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BasicUIM.pas
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BasicUIM.pas
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{-------------------------------------------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
-------------------------------------------------------------------------------}
{===============================================================================
BasicUIM
Provides some very basic implementation management, namely routing of
function calls, method calls, objects and classes via variables.
Note that it was written for a specific purpose, and was never meant to be
some universal library. Threfore there is not much functionality and also
absolutely no documentation. But, I am open to suggestions, if anyone will
be interested.
Version 1.1.1 (2024-04-14)
Last change 2024-04-14
©2023-2024 František Milt
Contacts:
František Milt: frantisek.milt@gmail.com
Support:
If you find this code useful, please consider supporting its author(s) by
making a small donation using the following link(s):
https://www.paypal.me/FMilt
Changelog:
For detailed changelog and history please refer to this git repository:
github.com/TheLazyTomcat/Lib.BasicUIM
Dependencies:
* AuxExceptions - github.com/TheLazyTomcat/Lib.AuxExceptions
Library AuxExceptions is required only when rebasing local exception classes
(see symbol BasicUIM_UseAuxExceptions for details).
Indirect dependencies:
AuxTypes - github.com/TheLazyTomcat/Lib.AuxTypes
SimpleCPUID - github.com/TheLazyTomcat/Lib.SimpleCPUID
StrRect - github.com/TheLazyTomcat/Lib.StrRect
UInt64Utils - github.com/TheLazyTomcat/Lib.UInt64Utils
WinFileInfo - github.com/TheLazyTomcat/Lib.WinFileInfo
===============================================================================}
unit BasicUIM;
{
BasicUIM_UseAuxExceptions
If you want library-specific exceptions to be based on more advanced classes
provided by AuxExceptions library instead of basic Exception class, and don't
want to or cannot change code in this unit, you can define global symbol
BasicUIM_UseAuxExceptions to achieve this.
}
{$IF Defined(BasicUIM_UseAuxExceptions)}
{$DEFINE UseAuxExceptions}
{$IFEND}
//------------------------------------------------------------------------------
{$IFDEF FPC}
{$MODE ObjFpc}
{$ENDIF}
{$H+}
interface
uses
SysUtils
{$IFDEF UseAuxExceptions}, AuxExceptions{$ENDIF};
{===============================================================================
Library-specific exceptions
===============================================================================}
type
EUIMException = class({$IFDEF UseAuxExceptions}EAEGeneralException{$ELSE}Exception{$ENDIF});
EUIMIndexOutOfBounds = class(EUIMException);
EUIMInvalidValue = class(EUIMException);
EUIMDuplicateItem = class(EUIMException);
EUIMInvalidIdentifier = class(EUIMException);
{===============================================================================
Auxiliary functions - declaration
===============================================================================}
Function Method(Code,Data: Pointer): TMethod;
{===============================================================================
--------------------------------------------------------------------------------
TUIMCommonClass
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TUIMCommonClass - class declaration
===============================================================================}
type
TUIMCommonClass = class(TObject)
protected
Function GetCapacity: Integer; virtual; abstract;
procedure SetCapacity(Value: Integer); virtual; abstract;
Function GetCount: Integer; virtual; abstract;
class Function GrowDelta: Integer; virtual; abstract;
procedure Grow; virtual; // only linear growth by GrowFactor
public
Function LowIndex: Integer; virtual; abstract;
Function HighIndex: Integer; virtual; abstract;
Function CheckIndex(Index: Integer): Boolean; virtual;
property Capacity: Integer read GetCapacity write SetCapacity;
property Count: Integer read GetCount;
end;
{===============================================================================
--------------------------------------------------------------------------------
TUIMRouting
--------------------------------------------------------------------------------
===============================================================================}
type
TUIMIdentifier = type Integer;
