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uLkJSON.pas
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uLkJSON.pas
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{
LkJSON v1.07
06 november 2009
* Copyright (c) 2006,2007,2008,2009 Leonid Koninin
* leon_kon@users.sourceforge.net
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Leonid Koninin ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Leonid Koninin BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
changes:
v1.07 06/11/2009 * fixed a bug in js_string - thanks to Andrew G. Khodotov
* fixed error with double-slashes - thanks to anonymous user
* fixed a BOM bug in parser, thanks to jasper_dale
v1.06 13/03/2009 * fixed a bug in string parsing routine
* looked routine from the Adrian M. Jones, and get some
ideas from it; thanks a lot, Adrian!
* checked error reported by phpop and fix it in the string
routine; also, thanks for advice.
v1.05 26/01/2009 + added port to D2009 by Daniele Teti, thanx a lot! really,
i haven't the 2009 version, so i can't play with it. I was
add USE_D2009 directive below, disabled by default
* fixed two small bugs in parsing object: errors with empty
object and list; thanx to RSDN's delphi forum members
* fixed "[2229135] Value deletion is broken" tracker
issue, thanx to anonymous sender provided code for
tree version
* fixed js_string according to "[1917047] (much) faster
js_string Parse" tracker issue by Joao Inacio; a lot of
thanx, great speedup!
v1.04 05/04/2008 + a declaration of Field property moved from TlkJSONobject
to TlkJSONbase; thanx for idea to Andrey Lukyanov; this
improve objects use, look the bottom of SAMPLE2.DPR
* fixed field name in TlkJSONobject to WideString
v1.03 14/03/2008 + added a code for generating readable JSON text, sended to
me by Kusnassriyanto Saiful Bahri, thanx to him!
* from this version, library distributed with BSD
license, more pleasure for commercial programmers :)
* was rewritten internal storing of objects, repacing
hash tables with balanced trees (AA tree, by classic
author's variant). On mine machine, with enabled fastmm,
tree variant is about 30% slower in from-zero creation,
but about 50% faster in parsing; also deletion of
objects will be much faster than a hash-one.
Hashes (old-style) can be switched on by enabling
USE_HASH directive below
v1.02 14/09/2007 * fix mistypes in diffrent places; thanx for reports
to Aleksandr Fedorov and Tobias Wrede
v1.01 18/05/2007 * fix small bug in new text generation routine, check
library for leaks by fastmm4; thanx for idea and comments
for Glynn Owen
v1.00 12/05/2007 * some fixes in new code (mistypes, mistypes...)
* also many fixes by ideas of Henri Gourvest - big thanx
for him again; he send me code for thread-safe initializing
of hash table, some FPC-compatible issues (not tested by
myself) and better code for localization in latest
delphi versions; very, very big thanx!
* rewritten procedure of json text generating, with wich
work of it speeds up 4-5 times (on test) its good for
a large objects
* started a large work for making source code self-doc
(not autodoc!)
v0.99 10/05/2007 + add functions to list and object:
function getInt(idx: Integer): Integer;
function getString(idx: Integer): String;
function getWideString(idx: Integer):WideString;
function getDouble(idx: Integer): Double;
function getBoolean(idx: Integer): Boolean;
+ add overloaded functions to object:
function getDouble(nm: String): Double; overload;
function getInt(nm: String): Integer; overload;
function getString(nm: String): String; overload;
function getWideString(nm: String): WideString; overload;
function getBoolean(nm: String): Boolean; overload;
* changed storing mech of TlkJSONcustomlist descendants from
dynamic array to TList; this gives us great speedup with
lesser changes; thanx for idea to Henri Gourvest
* also reworked hashtable to work with TList, so it also
increase speed of work
v0.98 09/05/2007 * fix small bug in work with WideStrings(UTF8), thanx to
IVO GELOV to description and sources
v0.97 10/04/2007 + add capabilities to work with KOL delphi projects; for
this will define KOL variable in begin of text; of course,
in this case object TlkJSONstreamed is not compiled.
