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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 WebSite.Module.Registration;
interface
uses
Boolean,
Collection.List,
Integer._32,
Iterator,
Text,
Thread.Lock,
WebSite.Module,
WebSite.Module.List;
type
TWebSiteModuleRegistration = class;
TWebSiteModuleRegistrationIterator = class(TIterator<TWebSiteModule>)
protected
Registration: TWebSiteModuleRegistration;
Index: TInteger32;
function GetCurrent(): TWebSiteModule; override;
public
constructor Create(Registration: TWebSiteModuleRegistration); virtual;
destructor Destroy(); override;
function IsValid(): TBoolean; override;
procedure GotoNext(); override;
end;
TWebSiteModuleRegistrationBackwardIterator = class(TIterator<TWebSiteModule>)
protected
Registration: TWebSiteModuleRegistration;
Index: TInteger32;
function GetCurrent(): TWebSiteModule; override;
public
constructor Create(Registration: TWebSiteModuleRegistration); virtual;
destructor Destroy(); override;
function IsValid(): TBoolean; override;
procedure GotoNext(); override;
end;
TWebSiteModuleRegistration = class(TObject)
protected
Modules: TList<TWebSiteModule>;
Index: TOrderedByNameWebSiteModuleList;
public
Lock: TThreadLock;
constructor Create(); virtual;
destructor Destroy(); override;
procedure Add(Module: TWebSiteModule);
procedure Insert(Module: TWebSiteModule; Position: TInteger32);
function FindWithName(Name: TText): TWebSiteModule;
function CreateIterator(): TIterator<TWebSiteModule>;
function CreateBackwardIterator(): TIterator<TWebSiteModule>;
end;
implementation
uses
Exception,
Object_.List,
Object_.Reference.Counter;
{ TWebSiteModuleRegistration }
procedure TWebSiteModuleRegistration.Add(Module: TWebSiteModule);
begin
Lock.Acquire();
try
if FindWithName(Module.GetName()) <> nil then
raise EException.Create('A module with name ''' + Module.GetName() + ''' is already present!');
Module := Module.Embellish();
Index.Add(Module);
Modules.Add(Module);
finally
Lock.Release();
end;
end;
constructor TWebSiteModuleRegistration.Create();
begin
inherited Create();
Modules := TObjectList<TWebSiteModule>.Create();
Modules.ElementManager := TReferenceCounter<TWebSiteModule>.Create();
Index := TOrderedByNameWebSiteModuleList.Create();
Lock := TThreadLock.Create();
end;
function TWebSiteModuleRegistration.CreateBackwardIterator(): TIterator<TWebSiteModule>;
begin
Result := TWebSiteModuleRegistrationBackwardIterator.Create(Self);
end;
function TWebSiteModuleRegistration.CreateIterator(): TIterator<TWebSiteModule>;
begin
Result := TWebSiteModuleRegistrationIterator.Create(Self);
end;
destructor TWebSiteModuleRegistration.Destroy();
begin
Lock.Free();
Modules.Free();
Index.Free();
inherited Destroy();
end;
function TWebSiteModuleRegistration.FindWithName(Name: TText): TWebSiteModule;
begin
Lock.Acquire();
try
Result := Index.FindWithName(Name);
finally
Lock.Release();
end;
end;
procedure TWebSiteModuleRegistration.Insert(Module: TWebSiteModule; Position: TInteger32);
begin
Lock.Acquire();
try
if FindWithName(Module.GetName()) <> nil then
raise EException.Create('A module with name ''' + Module.GetName() + ''' is already present!');
Module := Module.Embellish();
Index.Add(Module);
Modules.AddAt(Position, Module);
finally
Lock.Release();
end;
end;
{ TWebSiteModuleRegistrationIterator }
constructor TWebSiteModuleRegistrationIterator.Create(Registration: TWebSiteModuleRegistration);
begin
inherited Create();
Self.Registration := Registration;
Index := 0;
Registration.Lock.Acquire();
end;
function TWebSiteModuleRegistrationIterator.GetCurrent(): TWebSiteModule;
begin
Result := Registration.Modules[Index];
end;
destructor TWebSiteModuleRegistrationIterator.Destroy();
begin
Registration.Lock.Release();
inherited Destroy();
end;
procedure TWebSiteModuleRegistrationIterator.GotoNext();
begin
Inc(Index);
end;
function TWebSiteModuleRegistrationIterator.IsValid(): TBoolean;
begin
Result := Index < Registration.Modules.Count;
end;
{ TWebSiteModuleRegistrationBackwardIterator }
constructor TWebSiteModuleRegistrationBackwardIterator.Create(Registration: TWebSiteModuleRegistration);
begin
inherited Create();
Self.Registration := Registration;
Index := Registration.Modules.Count - 1;
Registration.Lock.Acquire();
end;
function TWebSiteModuleRegistrationBackwardIterator.GetCurrent(): TWebSiteModule;
begin
Result := Registration.Modules[Index];
end;
destructor TWebSiteModuleRegistrationBackwardIterator.Destroy();
begin
Registration.Lock.Release();
inherited Destroy();
end;
procedure TWebSiteModuleRegistrationBackwardIterator.GotoNext();
begin
Dec(Index);
end;
function TWebSiteModuleRegistrationBackwardIterator.IsValid(): TBoolean;
begin
Result := (Index >= 0) and (Index < Registration.Modules.Count);
end;
end.
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