TUIMRoutingType = (rtFunction,rtMethod,rtObject,rtClass);
TUIMImplementationFlag = (ifSelect,ifAvailable,ifSupported);
TUIMImplementationFlags = set of TUIMImplementationFlag;
TUIMImplementationType = (itFunction,itMethod,itObject,itClass,itAlias);
type
TUIMImplementation = record
ImplementationID: TUIMIdentifier;
ImplementationFlags: TUIMImplementationFlags;
case ImplementorType: TUIMImplementationType of
itFunction: (FunctionImplementor: Pointer);
itMethod: (MethodImplementor: TMethod);
itObject: (ObjectImplementor: TObject);
itClass: (ClassImplementor: TClass);
itAlias: (OriginalImplementor: TUIMIdentifier);
end;
{===============================================================================
TUIMRouting - class declaration
===============================================================================}
type
TUIMRouting = class(TUIMCommonClass)
protected
fRoutingID: TUIMIdentifier;
fRoutingType: TUIMRoutingType;
fRoutingVarAddr: Pointer;
fImplementations: array of TUIMImplementation;
fImplementationCount: Integer;
fSelectedIndex: Integer;
Function GetImplementation(Index: Integer): TUIMImplementation; virtual;
Function GetImplementationFlags(Index: Integer): TUIMImplementationFlags; virtual;
procedure SetImplementationFlags(Index: Integer; Value: TUIMImplementationFlags); virtual;
Function GetSelectedIndex: Integer; virtual;
Function GetCapacity: Integer; override;
procedure SetCapacity(Value: Integer); override;
Function GetCount: Integer; override;
class Function GrowDelta: Integer; override;
procedure Initialize(RoutingID: TUIMIdentifier; RoutingType: TUIMRoutingType; RoutingVarAddr: Pointer); virtual;
procedure Finalize; virtual;
Function Add(ImplementationID: TUIMIdentifier; ImplementorType: TUIMImplementationType; ImplementorPtr: Pointer; ImplementationFlags: TUIMImplementationFlags): Integer; overload; virtual;
Function Replace(ImplementationID: TUIMIdentifier; ImplementorType: TUIMImplementationType; ImplementorPtr: Pointer; ImplementationFlags: TUIMImplementationFlags): Integer; overload; virtual;
public
constructor Create(RoutingID: TUIMIdentifier; var FunctionVariable: Pointer); overload;
constructor Create(RoutingID: TUIMIdentifier; var MethodVariable: TMethod); overload;
constructor Create(RoutingID: TUIMIdentifier; var ObjectVariable: TObject); overload;
constructor Create(RoutingID: TUIMIdentifier; var ClassVariable: TClass); overload;
destructor Destroy; override;
Function LowIndex: Integer; override;
Function HighIndex: Integer; override;
Function IndexOf(ImplementationID: TUIMIdentifier): Integer; virtual;
Function Find(ImplementationID: TUIMIdentifier; out Index: Integer): Boolean; virtual;
Function Add(ImplementationID: TUIMIdentifier; FunctionImplementor: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Add(ImplementationID: TUIMIdentifier; MethodImplementor: TMethod; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Add(ImplementationID: TUIMIdentifier; MethodImplementorCode,MethodImplementorData: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Add(ImplementationID: TUIMIdentifier; ObjectImplementor: TObject; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Add(ImplementationID: TUIMIdentifier; ClassImplementor: TClass; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function AddAlias(ReferencedImplementationID, AliasImplementationID: TUIMIdentifier; ImplementationFlags: TUIMImplementationFlags = []): Integer; virtual;
Function Copy(SourceImplementationID, NewImplementationID: TUIMIdentifier): Integer; virtual;
Function Replace(ImplementationID: TUIMIdentifier; FunctionImplementor: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Replace(ImplementationID: TUIMIdentifier; MethodImplementor: TMethod; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Replace(ImplementationID: TUIMIdentifier; MethodImplementorCode,MethodImplementorData: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Replace(ImplementationID: TUIMIdentifier; ObjectImplementor: TObject; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Replace(ImplementationID: TUIMIdentifier; ClassImplementor: TClass; ImplementationFlags: TUIMImplementationFlags = []): Integer; overload; virtual;
Function Remove(ImplementationID: TUIMIdentifier): Integer; virtual;
procedure Delete(Index: Integer); virtual;
procedure Clear; virtual;
Function FlagsGet(ImplementationID: TUIMIdentifier): TUIMImplementationFlags; virtual;