v0.96 03/30/2007 + add TlkJSONFuncEnum and method ForEach in all
TlkJSONcustomlist descendants
+ add property UseHash(r/o) to TlkJSONobject, and parameter
UseHash:Boolean to object constructors; set it to false
allow to disable using of hash-table, what can increase
speed of work in case of objects with low number of
methods(fields); [by default it is true]
+ added conditional compile directive DOTNET for use in .Net
based delphi versions; remove dot in declaration below
(thanx for idea and sample code to Tim Radford)
+ added property HashOf to TlkHashTable to allow use of
users hash functions; on enter is widestring, on exit is
cardinal (32 bit unsigned). Original HashOf renamed to
DefaultHashOf
* hash table object of TlkJSONobject wrapped by property called
HashTable
* fixed some minor bugs
v0.95 03/29/2007 + add object TlkJSONstreamed what descendant of TlkJSON and
able to load/save JSON objects from/to streams/files.
* fixed small bug in generating of unicode strings representation
v0.94 03/27/2007 + add properties NameOf and FieldByIndex to TlkJSONobject
* fix small error in parsing unicode chars
* small changes in hashing code (try to speed up)
v0.93 03/05/2007 + add overloaded functions to list and object
+ add enum type TlkJSONtypes
+ add functions: SelfType:TlkJSONtypes and
SelfTypeName: String to every TlkJSONbase child
* fix mistype 'IndefOfName' to 'IndexOfName'
* fix mistype 'IndefOfObject' to 'IndexOfObject'
v0.92 03/02/2007 + add some fix to TlkJSON.ParseText to fix bug with parsing
objects - object methods not always added properly
to hash array (thanx to Chris Matheson)
...
}
unit uLkJSON;
{$IFDEF fpc}
{$MODE objfpc}
{$H+}
{.$DEFINE HAVE_FORMATSETTING}
{$ELSE}
{$IF RTLVersion > 14.00}
{$DEFINE HAVE_FORMATSETTING}
{$IF RTLVersion > 19.00}
{$DEFINE USE_D2009}
{$IFEND}
{$IFEND}
{$ENDIF}
interface
{.$DEFINE USE_D2009}
{.$DEFINE KOL}
{.$define DOTNET}
{$DEFINE THREADSAFE}
{$DEFINE NEW_STYLE_GENERATE}
{.$DEFINE USE_HASH}
{.$DEFINE TCB_EXT}
uses windows,
SysUtils,
{$IFNDEF KOL}
classes,
{$ELSE}
kol,
{$ENDIF}
variants;
type
TlkJSONtypes = (jsBase, jsNumber, jsString, jsBoolean, jsNull,
jsList, jsObject);
{$IFDEF DOTNET}
TlkJSONdotnetclass = class
public
constructor Create;
destructor Destroy; override;
procedure AfterConstruction; virtual;
procedure BeforeDestruction; virtual;
end;
{$ENDIF DOTNET}
TlkJSONbase = class{$IFDEF DOTNET}(TlkJSONdotnetclass){$ENDIF}
protected
function GetValue: variant; virtual;
procedure SetValue(const AValue: variant); virtual;
function GetChild(idx: Integer): TlkJSONbase; virtual;
procedure SetChild(idx: Integer; const AValue: TlkJSONbase);
virtual;
function GetCount: Integer; virtual;
function GetField(AName: Variant):TlkJSONbase; virtual;
public
property Field[AName: Variant]: TlkJSONbase read GetField;
property Count: Integer read GetCount;
property Child[idx: Integer]: TlkJSONbase read GetChild write SetChild;
property Value: variant read GetValue write SetValue;
class function SelfType: TlkJSONtypes; virtual;
class function SelfTypeName: string; virtual;
end;
TlkJSONnumber = class(TlkJSONbase)
protected
FValue: extended;
function GetValue: Variant; override;
procedure SetValue(const AValue: Variant); override;
public
procedure AfterConstruction; override;
