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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 Collection.Map;
interface
uses
Comparator,
Enumerator,
Integer._32,
Iterator,
Projector,
Reference.Manager;
type
TMapEntry<TKey, TValue> = class(TObject)
public
Key: TKey;
Value: TValue;
constructor Create(Key: TKey; Value: TValue); virtual;
public
type
TKeyProjector = class(TProjector<TMapEntry<TKey, TValue>, TKey>)
public
function Project(const Entry: TMapEntry<TKey, TValue>): TKey; override;
end;
end;
TMap<TKey, TValue> = class(TObject)
private
FValueManager: TReferenceManager<TValue>;
FKeyManager: TReferenceManager<TKey>;
FKeyComparator: TComparator<TKey>;
procedure SetKeyManager(const Value: TReferenceManager<TKey>);
procedure SetValueManager(const Value: TReferenceManager<TValue>);
procedure SetKeyComparator(const Value: TComparator<TKey>);
protected
function GetCount(): TInteger32; virtual; abstract;
function GetValues(Key: TKey): TValue; virtual; abstract;
procedure SetValues(Key: TKey; const Value: TValue); virtual; abstract;
public
Unassigned: TValue;
constructor Create(); virtual;
destructor Destroy(); override;
procedure Clear(); virtual; abstract;
function Extract(Key: TKey): TValue; virtual; abstract;
procedure Remove(Key: TKey); virtual; abstract;
{$IF not Defined(FPC)}
function CreateIterator(): TIterator<TMapEntry<TKey, TValue>>; virtual; abstract;
function GetEnumerator(): TEnumerator<TMapEntry<TKey, TValue>>; virtual;
{$ENDIF}
property Count: TInteger32 read GetCount;
property Values[Key: TKey]: TValue read GetValues write SetValues; default;
property KeyManager: TReferenceManager<TKey> read FKeyManager write SetKeyManager;
property ValueManager: TReferenceManager<TValue> read FValueManager write SetValueManager;
property KeyComparator: TComparator<TKey> read FKeyComparator write SetKeyComparator;
end;
implementation
uses
Enumerator.Iterator,
Reference.User;
{ TMapEntry<TKey, TValue> }
constructor TMapEntry<TKey, TValue>.Create(Key: TKey; Value: TValue);
begin
inherited Create();
Self.Key := Key;
Self.Value := Value;
end;
{ TMap<TKey, TValue> }
constructor TMap<TKey, TValue>.Create();
begin
inherited Create();
KeyManager := TReferenceUser<TKey>.Create();
ValueManager := TReferenceUser<TValue>.Create();
end;
destructor TMap<TKey, TValue>.Destroy();
begin
KeyManager.Free();
ValueManager.Free();
KeyComparator.ReleaseReference();
inherited Destroy();
end;
function TMap<TKey, TValue>.GetEnumerator(): TEnumerator<TMapEntry<TKey, TValue>>;
begin
Result := TIteratorEnumerator<TMapEntry<TKey, TValue>>.Create(CreateIterator());
end;
procedure TMap<TKey, TValue>.SetKeyComparator(const Value: TComparator<TKey>);
begin
if Value <> KeyComparator then
begin
Value.AddReference();
KeyComparator.ReleaseReference();
FKeyComparator := Value;
end;
end;
procedure TMap<TKey, TValue>.SetKeyManager(const Value: TReferenceManager<TKey>);
begin
if Value <> KeyManager then
begin
KeyManager.Free();
FKeyManager := Value;
end;
end;
procedure TMap<TKey, TValue>.SetValueManager(const Value: TReferenceManager<TValue>);
begin
if Value <> ValueManager then
begin
ValueManager.Free();
FValueManager := Value;
end;
end;
{ TMapEntry<TKey, TValue>.TKeyProjector }
function TMapEntry<TKey, TValue>.TKeyProjector.Project(const Entry: TMapEntry<TKey, TValue>): TKey;
begin
Result := Entry.Key;
end;
end.
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