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tony |
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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{************************************************************************}
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unit IBBatchMove;
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interface
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uses Windows, SysUtils, Graphics, Classes, Controls, Db, StdVCL,
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IB, IBCustomDataSet, IBDatabase, IBTable;
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type
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TBatchMode = (batAppend, batUpdate, batAppendUpdate, batDelete, batCopy);
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{ TBatchMove }
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TIBBatchMove = class(TComponent)
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private
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FIBLoaded: Boolean;
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FDestination: TIBTable;
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FSource: TIBCustomDataSet;
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FMode: TBatchMode;
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FAbortOnKeyViol: Boolean;
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FAbortOnProblem: Boolean;
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FTransliterate: Boolean;
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FRecordCount: Longint;
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FMovedCount: Longint;
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FKeyViolCount: Longint;
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FProblemCount: Longint;
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FChangedCount: Longint;
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FMappings: TStrings;
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FKeyViolTableName: TFileName;
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FProblemTableName: TFileName;
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FChangedTableName: TFileName;
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FCommitCount: Integer;
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procedure SetMappings(Value: TStrings);
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procedure SetSource(Value: TIBCustomDataSet);
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procedure InternalExecute (BatchMode: TBatchMode; FieldCount: Word);
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protected
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procedure Notification(AComponent: TComponent;
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Operation: TOperation); override;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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procedure Execute;
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public
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property ChangedCount: Longint read FChangedCount;
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property KeyViolCount: Longint read FKeyViolCount;
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property MovedCount: Longint read FMovedCount;
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property ProblemCount: Longint read FProblemCount;
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published
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property AbortOnKeyViol: Boolean read FAbortOnKeyViol write FAbortOnKeyViol
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default True;
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property AbortOnProblem: Boolean read FAbortOnProblem write FAbortOnProblem
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default True;
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property CommitCount: Integer read FCommitCount write FCommitCount default 0;
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property ChangedTableName: TFileName read FChangedTableName write FChangedTableName;
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property Destination: TIBTable read FDestination write FDestination;
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property KeyViolTableName: TFileName read FKeyViolTableName write FKeyViolTableName;
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property Mappings: TStrings read FMappings write SetMappings;
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property Mode: TBatchMode read FMode write FMode default batAppend;
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property ProblemTableName: TFileName read FProblemTableName write FProblemTableName;
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property RecordCount: Longint read FRecordCount write FRecordCount default 0;
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property Source: TIBCustomDataSet read FSource write SetSource;
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property Transliterate: Boolean read FTransliterate write FTransliterate
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default True;
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end;
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implementation
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uses IBIntf;
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{ TIBBatchMove }
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constructor TIBBatchMove.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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FIBLoaded := False;
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CheckIBLoaded;
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FIBLoaded := True;
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FAbortOnKeyViol := True;
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FAbortOnProblem := True;
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FTransliterate := True;
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FMappings := TStringList.Create;
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end;
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destructor TIBBatchMove.Destroy;
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begin
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if FIBLoaded then
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FMappings.Free;
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inherited Destroy;
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end;
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procedure TIBBatchMove.Execute;
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type
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TFieldMap = array of Word;
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var
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SourceActive, DestinationActive: Boolean;
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BatchMode: TBatchMode;
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I: Integer;
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FieldCount: Word;
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FieldMap: TFieldMap;
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DestName, SourceName: string;
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procedure GetMappingNames;
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var
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P: Integer;
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Mapping: string;
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begin
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Mapping := FMappings[I];
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P := Pos('=', Mapping); {MBCS OK}
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if P > 0 then
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begin
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DestName := Copy(Mapping, 1, P - 1);
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SourceName := Copy(Mapping, P + 1, 255);
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end
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else begin
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DestName := Mapping;
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SourceName := Mapping;
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end;
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end;
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begin
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if (Destination = nil) or (Source = nil) or (Destination = Source) then
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IBError(ibxeInvalidBatchMove, [nil]);
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SourceActive := Source.Active;
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DestinationActive := Destination.Active;
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FieldCount := 0;
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FieldMap := nil;
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try
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Source.DisableControls;
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Destination.DisableControls;
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Source.Open;
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Source.CheckBrowseMode;
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Source.UpdateCursorPos;
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BatchMode := FMode;
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if BatchMode = batCopy then
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begin
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Destination.Close;
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if FMappings.Count = 0 then
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Destination.FieldDefs := Source.FieldDefs
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else
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begin
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Destination.FieldDefs.Clear;
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for I := 0 to FMappings.Count - 1 do
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begin
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GetMappingNames;
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with Source.FieldDefs.Find(SourceName) do
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Destination.FieldDefs.Add(DestName, DataType, Size, Required);
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end;
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end;
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Destination.IndexDefs.Clear;
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Destination.CreateTable;
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BatchMode := batAppend;
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end;
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Destination.Open;
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Destination.CheckBrowseMode;
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if FMappings.Count <> 0 then
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begin
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FieldCount := Destination.FieldDefs.Count;
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SetLength(FieldMap, FieldCount);
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for I := 0 to FMappings.Count - 1 do
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begin
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GetMappingNames;
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FieldMap[Destination.FieldDefs.Find(DestName).FieldNo-1] :=
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Source.FieldDefs.Find(SourceName).FieldNo;
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end;
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end;
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if FRecordCount > 0 then
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begin
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Source.UpdateCursorPos;
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FMovedCount := FRecordCount;
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end else
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begin
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FMovedCount := MaxLongint;
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end;
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Source.CursorPosChanged;
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try
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InternalExecute (BatchMode, FieldCount);
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finally
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if DestinationActive then Destination.First;
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end;
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finally
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if not DestinationActive then
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Destination.Close;
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if not SourceActive then
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Source.Close;
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Destination.EnableControls;
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Source.EnableControls;
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end;
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end;
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procedure TIBBatchMove.Notification(AComponent: TComponent;
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Operation: TOperation);
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begin
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inherited Notification(AComponent, Operation);
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if Operation = opRemove then
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begin
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if Destination = AComponent then
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Destination := nil;
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if Source = AComponent then
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Source := nil;
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end;
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end;
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procedure TIBBatchMove.SetMappings(Value: TStrings);
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begin
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FMappings.Assign(Value);
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end;
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procedure TIBBatchMove.SetSource(Value: TIBCustomDataSet);
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begin
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FSource := Value;
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if Value <> nil then
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Value.FreeNotification(Self);
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end;
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procedure TIBBatchMove.InternalExecute (BatchMode: TBatchMode; FieldCount: Word);
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begin
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end;
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end.
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