Function FlagsSet(ImplementationID: TUIMIdentifier; ImplementationFlags: TUIMImplementationFlags): TUIMImplementationFlags; virtual;
Function FlagAdd(ImplementationID: TUIMIdentifier; ImplementationFlag: TUIMImplementationFlag): Boolean; virtual;
Function FlagRemove(ImplementationID: TUIMIdentifier; ImplementationFlag: TUIMImplementationFlag): Boolean; virtual;
Function Selected(out SelectedImplementationID: TUIMIdentifier): Boolean; overload; virtual;
Function Selected: TUIMIdentifier; overload; virtual;
Function IsSelected(ImplementationID: TUIMIdentifier): Boolean; overload; virtual;
Function SelectIndex(Index: Integer): TUIMIdentifier; virtual;
procedure Select(ImplementationID: TUIMIdentifier); virtual;
procedure InvalidateSelection; virtual;
procedure Deselect; virtual;
Function CheckRouting: Boolean; virtual;
property RoutingID: TUIMIdentifier read fRoutingID;
property RoutingType: TUIMRoutingType read fRoutingType;
property RoutingVariableAddress: Pointer read fRoutingVarAddr;
property Implementations[Index: Integer]: TUIMImplementation read GetImplementation; default;
property ImplementationsFlags[Index: Integer]: TUIMImplementationFlags read GetImplementationFlags write SetImplementationFlags;
property ImplementationCount: Integer read GetCount;
property SelectedIndex: Integer read GetSelectedIndex;
end;
{===============================================================================
--------------------------------------------------------------------------------
TImplementationManager
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TImplementationManager - class declaration
===============================================================================}
type
TImplementationManager = class(TUIMCommonClass)
protected
fRoutings: array of TUIMRouting;
fRoutingCount: Integer;
Function GetRouting(Index: Integer): TUIMRouting; virtual;
Function GetCapacity: Integer; override;
procedure SetCapacity(Value: Integer); override;
Function GetCount: Integer; override;
class Function GrowDelta: Integer; override;
procedure Initialize; virtual;
procedure Finalize; virtual;
Function Add(RoutingID: TUIMIdentifier; RoutingType: TUIMRoutingType; RoutingVarAddr: Pointer): Integer; overload; virtual;
public
constructor Create;
destructor Destroy; override;
Function LowIndex: Integer; override;
Function HighIndex: Integer; override;
Function IndexOf(RoutingID: TUIMIdentifier): Integer; virtual;
Function Find(RoutingID: TUIMIdentifier; out Index: Integer): Boolean; virtual;
Function FindObj(RoutingID: TUIMIdentifier): TUIMRouting; virtual;
Function Add(RoutingID: TUIMIdentifier; var FunctionVariable: Pointer): Integer; overload; virtual;
Function Add(RoutingID: TUIMIdentifier; var MethodVariable: TMethod): Integer; overload; virtual;
Function Add(RoutingID: TUIMIdentifier; var ObjectVariable: TObject): Integer; overload; virtual;
Function Add(RoutingID: TUIMIdentifier; var ClassVariable: TClass): Integer; overload; virtual;
Function AddObj(RoutingID: TUIMIdentifier; var FunctionVariable: Pointer): TUIMRouting; overload; virtual;
Function AddObj(RoutingID: TUIMIdentifier; var MethodVariable: TMethod): TUIMRouting; overload; virtual;
Function AddObj(RoutingID: TUIMIdentifier; var ObjectVariable: TObject): TUIMRouting; overload; virtual;
Function AddObj(RoutingID: TUIMIdentifier; var ClassVariable: TClass): TUIMRouting; overload; virtual;
Function Remove(RoutingID: TUIMIdentifier): Integer; virtual;
procedure Delete(Index: Integer); virtual;
procedure Clear; virtual;
property Routings[Index: Integer]: TUIMRouting read GetRouting; default;
property RoutingCount: Integer read GetCount;
end;
type
// some aliases
TUnitImplementationManager = TImplementationManager;
TUnitImplManager = TImplementationManager;
implementation
{===============================================================================
Auxiliary functions - implementation
===============================================================================}
Function Method(Code,Data: Pointer): TMethod;
begin
Result.Code := Code;
Result.Data := Data;
end;
//------------------------------------------------------------------------------
Function RoutToImplType(RoutingType: TUIMRoutingType): TUIMImplementationType;
begin
case RoutingType of
rtFunction: Result := itFunction;
rtMethod: Result := itMethod;
rtObject: Result := itObject;
rtClass: Result := itClass;
else
raise EUIMInvalidValue.CreateFmt('RoutToImplType: Invalid routing type (%d).',[Ord(RoutingType)]);
end;
