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MFPC.fpJSON.pp
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MFPC.fpJSON.pp
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{
This file is part of the Free Component Library
JSON Data structures
Copyright (c) 2007 by Michael Van Canneyt michael@freepascal.org
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{$mode objfpc}
{$h+}
unit MFPC.fpJSON;
interface
uses
variants,
SysUtils,
MFPC.Classes.SHARED, MFPC.Classes.Streams,
//classes,
MFPC.Contnrs;
type
TJSONtype = (jtUnknown, jtNumber, jtString, jtBoolean, jtNull, jtArray, jtObject);
TJSONInstanceType = (jitUnknown, jitNumberInteger,jitNumberInt64,jitNumberQWord,jitNumberFloat,
jitString, jitBoolean, jitNull, jitArray, jitObject);
TJSONFloat = Double;
TJSONStringType = UTF8String;
TJSONUnicodeStringType = Unicodestring;
TJSONCharType = AnsiChar;
PJSONCharType = ^TJSONCharType;
TFormatOption = (foSingleLineArray, // Array without CR/LF : all on one line
foSingleLineObject, // Object without CR/LF : all on one line
foDoNotQuoteMembers, // Do not quote object member names.
foUseTabchar, // Use tab characters instead of spaces.
foSkipWhiteSpace); // Do not use whitespace at all
TFormatOptions = set of TFormatOption;
Const
DefaultIndentSize = 2;
DefaultFormat = [];
AsJSONFormat = [foSingleLineArray,foSingleLineObject]; // These options make FormatJSON behave as AsJSON
AsCompressedJSON = [foSingleLineArray,foSingleLineObject,foskipWhiteSpace]; // These options make FormatJSON behave as AsJSON with TJSONData.CompressedJSON=True
AsCompactJSON = [foSingleLineArray,foSingleLineObject,foskipWhiteSpace,foDoNotQuoteMembers]; // These options make FormatJSON behave as AsJSON with TJSONData.CompressedJSON=True and TJSONObject.UnquotedMemberNames=True
ValueJSONTypes = [jtNumber, jtString, jtBoolean, jtNull];
ActualValueJSONTypes = ValueJSONTypes - [jtNull];
StructuredJSONTypes = [jtArray,jtObject];
Type
TJSONData = Class;
{ TMJBaseObjectEnumerator }
TJSONEnum = Record
Key : TJSONStringType;
KeyNum : Integer;
Value : TJSONData;
end;
TBaseJSONEnumerator = class
public
function GetCurrent: TJSONEnum; virtual; abstract;
function MoveNext : Boolean; virtual; abstract;
property Current: TJSONEnum read GetCurrent;
end;
{ TMJObjectEnumerator }
{ TJSONData }
TJSONData = class(TObject)
private
Const
ElementSeps : Array[Boolean] of TJSONStringType = (', ',',');
Class Var FCompressedJSON : Boolean;
Class Var FElementSep : TJSONStringType;
class procedure DetermineElementSeparators;
class function GetCompressedJSON: Boolean; static;
class procedure SetCompressedJSON(AValue: Boolean); static;
protected
Class Procedure DoError(Const Msg : String);
Class Procedure DoError(Const Fmt : String; const Args : Array of const);
Function DoFindPath(Const APath : TJSONStringType; Out NotFound : TJSONStringType) : TJSONdata; virtual;
function GetAsBoolean: Boolean; virtual; abstract;
function GetAsFloat: TJSONFloat; virtual; abstract;
function GetAsInteger: Integer; virtual; abstract;
function GetAsInt64: Int64; virtual; abstract;
function GetAsQWord: QWord; virtual; abstract;
function GetIsNull: Boolean; virtual;
procedure SetAsBoolean(const AValue: Boolean); virtual; abstract;
procedure SetAsFloat(const AValue: TJSONFloat); virtual; abstract;
procedure SetAsInteger(const AValue: Integer); virtual; abstract;
procedure SetAsInt64(const AValue: Int64); virtual; abstract;
procedure SetAsQword(const AValue: QWord); virtual; abstract;
function GetAsJSON: TJSONStringType; virtual; abstract;
function GetAsString: TJSONStringType; virtual; abstract;
procedure SetAsString(const AValue: TJSONStringType); virtual; abstract;
function GetAsUnicodeString: TJSONUnicodeStringType; virtual;
procedure SetAsUnicodeString(const AValue: TJSONUnicodeStringType); virtual;
function GetValue: variant; virtual; abstract;
procedure SetValue(const AValue: variant); virtual; abstract;
function GetItem(Index : Integer): TJSONData; virtual;
procedure SetItem(Index : Integer; const AValue: TJSONData); virtual;