class function Generate(AValue: extended = 0): TlkJSONnumber;
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
end;
TlkJSONstring = class(TlkJSONbase)
protected
FValue: WideString;
function GetValue: Variant; override;
procedure SetValue(const AValue: Variant); override;
public
procedure AfterConstruction; override;
class function Generate(const wsValue: WideString = ''):
TlkJSONstring;
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
end;
TlkJSONboolean = class(TlkJSONbase)
protected
FValue: Boolean;
function GetValue: Variant; override;
procedure SetValue(const AValue: Variant); override;
public
procedure AfterConstruction; override;
class function Generate(AValue: Boolean = true): TlkJSONboolean;
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
end;
TlkJSONnull = class(TlkJSONbase)
protected
function GetValue: Variant; override;
function Generate: TlkJSONnull;
public
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
end;
TlkJSONFuncEnum = procedure(ElName: string; Elem: TlkJSONbase;
data: pointer; var Continue: Boolean) of object;
TlkJSONcustomlist = class(TlkJSONbase)
protected
// FValue: array of TlkJSONbase;
fList: TList;
function GetCount: Integer; override;
function GetChild(idx: Integer): TlkJSONbase; override;
procedure SetChild(idx: Integer; const AValue: TlkJSONbase);
override;
function ForEachElement(idx: Integer; var nm: string):
TlkJSONbase; virtual;
function GetField(AName: Variant):TlkJSONbase; override;
function _Add(obj: TlkJSONbase): Integer; virtual;
procedure _Delete(iIndex: Integer); virtual;
function _IndexOf(obj: TlkJSONbase): Integer; virtual;
public
procedure ForEach(fnCallBack: TlkJSONFuncEnum; pUserData:
pointer);
procedure AfterConstruction; override;
procedure BeforeDestruction; override;
function getInt(idx: Integer): Integer; virtual;
function getString(idx: Integer): string; virtual;
function getWideString(idx: Integer): WideString; virtual;
function getDouble(idx: Integer): Double; virtual;
function getBoolean(idx: Integer): Boolean; virtual;
end;
TlkJSONlist = class(TlkJSONcustomlist)
protected
public
function Add(obj: TlkJSONbase): Integer; overload;
function Add(aboolean: Boolean): Integer; overload;
function Add(nmb: double): Integer; overload;
function Add(s: string): Integer; overload;
function Add(const ws: WideString): Integer; overload;
function Add(inmb: Integer): Integer; overload;
procedure Delete(idx: Integer);
function IndexOf(obj: TlkJSONbase): Integer;
class function Generate: TlkJSONlist;
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
end;
TlkJSONobjectmethod = class(TlkJSONbase)
protected
FValue: TlkJSONbase;
FName: WideString;
procedure SetName(const AValue: WideString);
public
property ObjValue: TlkJSONbase read FValue;
procedure AfterConstruction; override;
procedure BeforeDestruction; override;
property Name: WideString read FName write SetName;
class function Generate(const aname: WideString; aobj: TlkJSONbase):
TlkJSONobjectmethod;
end;
{$IFDEF USE_HASH}
PlkHashItem = ^TlkHashItem;
TlkHashItem = packed record
hash: cardinal;
index: Integer;
end;
TlkHashFunction = function(const ws: WideString): cardinal of
object;
TlkHashTable = class
private
FParent: TObject; // TCB:parent for check chaining op.
