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|
unit NVOS.JsonParser;
interface
uses System.JSON.Builders,
System.JSON.Types,
System.JSON.Writers,
System.JSON.Readers,
System.SysUtils,
System.StrUtils,
System.DateUtils,
System.Classes,
System.Rtti,
Generics.Collections;
type
TNVOSObject = class;
TOnGetTotal = procedure(ASender: TObject; AObjectsCount: integer; ATotal: double) of object;
TOnGetMostPowerful = procedure(ASender: TObject; AObject, ACode: string; AAirObjectCount: integer; AObjectValue: double) of object;
TRegistryType = (rtFederal,rtRegional);
TStatisticType = (stCategory, stSubstance, stControl);
TNVOSAirFact = class
private
FCode: integer;
FName: string;
FAnnualValue: double;
FPower: double;
public
property Code: integer read FCode write FCode;
property Name: string read FName write FName;
property AnnualValue: double read FAnnualValue write FAnnualValue;
property Power: double read FPower write FPower;
end;
TNVOSStatistic = class
private type
TCategories = record
I: integer;
II: integer;
III: integer;
IV: integer;
procedure Clear;
function Total:integer;
end;
private
FRegional: TCategories;
FFederal: TCategories;
FAirFacts: TObjectList<TNVOSAirFact>;
procedure AddFact(AirFact: TNVOSAirFact);
public
constructor Create;
destructor Destroy; override;
procedure Clear;
procedure Add(AObject: TNVOSObject);
property Federal: TCategories read FFederal write FFederal;
property Regional: TCategories read FRegional write FRegional;
property AirFacts: TObjectList<TNVOSAirFact> read FAirFacts;
end;
TNVOSProps = class
private
FCode: string;
FRegType: TRegistryType;
FCategory: byte;
FRegDate: TDateTime;
FRiskCategory: byte;
public
property Code: string read FCode write FCode;
property RegType: TRegistryType read FRegType write FRegType;
property Category: byte read FCategory write FCategory;
property RegDate: TDateTime read FRegDate write FRegDate;
property RiskCategory: byte read FRiskCategory write FRiskCategory;
end;
TNVOSAir = class
private
FObjectCount: integer;
FTotalAnnualValue: double;
FFacts: TObjectList<TNVOSAirFact>;
public
constructor Create;
destructor Destroy; override;
property ObjectCount: integer read FObjectCount write FObjectCount;
property TotalAnnualValue: double read FTotalAnnualValue write FTotalAnnualValue;
property Facts: TObjectList<TNVOSAirFact> read FFacts;
end;
TNVOSObject = class
private
FName: string;
FOrganization: string;
FRegistrationDate: TDateTime;
FAir: TNVOSAir;
FProps: TNVOSProps;
public
constructor Create;
destructor Destroy; override;
property Name: string read FName write FName;
property Organization: string read FOrganization write FOrganization;
property RegistrationDate: TDateTime read FRegistrationDate write FRegistrationDate;
property Air: TNVOSAir read FAir;
property Props: TNVOSProps read FProps;
end;
TNVOSParser = class
private type
TAirFactRec = record
Code: integer;
Name: string;
Power: double;
Annual: double;
end;
private type
TCurrentRec = record
Name: string;
Organization: string;
OrgRegDate: TDateTime;
Code: string;
RegType: TRegistryType;
Category: byte;
RegDate: TDateTime;
RiskCategory: byte;
