for read and write JSON documents
31		*/
32
33		/! @cond Doxygen_Suppress /
34		typedef void *JSONObjectH;
35
36		class CPLJSONObject;
37		class CPLJSONArray;
38
39		class CPLJSONObjectProxy
40		{
41		CPLJSONObject &oObj;
42		const std::string osName;
43
44		public:
45		explicit inline CPLJSONObjectProxy(CPLJSONObject &oObjIn,
46		const std::string &osNameIn)
47		: oObj(oObjIn), osName(osNameIn)
48	0	{
49	0	}
50
51		template <class T> inline CPLJSONObjectProxy &operator=(const T &val);
52		};
53
54		/! @endcond /
55
56		/**
57		* @brief The CPLJSONArray class holds JSON object from CPLJSONDocument
58		*/
59		class CPL_DLL CPLJSONObject
60		{
61		friend class CPLJSONArray;
62		friend class CPLJSONDocument;
63
64		public:
65		/**
66		* Json object types
67		*/
68		enum class Type
69		{
70		Unknown,
71		Null,
72		Object,
73		Array,
74		Boolean,
75		String,
76		Integer,
77		Long,
78		Double
79		};
80
81		/**
82		* Json object format to string options
83		*/
84		enum class PrettyFormat
85		{
86		Plain, ///< No extra whitespace or formatting applied
87		Spaced, ///< Minimal whitespace inserted
88		Pretty ///< Formatted output
89		};
90
91		public:
92		/! @cond Doxygen_Suppress /
93		CPLJSONObject();
94		explicit CPLJSONObject(const std::string &osName,
95		const CPLJSONObject &oParent);
96		explicit CPLJSONObject(std::nullptr_t);
97		explicit CPLJSONObject(const std::string &osVal);
98		explicit CPLJSONObject(const char *pszValue);
99		explicit CPLJSONObject(bool bVal);
100		explicit CPLJSONObject(int nVal);
101		explicit CPLJSONObject(int64_t nVal);
102		explicit CPLJSONObject(uint64_t nVal);
103		explicit CPLJSONObject(double dfVal);
104		~CPLJSONObject();
105		CPLJSONObject(const CPLJSONObject &other);
106		CPLJSONObject(CPLJSONObject &&other);
107		CPLJSONObject &operator=(const CPLJSONObject &other);
108		CPLJSONObject &operator=(CPLJSONObject &&other);
109		CPLJSONObject &operator=(CPLJSONArray &&other);
110
111		// This method is not thread-safe
112		CPLJSONObject Clone() const;
113
114		private:
115		explicit CPLJSONObject(const std::string &osName, JSONObjectH poJsonObject);
116		/! @endcond /
117
118		public:
119		// setters
120		void Add(const std::string &osName, const std::string &osValue);
121		#if defined(DOXYGEN_SKIP) \|\| __cplusplus >= 201703L \|\| \
122		(defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
123
124		void Add(const std::string &osName, std::string_view svValue);
125		#endif
126		void Add(const std::string &osName, const char *pszValue);
127		void Add(const std::string &osName, double dfValue);
128		void Add(const std::string &osName, int nValue);
129		void Add(const std::string &osName, GInt64 nValue);
130		void Add(const std::string &osName, uint64_t nValue);
131		void Add(const std::string &osName, const CPLJSONArray &oValue);
132		void Add(const std::string &osName, const CPLJSONObject &oValue);
133		void AddNoSplitName(const std::string &osName, const CPLJSONObject &oValue);
134		void Add(const std::string &osName, bool bValue);
135		void AddNull(const std::string &osName);
136
137		/** Change value by key */
138		template <class T> void Set(const std::string &osName, const T &val)
139	0	{
140	0	Delete(osName);
141	0	Add(osName, val);
