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| unit BCParsers;
interface
uses SysUtils, Classes, ContNrs, BCUtils, DateUtils, StrUtils;
type TBcCSVParser = class; TBcSimpleDataSets = class; TBcSimpleDataSet = class;
TBcCSVParser = class(TComponent) private FDataSets: TBcSimpleDataSets; FFieldSeparator: String; protected procedure SetDataSets(Value: TBcSimpleDataSets); public constructor Create(AOwner: TComponent); override; destructor Destroy; override; procedure ParseStrings(Strings: TStrings); procedure LoadFromStream(Stream: TStream); procedure LoadFromFile(const FileName: String); procedure BuildStrings(Strings: TStrings); procedure SaveToStream(Stream: TStream); procedure SaveToFile(const FileName: String); property DataSets: TBcSimpleDataSets read FDataSets write SetDataSets; published property FieldSeparator: String read FFieldSeparator write FFieldSeparator; end;
TBcSimpleDataSets = class(TObjectList) protected procedure SetItem(Index: Integer; Value: TBcSimpleDataSet); function GetItem(Index: Integer):TBcSimpleDataSet; public function Add:Integer; property Items[Index: Integer]: TBcSimpleDataSet read GetItem write SetItem; default; end;
TBcSimpleDataSet = class(TPersistent) private FFields: TStrings; protected procedure SetFields(Value: TStrings); public constructor Create; destructor Destroy; override; property Fields: TStrings read FFields write SetFields; end;
implementation
constructor TBcCSVParser.Create(AOwner: TComponent); begin inherited Create(AOwner); FDataSets := TBcSimpleDataSets.Create; FFieldSeparator := ';'; end;
destructor TBcCSVParser.Destroy; begin FDataSets.Free; inherited Destroy; end;
procedure TBcCSVParser.SetDataSets(Value: TBcSimpleDataSets); begin FDataSets := Value; end;
procedure TBcCSVParser.ParseStrings(Strings: TStrings); var iLine: Integer; CurrentLine: String; begin DataSets.Clear;
for iLine := 0 to Strings.Count -1 do begin CurrentLine := Trim(Strings[iLine]); if (pos('#', CurrentLine) = 0) and (CurrentLine <> '') then DataSets[DataSets.Add].Fields.Text := StringReplace(CurrentLine, FFieldSeparator, sLineBreak, [rfReplaceAll]); end; end;
procedure TBcCSVParser.LoadFromStream(Stream: TStream); var Data: TStrings; begin Data := TStringList.Create; try Data.LoadFromStream(Stream); ParseStrings(Data); finally Data.Free; end; end;
procedure TBcCSVParser.LoadFromFile(const FileName: string); var Data: TStrings; begin Data := TStringList.Create; try Data.LoadFromFile(FileName); ParseStrings(Data); finally Data.Free; end; end;
procedure TBcCSVParser.BuildStrings(Strings: TStrings); var iDataSet: Integer; begin Strings.Clear;
for iDataSet := 0 to DataSets.Count -1 do Strings.Add(StringReplace(DataSets[iDataSet].Fields.Text, sLineBreak, FFieldSeparator, [rfReplaceAll])); end;
procedure TBcCSVParser.SaveToStream(Stream: TStream); var Data: TStrings; begin Data := TStringList.Create; try BuildStrings(Data); Data.SaveToStream(Stream); finally Data.Free; end; end;
procedure TBcCSVParser.SaveToFile(const FileName: string); var Data: TStrings; begin Data := TStringList.Create; try BuildStrings(Data); Data.SaveToFile(FileName); finally Data.Free; end; end;
procedure TBcSimpleDataSets.SetItem(Index: Integer; Value: TBcSimpleDataSet); begin inherited Items[Index] := Value; end;
function TBcSimpleDataSets.GetItem(Index: Integer):TBcSimpleDataSet; begin Result := inherited Items[Index] as TBcSimpleDataSet; end;
function TBcSimpleDataSets.Add:Integer; var NewDataSet: TBcSimpleDataSet; begin NewDataSet := TBcSimpleDataSet.Create; Result := inherited Add(NewDataSet); end;
constructor TBcSimpleDataSet.Create; begin inherited Create; FFields := TStringList.Create; end;
destructor TBcSimpleDataSet.Destroy; begin FFields.Free; inherited Destroy; end;
procedure TBcSimpleDataSet.SetFields(Value: TStrings); begin FFields.Assign(Value); end; |