FHashFunction: TlkHashFunction;
procedure SetHashFunction(const AValue: TlkHashFunction);
protected
a_x: array[0..255] of TList;
procedure hswap(j, k, l: Integer);
function InTable(const ws: WideString; var i, j, k: cardinal):
Boolean;
public
function counters: string;
function DefaultHashOf(const ws: WideString): cardinal;
function SimpleHashOf(const ws: WideString): cardinal;
property HashOf: TlkHashFunction read FHashFunction write
SetHashFunction;
function IndexOf(const ws: WideString): Integer;
procedure AddPair(const ws: WideString; idx: Integer);
procedure Delete(const ws: WideString);
constructor Create;
destructor Destroy; override;
end;
{$ELSE}
// implementation based on "Arne Andersson, Balanced Search Trees Made Simpler"
PlkBalNode = ^TlkBalNode;
TlkBalNode = packed record
left,right: PlkBalNode;
level: byte;
key: Integer;
nm: WideString;
end;
TlkBalTree = class
protected
fdeleted,flast,fbottom,froot: PlkBalNode;
procedure skew(var t:PlkBalNode);
procedure split(var t:PlkBalNode);
public
function counters: string;
procedure Clear;
function Insert(const ws: WideString; x: Integer): Boolean;
function Delete(const ws: WideString): Boolean;
function IndexOf(const ws: WideString): Integer;
constructor Create;
destructor Destroy; override;
end;
{$ENDIF USE_HASH}
TlkJSONobject = class(TlkJSONcustomlist)
protected
{$IFDEF USE_HASH}
ht: TlkHashTable;
{$ELSE}
ht: TlkBalTree;
{$ENDIF USE_HASH}
FUseHash: Boolean;
function GetFieldByIndex(idx: Integer): TlkJSONbase;
function GetNameOf(idx: Integer): WideString;
procedure SetFieldByIndex(idx: Integer; const AValue: TlkJSONbase);
{$IFDEF USE_HASH}
function GetHashTable: TlkHashTable;
{$ELSE}
function GetHashTable: TlkBalTree;
{$ENDIF USE_HASH}
function ForEachElement(idx: Integer; var nm: string): TlkJSONbase;
override;
function GetField(AName: Variant):TlkJSONbase; override;
public
property UseHash: Boolean read FUseHash;
{$IFDEF USE_HASH}
property HashTable: TlkHashTable read GetHashTable;
{$ELSE}
property HashTable: TlkBalTree read GetHashTable;
{$ENDIF USE_HASH}
function Add(const aname: WideString; aobj: TlkJSONbase): Integer;
overload;
function OldGetField(nm: WideString): TlkJSONbase;
procedure OldSetField(nm: WideString; const AValue: TlkJSONbase);
function Add(const aname: WideString; aboolean: Boolean): Integer; overload;
function Add(const aname: WideString; nmb: double): Integer; overload;
function Add(const aname: WideString; s: string): Integer; overload;
function Add(const aname: WideString; const ws: WideString): Integer;
overload;
function Add(const aname: WideString; inmb: Integer): Integer; overload;
procedure Delete(idx: Integer);
function IndexOfName(const aname: WideString): Integer;
function IndexOfObject(aobj: TlkJSONbase): Integer;
property Field[nm: WideString]: TlkJSONbase read OldGetField
write OldSetField; default;
constructor Create(bUseHash: Boolean = true);
destructor Destroy; override;
class function Generate(AUseHash: Boolean = true): TlkJSONobject;
class function SelfType: TlkJSONtypes; override;
class function SelfTypeName: string; override;
property FieldByIndex[idx: Integer]: TlkJSONbase read GetFieldByIndex
write SetFieldByIndex;
property NameOf[idx: Integer]: WideString read GetNameOf;
function getDouble(idx: Integer): Double; overload; override;
function getInt(idx: Integer): Integer; overload; override;
function getString(idx: Integer): string; overload; override;
function getWideString(idx: Integer): WideString; overload; override;
function getBoolean(idx: Integer): Boolean; overload; override;
