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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;
interface
{$SCOPEDENUMS ON}
uses
Boolean,
Comparator,
Condition,
Enumerator,
Exception,
Integer._32,
Iterator,
Object_.Base,
Reference.Manager,
Text;
type
TDuplicateMode = (Allow, Filter, Error);
ECollection = class(EException);
EDuplicate = class(ECollection);
TCollection<TElement> = class(TBaseObject)
private
FElementManager: TReferenceManager<TElement>;
procedure SetElementManager(const Value: TReferenceManager<TElement>);
protected
function GetCount(): TInteger32; virtual; abstract;
procedure SetCount(const Value: TInteger32); virtual;
function GetCapacity(): TInteger32; virtual;
procedure SetCapacity(const Value: TInteger32); virtual;
procedure AcquireElement(Element: TElement); virtual;
procedure ReleaseElement(Element: TElement); virtual;
procedure ReleaseElements(); virtual;
function GetComparator(): TComparator<TElement>; virtual; abstract;
procedure SetComparator(const Value: TComparator<TElement>); virtual; abstract;
public
Unassigned: TElement;
RejectUnassigned: TBoolean;
constructor Create(); override;
destructor Destroy(); override;
procedure BeforeDestruction(); override;
function ToText(): TText; override;
function Add(Element: TElement): TBoolean; virtual; abstract;
function Contains(Element: TElement): TBoolean; overload; virtual; abstract;
procedure Clear(); virtual; abstract;
function CreateIterator(): TIterator<TElement>; virtual; abstract;
function Extract(Element: TElement): TElement; overload; virtual; abstract;
function Extract(Condition: TCondition<TElement>): TElement; overload; virtual; abstract;
function Dequeue(): TElement; virtual; abstract;
function GetEnumerator(): TEnumerator<TElement>; virtual;
procedure AddAll(Elements: TCollection<TElement>); overload; virtual;
procedure AddAll(const Elements: array of TElement); overload; virtual;
procedure AddAll(Iterator: TIterator<TElement>); overload; virtual;
function Remove(Element: TElement): TBoolean; overload; virtual;
function Remove(Condition: TCondition<TElement>): TBoolean; overload; virtual;
procedure RemoveAll(Elements: TCollection<TElement>); virtual;
function ToArray(): TArray<TElement>; virtual;
procedure FilterFrom(Source: TCollection<TElement>; Condition: TCondition<TElement>);
function Contains(Condition: TCondition<TElement>): TBoolean; overload; virtual;
function ContainsAll(Elements: TCollection<TElement>): TBoolean; virtual;
function Find(Condition: TCondition<TElement>): TElement;
function GetMinimum(Comparator: TComparator<TElement>): TElement;
function GetMaximum(Comparator: TComparator<TElement>): TElement;
function MatchesAll(Condition: TCondition<TElement>): TBoolean;
function CountMatches(Condition: TCondition<TElement>): TInteger32;
property Count: TInteger32 read GetCount write SetCount;
property Capacity: TInteger32 read GetCapacity write SetCapacity;
property ElementManager: TReferenceManager<TElement> read FElementManager write SetElementManager;
property Comparator: TComparator<TElement> read GetComparator write SetComparator;
end;
implementation
uses
Enumerator.Iterator,
Exception.NotImplemented,
Integer._32.Positive.TextFormat,
Mathematics.Sign,
Reference.User;
{ TCollection<TElement> }
procedure TCollection<TElement>.AcquireElement(Element: TElement);
begin
if not RejectUnassigned or (Comparator.Compare(Element, Unassigned) <> sZero) then
ElementManager.Acquire(Element)
else
raise ECollection.Create('Adding unassigned value');
end;
procedure TCollection<TElement>.AddAll(Elements: TCollection<TElement>);
var
Element: TElement;
begin
for Element in Elements do
Add(Element);
end;
procedure TCollection<TElement>.AddAll(Iterator: TIterator<TElement>);
begin
while Iterator.IsValid() do
begin
Add(Iterator.Current);
Iterator.GotoNext();
end;
end;
procedure TCollection<TElement>.AddAll(const Elements: array of TElement);
var
Element: TElement;
begin
for Element in Elements do
Add(Element);
end;
procedure TCollection<TElement>.BeforeDestruction();
begin
ReleaseElements();
inherited BeforeDestruction();
end;
function TCollection<TElement>.Contains(Condition: TCondition<TElement>): TBoolean;
var
Iterator: TIterator<TElement>;
begin
Condition.AddReference();
Result := False;
Iterator := CreateIterator();
while not Result and Iterator.IsValid() do
begin
Result := Condition.Matches(Iterator.Current);
Iterator.GotoNext();
end;
Iterator.Free();
Condition.ReleaseReference();
end;
function TCollection<TElement>.ContainsAll(Elements: TCollection<TElement>): TBoolean;
var
Iterator: TIterator<TElement>;
begin
Result := True;
Iterator := Elements.CreateIterator();
while Result and Iterator.IsValid() do
begin
Result := Contains(Iterator.Current);
Iterator.GotoNext();
end;
Iterator.Free();
end;