Function DoFormatJSON(Options : TFormatOptions; CurrentIndent, Indent : Integer) : TJSONStringType; virtual;
function GetCount: Integer; virtual;
Public
Class function JSONType: TJSONType; virtual;
Class Property CompressedJSON : Boolean Read GetCompressedJSON Write SetCompressedJSON;
public
Constructor Create; virtual;
Procedure Clear; virtual; Abstract;
Procedure DumpJSON(S : TM_Stream);
// Get enumerator
function GetEnumerator: TBaseJSONEnumerator; virtual;
Function FindPath(Const APath : TJSONStringType) : TJSONdata;
Function GetPath(Const APath : TJSONStringType) : TJSONdata;
Function Clone : TJSONData; virtual; abstract;
Function FormatJSON(Options : TFormatOptions = DefaultFormat; Indentsize : Integer = DefaultIndentSize) : TJSONStringType;
property Count: Integer read GetCount;
property Items[Index: Integer]: TJSONData read GetItem write SetItem;
property Value: variant read GetValue write SetValue;
Property AsString : TJSONStringType Read GetAsString Write SetAsString;
Property AsUnicodeString : TJSONUnicodeStringType Read GetAsUnicodeString Write SetAsUnicodeString;
Property AsFloat : TJSONFloat Read GetAsFloat Write SetAsFloat;
Property AsInteger : Integer Read GetAsInteger Write SetAsInteger;
Property AsInt64 : Int64 Read GetAsInt64 Write SetAsInt64;
Property AsQWord : QWord Read GetAsQWord Write SetAsQword;
Property AsBoolean : Boolean Read GetAsBoolean Write SetAsBoolean;
Property IsNull : Boolean Read GetIsNull;
Property AsJSON : TJSONStringType Read GetAsJSON;
end;
TJSONDataClass = Class of TJSONData;
TJSONNumberType = (ntFloat,ntInteger,ntInt64,ntQWord);
TJSONNumber = class(TJSONData)
protected
public
class function JSONType: TJSONType; override;
class function NumberType : TJSONNumberType; virtual; abstract;
end;
{ TJSONFloatNumber }
TJSONFloatNumber = class(TJSONNumber)
Private
FValue : TJSONFloat;
protected
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
public
Constructor Create(AValue : TJSONFloat); reintroduce;
class function NumberType : TJSONNumberType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONFloatNumberClass = Class of TJSONFloatNumber;
{ TJSONIntegerNumber }
TJSONIntegerNumber = class(TJSONNumber)
Private
FValue : Integer;
protected
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
public
Constructor Create(AValue : Integer); reintroduce;
class function NumberType : TJSONNumberType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONIntegerNumberClass = Class of TJSONIntegerNumber;
{ TJSONInt64Number }
TJSONInt64Number = class(TJSONNumber)
Private
FValue : Int64;
protected
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
public
Constructor Create(AValue : Int64); reintroduce;
class function NumberType : TJSONNumberType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONInt64NumberClass = Class of TJSONInt64Number;
{ TJSONQWordNumber }
TJSONQWordNumber = class(TJSONNumber)
Private
FValue : Qword;
protected
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
public
Constructor Create(AValue : QWord); reintroduce;
class function NumberType : TJSONNumberType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONQWordNumberClass = Class of TJSONQWordNumber;
{ TJSONString }
TJSONString = class(TJSONData)
Private
FValue: TJSONStringType;
protected
function GetValue: Variant; override;
procedure SetValue(const AValue: Variant); override;
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
Public
Class var StrictEscaping : Boolean;
public
Constructor Create(const AValue : TJSONStringType); reintroduce;
Constructor Create(const AValue : TJSONUnicodeStringType); reintroduce;
class function JSONType: TJSONType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONStringClass = Class of TJSONString;
{ TJSONboolean }
TJSONBoolean = class(TJSONData)
Private
FValue: Boolean;
protected
function GetValue: Variant; override;
procedure SetValue(const AValue: Variant); override;
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
public
Constructor Create(AValue : Boolean); reintroduce;