end;
{===============================================================================
--------------------------------------------------------------------------------
TUIMCommonClass
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TUIMCommonClass - class implementation
===============================================================================}
{-------------------------------------------------------------------------------
TUIMCommonClass - protectecd methods
-------------------------------------------------------------------------------}
procedure TUIMCommonClass.Grow;
begin
If Count >= Capacity then
Capacity := Capacity + GrowDelta;
end;
{-------------------------------------------------------------------------------
TUIMCommonClass - public methods
-------------------------------------------------------------------------------}
Function TUIMCommonClass.CheckIndex(Index: Integer): Boolean;
begin
Result := (Index >= LowIndex) and (Index <= HighIndex);
end;
{===============================================================================
--------------------------------------------------------------------------------
TUIMRouting
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TUIMRouting - class implementation
===============================================================================}
{-------------------------------------------------------------------------------
TUIMRouting - protectecd methods
-------------------------------------------------------------------------------}
Function TUIMRouting.GetImplementation(Index: Integer): TUIMImplementation;
begin
If CheckIndex(Index) then
Result := fImplementations[Index]
else
raise EUIMIndexOutOfBounds.CreateFmt('TUIMRouting.GetImplementation: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.GetImplementationFlags(Index: Integer): TUIMImplementationFlags;
begin
If CheckIndex(Index) then
Result := fImplementations[Index].ImplementationFlags
else
raise EUIMIndexOutOfBounds.CreateFmt('TUIMRouting.GetImplementationFlags: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.SetImplementationFlags(Index: Integer; Value: TUIMImplementationFlags);
begin
If CheckIndex(Index) then
begin
If ifSelect in Value then
SelectIndex(Index);
fImplementations[Index].ImplementationFlags := Value - [ifSelect];
end
else raise EUIMIndexOutOfBounds.CreateFmt('TUIMRouting.SetImplementationFlags: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.GetSelectedIndex: Integer;
begin
If not CheckRouting then
fSelectedIndex := -1;
Result := fSelectedIndex;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.GetCapacity: Integer;
begin
Result := Length(fImplementations);
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.SetCapacity(Value: Integer);
begin
If Value >= 0 then
begin
// there is no need for per-item initialization or finalization
SetLength(fImplementations,Value);
If Value < fImplementationCount then
fImplementationCount := Value;
end
else raise EUIMInvalidValue.CreateFmt('TUIMRouting.SetCapacity: Invalid capacity value (%d).',[Value]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.GetCount: Integer;
begin
Result := fImplementationCount;
end;
//------------------------------------------------------------------------------
class Function TUIMRouting.GrowDelta: Integer;
begin
Result := 4;
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Initialize(RoutingID: TUIMIdentifier; RoutingType: TUIMRoutingType; RoutingVarAddr: Pointer);
begin
fRoutingID := RoutingID;
fRoutingType := RoutingType;
fRoutingVarAddr := RoutingVarAddr;
SetLength(fImplementations,0);
fImplementationCount := 0;
fSelectedIndex := -1;
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Finalize;
begin
// nothing to do atm. (do NOT deselect implementations)
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; ImplementorType: TUIMImplementationType; ImplementorPtr: Pointer; ImplementationFlags: TUIMImplementationFlags): Integer;
begin
If (RoutToImplType(fRoutingType) = ImplementorType) or (ImplementorType = itAlias) then
begin
If not Find(ImplementationID,Result) then
begin
Grow;
Result := fImplementationCount;
fImplementations[Result].ImplementationID := ImplementationID;
fImplementations[Result].ImplementationFlags := ImplementationFlags - [ifSelect];
fImplementations[Result].ImplementorType := ImplementorType;
case ImplementorType of
itFunction: fImplementations[Result].FunctionImplementor := Pointer(ImplementorPtr^);