142	0	} Unexecuted instantiation: void CPLJSONObject::Set<char const>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const const&) Unexecuted instantiation: void CPLJSONObject::Set<char [7]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [7]) Unexecuted instantiation: void CPLJSONObject::Set<CPLString>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, CPLString const&) Unexecuted instantiation: void CPLJSONObject::Set<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) Unexecuted instantiation: void CPLJSONObject::Set<CPLJSONObject>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, CPLJSONObject const&) Unexecuted instantiation: void CPLJSONObject::Set<char [18]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [18]) Unexecuted instantiation: void CPLJSONObject::Set<char [16]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [16]) Unexecuted instantiation: void CPLJSONObject::Set<char [15]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [15]) Unexecuted instantiation: void CPLJSONObject::Set<double>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, double const&) Unexecuted instantiation: void CPLJSONObject::Set<int>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int const&) Unexecuted instantiation: void CPLJSONObject::Set<CPLJSONArray>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, CPLJSONArray const&) Unexecuted instantiation: void CPLJSONObject::Set<char [6]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [6]) Unexecuted instantiation: void CPLJSONObject::Set<char [8]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [8]) Unexecuted instantiation: void CPLJSONObject::Set<char [13]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [13]) Unexecuted instantiation: void CPLJSONObject::Set<char [57]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [57]) Unexecuted instantiation: void CPLJSONObject::Set<char [32]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [32]) Unexecuted instantiation: void CPLJSONObject::Set<char [10]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [10]) Unexecuted instantiation: void CPLJSONObject::Set<char [11]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [11]) Unexecuted instantiation: void CPLJSONObject::Set<char>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const&) Unexecuted instantiation: void CPLJSONObject::Set<bool>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, bool const&) Unexecuted instantiation: void CPLJSONObject::Set<long long>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, long long const&) Unexecuted instantiation: void CPLJSONObject::Set<char [5]>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char const (&) [5])
143
144		void SetNull(const std::string &osName);
145
146		CPLJSONObject operator[](const std::string &osName);
147
148		/! @cond Doxygen_Suppress /
149
150		// GCC 9.4 seems to be confused by the template and doesn't realize it
151		// returns *this
152		#ifdef __GNUC__
153		#pragma GCC diagnostic push
154		#pragma GCC diagnostic ignored "-Weffc++"
155		#endif
156		template <class T> inline CPLJSONObject &operator=(const T &val)
157	0	{
158	0	CPLAssert(!m_osKeyForSet.empty());
159	0	std::string osKeyForSet = m_osKeyForSet;
160	0	m_osKeyForSet.clear();
161	0	Set(osKeyForSet, val);
162	0	return *this;
163	0	} Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [7]>(char const (&) [7]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char const>(char const const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<CPLString>(CPLString const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [18]>(char const (&) [18]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [16]>(char const (&) [16]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [15]>(char const (&) [15]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<double>(double const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<int>(int const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<CPLJSONArray>(CPLJSONArray const&) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [6]>(char const (&) [6]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [8]>(char const (&) [8]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [13]>(char const (&) [13]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [57]>(char const (&) [57]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [32]>(char const (&) [32]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [10]>(char const (&) [10]) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<char [11]>(char const (&) [11])