class function JSONType: TJSONType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONBooleanClass = Class of TJSONBoolean;
{ TJSONnull }
TJSONNull = class(TJSONData)
protected
Procedure Converterror(From : Boolean);
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
function GetIsNull: Boolean; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
public
class function JSONType: TJSONType; override;
Procedure Clear; override;
Function Clone : TJSONData; override;
end;
TJSONNullClass = Class of TJSONNull;
TJSONArrayIterator = procedure(Item: TJSONData; Data: TObject; var Continue: Boolean) of object;
{ TJSONArray }
TJSONObject = Class;
TJSONArray = class(TJSONData)
Private
FList : TM_FPObjectList;
function GetArrays(Index : Integer): TJSONArray;
function GetBooleans(Index : Integer): Boolean;
function GetFloats(Index : Integer): TJSONFloat;
function GetIntegers(Index : Integer): Integer;
function GetInt64s(Index : Integer): Int64;
function GetNulls(Index : Integer): Boolean;
function GetObjects(Index : Integer): TJSONObject;
function GetQWords(Index : Integer): QWord;
function GetStrings(Index : Integer): TJSONStringType;
function GetUnicodeStrings(Index : Integer): TJSONUnicodeStringType;
function GetTypes(Index : Integer): TJSONType;
procedure SetArrays(Index : Integer; const AValue: TJSONArray);
procedure SetBooleans(Index : Integer; const AValue: Boolean);
procedure SetFloats(Index : Integer; const AValue: TJSONFloat);
procedure SetIntegers(Index : Integer; const AValue: Integer);
procedure SetInt64s(Index : Integer; const AValue: Int64);
procedure SetObjects(Index : Integer; const AValue: TJSONObject);
procedure SetQWords(Index : Integer; AValue: QWord);
procedure SetStrings(Index : Integer; const AValue: TJSONStringType);
procedure SetUnicodeStrings(Index : Integer; const AValue: TJSONUnicodeStringType);
protected
Function DoFindPath(Const APath : TJSONStringType; Out NotFound : TJSONStringType) : TJSONdata; override;
Procedure Converterror(From : Boolean);
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
function GetCount: Integer; override;
function GetItem(Index : Integer): TJSONData; override;
procedure SetItem(Index : Integer; const AValue: TJSONData); override;
Function DoFormatJSON(Options : TFormatOptions; CurrentIndent, Indent : Integer) : TJSONStringType; override;
public
Constructor Create; overload; reintroduce;
Constructor Create(const Elements : Array of Const); overload;
Destructor Destroy; override;
class function JSONType: TJSONType; override;
Function Clone : TJSONData; override;
// Examine
procedure Iterate(Iterator : TJSONArrayIterator; Data: TObject);
function IndexOf(obj: TJSONData): Integer;
function GetEnumerator: TBaseJSONEnumerator; override;
// Manipulate
Procedure Clear; override;
function Add(Item : TJSONData): Integer;
function Add(I : Integer): Integer;
function Add(I : Int64): Int64;
function Add(I : QWord): QWord;
function Add(const S : String): Integer;
function Add(const S : UnicodeString): Integer;
function Add: Integer;
function Add(F : TJSONFloat): Integer;
function Add(B : Boolean): Integer;
function Add(AnArray : TJSONArray): Integer;
function Add(AnObject: TJSONObject): Integer;
Procedure Delete(Index : Integer);
procedure Exchange(Index1, Index2: Integer);
function Extract(Item: TJSONData): TJSONData;
function Extract(Index : Integer): TJSONData;
procedure Insert(Index: Integer);
procedure Insert(Index: Integer; Item : TJSONData);
procedure Insert(Index: Integer; I : Integer);
procedure Insert(Index: Integer; I : Int64);
procedure Insert(Index: Integer; I : QWord);
procedure Insert(Index: Integer; const S : String);
procedure Insert(Index: Integer; const S : UnicodeString);
procedure Insert(Index: Integer; F : TJSONFloat);
procedure Insert(Index: Integer; B : Boolean);
procedure Insert(Index: Integer; AnArray : TJSONArray);
procedure Insert(Index: Integer; AnObject: TJSONObject);
procedure Move(CurIndex, NewIndex: Integer);
Procedure Remove(Item : TJSONData);
Procedure Sort(Compare: TListSortCompare);
// Easy Access Properties.