itMethod: fImplementations[Result].MethodImplementor := TMethod(ImplementorPtr^);
itObject: fImplementations[Result].ObjectImplementor := TObject(ImplementorPtr^);
itClass: fImplementations[Result].ClassImplementor := TClass(ImplementorPtr^);
itAlias: fImplementations[Result].OriginalImplementor := TUIMIdentifier(ImplementorPtr^);
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.Add: Invalid implementor type (%d).',[Ord(ImplementorType)]);
end;
Inc(fImplementationCount);
If ifSelect in ImplementationFlags then
SelectIndex(Result);
end
else raise EUIMDuplicateItem.CreateFmt('TUIMRouting.Add: Implementation with selected id (%d) already exists.',[ImplementationID]);
end
else raise EUIMInvalidValue.CreateFmt('TUIMRouting.Add: Wrong implementor type (%d, required %d).',[Ord(ImplementorType),Ord(fRoutingType)]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; ImplementorType: TUIMImplementationType; ImplementorPtr: Pointer; ImplementationFlags: TUIMImplementationFlags): Integer;
begin
If (RoutToImplType(fRoutingType) = ImplementorType) or (ImplementorType = itAlias) then
begin
If Find(ImplementationID,Result) then
begin
fImplementations[Result].ImplementationFlags := ImplementationFlags - [ifSelect];
fImplementations[Result].ImplementorType := ImplementorType;
case ImplementorType of
itFunction: fImplementations[Result].FunctionImplementor := Pointer(ImplementorPtr^);
itMethod: fImplementations[Result].MethodImplementor := TMethod(ImplementorPtr^);
itObject: fImplementations[Result].ObjectImplementor := TObject(ImplementorPtr^);
itClass: fImplementations[Result].ClassImplementor := TClass(ImplementorPtr^);
// itAlias should not happen here, but meh...
itAlias: fImplementations[Result].OriginalImplementor := TUIMIdentifier(ImplementorPtr^);
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.Replace: Invalid implementor type (%d).',[Ord(ImplementorType)]);
end;
If (ifSelect in ImplementationFlags) or (fSelectedIndex = Result){reselct/reassign} then
SelectIndex(Result);
end
else raise EUIMDuplicateItem.CreateFmt('TUIMRouting.Replace: Implementation to be replaced (%d) not found.',[ImplementationID]);
end
else raise EUIMInvalidValue.CreateFmt('TUIMRouting.Replace: Wrong implementor type (%d, required %d).',[Ord(ImplementorType),Ord(fRoutingType)]);
end;
{-------------------------------------------------------------------------------
TUIMRouting - public methods
-------------------------------------------------------------------------------}
constructor TUIMRouting.Create(RoutingID: TUIMIdentifier; var FunctionVariable: Pointer);
begin
inherited Create;
Initialize(RoutingID,rtFunction,@FunctionVariable);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
constructor TUIMRouting.Create(RoutingID: TUIMIdentifier; var MethodVariable: TMethod);
begin
inherited Create;
Initialize(RoutingID,rtMethod,@MethodVariable);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
constructor TUIMRouting.Create(RoutingID: TUIMIdentifier; var ObjectVariable: TObject);
begin
inherited Create;
Initialize(RoutingID,rtObject,@ObjectVariable);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
constructor TUIMRouting.Create(RoutingID: TUIMIdentifier; var ClassVariable: TClass);
begin
inherited Create;
Initialize(RoutingID,rtClass,@ClassVariable);
end;
//------------------------------------------------------------------------------
destructor TUIMRouting.Destroy;
begin
Finalize;
inherited;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.LowIndex: Integer;
begin
Result := Low(fImplementations);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.HighIndex: Integer;
begin
Result := Pred(fImplementationCount);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.IndexOf(ImplementationID: TUIMIdentifier): Integer;
var
i: Integer;
begin
Result := -1;
For i := LowIndex to HighIndex do
If fImplementations[i].ImplementationID = ImplementationID then
begin
Result := i;
Break{For i};
end;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Find(ImplementationID: TUIMIdentifier; out Index: Integer): Boolean;
begin
Index := IndexOf(ImplementationID);
Result := CheckIndex(Index);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; FunctionImplementor: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Add(ImplementationID,itFunction,@FunctionImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; MethodImplementor: TMethod; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Add(ImplementationID,itMethod,@MethodImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; MethodImplementorCode,MethodImplementorData: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer;