AirObjects: integer;
AirTotalAnnual: double;
AirFacts: TArray<TAirFactRec>;
procedure Clear;
end;
private
FIterator: TJSONIterator;
FReader: TJsonTextReader;
FTextReader: TStreamReader;
FStatistic: TNVOSStatistic;
FFileName: string;
FOktmo: integer;
FTotal: double;
FObjects: TObjectList<TNVOSObject>;
FMostPowerfulObjectValue: double;
FCurrentRec: TCurrentRec;
FOnGetTotal: TOnGetTotal;
FOnGetMostPowerful: TOnGetMostPowerful;
function ParseRecord(): boolean;
procedure ParseAirFacts;
procedure ParseOrganization;
procedure CreateObject;
function GetObject(const ACode: string): TNVOSObject;
public
constructor Create;
destructor Destroy; override;
procedure Parse(const AOKTMO: byte = 0);
property FileName: string read FFileName write FFileName;
property Objects: TObjectList<TNVOSObject> read FObjects;
property Obj[const ACode: string]: TNVOSObject read GetObject;
property OnGetTotal: TOnGetTotal read FOnGetTotal write FOnGetTotal;
property Statistic: TNVOSStatistic read FStatistic;
property OnGetMostPowerful: TOnGetMostPowerful read FOnGetMostPowerful write FOnGetMostPowerful;
end;
implementation
uses Winapi.Windows;
const
cNestedObjects: array [0 .. 3] of string = ('Organization', 'Record', 'Facts', 'MeasureTools');
cRecordPairs: array [0 .. 5] of string = ('Code', 'RegistryType', 'RiskCategory', 'Timestamp', 'WasSigned', 'Category');
cCategoryStr: array [0 .. 3] of string = ('I', 'II', 'III', 'IV');
cFactsPairs: array [0 .. 3] of string = ('Air', 'Water', 'Waste', 'ValCo2');
cAirFactsPairs: array [0 .. 2] of string = ('ObjectCount', 'Facts', 'TotalAnnualValue');
cAirFactsArrayPairs: array [0 .. 3] of string = ('AnnualValue', 'Code', 'Name', 'Power');
cOrganizationPairs: array [0 .. 1] of string = ('Name', 'RegistrationDate');
function TimeStampToDateTime(const ATimeStamp: string): TDateTime;
var
myformat: TFormatSettings;
begin
// 2016-12-16T11:02:41.383Z
myformat.ShortDateFormat := 'yyyy-mm-dd';
myformat.ShortTimeFormat := 'Thh:mm:ss.zzzZ';
myformat.DateSeparator := '-';
myformat.TimeSeparator := ':';
Result := StrToDateTime(ATimeStamp, myformat);
end;
function StrIndex(const AStr: string; AArray: array of string): integer;
var
I: integer;
begin
Result := -1;
for I := Low(AArray) to High(AArray) do
if SameText(AStr, AArray[I]) then
Exit(I)
end;
{ TNVOSParser }
function TNVOSParser.ParseRecord: boolean;
var
AStrings: TArray<string>;
Tmp: integer;
begin
FIterator.Recurse;
while FIterator.Next do
begin
case StrIndex(FIterator.Key, cRecordPairs) of
0:
begin
AStrings := SplitString(FIterator.AsString, '-');
if (not TryStrToInt(AStrings[0], Tmp)) or ((FOktmo > 0) and (AStrings[0].ToInteger <> FOktmo)) then
begin
Result := True;
break;
end
else
FCurrentRec.Code := FIterator.AsString;
end; // 'Code'
1:
if SameText(FIterator.AsString, 'Regional') then
FCurrentRec.RegType := TRegistryType.rtRegional
else
FCurrentRec.RegType := TRegistryType.rtFederal; // 'RegistryType'
2:
FCurrentRec.RiskCategory := FIterator.AsInteger; // 'RiskCategory'
3:
FCurrentRec.RegDate := TimeStampToDateTime(FIterator.AsString); // 'Timestamp'
4:
continue; // 'WasSigned'
5:
