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/*************** tabjson H Declares Source Code File (.H) **************/
/* Name: tabjson.h Version 1.3 */
/* */
/* (C) Copyright to the author Olivier BERTRAND 2014 - 2021 */
/* */
/* This file contains the JSON classes declares. */
/***********************************************************************/
#pragma once
//#include "osutil.h" // Unuseful and bad for OEM
#include "block.h"
#include "colblk.h"
#include "json.h"
enum JMODE {MODE_OBJECT, MODE_ARRAY, MODE_VALUE};
typedef class JSONDEF *PJDEF;
typedef class TDBJSON *PJTDB;
typedef class JSONCOL *PJCOL;
class TDBJSN;
DllExport PQRYRES JSONColumns(PGLOBAL, PCSZ, PCSZ, PTOS, bool);
/***********************************************************************/
/* The JSON tree node. Can be an Object or an Array. */
/***********************************************************************/
typedef struct _jnode {
PSZ Key; // The key used for object
OPVAL Op; // Operator used for this node
PVAL CncVal; // To cont value used for OP_CNC
PVAL Valp; // The internal array VALUE
int Rank; // The rank in array
int Rx; // Read row number
int Nx; // Next to read row number
} JNODE, *PJNODE;
typedef struct _jncol {
struct _jncol *Next;
char *Name;
char *Fmt;
JTYP Type;
int Len;
int Scale;
bool Cbn;
bool Found;
} JCOL, *PJCL;
/***********************************************************************/
/* Class used to get the columns of a mongo collection. */
/***********************************************************************/
class JSONDISC : public BLOCK {
public:
// Constructor
JSONDISC(PGLOBAL g, uint *lg);
// Functions
int GetColumns(PGLOBAL g, PCSZ db, PCSZ dsn, PTOS topt);
bool Find(PGLOBAL g, PJVAL jvp, PCSZ key, int j);
void AddColumn(PGLOBAL g);
// Members
JCOL jcol;
PJCL jcp, fjcp, pjcp;
//PVL vlp;
PJDEF tdp;
TDBJSN *tjnp;
PJTDB tjsp;
PJPR jpp;
PJSON jsp;
PJOB row;
PCSZ sep;
PCSZ strfy;
char colname[65], fmt[129], buf[16];
uint *length;
int i, n, bf, ncol, lvl, sz, limit;
bool all;
}; // end of JSONDISC
/***********************************************************************/
/* JSON table. */
/***********************************************************************/
class DllExport JSONDEF : public DOSDEF { /* Table description */
friend class TDBJSON;
friend class TDBJSN;
friend class TDBJCL;
friend class JSONDISC;
#if defined(CMGO_SUPPORT)
friend class CMGFAM;
#endif // CMGO_SUPPORT
#if defined(JAVA_SUPPORT)
friend class JMGFAM;
#endif // JAVA_SUPPORT
public:
// Constructor
JSONDEF(void);
// Implementation
const char *GetType(void) override {return "JSON";}
// Methods
bool DefineAM(PGLOBAL g, LPCSTR am, int poff) override;
PTDB GetTable(PGLOBAL g, MODE m) override;
protected:
// Members
JMODE Jmode; /* MODE_OBJECT by default */
PCSZ Objname; /* Name of first level object */
PCSZ Xcol; /* Name of expandable column */
int Limit; /* Limit of multiple values */
int Pretty; /* Depends on file structure */
int Base; /* The array index base */
bool Strict; /* Strict syntax checking */
char Sep; /* The Jpath separator */
const char *Uri; /* MongoDB connection URI */
PCSZ Collname; /* External collection name */
PSZ Options; /* Colist ; Pipe */
PSZ Filter; /* Filter */
PSZ Driver; /* MongoDB Driver (C or JAVA) */
bool Pipe; /* True if Colist is a pipeline */
int Version; /* Driver version */
PSZ Wrapname; /* MongoDB java wrapper name */
}; // end of JSONDEF
/* -------------------------- TDBJSN class --------------------------- */
/***********************************************************************/
/* This is the JSN Access Method class declaration. */
/* The table is a DOS file, each record being a JSON object. */
/***********************************************************************/
class DllExport TDBJSN : public TDBDOS {
friend class JSONCOL;
friend class JSONDEF;
friend class JSONDISC;
#if defined(CMGO_SUPPORT)
friend class CMGFAM;
#endif // CMGO_SUPPORT
#if defined(JAVA_SUPPORT)
friend class JMGFAM;
#endif // JAVA_SUPPORT
public:
// Constructor
TDBJSN(PJDEF tdp, PTXF txfp);
TDBJSN(TDBJSN *tdbp);
// Implementation
AMT GetAmType(void) override {return TYPE_AM_JSN;}
bool SkipHeader(PGLOBAL g) override;
PTDB Duplicate(PGLOBAL g) override {return (PTDB)new(g) TDBJSN(this);}
PJSON GetRow(void) {return Row;}
void SetG(PGLOBAL g) {G = g;}
// Methods
PTDB Clone(PTABS t) override;
PCOL MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n) override;
PCOL InsertSpecialColumn(PCOL colp) override;
int RowNumber(PGLOBAL g, bool b = FALSE) override
{return (b) ? M : N;}
bool CanBeFiltered(void) override
{return Txfp->GetAmType() == TYPE_AM_MGO || !Xcol;}
// Database routines
//int Cardinality(PGLOBAL g) override;
//int GetMaxSize(PGLOBAL g) override;
bool OpenDB(PGLOBAL g) override;
int ReadDB(PGLOBAL g) override;
bool PrepareWriting(PGLOBAL g) override;
int WriteDB(PGLOBAL g) override;
void CloseDB(PGLOBAL g) override;
// Specific routine