property Items;default;
Property Types[Index : Integer] : TJSONType Read GetTypes;
Property Nulls[Index : Integer] : Boolean Read GetNulls;
Property Integers[Index : Integer] : Integer Read GetIntegers Write SetIntegers;
Property Int64s[Index : Integer] : Int64 Read GetInt64s Write SetInt64s;
Property QWords[Index : Integer] : QWord Read GetQWords Write SetQWords;
Property Strings[Index : Integer] : TJSONStringType Read GetStrings Write SetStrings;
Property UnicodeStrings[Index : Integer] : TJSONUnicodeStringType Read GetUnicodeStrings Write SetUnicodeStrings;
Property Floats[Index : Integer] : TJSONFloat Read GetFloats Write SetFloats;
Property Booleans[Index : Integer] : Boolean Read GetBooleans Write SetBooleans;
Property Arrays[Index : Integer] : TJSONArray Read GetArrays Write SetArrays;
Property Objects[Index : Integer] : TJSONObject Read GetObjects Write SetObjects;
end;
TJSONArrayClass = Class of TJSONArray;
TJSONObjectIterator = procedure(Const AName : TJSONStringType; Item: TJSONData; Data: TObject; var Continue: Boolean) of object;
{ TJSONObject }
TJSONObject = class(TJSONData)
private
Const
ElementStart : Array[Boolean] of TJSONStringType = ('"','');
SpacedQuoted : Array[Boolean] of TJSONStringType = ('" : ',' : ');
UnSpacedQuoted : Array[Boolean] of TJSONStringType = ('":',':');
ObjStartSeps : Array[Boolean] of TJSONStringType = ('{ ','{');
ObjEndSeps : Array[Boolean] of TJSONStringType = (' }','}');
Class var FUnquotedMemberNames: Boolean;
Class var FObjStartSep,FObjEndSep,FElementEnd,FElementStart : TJSONStringType;
Class procedure DetermineElementQuotes;
Private
FHash : TM_FPHashObjectList; // Careful : Names limited to 255 chars.
function GetArrays(const AName : String): TJSONArray;
function GetBooleans(const AName : String): Boolean;
function GetElements(const AName: string): TJSONData;
function GetFloats(const AName : String): TJSONFloat;
function GetIntegers(const AName : String): Integer;
function GetInt64s(const AName : String): Int64;
function GetIsNull(const AName : String): Boolean; reintroduce;
function GetNameOf(Index : Integer): TJSONStringType;
function GetObjects(const AName : String): TJSONObject;
function GetQWords(AName : String): QWord;
function GetStrings(const AName : String): TJSONStringType;
function GetUnicodeStrings(const AName : String): TJSONUnicodeStringType;
function GetTypes(const AName : String): TJSONType;
procedure SetArrays(const AName : String; const AValue: TJSONArray);
procedure SetBooleans(const AName : String; const AValue: Boolean);
procedure SetElements(const AName: string; const AValue: TJSONData);
procedure SetFloats(const AName : String; const AValue: TJSONFloat);
procedure SetIntegers(const AName : String; const AValue: Integer);
procedure SetInt64s(const AName : String; const AValue: Int64);
procedure SetIsNull(const AName : String; const AValue: Boolean);
procedure SetObjects(const AName : String; const AValue: TJSONObject);
procedure SetQWords(AName : String; AValue: QWord);
procedure SetStrings(const AName : String; const AValue: TJSONStringType);
procedure SetUnicodeStrings(const AName : String; const AValue: TJSONUnicodeStringType);
class function GetUnquotedMemberNames: Boolean; static;
class procedure SetUnquotedMemberNames(AValue: Boolean); static;
protected
Function DoFindPath(Const APath : TJSONStringType; Out NotFound : TJSONStringType) : TJSONdata; override;
Procedure Converterror(From : Boolean);
function GetAsBoolean: Boolean; override;
function GetAsFloat: TJSONFloat; override;
function GetAsInteger: Integer; override;
function GetAsInt64: Int64; override;
function GetAsQWord: QWord; override;
procedure SetAsBoolean(const AValue: Boolean); override;
procedure SetAsFloat(const AValue: TJSONFloat); override;
procedure SetAsInteger(const AValue: Integer); override;
procedure SetAsInt64(const AValue: Int64); override;
procedure SetAsQword(const AValue: QWord); override;
function GetAsJSON: TJSONStringType; override;
function GetAsString: TJSONStringType; override;
procedure SetAsString(const AValue: TJSONStringType); override;
function GetValue: variant; override;
procedure SetValue(const AValue: variant); override;
function GetCount: Integer; override;
function GetItem(Index : Integer): TJSONData; override;
procedure SetItem(Index : Integer; const AValue: TJSONData); override;
Function DoFormatJSON(Options : TFormatOptions; CurrentIndent, Indent : Integer) : TJSONStringType; override;
public
constructor Create; reintroduce;
Constructor Create(const Elements : Array of Const); overload;
destructor Destroy; override;
class function JSONType: TJSONType; override;
Class Property UnquotedMemberNames : Boolean Read GetUnquotedMemberNames Write SetUnquotedMemberNames;
Function Clone : TJSONData; override;
function GetEnumerator: TBaseJSONEnumerator; override;
// Examine
procedure Iterate(Iterator : TJSONObjectIterator; Data: TObject);
