302 lines
8.5 KiB
C
302 lines
8.5 KiB
C
|
/******************************************************************************
|
||
|
|
* 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 <string>
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file cpl_json.h
|
||
|
|
*
|
||
|
|
* Interface for read and write JSON documents
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*! @cond Doxygen_Suppress */
|
||
|
|
typedef void *JSONObjectH;
|
||
|
|
|
||
|
|
CPL_C_START
|
||
|
|
|
||
|
|
class CPLJSONArray;
|
||
|
|
|
||
|
|
/*! @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);
|
||
|
|
|
||
|
|
// 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);
|
||
|
|
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);
|
||
|
|
|
||
|
|
void Set(const std::string &osName, const std::string &osValue);
|
||
|
|
void Set(const std::string &osName, const char *pszValue);
|
||
|
|
void Set(const std::string &osName, double dfValue);
|
||
|
|
void Set(const std::string &osName, int nValue);
|
||
|
|
void Set(const std::string &osName, GInt64 nValue);
|
||
|
|
void Set(const std::string &osName, uint64_t nValue);
|
||
|
|
void Set(const std::string &osName, bool bValue);
|
||
|
|
void SetNull(const std::string &osName);
|
||
|
|
|
||
|
|
/*! @cond Doxygen_Suppress */
|
||
|
|
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{};
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @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);
|
||
|
|
|
||
|
|
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:
|
||
|
|
ConstIterator(const CPLJSONArray &oSelf, bool bStart)
|
||
|
|
: m_oSelf(oSelf), m_nIdx(bStart ? 0 : oSelf.Size())
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
~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;
|
||
|
|
void AddNull();
|
||
|
|
void Add(const CPLJSONObject &oValue);
|
||
|
|
void Add(const std::string &osValue);
|
||
|
|
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;
|
||
|
|
|
||
|
|
/** 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;
|
||
|
|
};
|
||
|
|
|
||
|
|
CPL_C_END
|
||
|
|
|
||
|
|
#if defined(__cplusplus) && !defined(CPL_SUPRESS_CPLUSPLUS)
|
||
|
|
extern "C++"
|
||
|
|
{
|
||
|
|
CPLStringList CPLParseKeyValueJson(const char *pszJson);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // CPL_JSON_H_INCLUDED
|