int EstimatedLength(void) override;
protected:
PJSON FindRow(PGLOBAL g);
bool MakeTopTree(PGLOBAL g, PJSON jsp);
// Members
PGLOBAL G; // Support of parse memory
PJSON Top; // The top JSON tree
PJSON Row; // The current row
PJVAL Val; // The value of the current row
PJCOL Colp; // The multiple column
JMODE Jmode; // MODE_OBJECT by default
PCSZ Objname; // The table object name
PCSZ Xcol; // Name of expandable column
int Fpos; // The current row index
int N; // The current Rownum
int M; // Index of multiple value
int Limit; // Limit of multiple values
int Pretty; // Depends on file structure
int NextSame; // Same next row
int SameRow; // Same row nb
int Xval; // Index of expandable array
int B; // Array index base
char Sep; // The Jpath separator
bool Strict; // Strict syntax checking
bool Comma; // Row has final comma
bool Xpdable; // False: expandable columns are NULL
}; // end of class TDBJSN
/* -------------------------- JSONCOL class -------------------------- */
/***********************************************************************/
/* Class JSONCOL: JSON access method column descriptor. */
/***********************************************************************/
class DllExport JSONCOL : public DOSCOL {
friend class TDBJSN;
friend class TDBJSON;
#if defined(CMGO_SUPPORT)
friend class CMGFAM;
#endif // CMGO_SUPPORT
#if defined(JAVA_SUPPORT)
friend class JMGFAM;
#endif // JAVA_SUPPORT
public:
// Constructors
JSONCOL(PGLOBAL g, PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i);
JSONCOL(JSONCOL *colp, PTDB tdbp); // Constructor used in copy process
// Implementation
int GetAmType(void) override {return Tjp->GetAmType();}
bool Stringify(void) override { return Sgfy; }
// Methods
bool SetBuffer(PGLOBAL g, PVAL value, bool ok, bool check) override;
bool ParseJpath(PGLOBAL g);
PSZ GetJpath(PGLOBAL g, bool proj) override;
void ReadColumn(PGLOBAL g) override;
void WriteColumn(PGLOBAL g) override;
protected:
bool CheckExpand(PGLOBAL g, int i, PSZ nm, bool b);
bool SetArrayOptions(PGLOBAL g, char *p, int i, PSZ nm);
PVAL GetColumnValue(PGLOBAL g, PJSON row, int i);
PVAL ExpandArray(PGLOBAL g, PJAR arp, int n);
PVAL CalculateArray(PGLOBAL g, PJAR arp, int n);
PVAL MakeJson(PGLOBAL g, PJSON jsp, int n);
PJVAL GetRowValue(PGLOBAL g, PJSON row, int i);
void SetJsonValue(PGLOBAL g, PVAL vp, PJVAL val);
PJSON GetRow(PGLOBAL g);
// Default constructor not to be used
JSONCOL(void) = default;
// Members
PGLOBAL G; // Support of parse memory
TDBJSN *Tjp; // To the JSN table block
PVAL MulVal; // To value used by multiple column
char *Jpath; // The json path
JNODE *Nodes; // The intermediate objects
int Nod; // The number of intermediate objects
int Xnod; // Index of multiple values
char Sep; // The Jpath separator
bool Xpd; // True for expandable column
bool Parsed; // True when parsed
bool Warned; // True when warning issued
bool Sgfy; // True if stringified
}; // end of class JSONCOL
/* -------------------------- TDBJSON class -------------------------- */
/***********************************************************************/
/* This is the JSON Access Method class declaration. */
/***********************************************************************/
class DllExport TDBJSON : public TDBJSN {
friend class JSONDEF;
friend class JSONCOL;
public:
// Constructor
TDBJSON(PJDEF tdp, PTXF txfp);
TDBJSON(PJTDB tdbp);
// Implementation
AMT GetAmType(void) override {return TYPE_AM_JSON;}
PTDB Duplicate(PGLOBAL g) override {return (PTDB)new(g) TDBJSON(this);}
PJAR GetDoc(void) {return Doc;}
// Methods
PTDB Clone(PTABS t) override;
// Database routines
int Cardinality(PGLOBAL g) override;
int GetMaxSize(PGLOBAL g) override;
void ResetSize(void) override;
int GetProgCur(void) override {return N;}
int GetRecpos(void) override;
bool SetRecpos(PGLOBAL g, int recpos) override;
bool OpenDB(PGLOBAL g) override;
int ReadDB(PGLOBAL g) override;
bool PrepareWriting(PGLOBAL g) override {return false;}
int WriteDB(PGLOBAL g) override;
int DeleteDB(PGLOBAL g, int irc) override;
void CloseDB(PGLOBAL g) override;
int MakeDocument(PGLOBAL g);
// Optimization routines
int MakeIndex(PGLOBAL g, PIXDEF pxdf, bool add) override;
protected:
int MakeNewDoc(PGLOBAL g);
// Members
PJAR Doc; // The document array
int Multiple; // 0: No 1: DIR 2: Section 3: filelist
bool Done; // True when document parsing is done
bool Changed; // After Update, Insert or Delete
}; // end of class TDBJSON
/***********************************************************************/
/* This is the class declaration for the JSON catalog table. */
/***********************************************************************/
class DllExport TDBJCL : public TDBCAT {
public:
// Constructor
TDBJCL(PJDEF tdp);
protected:
// Specific routines
PQRYRES GetResult(PGLOBAL g) override;
// Members
PTOS Topt;
PCSZ Db;
PCSZ Dsn;
}; // end of class TDBJCL
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