function IndexOf(Item: TJSONData): Integer;
Function IndexOfName(const AName: TJSONStringType; CaseInsensitive : Boolean = False): Integer;
Function Find(Const AName : String) : TJSONData; overload;
Function Find(Const AName : String; AType : TJSONType) : TJSONData; overload;
function Find(const key: TJSONStringType; out AValue: TJSONData): boolean;
function Find(const key: TJSONStringType; out AValue: TJSONObject): boolean;
function Find(const key: TJSONStringType; out AValue: TJSONArray): boolean;
function Find(const key: TJSONStringType; out AValue: TJSONString): boolean;
function Find(const key: TJSONStringType; out AValue: TJSONBoolean): boolean;
function Find(const key: TJSONStringType; out AValue: TJSONNumber): boolean;
Function Get(Const AName : String) : Variant;
Function Get(Const AName : String; ADefault : TJSONFloat) : TJSONFloat;
Function Get(Const AName : String; ADefault : Integer) : Integer;
Function Get(Const AName : String; ADefault : Int64) : Int64;
Function Get(Const AName : String; ADefault : QWord) : QWord;
Function Get(Const AName : String; ADefault : Boolean) : Boolean;
Function Get(Const AName : String; ADefault : TJSONStringType) : TJSONStringType;
Function Get(Const AName : String; ADefault : TJSONUnicodeStringType) : TJSONUnicodeStringType;
Function Get(Const AName : String; ADefault : TJSONArray) : TJSONArray;
Function Get(Const AName : String; ADefault : TJSONObject) : TJSONObject;
// Manipulate
Procedure Clear; override;
function Add(const AName: TJSONStringType; AValue: TJSONData): Integer; overload;
function Add(const AName: TJSONStringType; AValue: Boolean): Integer; overload;
function Add(const AName: TJSONStringType; AValue: TJSONFloat): Integer; overload;
function Add(const AName, AValue: TJSONStringType): Integer; overload;
function Add(const AName : String; AValue: TJSONUnicodeStringType): Integer; overload;
function Add(const AName: TJSONStringType; Avalue: Integer): Integer; overload;
function Add(const AName: TJSONStringType; Avalue: Int64): Integer; overload;
function Add(const AName: TJSONStringType; Avalue: QWord): Integer; overload;
function Add(const AName: TJSONStringType): Integer; overload;
function Add(const AName: TJSONStringType; AValue : TJSONArray): Integer; overload;
procedure Delete(Index : Integer);
procedure Delete(Const AName : string);
procedure Remove(Item : TJSONData);
Function Extract(Index : Integer) : TJSONData;
Function Extract(Const AName : string) : TJSONData;
// Easy access properties.
property Names[Index : Integer] : TJSONStringType read GetNameOf;
property Elements[AName: string] : TJSONData read GetElements write SetElements; default;
Property Types[AName : String] : TJSONType Read GetTypes;
Property Nulls[AName : String] : Boolean Read GetIsNull Write SetIsNull;
Property Floats[AName : String] : TJSONFloat Read GetFloats Write SetFloats;
Property Integers[AName : String] : Integer Read GetIntegers Write SetIntegers;
Property Int64s[AName : String] : Int64 Read GetInt64s Write SetInt64s;
Property QWords[AName : String] : QWord Read GetQWords Write SetQWords;
Property Strings[AName : String] : TJSONStringType Read GetStrings Write SetStrings;
Property UnicodeStrings[AName : String] : TJSONUnicodeStringType Read GetUnicodeStrings Write SetUnicodeStrings;
Property Booleans[AName : String] : Boolean Read GetBooleans Write SetBooleans;
Property Arrays[AName : String] : TJSONArray Read GetArrays Write SetArrays;
Property Objects[AName : String] : TJSONObject Read GetObjects Write SetObjects;
end;
TJSONObjectClass = Class of TJSONObject;
EJSON = Class(Exception);
TJSONParserHandler = Procedure(AStream : TM_Stream; Const AUseUTF8 : Boolean; Out Data : TJSONData);
Function SetJSONInstanceType(AType : TJSONInstanceType; AClass : TJSONDataClass) : TJSONDataClass;
Function GetJSONInstanceType(AType : TJSONInstanceType) : TJSONDataClass;
Function StringToJSONString(const S : TJSONStringType; Strict : Boolean = False) : TJSONStringType;
Function JSONStringToString(const S : TJSONStringType) : TJSONStringType;
Function JSONTypeName(JSONType : TJSONType) : String;
// These functions create JSONData structures, taking into account the instance types
Function CreateJSON : TJSONNull;
Function CreateJSON(Data : Boolean) : TJSONBoolean;
Function CreateJSON(Data : Integer) : TJSONIntegerNumber;
Function CreateJSON(Data : Int64) : TJSONInt64Number;
Function CreateJSON(Data : QWord) : TJSONQWordNumber;
Function CreateJSON(Data : TJSONFloat) : TJSONFloatNumber;
Function CreateJSON(const Data : TJSONStringType) : TJSONString;
Function CreateJSON(const Data : TJSONUnicodeStringType) : TJSONString;
Function CreateJSONArray(const Data : Array of const) : TJSONArray;
Function CreateJSONObject(const Data : Array of const) : TJSONObject;
// These functions rely on a callback. If the callback is not set, they will raise an error.