var
MethodTemp: TMethod;
begin
MethodTemp.Code := MethodImplementorCode;
MethodTemp.Data := MethodImplementorData;
Result := Add(ImplementationID,itMethod,@MethodTemp,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; ObjectImplementor: TObject; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Add(ImplementationID,itObject,@ObjectImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Add(ImplementationID: TUIMIdentifier; ClassImplementor: TClass; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Add(ImplementationID,itClass,@ClassImplementor,ImplementationFlags);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.AddAlias(ReferencedImplementationID, AliasImplementationID: TUIMIdentifier; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Add(AliasImplementationID,itAlias,@ReferencedImplementationID,ImplementationFlags);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Copy(SourceImplementationID, NewImplementationID: TUIMIdentifier): Integer;
var
SrcIndex: Integer;
begin
If Find(SourceImplementationID,SrcIndex) then
begin
with fImplementations[SrcIndex] do
case ImplementorType of
itFunction: Result := Add(NewImplementationID,FunctionImplementor,ImplementationFlags);
itMethod: Result := Add(NewImplementationID,MethodImplementor,ImplementationFlags);
itObject: Result := Add(NewImplementationID,ObjectImplementor,ImplementationFlags);
itClass: Result := Add(NewImplementationID,ClassImplementor,ImplementationFlags);
itAlias: Result := AddAlias(OriginalImplementor,NewImplementationID,ImplementationFlags);
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.Copy: Invalid implementor type (%d).',[Ord(ImplementorType)])
end;
end
else raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.Copy: Implementation with selected ID (%d) not found.',[SourceImplementationID]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; FunctionImplementor: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Replace(ImplementationID,itFunction,@FunctionImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; MethodImplementor: TMethod; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Replace(ImplementationID,itMethod,@MethodImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; MethodImplementorCode,MethodImplementorData: Pointer; ImplementationFlags: TUIMImplementationFlags = []): Integer;
var
MethodTemp: TMethod;
begin
MethodTemp.Code := MethodImplementorCode;
MethodTemp.Data := MethodImplementorData;
Result := Replace(ImplementationID,itMethod,@MethodTemp,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; ObjectImplementor: TObject; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Replace(ImplementationID,itObject,@ObjectImplementor,ImplementationFlags);
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Replace(ImplementationID: TUIMIdentifier; ClassImplementor: TClass; ImplementationFlags: TUIMImplementationFlags = []): Integer;
begin
Result := Replace(ImplementationID,itClass,@ClassImplementor,ImplementationFlags);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Remove(ImplementationID: TUIMIdentifier): Integer;
begin
If Find(ImplementationID,Result) then
Delete(Result)
else
Result := -1;
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Delete(Index: Integer);
var
i: Integer;
begin
If CheckIndex(Index) then
begin
If fSelectedIndex = Index then
fSelectedIndex := -1;
For i := Index to Pred(HighIndex) do
begin
fImplementations[i] := fImplementations[i + 1];
If fSelectedIndex = (i + 1) then
Dec(fSelectedIndex);
end;
Dec(fImplementationCount);
end
else raise EUIMIndexOutOfBounds.CreateFmt('TUIMRouting.Delete: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Clear;
begin
SetCapacity(0);
fSelectedIndex := -1;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.FlagsGet(ImplementationID: TUIMIdentifier): TUIMImplementationFlags;
var
Index: Integer;
begin
If Find(ImplementationID,Index) then
Result := fImplementations[Index].ImplementationFlags
else
raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.FlagsGet: Implementation with selected ID (%d) not found.',[ImplementationID]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.FlagsSet(ImplementationID: TUIMIdentifier; ImplementationFlags: TUIMImplementationFlags): TUIMImplementationFlags;
