Table Of ContentDesign Patterns
with examples in C#
Author D
Паттерны
проектирования
с примерами на языке C#
Автор D
2012
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Оглавление
Вступление ................................................................................................................... 9
Порождающие шаблоны проектирования .............................................................. 11
Использование ................................................................................................................................................. 11
Перечень порождающих шаблонов ............................................................................................................... 11
Абстрактная фабрика — Абстрактная фабрика ....................................................................................... 13
Цель ................................................................................................................................................................... 13
Плюсы................................................................................................................................................................ 13
Минусы ............................................................................................................................................................. 13
Применимость .................................................................................................................................................. 13
Структура .......................................................................................................................................................... 14
Пример реализации ......................................................................................................................................... 14
Builder — Строитель ................................................................................................................................. 17
Цель ................................................................................................................................................................... 17
Плюсы................................................................................................................................................................ 17
Применение ..................................................................................................................................................... 17
Структура .......................................................................................................................................................... 17
Пример реализации ......................................................................................................................................... 18
Factory method — Фабричный метод ...................................................................................................... 20
Цель ................................................................................................................................................................... 20
Структура .......................................................................................................................................................... 20
Плюсы................................................................................................................................................................ 21
Минусы ............................................................................................................................................................. 21
Пример реализации ......................................................................................................................................... 22
Lazy initialization — Ленивая инициализация .......................................................................................... 23
Достоинства ...................................................................................................................................................... 23
Недостатки ........................................................................................................................................................ 23
Пример реализации ......................................................................................................................................... 23
Object pool — Объектный пул.................................................................................................................. 25
Применение ..................................................................................................................................................... 25
Переполнение .................................................................................................................................................. 25
Примеры ........................................................................................................................................................... 25
Ловушки ............................................................................................................................................................ 25
Пример реализации ......................................................................................................................................... 25
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Prototype — Прототип ............................................................................................................................. 31
Назначение ....................................................................................................................................................... 31
Применимость .................................................................................................................................................. 31
Структура .......................................................................................................................................................... 31
Пример реализации ......................................................................................................................................... 32
Singleton — Одиночка.............................................................................................................................. 34
Цель ................................................................................................................................................................... 34
Плюсы................................................................................................................................................................ 34
Минусы ............................................................................................................................................................. 34
Применение ..................................................................................................................................................... 34
Структура .......................................................................................................................................................... 34
Пример реализации ......................................................................................................................................... 34
Double checked locking - Блокировка с двойной проверкой .................................................................... 37
Пример реализации ......................................................................................................................................... 37
Структурные шаблоны проектирования .................................................................. 38
Использование ................................................................................................................................................. 38
Перечень структурных шаблонов ................................................................................................................... 38
Front Controller — Входная точка ............................................................................................................ 40
Пример .............................................................................................................................................................. 40
Структура .......................................................................................................................................................... 40
Adapter — Адаптер .................................................................................................................................. 41
Задача ................................................................................................................................................................ 41
Способ решения ............................................................................................................................................... 41
Участники .......................................................................................................................................................... 41
Структура .......................................................................................................................................................... 41
Следствия .......................................................................................................................................................... 41
Реализация ....................................................................................................................................................... 41
Пример реализации ......................................................................................................................................... 42
Bridge — Мост .......................................................................................................................................... 43
Цель ................................................................................................................................................................... 43
Структура .......................................................................................................................................................... 43
Описание........................................................................................................................................................... 43
Использование ................................................................................................................................................. 44
Пример реализации ......................................................................................................................................... 44
Composite — Компоновщик .................................................................................................................... 47
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Цель ................................................................................................................................................................... 47
Структура .......................................................................................................................................................... 47
Пример реализации ......................................................................................................................................... 47
Decorator — Декоратор ........................................................................................................................... 50
Задача ................................................................................................................................................................ 50
Способ решения ............................................................................................................................................... 50
Участники .......................................................................................................................................................... 50
Следствия .......................................................................................................................................................... 50
Реализация ....................................................................................................................................................... 50
Замечания и комментарии .............................................................................................................................. 50
Применение шаблона ..................................................................................................................................... 51
Структура .......................................................................................................................................................... 51
Пример реализации ......................................................................................................................................... 52
Facade — Фасад ....................................................................................................................................... 54
Структура .......................................................................................................................................................... 54
Проблема .......................................................................................................................................................... 54
Решение ............................................................................................................................................................ 54
Особенности применения ............................................................................................................................... 54
Пример реализации ......................................................................................................................................... 55
Flyweight — Приспособленец .................................................................................................................. 57
Цель ................................................................................................................................................................... 57
Описание........................................................................................................................................................... 57
Сруктура ............................................................................................................................................................ 57
Пример реализации ......................................................................................................................................... 57
Proxy — Заместитель ............................................................................................................................... 60
Проблема .......................................................................................................................................................... 60
Решение ............................................................................................................................................................ 60
Структура .......................................................................................................................................................... 60
Преимущества .................................................................................................................................................. 61
Недостатки ........................................................................................................................................................ 61
Сфера применения .......................................................................................................................................... 61
Прокси и близкие к нему шаблоны ................................................................................................................ 61
Пример реализации ......................................................................................................................................... 61
