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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Visitor.MapBased;
interface
uses
Collection.List,
Collection.Map,
Memory.Pointer,
Text,
Visitor;
type
TMapBasedVisitor = class(TVisitor)
protected
class function GetClasses(): TList<TClass>; virtual; abstract;
class function ConstructMethodAddressMap(Prefix: TText; Suffix: TText): TMap<TClass, TPointer>;
public
class procedure RegisterClasses(); virtual; abstract;
class procedure UnregisterClasses(); virtual; abstract;
end;
implementation
uses
Collection.Map.Hash,
Object_.Class_.Comparator,
Object_.Class_.HashFunction;
{ TMapBasedVisitor }
class function TMapBasedVisitor.ConstructMethodAddressMap(Prefix: TText; Suffix: TText): TMap<TClass, TPointer>;
var
Class_: TClass;
ClassName: TText;
MethodName: TText;
Address: TPointer;
Classes: TList<TClass>;
begin
RegisterClasses();
Classes := GetClasses();
Result := THashMap<TClass, TPointer>.Create(TClassHashFunction.Instance, Classes.Count);
Result.KeyComparator := TClassComparator.Instance;
for Class_ in Classes do
begin
ClassName := Class_.ClassName;
MethodName := Prefix + ClassName.SubTextFrom(1) + Suffix;
Address := MethodAddress(MethodName);
if Address = nil then
raise EVisitorFunctionNotFound.Create('Cannot find visitor function for ' + Class_.ClassName);
Result[Class_] := Address;
end;
end;
end.
|