var
Index: Integer;
begin
If Find(ImplementationID,Index) then
begin
Result := fImplementations[Index].ImplementationFlags;
If ifSelect in ImplementationFlags then
SelectIndex(Index);
fImplementations[Index].ImplementationFlags := ImplementationFlags - [ifSelect];
end
else raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.FlagsSet: Implementation with selected ID (%d) not found.',[ImplementationID]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.FlagAdd(ImplementationID: TUIMIdentifier; ImplementationFlag: TUIMImplementationFlag): Boolean;
var
Index: Integer;
begin
If Find(ImplementationID,Index) then
begin
Result := ImplementationFlag in fImplementations[Index].ImplementationFlags;
If ImplementationFlag = ifSelect then
SelectIndex(Index)
else
Include(fImplementations[Index].ImplementationFlags,ImplementationFlag);
end
else raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.FlagAdd: Implementation with selected ID (%d) not found.',[ImplementationID]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.FlagRemove(ImplementationID: TUIMIdentifier; ImplementationFlag: TUIMImplementationFlag): Boolean;
var
Index: Integer;
begin
If Find(ImplementationID,Index) then
begin
Result := ImplementationFlag in fImplementations[Index].ImplementationFlags;
Exclude(fImplementations[Index].ImplementationFlags,ImplementationFlag);
end
else raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.FlagRemove: Implementation with selected ID (%d) not found.',[ImplementationID]);
end;
//------------------------------------------------------------------------------
Function TUIMRouting.Selected(out SelectedImplementationID: TUIMIdentifier): Boolean;
begin
If not CheckRouting then
fSelectedIndex := -1;
If CheckIndex(fSelectedIndex) then
begin
SelectedImplementationID := fImplementations[fSelectedIndex].ImplementationID;
Result := True;
end
else Result := False;
end;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Function TUIMRouting.Selected: TUIMIdentifier;
begin
If not Selected(Result) then
Result := 0;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.IsSelected(ImplementationID: TUIMIdentifier): Boolean;
begin
If not CheckRouting then
fSelectedIndex := -1;
If CheckIndex(fSelectedIndex) then
Result := ImplementationID = fImplementations[fSelectedIndex].ImplementationID
else
Result := False;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.SelectIndex(Index: Integer): TUIMIdentifier;
begin
If CheckIndex(Index) then
begin
If fImplementations[Index].ImplementorType <> itAlias then
begin
fSelectedIndex := Index;
case fRoutingType of
rtFunction: Pointer(fRoutingVarAddr^) := fImplementations[fSelectedIndex].FunctionImplementor;
rtMethod: TMethod(fRoutingVarAddr^) := fImplementations[fSelectedIndex].MethodImplementor;
rtObject: TObject(fRoutingVarAddr^) := fImplementations[fSelectedIndex].ObjectImplementor;
rtClass: TClass(fRoutingVarAddr^) := fImplementations[fSelectedIndex].ClassImplementor;
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.SelectIndex: Invalid routing type (%d).',[Ord(fRoutingType)]);
end;
end
else Select(fImplementations[Index].OriginalImplementor);
Result := fImplementations[Index].ImplementationID;
end
else raise EUIMIndexOutOfBounds.CreateFmt('TUIMRouting.SelectIndex: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Select(ImplementationID: TUIMIdentifier);
var
Index: Integer;
begin
If Find(ImplementationID,Index) then
SelectIndex(Index)
else
raise EUIMInvalidIdentifier.CreateFmt('TUIMRouting.Select: Implementation with selected ID (%d) not found.',[ImplementationID]);
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.InvalidateSelection;
begin
fSelectedIndex := -1;
end;
//------------------------------------------------------------------------------
procedure TUIMRouting.Deselect;
begin
InvalidateSelection;
case fRoutingType of
rtFunction: Pointer(fRoutingVarAddr^) := nil;
rtMethod: begin
TMethod(fRoutingVarAddr^).Code := nil;
TMethod(fRoutingVarAddr^).Data := nil;
end;
rtObject: TObject(fRoutingVarAddr^) := TObject(nil);
rtClass: TClass(fRoutingVarAddr^) := TClass(nil);
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.Deselect: Invalid routing type (%d).',[Ord(fRoutingType)])
end;
end;
//------------------------------------------------------------------------------
Function TUIMRouting.CheckRouting: Boolean;
begin
If CheckIndex(fSelectedIndex) then
case fRoutingType of