function {$ifdef TCB_EXT}getDoubleFromName{$else}getDouble{$endif}
(nm: string): Double; overload;
function {$ifdef TCB_EXT}getIntFromName{$else}getInt{$endif}
(nm: string): Integer; overload;
function {$ifdef TCB_EXT}getStringFromName{$else}getString{$endif}
(nm: string): string; overload;
function {$ifdef TCB_EXT}getWideStringFromName{$else}getWideString{$endif}
(nm: string): WideString; overload;
function {$ifdef TCB_EXT}getBooleanFromName{$else}getBoolean{$endif}
(nm: string): Boolean; overload;
end;
TlkJSON = class
public
class function ParseText(const txt: string): TlkJSONbase;
class function GenerateText(obj: TlkJSONbase): string;
end;
{$IFNDEF KOL}
TlkJSONstreamed = class(TlkJSON)
class function LoadFromStream(src: TStream): TlkJSONbase;
class procedure SaveToStream(obj: TlkJSONbase; dst: TStream);
class function LoadFromFile(srcname: string): TlkJSONbase;
class procedure SaveToFile(obj: TlkJSONbase; dstname: string);
end;
{$ENDIF}
function GenerateReadableText(vObj: TlkJSONbase; var vLevel:
Integer): string;
implementation
uses math,strutils;
type
ElkIntException = class(Exception)
public
idx: Integer;
constructor Create(idx: Integer; msg: string);
end;
// author of next two functions is Kusnassriyanto Saiful Bahri
function Indent(vTab: Integer): string;
begin
result := DupeString(' ', vTab);
end;
function GenerateReadableText(vObj: TlkJSONbase; var vLevel:
Integer): string;
var
i: Integer;
vStr: string;
xs: TlkJSONstring;
begin
vLevel := vLevel + 1;
if vObj is TlkJSONObject then
begin
vStr := '';
for i := 0 to TlkJSONobject(vObj).Count - 1 do
begin
if vStr <> '' then
begin
vStr := vStr + ','#13#10;
end;
vStr := vStr + Indent(vLevel) +
GenerateReadableText(TlkJSONobject(vObj).Child[i], vLevel);
end;
if vStr <> '' then
begin
vStr := '{'#13#10 + vStr + #13#10 + Indent(vLevel - 1) + '}';
end
else
begin
vStr := '{}';
end;
result := vStr;
end
else if vObj is TlkJSONList then
begin
vStr := '';
for i := 0 to TlkJSONList(vObj).Count - 1 do
begin
if vStr <> '' then
begin
vStr := vStr + ','#13#10;
end;
vStr := vStr + Indent(vLevel) +
GenerateReadableText(TlkJSONList(vObj).Child[i], vLevel);
end;
if vStr <> '' then
begin
vStr := '['#13#10 + vStr + #13#10 + Indent(vLevel - 1) + ']';
end
else
begin
vStr := '[]';
end;
result := vStr;
end
else if vObj is TlkJSONobjectmethod then
begin
vStr := '';
xs := TlkJSONstring.Create;
try
xs.Value := TlkJSONobjectMethod(vObj).Name;
vStr := GenerateReadableText(xs, vLevel);
vLevel := vLevel - 1;
vStr := vStr + ':' + GenerateReadableText(TlkJSONbase(
TlkJSONobjectmethod(vObj).ObjValue), vLevel);
//vStr := vStr + ':' + GenerateReadableText(TlkJSONbase(vObj), vLevel);
vLevel := vLevel + 1;
result := vStr;
finally
xs.Free;
end;
end
else
begin
if vObj is TlkJSONobjectmethod then
begin
if TlkJSONobjectMethod(vObj).Name <> '' then
begin
end;
end;
result := TlkJSON.GenerateText(vObj);
end;
vLevel := vLevel - 1;
end;
// author of this routine is IVO GELOV
function code2utf(iNumber: Integer): UTF8String;
begin
if iNumber < 128 then Result := chr(iNumber)
else if iNumber < 2048 then
Result := chr((iNumber shr 6) + 192) + chr((iNumber and 63) + 128)
else if iNumber < 65536 then
Result := chr((iNumber shr 12) + 224) + chr(((iNumber shr 6) and
63) + 128) + chr((iNumber and 63) + 128)
else if iNumber < 2097152 then
Result := chr((iNumber shr 18) + 240) + chr(((iNumber shr 12) and
63) + 128) + chr(((iNumber shr 6) and 63) + 128) +
chr((iNumber and 63) + 128);
end;
{ TlkJSONbase }
