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unit _MetaManager; |
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interface |
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|
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uses _MetaTypes; |
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|
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type |
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TMetaManager = class |
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protected |
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FFiles: array of TResource; |
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FRoot: TExtensions; |
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FConnectionID: Integer; |
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FDataAccess: TObject; |
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function GetFileCount: Integer; |
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function GetFileById(Id: Integer): TResource; |
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private |
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public |
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constructor Create(ConnectionID: Integer; DataAccess: TObject); |
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procedure InitFile(id: Integer); |
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procedure InitFileFields(id: Integer); |
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|
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property Root: TExtensions read FRoot; |
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property FileCount: Integer read GetFileCount; |
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property FileById[Id: Integer]: TResource read GetFileById; |
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end; |
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|
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implementation |
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|
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uses |
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Classes, ConnectionManager, Access_OniArchive, TypeDefs, |
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Dialogs, SysUtils, StrUtils, DataAccess, _Extensions; |
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|
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{ TFileManager } |
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|
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constructor TMetaManager.Create(ConnectionID: Integer; DataAccess: TObject); |
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begin |
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FConnectionID := ConnectionID; |
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FDataAccess := DataAccess; |
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SetLength(FFiles, TDataAccess(DataAccess).GetFileCount); |
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FRoot := TExtensions.Create(DataAccess, ConnectionID); |
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end; |
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|
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|
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function TMetaManager.GetFileById(Id: Integer): TResource; |
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begin |
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InitFile(Id); |
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Result := FFiles[Id]; |
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end; |
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|
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function TMetaManager.GetFileCount: Integer; |
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begin |
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Result := Length(FFiles); |
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end; |
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|
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procedure TMetaManager.InitFile(id: Integer); |
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var |
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typei: Integer; |
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finfo: TFileInfo; |
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begin |
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if id < ConManager.Connection[FConnectionID].GetFileCount then |
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begin |
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if not Assigned(FFiles[id]) then |
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begin |
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finfo := ConManager.Connection[FConnectionID].GetFileInfo(id); |
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if finfo.Size > 0 then |
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begin |
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for typei := 0 to High(ResourceDescs) do |
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begin |
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if ResourceDescs[typei].ext = finfo.Extension then |
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begin |
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FFiles[id] := TResourceClass(ResourceDescs[typei].ftype).Create(FConnectionID, id); |
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Break; |
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end; |
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end; |
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if typei > High(ResourceDescs) then |
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FFiles[id] := TFile_Empty.Create(FConnectionID, id); |
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end else |
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FFiles[id] := TFile_Empty.Create(FConnectionID, id); |
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Exit; |
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end; |
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end; |
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end; |
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|
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procedure TMetaManager.InitFileFields(id: Integer); |
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begin |
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if id < ConManager.Connection[FConnectionID].GetFileCount then |
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begin |
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if not Assigned(FFiles[id]) then |
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begin |
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InitFile(id); |
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if not (FFiles[id] is TFile_Empty) then |
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FFiles[id].InitDataFields; |
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end; |
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end; |
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end; |
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|
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end. |