rtFunction: Result := Pointer(fRoutingVarAddr^) = fImplementations[fSelectedIndex].FunctionImplementor;
rtMethod: Result := (TMethod(fRoutingVarAddr^).Code = fImplementations[fSelectedIndex].MethodImplementor.Code) and
(TMethod(fRoutingVarAddr^).Data = fImplementations[fSelectedIndex].MethodImplementor.Data);
rtObject: Result := TObject(fRoutingVarAddr^) = fImplementations[fSelectedIndex].ObjectImplementor;
rtClass: Result := TClass(fRoutingVarAddr^) = fImplementations[fSelectedIndex].ClassImplementor;
else
raise EUIMInvalidValue.CreateFmt('TUIMRouting.CheckRouting: Invalid routing type (%d).',[Ord(fRoutingType)])
end
else Result := True;
end;
{===============================================================================
--------------------------------------------------------------------------------
TImplementationManager
--------------------------------------------------------------------------------
===============================================================================}
{===============================================================================
TImplementationManager - class implementation
===============================================================================}
{-------------------------------------------------------------------------------
TImplementationManager - protected methods
-------------------------------------------------------------------------------}
Function TImplementationManager.GetRouting(Index: Integer): TUIMRouting;
begin
If CheckIndex(Index) then
Result := fRoutings[Index]
else
raise EUIMIndexOutOfBounds.CreateFmt('TImplementationManager.GetRouting: Index (%d) out of bounds.',[Index]);
end;
//------------------------------------------------------------------------------
Function TImplementationManager.GetCapacity: Integer;
begin
Result := Length(fRoutings);
end;
//------------------------------------------------------------------------------
procedure TImplementationManager.SetCapacity(Value: Integer);
var
i: Integer;
begin
If Value >= 0 then
begin
If Value < fRoutingCount then
begin
For i := Value to HighIndex do
FreeAndNil(fRoutings[i]);
fRoutingCount := Value;
end;
SetLength(fRoutings,Value);
end
else raise EUIMInvalidValue.CreateFmt('TImplementationManager.SetCapacity: Invalid capacity value (%d).',[Value]);
end;
//------------------------------------------------------------------------------
Function TImplementationManager.GetCount: Integer;
begin
Result := fRoutingCount;
end;
//------------------------------------------------------------------------------
class Function TImplementationManager.GrowDelta: Integer;
begin
Result := 16;
end;
//------------------------------------------------------------------------------
procedure TImplementationManager.Initialize;
begin
SetLength(fRoutings,0);
fRoutingCount := 0;
end;
//------------------------------------------------------------------------------
procedure TImplementationManager.Finalize;
begin
Clear;
end;
//------------------------------------------------------------------------------
Function TImplementationManager.Add(RoutingID: TUIMIdentifier; RoutingType: TUIMRoutingType; RoutingVarAddr: Pointer): Integer;
begin
If not Find(RoutingID,Result) then
begin
Grow;
Result := fRoutingCount;
case RoutingType of
rtFunction: fRoutings[Result] := TUIMRouting.Create(RoutingID,Pointer(RoutingVarAddr^));
rtMethod: fRoutings[Result] := TUIMRouting.Create(RoutingID,TMethod(RoutingVarAddr^));
rtObject: fRoutings[Result] := TUIMRouting.Create(RoutingID,TObject(RoutingVarAddr^));
rtClass: fRoutings[Result] := TUIMRouting.Create(RoutingID,TClass(RoutingVarAddr^));
else
raise EUIMInvalidValue.CreateFmt('TImplementationManager.Add: Invalid routing type (%d).',[Ord(RoutingType)])
end;
Inc(fRoutingCount);
end
else raise EUIMDuplicateItem.CreateFmt('TImplementationManager.Add: Routing with selected ID (%d) already exists.',[RoutingID]);
end;
{-------------------------------------------------------------------------------
TImplementationManager - public methods
-------------------------------------------------------------------------------}
constructor TImplementationManager.Create;
begin
inherited;
Initialize;
end;
//------------------------------------------------------------------------------
destructor TImplementationManager.Destroy;
begin
Finalize;
inherited;
end;
//------------------------------------------------------------------------------
Function TImplementationManager.LowIndex: Integer;
begin