function TlkJSONbase.GetChild(idx: Integer): TlkJSONbase;
begin
result := nil;
end;
function TlkJSONbase.GetCount: Integer;
begin
result := 0;
end;
function TlkJSONbase.GetField(AName: Variant):TlkJSONbase;
begin
result := self;
end;
function TlkJSONbase.GetValue: variant;
begin
result := variants.Null;
end;
class function TlkJSONbase.SelfType: TlkJSONtypes;
begin
result := jsBase;
end;
class function TlkJSONbase.SelfTypeName: string;
begin
result := 'jsBase';
end;
procedure TlkJSONbase.SetChild(idx: Integer; const AValue:
TlkJSONbase);
begin
end;
procedure TlkJSONbase.SetValue(const AValue: variant);
begin
end;
{ TlkJSONnumber }
procedure TlkJSONnumber.AfterConstruction;
begin
inherited;
FValue := 0;
end;
class function TlkJSONnumber.Generate(AValue: extended):
TlkJSONnumber;
begin
result := TlkJSONnumber.Create;
result.FValue := AValue;
end;
function TlkJSONnumber.GetValue: Variant;
begin
result := FValue;
end;
class function TlkJSONnumber.SelfType: TlkJSONtypes;
begin
result := jsNumber;
end;
class function TlkJSONnumber.SelfTypeName: string;
begin
result := 'jsNumber';
end;
procedure TlkJSONnumber.SetValue(const AValue: Variant);
begin
FValue := VarAsType(AValue, varDouble);
end;
{ TlkJSONstring }
procedure TlkJSONstring.AfterConstruction;
begin
inherited;
FValue := '';
end;
class function TlkJSONstring.Generate(const wsValue: WideString):
TlkJSONstring;
begin
result := TlkJSONstring.Create;
result.FValue := wsValue;
end;
function TlkJSONstring.GetValue: Variant;
begin
result := FValue;
end;
class function TlkJSONstring.SelfType: TlkJSONtypes;
begin
result := jsString;
end;
class function TlkJSONstring.SelfTypeName: string;
begin
result := 'jsString';
end;
procedure TlkJSONstring.SetValue(const AValue: Variant);
begin
FValue := VarToWideStr(AValue);
end;
{ TlkJSONboolean }
procedure TlkJSONboolean.AfterConstruction;
begin
FValue := false;
end;
class function TlkJSONboolean.Generate(AValue: Boolean):
TlkJSONboolean;
begin
result := TlkJSONboolean.Create;
result.Value := AValue;
end;
function TlkJSONboolean.GetValue: Variant;
begin
result := FValue;
end;
class function TlkJSONboolean.SelfType: TlkJSONtypes;
begin
Result := jsBoolean;
end;
class function TlkJSONboolean.SelfTypeName: string;
begin
Result := 'jsBoolean';
end;
procedure TlkJSONboolean.SetValue(const AValue: Variant);
begin
FValue := boolean(AValue);
end;
{ TlkJSONnull }
function TlkJSONnull.Generate: TlkJSONnull;
begin
result := TlkJSONnull.Create;
end;
function TlkJSONnull.GetValue: Variant;
begin
result := variants.Null;
end;
class function TlkJSONnull.SelfType: TlkJSONtypes;
begin
result := jsNull;
end;
class function TlkJSONnull.SelfTypeName: string;
begin
result := 'jsNull';
end;
{ TlkJSONcustomlist }
function TlkJSONcustomlist._Add(obj: TlkJSONbase): Integer;
begin
if not Assigned(obj) then
begin
result := -1;
exit;
end;
result := fList.Add(obj);
end;
procedure TlkJSONcustomlist.AfterConstruction;
begin
inherited;
fList := TList.Create;
end;
procedure TlkJSONcustomlist.BeforeDestruction;
var
i: Integer;
begin
for i := (Count - 1) downto 0 do _Delete(i);
fList.Free;
inherited;
end;
// renamed
procedure TlkJSONcustomlist._Delete(iIndex: Integer);
var
idx: Integer;
begin
if not ((iIndex < 0) or (iIndex >= Count)) then
begin
if fList.Items[iIndex] <> nil then
TlkJSONbase(fList.Items[iIndex]).Free;
idx := pred(fList.Count);
if iIndex<idx then
begin
fList.Items[iIndex] := fList.Items[idx];
fList.Delete(idx);
end
else
begin
fList.Delete(iIndex);
end;
end;
end;
function TlkJSONcustomlist.GetChild(idx: Integer): TlkJSONbase;