FCurrentRec.Category := StrIndex(FIterator.AsString, cCategoryStr) + 1; // 'Category'
end;
end;
FIterator.Return;
end;
constructor TNVOSParser.Create;
begin
inherited;
FObjects := TObjectList<TNVOSObject>.Create;
FStatistic := TNVOSStatistic.Create;
end;
procedure TNVOSParser.CreateObject;
var
I: integer;
begin
FObjects.Add(TNVOSObject.Create);
with FObjects.Last do
begin
Name := FCurrentRec.Name;
Organization := FCurrentRec.Organization;
FRegistrationDate := FCurrentRec.OrgRegDate;
with Props do
begin
Code := FCurrentRec.Code;
RegType := FCurrentRec.RegType;
Category := FCurrentRec.Category;
RegDate := FCurrentRec.RegDate;
RiskCategory := FCurrentRec.RiskCategory;
end;
Air.ObjectCount := FCurrentRec.AirObjects;
Air.TotalAnnualValue := FCurrentRec.AirTotalAnnual;
for I := Low(FCurrentRec.AirFacts) to High(FCurrentRec.AirFacts) do
begin
Air.Facts.Add(TNVOSAirFact.Create);
with Air.Facts.Last do
begin
Code := FCurrentRec.AirFacts[I].Code;
Name := FCurrentRec.AirFacts[I].Name;
AnnualValue := FCurrentRec.AirFacts[I].Annual;
Power := FCurrentRec.AirFacts[I].Power;
end;
end;
end;
FCurrentRec.Clear;
FStatistic.Add(FObjects.Last);
if Assigned(FOnGetTotal) then
FOnGetTotal(self, FObjects.Count, FTotal);
end;
destructor TNVOSParser.Destroy;
begin
FreeAndNil(FStatistic);
FreeAndNil(FObjects);
inherited;
end;
function TNVOSParser.GetObject(const ACode: string): TNVOSObject;
var
AObj: TNVOSObject;
begin
AObj := nil;
for AObj in FObjects do
if AObj.Props.Code = ACode then
Exit(AObj);
end;
procedure TNVOSParser.Parse(const AOKTMO: byte = 0);
var
IsFalse: boolean;
begin
FOktmo := AOKTMO;
FTotal := 0;
FMostPowerfulObjectValue := 0;
FStatistic.Clear;
FTextReader := nil;
FReader := nil;
FIterator := nil;
FObjects.Clear;
FTextReader := TStreamReader.Create(FFileName, TEncoding.UTF8, True);
FReader := TJsonTextReader.Create(FTextReader);
FIterator := TJSONIterator.Create(FReader);
try
// äâèãàåìñÿ ïî ìàññèâó îáúåêòîâ
while FIterator.Next() do
begin
if FIterator.Recurse then
begin
IsFalse := False;
// íàõîäèìñÿ âíóòðè çàïèñè îáúåêòà
while FIterator.Next do
begin
if IsFalse then
begin
FCurrentRec.Clear;
break;
end;
if FIterator.&Type = TJsonToken.StartObject then
begin
case StrIndex(FIterator.Key, cNestedObjects) of
0:
ParseOrganization; // 'Organization'
1:
IsFalse := ParseRecord; // 'Record'
2:
ParseAirFacts; // 'Facts'
3:
break; // 'MeasureTools'
end;
end
else
if FIterator.Key = 'Name' then
FCurrentRec.Name := FIterator.AsString;
end;
FIterator.Return;
end;
if not IsFalse then
CreateObject;
FIterator.Return;
end;
finally
FreeAndNil(FIterator);
FreeAndNil(FReader);
FreeAndNil(FTextReader);
end;
end;
procedure TNVOSParser.ParseAirFacts;
var
AirFactRec: TAirFactRec;
begin
FIterator.Recurse;
FIterator.Next('Air');
FIterator.Recurse;
while FIterator.Next do
begin
case StrIndex(FIterator.Key, cAirFactsPairs) of
0:
FCurrentRec.AirObjects := FIterator.AsInteger; // 'ObjectCount'
1:
begin
FIterator.Recurse;
while FIterator.Next() do
begin
FIterator.Recurse;
with AirFactRec do
while FIterator.Next do // ïðîõîäèì ïî îáúåêòó â ìàññèâå Air.Facts[]
begin
// ('AnnualValue','Code','Name','Power');
case StrIndex(FIterator.Key, cAirFactsArrayPairs) of