Поведенческие шаблоны проектирования .............................................................. 64
Использование ................................................................................................................................................. 64
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Перечень поведенческий шаблонов .............................................................................................................. 64
Chain of responsibility — Цепочка обязанностей ...................................................................................... 65
Применение ..................................................................................................................................................... 65
Сруктура ............................................................................................................................................................ 65
Пример реализации ......................................................................................................................................... 65
Command — Команда .............................................................................................................................. 68
Цель ................................................................................................................................................................... 68
Описание........................................................................................................................................................... 68
Сруктура ............................................................................................................................................................ 68
Пример реализации ......................................................................................................................................... 68
Interpreter — Интерпретатор ................................................................................................................... 72
Проблема .......................................................................................................................................................... 72
Решение ............................................................................................................................................................ 72
Преимущества .................................................................................................................................................. 72
Недостатки ........................................................................................................................................................ 72
Пример .............................................................................................................................................................. 72
Структура .......................................................................................................................................................... 72
Пример реализации ......................................................................................................................................... 72
Iterator — Итератор ................................................................................................................................. 75
Структура .......................................................................................................................................................... 76
Пример реализации ......................................................................................................................................... 76
Mediator — Посредник ............................................................................................................................ 79
Проблема .......................................................................................................................................................... 79
Решение ............................................................................................................................................................ 79
Преимущества .................................................................................................................................................. 79
Структура .......................................................................................................................................................... 79
Описание........................................................................................................................................................... 79
Пример реализации ......................................................................................................................................... 79
Memento — Хранитель ............................................................................................................................ 82
Применение ..................................................................................................................................................... 82
Структура .......................................................................................................................................................... 82
Описание........................................................................................................................................................... 83
Пример реализации ......................................................................................................................................... 83
Observer — Наблюдатель ........................................................................................................................ 89
Назначение ....................................................................................................................................................... 89
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Структура .......................................................................................................................................................... 89
Область применения ....................................................................................................................................... 89
Пример реализации ......................................................................................................................................... 90
State — Состояние ................................................................................................................................... 92
Структура .......................................................................................................................................................... 92
Пример реализации ......................................................................................................................................... 92
Strategy — Стратегия ................................................................................................................................ 99
Задача ................................................................................................................................................................ 99
Мотивы ............................................................................................................................................................. 99
Способ решения ............................................................................................................................................... 99
Участники .......................................................................................................................................................... 99
Следствия .......................................................................................................................................................... 99
Реализация ....................................................................................................................................................... 99
Полезные сведения ....................................................................................................................................... 100
Использование ............................................................................................................................................... 100
Сруктура .......................................................................................................................................................... 100
Пример реализации ....................................................................................................................................... 100
Template — Шаблонный метод ............................................................................................................. 103
Применимость ................................................................................................................................................ 103
Участники ........................................................................................................................................................ 103
Сруктура .......................................................................................................................................................... 103
Пример реализации ....................................................................................................................................... 104
Visitor — Посетитель .............................................................................................................................. 106
Структура ........................................................................................................................................................ 106
Описание средствами псевдокода ............................................................................................................... 106
Проблема ........................................................................................................................................................ 107
Решение .......................................................................................................................................................... 107
Рекомендации ................................................................................................................................................ 107
Преимущества ................................................................................................................................................ 107
Недостатки ...................................................................................................................................................... 108
Пример реализации ....................................................................................................................................... 108
Null Object (Null object) .......................................................................................................................... 115
Мотивация ...................................................................................................................................................... 115
Описание......................................................................................................................................................... 115
Структура ........................................................................................................................................................ 115
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Реализация ..................................................................................................................................................... 116
Пример ............................................................................................................................................................ 116
Связь с другими патернами .......................................................................................................................... 116
Критика и комментарии ................................................................................................................................ 117
Пример реализации ....................................................................................................................................... 117
Слуга (Servant) ....................................................................................................................................... 118
Описание......................................................................................................................................................... 118
Структура ........................................................................................................................................................ 118
Реализаци ....................................................................................................................................................... 119
Пример реализации ....................................................................................................................................... 119
Specification (Specification) ..................................................................................................................... 121
Структура ........................................................................................................................................................ 121
Пример реализации ....................................................................................................................................... 121
Пример использования ................................................................................................................................. 122
Simple Policy ........................................................................................................................................... 124
Обзор ............................................................................................................................................................... 124
Простыми словами ........................................................................................................................................ 125
Сруктура .......................................................................................................................................................... 126
Пример реализации ....................................................................................................................................... 128
Single-serving visitor ............................................................................................................................... 138
Применение ................................................................................................................................................... 138
Пример использования ................................................................................................................................. 138
Плюси .............................................................................................................................................................. 138
Минусы ........................................................................................................................................................... 138
Пример реализации ....................................................................................................................................... 138
Об авторе ................................................................................................................. 140
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Вступление
Представляю вам мануал по паттернам проектирования с примерами на языке C#. Основной материал
взят c Википедии http://ru.wikipedia.org/wiki/Design_Patterns .
Целью создания данного мануала послужила потребность в кратком справочнике с ясными примерами на
языке C# основных паттернов проектирования.
Связаться со мной можно на моём вебсайте http://go-d.org или по мейлу [email protected] .
Если вам понравился мануал, и вы хотите отблагодарить, просто отправьте https://w.qiwi.com яйцо мне на
емейл.
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