164		#ifdef __GNUC__
165		#pragma GCC diagnostic pop
166		#endif
167
168		template <class T>
169		inline CPLJSONObject &operator=(std::initializer_list<T> list);
170
171		JSONObjectH GetInternalHandle() const
172	0	{
173	0	return m_poJsonObject;
174	0	}
175
176		/! @endcond /
177
178		// getters
179		std::string GetString(const std::string &osName,
180		const std::string &osDefault = "") const;
181		double GetDouble(const std::string &osName, double dfDefault = 0.0) const;
182		int GetInteger(const std::string &osName, int nDefault = 0) const;
183		GInt64 GetLong(const std::string &osName, GInt64 nDefault = 0) const;
184		bool GetBool(const std::string &osName, bool bDefault = false) const;
185		std::string ToString(const std::string &osDefault = "") const;
186		double ToDouble(double dfDefault = 0.0) const;
187		int ToInteger(int nDefault = 0) const;
188		GInt64 ToLong(GInt64 nDefault = 0) const;
189		bool ToBool(bool bDefault = false) const;
190		CPLJSONArray ToArray() const;
191		std::string Format(PrettyFormat eFormat) const;
192
193		//
194		void Delete(const std::string &osName);
195		void DeleteNoSplitName(const std::string &osName);
196		CPLJSONArray GetArray(const std::string &osName) const;
197		CPLJSONObject GetObj(const std::string &osName) const;
198		CPLJSONObject operator[](const std::string &osName) const;
199		Type GetType() const;
200
201		/! @cond Doxygen_Suppress /
202		std::string GetName() const
203	0	{
204	0	return m_osKey;
205	0	}
206
207		/! @endcond /
208
209		std::vector<CPLJSONObject> GetChildren() const;
210		bool IsValid() const;
211		void Deinit();
212
213		protected:
214		/! @cond Doxygen_Suppress /
215		CPLJSONObject GetObjectByPath(const std::string &osPath,
216		std::string &osName) const;
217		/! @endcond /
218
219		private:
220		JSONObjectH m_poJsonObject = nullptr;
221		std::string m_osKey{};
222		std::string m_osKeyForSet{};
223		};
224
225		/**
226		* @brief The JSONArray class JSON array from JSONDocument
227		*/
228		class CPL_DLL CPLJSONArray : public CPLJSONObject
229		{
230		friend class CPLJSONObject;
231		friend class CPLJSONDocument;
232
233		public:
234		/! @cond Doxygen_Suppress /
235		CPLJSONArray();
236		explicit CPLJSONArray(const std::string &osName);
237		explicit CPLJSONArray(const CPLJSONObject &other);
238
239		/** Constructor from a list of initial values */
240		template <class T> static CPLJSONArray Build(std::initializer_list<T> list)
241	0	{
242	0	CPLJSONArray oArray;
243	0	for (const auto &val : list)
244	0	oArray.Add(val);
245	0	return oArray;
246	0	} Unexecuted instantiation: CPLJSONArray CPLJSONArray::Build<double>(std::initializer_list<double>) Unexecuted instantiation: CPLJSONArray CPLJSONArray::Build<CPLJSONArray>(std::initializer_list<CPLJSONArray>) Unexecuted instantiation: CPLJSONArray CPLJSONArray::Build<int>(std::initializer_list<int>)
247
248		private:
249		explicit CPLJSONArray(const std::string &osName, JSONObjectH poJsonObject);
250
251		class CPL_DLL ConstIterator
252		{
253		const CPLJSONArray &m_oSelf;
254		int m_nIdx;
255		mutable CPLJSONObject m_oObj{};
256
257		public:
258		using iterator_category = std::input_iterator_tag;
259		using value_type = CPLJSONObject;
260		using difference_type = std::ptrdiff_t;
261		using pointer = CPLJSONObject *;
262		using reference = CPLJSONObject &;
263
264		ConstIterator(const CPLJSONArray &oSelf, bool bStart)
265	0	: m_oSelf(oSelf), m_nIdx(bStart ? 0 : oSelf.Size())
266	0	{
267	0	}
268