0:
Annual := FIterator.AsDouble;
1:
Code := StrToInt(FIterator.AsString);
2:
Name := FIterator.AsString;
3:
Power := FIterator.AsDouble;
end;
end;
FCurrentRec.AirFacts := FCurrentRec.AirFacts + [AirFactRec];
FIterator.Return;
end;
FIterator.Return;
end; // 'Facts'
2:
begin
FCurrentRec.AirTotalAnnual := FIterator.AsDouble;
if FCurrentRec.AirTotalAnnual > FMostPowerfulObjectValue then
begin
FMostPowerfulObjectValue := FCurrentRec.AirTotalAnnual;
if Assigned(FOnGetMostPowerful) then
FOnGetMostPowerful(self, FCurrentRec.Name, FCurrentRec.Code, FCurrentRec.AirObjects, FCurrentRec.AirTotalAnnual);
end;
FTotal := FTotal + FIterator.AsDouble;
end;
end;
end;
FIterator.Return;
FIterator.Next();
FIterator.Return;
end;
procedure TNVOSParser.ParseOrganization;
begin
FIterator.Recurse;
while FIterator.Next do
begin
case StrIndex(FIterator.Key, cOrganizationPairs) of
0:
FCurrentRec.Organization := FIterator.AsString;
1:
FCurrentRec.OrgRegDate := TimeStampToDateTime(FIterator.AsString);
end;
end;
FIterator.Return;
end;
{ TNVOSAir }
constructor TNVOSAir.Create;
begin
inherited;
FFacts := TObjectList<TNVOSAirFact>.Create;
end;
destructor TNVOSAir.Destroy;
begin
FreeAndNil(FFacts);
inherited;
end;
{ TNVOSObject }
constructor TNVOSObject.Create;
begin
inherited;
FAir := TNVOSAir.Create;
FProps := TNVOSProps.Create;
end;
destructor TNVOSObject.Destroy;
begin
FreeAndNil(FProps);
FreeAndNil(FAir);
inherited;
end;
{ TNVOSParser.TCurrentRec }
procedure TNVOSParser.TCurrentRec.Clear;
begin
Name := EmptyStr;
Organization := EmptyStr;
OrgRegDate := 0;
Code := EmptyStr;
Category := 0;
RegDate := 0;
RiskCategory := 0;
AirObjects := 0;
AirTotalAnnual := 0;
Finalize(AirFacts);
end;
{ TNVOSStatistic }
procedure TNVOSStatistic.Add(AObject: TNVOSObject);
var
AAirFact: TNVOSAirFact;
begin
case AObject.Props.RegType of
rtRegional:begin
case AObject.Props.Category of
1:inc(FRegional.I);
2:inc(FRegional.II);
3:inc(FRegional.III);
4:inc(FRegional.IV);
end;
end;
rtFederal:begin
case AObject.Props.Category of
1:inc(FFederal.I);
2:inc(FFederal.II);
3:inc(FFederal.III);
4:inc(FFederal.IV);
end;
end;
end;
for AAirFact in AObject.Air.Facts do
AddFact(AAirFact);
end;
procedure TNVOSStatistic.AddFact(AirFact: TNVOSAirFact);
function FindFact(ACode: integer): TNVOSAirFact;
var
AFact: TNVOSAirFact;
begin
Result := nil;
for AFact in FAirFacts do
if AFact.Code = ACode then
Exit(AFact)
end;
var
TmpFact: TNVOSAirFact;
begin
TmpFact := FindFact(AirFact.Code);
if not Assigned(TmpFact) then
begin
FAirFacts.Add(TNVOSAirFact.Create);
TmpFact := FAirFacts.Last;
end;
TmpFact.AnnualValue := TmpFact.AnnualValue + AirFact.AnnualValue;
TmpFact.Power := TmpFact.Power + AirFact.Power;
end;
procedure TNVOSStatistic.Clear;
begin
FAirFacts.Clear;
end;
constructor TNVOSStatistic.Create;
begin
FAirFacts := TObjectList<TNVOSAirFact>.Create;
end;
destructor TNVOSStatistic.Destroy;
begin
FreeAndNil(FAirFacts);
inherited;
end;
{ TNVOSStatistic.TCategories }
procedure TNVOSStatistic.TCategories.Clear;
begin
I:=0;
II:=0;
III:=0;
IV:=0;
end;
function TNVOSStatistic.TCategories.Total: integer;
begin
Result:=I+II+III+IV;
end;
end. |