function TCollection<TElement>.CountMatches(Condition: TCondition<TElement>): TInteger32;
var
Element: TElement;
begin
Condition.AddReference();
Result := 0;
for Element in Self do
if Condition.Matches(Element) then
Inc(Result);
Condition.ReleaseReference();
end;
constructor TCollection<TElement>.Create();
begin
inherited Create();
ElementManager := TReferenceUser<TElement>.Create();
end;
destructor TCollection<TElement>.Destroy();
begin
ElementManager.Free();
inherited Destroy();
end;
procedure TCollection<TElement>.FilterFrom(Source: TCollection<TElement>; Condition: TCondition<TElement>);
var
Element: TElement;
begin
Condition.AddReference();
for Element in Source do
if Condition.Matches(Element) then
Add(Element);
Condition.ReleaseReference();
end;
function TCollection<TElement>.Find(Condition: TCondition<TElement>): TElement;
var
Iterator: TIterator<TElement>;
begin
Condition.AddReference();
Result := Unassigned;
Iterator := CreateIterator();
while (Comparator.Compare(Result, Unassigned) = sZero) and Iterator.IsValid() do
begin
if Condition.Matches(Iterator.Current) then
Result := Iterator.Current
else
Iterator.GotoNext();
end;
Iterator.Free();
Condition.ReleaseReference();
end;
function TCollection<TElement>.GetCapacity(): TInteger32;
begin
raise ENotSupported.Create(ClassType, 'GetCapacity');
end;
function TCollection<TElement>.GetEnumerator(): TEnumerator<TElement>;
begin
Result := TIteratorEnumerator<TElement>.Create(CreateIterator());
end;
function TCollection<TElement>.GetMaximum(Comparator: TComparator<TElement>): TElement;
var
Candidate: TElement;
Iterator: TIterator<TElement>;
begin
Comparator.AddReference();
Iterator := CreateIterator();
if Iterator.IsValid then
begin
Result := Iterator.Current;
Iterator.GotoNext();
while Iterator.IsValid() do
begin
Candidate := Iterator.Current;
if Comparator.Compare(Candidate, Result) > sZero then
Result := Candidate;
Iterator.GotoNext();
end;
end
else
Result := Unassigned;
Iterator.Free();
Comparator.ReleaseReference();
end;
function TCollection<TElement>.GetMinimum(Comparator: TComparator<TElement>): TElement;
var
Candidate: TElement;
Iterator: TIterator<TElement>;
begin
Comparator.AddReference();
Iterator := CreateIterator();
if Iterator.IsValid then
begin
Result := Iterator.Current;
Iterator.GotoNext();
while Iterator.IsValid() do
begin
Candidate := Iterator.Current;
if Comparator.Compare(Candidate, Result) < sZero then
Result := Candidate;
Iterator.GotoNext();
end;
end
else
Result := Unassigned;
Iterator.Free();
Comparator.ReleaseReference();
end;
function TCollection<TElement>.MatchesAll(Condition: TCondition<TElement>): TBoolean;
var
Iterator: TIterator<TElement>;
begin
Condition.AddReference();
Iterator := CreateIterator();
Result := True;
while Result and Iterator.IsValid do
begin
Result := Condition.Matches(Iterator.Current);
Iterator.GotoNext();
end;
Iterator.Free();
Condition.ReleaseReference();
end;
procedure TCollection<TElement>.ReleaseElement(Element: TElement);
begin
ElementManager.Release(Element);
end;
procedure TCollection<TElement>.ReleaseElements();
var
Element: TElement;
begin
for Element in Self do
ReleaseElement(Element);
end;
function TCollection<TElement>.Remove(Element: TElement): TBoolean;
var
ExtractedElement: TElement;
begin
ExtractedElement := Extract(Element);
Result := Comparator.Compare(ExtractedElement, Unassigned) <> sZero;
if Result then
ReleaseElement(ExtractedElement);
end;
function TCollection<TElement>.Remove(Condition: TCondition<TElement>): TBoolean;
var
ExtractedElement: TElement;
begin
ExtractedElement := Extract(Condition);
Result := Comparator.Compare(ExtractedElement, Unassigned) <> sZero;
if Result then
ReleaseElement(ExtractedElement);
end;
procedure TCollection<TElement>.RemoveAll(Elements: TCollection<TElement>);
var
Element: TElement;
begin
for Element in Elements do
Remove(Element);
end;
procedure TCollection<TElement>.SetCapacity(const Value: TInteger32);
begin
raise ENotSupported.Create(ClassType, 'SetCapacity');
end;
procedure TCollection<TElement>.SetCount(const Value: TInteger32);
begin
raise ENotSupported.Create(ClassType, 'SetCount');
end;
procedure TCollection<TElement>.SetElementManager(const Value: TReferenceManager<TElement>);
begin
if Value <> ElementManager then
begin
FElementManager.Free();
FElementManager := Value;
end;
end;
function TCollection<TElement>.ToArray(): TArray<TElement>;
var
Index: TInteger32;
Iterator: TIterator<TElement>;
begin
SetLength(Result, Count);
Iterator := CreateIterator();
Index := 0;
while Iterator.IsValid() do
begin
Result[Index] := Iterator.Current;
Inc(Index);
Iterator.GotoNext();
end;
Iterator.Free();
end;
function TCollection<TElement>.ToText(): TText;
begin
Result := '#Elements: ' + PositiveInteger32ToText(Count);
end;
end.
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