68 lines
1.7 KiB
ObjectPascal
68 lines
1.7 KiB
ObjectPascal
unit commandcol;
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{$mode ObjFPC}{$H+}
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interface
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uses
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Classes, SysUtils,Contnrs,baseconnection;
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type
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{ TCommandCollection }
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TCommandCollection=Class;
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TCommandCollection=Class(TClassList)
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private
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class var fCollection: TCommandCollection;
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public
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class procedure Register(ACommand: TCommandClass);
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class function Find(Action,SubClass: string): TCommandClass;
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class procedure Init;
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class procedure Done;
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end;
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implementation
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{ TCommandCollection }
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class procedure TCommandCollection.Register(ACommand: TCommandClass);
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begin
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if not assigned(fCollection) then
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Init;
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fCollection.Add(ACommand);
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end;
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class function TCommandCollection.Find(Action, SubClass: string): TCommandClass;
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var
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i: integer;
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begin
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for i := 0 to fCollection.Count-1 do
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if fCollection.Items[i].InheritsFrom(TCommand) and SameText(Action, TCommandClass(fCollection.Items[i]).CommandName) and SameText(SubClass, TCommandClass(fCollection.Items[i]).CommandSubClass) then
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begin
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result := TCommandClass(fCollection.Items[i]) ;
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exit;
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end;
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for i := 0 to fCollection.Count-1 do
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if fCollection.Items[i].InheritsFrom(TCommand) and SameText(Action, TCommandClass(fCollection.Items[i]).CommandName) and SameText('', TCommandClass(fCollection.Items[i]).CommandSubClass) then
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begin
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result := TCommandClass(fCollection.Items[i]) ;
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exit;
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end;
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result := nil;
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end;
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class procedure TCommandCollection.Init;
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begin
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if not assigned(fCollection) then
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fCollection := TCommandCollection.Create;
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end;
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class procedure TCommandCollection.Done;
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begin
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fCollection.Free;
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end;
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initialization
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TCommandCollection.Init;
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finalization
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TCommandCollection.Done;
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end.
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