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FluentQuery.Integers.MethodFactories.pas
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FluentQuery.Integers.MethodFactories.pas
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{****************************************************}
{ }
{ FluentQuery }
{ }
{ Copyright (C) 2013 Malcolm Groves }
{ }
{ http://www.malcolmgroves.com }
{ }
{****************************************************}
{ }
{ 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/ }
{ }
{****************************************************}
unit FluentQuery.Integers.MethodFactories;
interface
uses
FluentQuery.Core.MethodFactories, System.SysUtils;
type
TIntegerMethodFactory = class(TMethodFactory<Integer>)
public
// predicates
class function GreaterThanOrEquals(Amount : Integer): TPredicate<Integer>;
class function LessThanOrEquals(Amount : Integer): TPredicate<Integer>;
class function Equals(Amount : Integer): TPredicate<Integer>; reintroduce;
class function Even: TPredicate<Integer>;
end;
implementation
{ TIntegerMethodFactory }
class function TIntegerMethodFactory.Equals(
Amount: Integer): TPredicate<Integer>;
begin
Result := function (Value : Integer) : Boolean
begin
Result := Value = Amount;
end;
end;
class function TIntegerMethodFactory.Even: TPredicate<Integer>;
begin
Result := function (Value : Integer) : Boolean
begin
Result := Value mod 2 = 0;
end;
end;
class function TIntegerMethodFactory.GreaterThanOrEquals(
Amount: Integer): TPredicate<Integer>;
begin
Result := function (Value : Integer) : Boolean
begin
Result := Value >= Amount;
end;
end;
class function TIntegerMethodFactory.LessThanOrEquals(
Amount: Integer): TPredicate<Integer>;
begin
Result := function (Value : Integer) : Boolean
begin
Result := Value <= Amount;
end;
end;
end.