begin
if (idx < 0) or (idx >= Count) then
begin
result := nil;
end
else
begin
result := fList.Items[idx];
end;
end;
function TlkJSONcustomlist.GetCount: Integer;
begin
result := fList.Count;
end;
function TlkJSONcustomlist._IndexOf(obj: TlkJSONbase): Integer;
begin
result := fList.IndexOf(obj);
end;
procedure TlkJSONcustomlist.SetChild(idx: Integer; const AValue:
TlkJSONbase);
begin
if not ((idx < 0) or (idx >= Count)) then
begin
if fList.Items[idx] <> nil then
TlkJSONbase(fList.Items[idx]).Free;
fList.Items[idx] := AValue;
end;
end;
procedure TlkJSONcustomlist.ForEach(fnCallBack: TlkJSONFuncEnum;
pUserData:
pointer);
var
iCount: Integer;
IsContinue: Boolean;
anJSON: TlkJSONbase;
wsObject: string;
begin
if not assigned(fnCallBack) then exit;
IsContinue := true;
for iCount := 0 to GetCount - 1 do
begin
anJSON := ForEachElement(iCount, wsObject);
if assigned(anJSON) then
fnCallBack(wsObject, anJSON, pUserData, IsContinue);
if not IsContinue then break;
end;
end;
///---- renamed to here
function TlkJSONcustomlist.GetField(AName: Variant):TlkJSONbase;
var
index: Integer;
begin
if VarIsNumeric(AName) then
begin
index := integer(AName);
result := GetChild(index);
end
else
begin
result := inherited GetField(AName);
end;
end;
function TlkJSONcustomlist.ForEachElement(idx: Integer; var nm:
string): TlkJSONbase;
begin
nm := inttostr(idx);
result := GetChild(idx);
end;
function TlkJSONcustomlist.getDouble(idx: Integer): Double;
var
jn: TlkJSONnumber;
begin
jn := Child[idx] as TlkJSONnumber;
if not assigned(jn) then result := 0
else result := jn.Value;
end;
function TlkJSONcustomlist.getInt(idx: Integer): Integer;
var
jn: TlkJSONnumber;
begin
jn := Child[idx] as TlkJSONnumber;
if not assigned(jn) then result := 0
else result := round(int(jn.Value));
end;
function TlkJSONcustomlist.getString(idx: Integer): string;
var
js: TlkJSONstring;
begin
js := Child[idx] as TlkJSONstring;
if not assigned(js) then result := ''
else result := VarToStr(js.Value);
end;
function TlkJSONcustomlist.getWideString(idx: Integer): WideString;
var
js: TlkJSONstring;
begin
js := Child[idx] as TlkJSONstring;
if not assigned(js) then result := ''
else result := VarToWideStr(js.Value);
end;
function TlkJSONcustomlist.getBoolean(idx: Integer): Boolean;
var
jb: TlkJSONboolean;
begin
jb := Child[idx] as TlkJSONboolean;
if not assigned(jb) then result := false
else result := jb.Value;
end;
{ TlkJSONobjectmethod }
procedure TlkJSONobjectmethod.AfterConstruction;
begin
inherited;
FValue := nil;
FName := '';
end;
procedure TlkJSONobjectmethod.BeforeDestruction;
begin
FName := '';
if FValue <> nil then
begin
FValue.Free;
FValue := nil;
end;
inherited;
end;
class function TlkJSONobjectmethod.Generate(const aname: WideString;
aobj: TlkJSONbase): TlkJSONobjectmethod;
begin
result := TlkJSONobjectmethod.Create;
result.FName := aname;
result.FValue := aobj;
end;
procedure TlkJSONobjectmethod.SetName(const AValue: WideString);
begin
FName := AValue;
end;
{ TlkJSONlist }
function TlkJSONlist.Add(obj: TlkJSONbase): Integer;
begin
result := _Add(obj);
end;
function TlkJSONlist.Add(nmb: double): Integer;
begin
Result := self.Add(TlkJSONnumber.Generate(nmb));
end;
function TlkJSONlist.Add(aboolean: Boolean): Integer;
begin
Result := self.Add(TlkJSONboolean.Generate(aboolean));
end;
function TlkJSONlist.Add(inmb: Integer): Integer;
begin
Result := self.Add(TlkJSONnumber.Generate(inmb));
end;
function TlkJSONlist.Add(const ws: WideString): Integer;
begin
Result := self.Add(TlkJSONstring.Generate(ws));
end;