// When the jsonparser unit is included in the project, the callback is automatically set.
Function GetJSON(Const JSON : TJSONStringType; Const UseUTF8 : Boolean = True) : TJSONData;
Function GetJSON(Const JSON : TM_Stream; Const UseUTF8 : Boolean = True) : TJSONData;
Function SetJSONParserHandler(AHandler : TJSONParserHandler) : TJSONParserHandler;
Function GetJSONParserHandler : TJSONParserHandler;
implementation
Uses typinfo;
Resourcestring
SErrCannotConvertFromNull = 'Cannot convert data from Null value';
SErrCannotConvertToNull = 'Cannot convert data to Null value';
SErrCannotConvertFromArray = 'Cannot convert data from array value';
SErrCannotConvertToArray = 'Cannot convert data to array value';
SErrCannotConvertFromObject = 'Cannot convert data from object value';
SErrCannotConvertToObject = 'Cannot convert data to object value';
SErrInvalidFloat = 'Invalid float value : %s';
SErrCannotSetNotIsNull = 'IsNull cannot be set to False';
SErrCannotAddArrayTwice = 'Adding an array object to an array twice is not allowed';
SErrCannotAddObjectTwice = 'Adding an object to an array twice is not allowed';
SErrUnknownTypeInConstructor = 'Unknown type in JSON%s constructor: %d';
SErrNotJSONData = 'Cannot add object of type %s to TJSON%s';
SErrPointerNotNil = 'Cannot add non-nil pointer to JSON%s';
SErrOddNumber = 'TJSONObject must be constructed with name,value pairs';
SErrNameMustBeString = 'TJSONObject constructor element name at pos %d is not a string';
SErrNonexistentElement = 'Unknown object member: "%s"';
SErrPathElementNotFound = 'Path "%s" invalid: element "%s" not found.';
SErrWrongInstanceClass = 'Cannot set instance class: %s does not descend from %s.';
SErrNoParserHandler = 'No JSON parser handler installed. Recompile your project with the jsonparser unit included';
Var
DefaultJSONInstanceTypes :
Array [TJSONInstanceType] of TJSONDataClass = (TJSONData, TJSONIntegerNumber,
TJSONInt64Number, TJSONQWordNumber, TJSONFloatNumber, TJSONString, TJSONBoolean, TJSONNull, TJSONArray,
TJSONObject);
Const
MinJSONInstanceTypes :
Array [TJSONInstanceType] of TJSONDataClass = (TJSONData, TJSONIntegerNumber,
TJSONInt64Number, TJSONQWordNumber, TJSONFloatNumber, TJSONString, TJSONBoolean, TJSONNull, TJSONArray,
TJSONObject);
function SetJSONInstanceType(AType: TJSONInstanceType; AClass: TJSONDataClass): TJSONDataClass;
begin
if AClass=Nil then
TJSONData.DoError(SErrWrongInstanceClass,['Nil',MinJSONInstanceTypes[AType].ClassName]);
if Not AClass.InheritsFrom(MinJSONINstanceTypes[AType]) then
TJSONData.DoError(SErrWrongInstanceClass,[AClass.ClassName,MinJSONInstanceTypes[AType].ClassName]);
Result:=DefaultJSONInstanceTypes[AType];
DefaultJSONINstanceTypes[AType]:=AClass;
end;
function GetJSONInstanceType(AType: TJSONInstanceType): TJSONDataClass;
begin
Result:=DefaultJSONInstanceTypes[AType]
end;
function StringToJSONString(const S: TJSONStringType; Strict : Boolean = False): TJSONStringType;
Var
I,J,L : Integer;
P : PJSONCharType;
C : AnsiChar;
begin
I:=1;
J:=1;
Result:='';
L:=Length(S);