269		ConstIterator(const ConstIterator &) = default;
270
271		ConstIterator &operator=(const ConstIterator &other)
272	0	{
273	0	if (this != &other)
274	0	{
275	0	CPLAssert(&m_oSelf == &(other.m_oSelf));
276	0	m_nIdx = other.m_nIdx;
277	0	m_oObj = other.m_oObj;
278	0	}
279	0	return *this;
280	0	}
281
282	0	~ConstIterator() = default;
283
284		CPLJSONObject &operator*() const
285	0	{
286	0	m_oObj = m_oSelf[m_nIdx];
287	0	return m_oObj;
288	0	}
289
290		ConstIterator &operator++()
291	0	{
292	0	m_nIdx++;
293	0	return *this;
294	0	}
295
296		bool operator==(const ConstIterator &it) const
297	0	{
298	0	return m_nIdx == it.m_nIdx;
299	0	}
300
301		bool operator!=(const ConstIterator &it) const
302	0	{
303	0	return m_nIdx != it.m_nIdx;
304	0	}
305		};
306
307		/! @endcond /
308		public:
309		int Size() const;
310
311		//! Return the size of the array
312		inline size_t size() const
313	0	{
314	0	return static_cast<size_t>(Size());
315	0	}
316
317		void AddNull();
318		void Add(const CPLJSONObject &oValue);
319		void Add(const std::string &osValue);
320		#if defined(DOXYGEN_SKIP) \|\| __cplusplus >= 201703L \|\| \
321		(defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
322
323		void Add(std::string_view svValue);
324		#endif
325		void Add(const char *pszValue);
326		void Add(double dfValue);
327		void Add(int nValue);
328		void Add(GInt64 nValue);
329		void Add(uint64_t nValue);
330		void Add(bool bValue);
331
332		CPLJSONObject operator[](int nIndex);
333		const CPLJSONObject operator[](int nIndex) const;
334
335		CPLJSONObject operator[](size_t nIndex);
336		const CPLJSONObject operator[](size_t nIndex) const;
337
338		/** Iterator to first element */
339		ConstIterator begin() const
340	0	{
341	0	return ConstIterator(*this, true);
342	0	}
343
344		/** Iterator to after last element */
345		ConstIterator end() const
346	0	{
347	0	return ConstIterator(*this, false);
348	0	}
349		};
350
351		/**
352		* @brief The CPLJSONDocument class Wrapper class around json-c library
353		*/
354		class CPL_DLL CPLJSONDocument
355		{
356		public:
357		/! @cond Doxygen_Suppress /
358		CPLJSONDocument();
359		~CPLJSONDocument();
360		CPLJSONDocument(const CPLJSONDocument &other);
361		CPLJSONDocument &operator=(const CPLJSONDocument &other);
362		CPLJSONDocument(CPLJSONDocument &&other);
363		CPLJSONDocument &operator=(CPLJSONDocument &&other);
364		/! @endcond /
365
366		bool Save(const std::string &osPath) const;
367		std::string SaveAsString() const;
368
369		CPLJSONObject GetRoot();
370		const CPLJSONObject GetRoot() const;
371		void SetRoot(const CPLJSONObject &oRoot);
372		bool Load(const std::string &osPath);
373		bool LoadMemory(const std::string &osStr);
374		bool LoadMemory(const GByte *pabyData, int nLength = -1);
375		bool LoadChunks(const std::string &osPath, size_t nChunkSize = 16384,
376		GDALProgressFunc pfnProgress = nullptr,
377		void *pProgressArg = nullptr);
378		bool LoadUrl(const std::string &osUrl, const char const papszOptions,
379		GDALProgressFunc pfnProgress = nullptr,
380		void *pProgressArg = nullptr);
381
382		private:
383		mutable JSONObjectH m_poRootJsonObject;
384		};
385
386		/! @cond Doxygen_Suppress /
387		template <class T>
388		inline CPLJSONObject &CPLJSONObject::operator=(std::initializer_list<T> list)
389	0	{
390	0	return operator=(CPLJSONArray::Build(list));
391	0	} Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<double>(std::initializer_list<double>) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<CPLJSONArray>(std::initializer_list<CPLJSONArray>) Unexecuted instantiation: CPLJSONObject& CPLJSONObject::operator=<int>(std::initializer_list<int>)
392
393		/! @endcond /
394
395		CPLStringList CPLParseKeyValueJson(const char *pszJson);
396
397		#endif // CPL_JSON_H_INCLUDED