P:=PJSONCharType(S);
While I<=L do
begin
C:=AnsiChar(P^);
if (C in ['"','/','\',#0..#31]) then
begin
Result:=Result+Copy(S,J,I-J);
Case C of
'\' : Result:=Result+'\\';
'/' : if Strict then
Result:=Result+'\/'
else
Result:=Result+'/';
'"' : Result:=Result+'\"';
#8 : Result:=Result+'\b';
#9 : Result:=Result+'\t';
#10 : Result:=Result+'\n';
#12 : Result:=Result+'\f';
#13 : Result:=Result+'\r';
else
Result:=Result+'\u'+HexStr(Ord(C),4);
end;
J:=I+1;
end;
Inc(I);
Inc(P);
end;
Result:=Result+Copy(S,J,I-1);
end;
function JSONStringToString(const S: TJSONStringType): TJSONStringType;
Var
I,J,L : Integer;
P : PJSONCharType;
w : String;
begin
I:=1;
J:=1;
L:=Length(S);
Result:='';
P:=PJSONCharType(S);
While (I<=L) do
begin
if (P^='\') then
begin
Result:=Result+Copy(S,J,I-J);
Inc(P);
If (P^<>#0) then
begin
Inc(I);
Case AnsiChar(P^) of
'\','"','/'
: Result:=Result+P^;
'b' : Result:=Result+#8;
't' : Result:=Result+#9;
'n' : Result:=Result+#10;
'f' : Result:=Result+#12;
'r' : Result:=Result+#13;
'u' : begin
W:=Copy(S,I+1,4);
Inc(I,4);
Inc(P,4);
Result:=Result+WideChar(StrToInt('$'+W));
end;
end;
end;
J:=I+1;
end;
Inc(I);
Inc(P);
end;
Result:=Result+Copy(S,J,I-J+1);
end;
function JSONTypeName(JSONType: TJSONType): String;
begin
Result:=GetEnumName(TypeInfo(TJSONType),Ord(JSONType));
end;
function CreateJSON: TJSONNull;
begin
Result:=TJSONNullClass(DefaultJSONInstanceTypes[jitNull]).Create
end;
function CreateJSON(Data: Boolean): TJSONBoolean;
begin
Result:=TJSONBooleanClass(DefaultJSONInstanceTypes[jitBoolean]).Create(Data);
end;
function CreateJSON(Data: Integer): TJSONIntegerNumber;
begin
Result:=TJSONIntegerNumberCLass(DefaultJSONInstanceTypes[jitNumberInteger]).Create(Data);
end;
function CreateJSON(Data: Int64): TJSONInt64Number;
begin
Result:=TJSONInt64NumberCLass(DefaultJSONInstanceTypes[jitNumberInt64]).Create(Data);
end;
function CreateJSON(Data: QWord): TJSONQWordNumber;
begin
Result:=TJSONQWordNumberClass(DefaultJSONInstanceTypes[jitNumberQWord]).Create(Data);
end;
function CreateJSON(Data: TJSONFloat): TJSONFloatNumber;
begin
Result:=TJSONFloatNumberCLass(DefaultJSONInstanceTypes[jitNumberFloat]).Create(Data);
end;
function CreateJSON(const Data: TJSONStringType): TJSONString;
begin
Result:=TJSONStringCLass(DefaultJSONInstanceTypes[jitString]).Create(Data);
end;
function CreateJSON(const Data: TJSONUnicodeStringType): TJSONString;
begin
Result:=TJSONStringCLass(DefaultJSONInstanceTypes[jitString]).Create(Data);
end;
function CreateJSONArray(const Data: array of const): TJSONArray;
begin
Result:=TJSONArrayCLass(DefaultJSONInstanceTypes[jitArray]).Create(Data);
end;
function CreateJSONObject(const Data: array of const): TJSONObject;
begin
Result:=TJSONObjectClass(DefaultJSONInstanceTypes[jitObject]).Create(Data);
end;
Var
JPH : TJSONParserHandler;
function GetJSON(const JSON: TJSONStringType; const UseUTF8: Boolean): TJSONData;
Var
SS : TM_StringStream;
begin
SS:=TM_StringStream.Create(JSON);
try
Result:=GetJSON(SS,UseUTF8);
finally
SS.Free;
end;
end;
function GetJSON(const JSON: TM_Stream; const UseUTF8: Boolean): TJSONData;
begin
Result:=Nil;
If (JPH=Nil) then
TJSONData.DoError(SErrNoParserHandler);
JPH(JSON,UseUTF8,Result);
end;
function SetJSONParserHandler(AHandler: TJSONParserHandler): TJSONParserHandler;
begin
Result:=JPH;
JPH:=AHandler;
end;
function GetJSONParserHandler: TJSONParserHandler;
begin
Result:=JPH;
end;
Type
{ TJSONEnumerator }
TJSONEnumerator = class(TBaseJSONEnumerator)
Private
FData : TJSONData;
public
Constructor Create(AData : TJSONData);
function GetCurrent: TJSONEnum; override;
function MoveNext : Boolean; override;
end;
{ TJSONArrayEnumerator }
TJSONArrayEnumerator = class(TBaseJSONEnumerator)
Private
FData : TJSONArray;
FCurrent : Integer;
public
Constructor Create(AData : TJSONArray);
function GetCurrent: TJSONEnum; override;
function MoveNext : Boolean; override;
end;
{ TJSONObjectEnumerator }
TJSONObjectEnumerator = class(TBaseJSONEnumerator)
Private
FData : TJSONObject;
FCurrent : Integer;
public
Constructor Create(AData : TJSONObject);
function GetCurrent: TJSONEnum; override;
function MoveNext : Boolean; override;
end;
{ TJSONQWordNumber }
function TJSONQWordNumber.GetAsBoolean: Boolean;
begin
Result:=FValue<>0;
end;
function TJSONQWordNumber.GetAsFloat: TJSONFloat;
begin
Result:= FValue;
end;
function TJSONQWordNumber.GetAsInteger: Integer;
begin
Result := FValue;
end;
function TJSONQWordNumber.GetAsInt64: Int64;
begin
Result := FValue;
end;
function TJSONQWordNumber.GetAsQWord: QWord;
begin
Result := FValue;
end;
procedure TJSONQWordNumber.SetAsBoolean(const AValue: Boolean);
begin
FValue:=Ord(AValue);
end;
procedure TJSONQWordNumber.SetAsFloat(const AValue: TJSONFloat);
begin
FValue:=Round(AValue);
end;
procedure TJSONQWordNumber.SetAsInteger(const AValue: Integer);
begin
FValue:=AValue;
end;
procedure TJSONQWordNumber.SetAsInt64(const AValue: Int64);
begin
FValue := AValue;
end;
procedure TJSONQWordNumber.SetAsQword(const AValue: QWord);
begin
FValue:=AValue;
end;
function TJSONQWordNumber.GetAsJSON: TJSONStringType;
begin
Result:=AsString;
end;
function TJSONQWordNumber.GetAsString: TJSONStringType;
begin
Result:=IntToStr(FValue);
end;
procedure TJSONQWordNumber.SetAsString(const AValue: TJSONStringType);
begin
FValue:=StrToQWord(AValue);
end;
function TJSONQWordNumber.GetValue: variant;
begin
Result:=FValue;
end;
procedure TJSONQWordNumber.SetValue(const AValue: variant);
begin
FValue:=AValue;
end;
constructor TJSONQWordNumber.Create(AValue: QWord);
begin
FValue := AValue;
end;
class function TJSONQWordNumber.NumberType: TJSONNumberType;
begin
Result:=ntQWord;
end;
procedure TJSONQWordNumber.Clear;
begin
FValue:=0;
end;
function TJSONQWordNumber.Clone: TJSONData;
begin
Result:=TJSONQWordNumberClass(ClassType).Create(Self.FValue);
end;
constructor TJSONObjectEnumerator.Create(AData: TJSONObject);
begin
FData:=AData;
FCurrent:=-1;
end;
function TJSONObjectEnumerator.GetCurrent: TJSONEnum;
begin
Result.KeyNum:=FCurrent;
Result.Key:=FData.Names[FCurrent];
Result.Value:=FData.Items[FCurrent];
end;
function TJSONObjectEnumerator.MoveNext: Boolean;
begin