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design_pattern:abstract_factory_pattern [2017/10/28 09:52] – ledyxdesign_pattern:abstract_factory_pattern [2021/02/07 03:24] (current) – [Abstract Factory Pattern] ledyx
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 관련 부품을 조합해서 인스턴스 생성 관련 부품을 조합해서 인스턴스 생성
   * 부품의 구체적인 구현에는 주목하지 않고, **인터페이스(API)에 주목**.   * 부품의 구체적인 구현에는 주목하지 않고, **인터페이스(API)에 주목**.
-  * 추상적인 공장(Abstract Factory)에서 추상적인 **부품**을 조립하고 추상적인 **제품**을 완성한다.+  * **추상적인 공장**(Abstract Factory)에서 **추상적인 부품**을 조립하고 **추상적인 제품**을 완성한다. 
 +    * 많은 수의 연관된 하위 클래스를 특정 그룹으로 묶어 한번에 교체.\\ ex) 특정 라이브러리 배포시 OS별로 지원하는 기능이 다를 때, OS별 기능 변경을 통합적으로 변경.
  
-{{tag>Architecture Modeling DesignPattern Creational}}+{{tag>Architecture Modeling Design_Pattern Creational}}
  
 += Factory =
 +== Abstract Factory ==
 +<sxh java>
 +package factory;
 +
 +public abstract class Factory {
 + public static Factory getFactory(String className) {
 + Factory factory = null;
 +
 + try {
 + factory = (Factory) Class.forName(className).newInstance();
 + } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
 + e.printStackTrace();
 + }
 +
 + return factory;
 + }
 +
 + public abstract LinkItem createLink(String caption, String url);
 + public abstract TrayItem createTray(String caption);
 + public abstract Page createPage(String caption, String author);
 +}
 +</sxh>
 +
 +== Abstract Products ==
 +<sxh java ; title: Template>
 +public abstract class Item {
 + protected String caption;
 +
 + public Item(String caption) {
 + super();
 + this.caption = caption;
 + }
 +
 + public abstract String makeHTML();
 +}
 +</sxh>
 +
 +
 +<sxh java ; title: Concrete, Abstract Product>
 +package factory;
 +
 +public abstract class LinkItem extends Item {
 +
 + protected String url;
 +
 + public LinkItem(String caption, String url) {
 + super(caption);
 + this.url = url;
 + }
 +}
 +</sxh>
 +
 +<sxh java ; title: Concrete, Abstruct Product>
 +package factory;
 +
 +import java.util.ArrayList;
 +
 +public abstract class TrayItem extends Item {
 +
 + protected final ArrayList<Item> tray = new ArrayList<>();
 +
 + public TrayItem(String caption) {
 + super(caption);
 + }
 +
 + public void add(Item item) {
 + tray.add(item);
 + }
 +}
 +</sxh>
 +
 +<sxh java ; title: Abstract Product>
 +package factory;
 +
 +import java.io.BufferedWriter;
 +import java.io.FileOutputStream;
 +import java.io.OutputStreamWriter;
 +import java.nio.charset.StandardCharsets;
 +import java.util.ArrayList;
 +
 +public abstract class Page {
 + protected String title;
 + protected String author;
 + protected ArrayList<Item> content = new ArrayList<>();
 +
 + public Page(String title, String author) {
 + this.title = title;
 + this.author = author;
 + }
 +
 + public void add(Item item) {
 + content.add(item);
 + }
 +
 + public void output() {
 + System.out.println(this.makeHTML());
 +
 + try (BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(title + ".html"), StandardCharsets.UTF_8))) {
 + bw.write(this.makeHTML());
 + } catch (Exception e) {
 + e.printStackTrace();
 + }
 + }
 +
 + public abstract String makeHTML();
 +}
 +</sxh>
 +
 +
 += Concrete Factories =
 +== Concrete Factory1 - ListFactory ==
 +=== Concrete Factory ===
 +<sxh java>
 +package listfactory;
 +
 +import factory.Factory;
 +import factory.LinkItem;
 +import factory.Page;
 +import factory.TrayItem;
 +
 +public class ListFactory extends Factory {
 +
 + @Override
 + public LinkItem createLink(String caption, String url) {
 + return new ListLink(caption, url);
 + }
 +
 + @Override
 + public TrayItem createTray(String caption) {
 + return new ListTray(caption);
 + }
 +
 + @Override
 + public Page createPage(String caption, String author) {
 + return new ListPage(caption, author);
 + }
 +
 +}
 +</sxh>
 +
 +
 +=== Concrete Products ===
 +
 +<sxh java>
 +package listfactory;
 +
 +import factory.LinkItem;
 +
 +public class ListLink extends LinkItem {
 +
 + public ListLink(String caption, String url) {
 + super(caption, url);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("<li>");
 + sb.append("<a href=\"");
 + sb.append(url);
 + sb.append("\">");
 + sb.append(caption);
 + sb.append("</a>");
 + sb.append("</li>\n");
 +
 + return sb.toString();
 + }
 +
 +}
 +</sxh>
 +
 +<sxh java>
 +package listfactory;
 +
 +import factory.TrayItem;
 +
 +public class ListTray extends TrayItem {
 +
 + public ListTray(String caption) {
 + super(caption);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("<li>\n");
 + sb.append(caption);
 +
 + sb.append("\n<ul>\n");
 + tray.forEach(item -> sb.append(item.makeHTML()));
 + sb.append("</ul>\n");
 +
 + sb.append("</li>");
 +
 + return sb.toString();
 + }
 +}
 +</sxh>
 +
 +<sxh java>
 +package listfactory;
 +
 +import factory.Page;
 +
 +public class ListPage extends Page {
 +
 + public ListPage(String title, String author) {
 + super(title, author);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("<html>\n");
 + sb.append("<head><title>");
 + sb.append(title);
 + sb.append("</title></head>\n");
 +
 + sb.append("<body>\n");
 +
 + sb.append("<h1>");
 + sb.append(title);
 + sb.append("</h1>");
 +
 + sb.append("<ul>\n");
 + content.forEach(item -> sb.append(item.makeHTML()));
 + sb.append("</ul>\n");
 +
 + sb.append("<hr>");
 +
 + sb.append("<footer>");
 + sb.append(author);
 + sb.append("</footer>");
 +
 + sb.append("</body>\n</html>");
 +
 + return sb.toString();
 + }
 +
 +}
 +</sxh>
 +
 +
 +== Concrete Factory2 - DivFactory ==
 +=== Concrete Factory ===
 +<sxh java>
 +package divfactory;
 +
 +import factory.Factory;
 +import factory.LinkItem;
 +import factory.Page;
 +import factory.TrayItem;
 +
 +public class DivFactory extends Factory {
 +
 + @Override
 + public LinkItem createLink(String caption, String url) {
 + return new DivLink(caption, url);
 + }
 +
 + @Override
 + public TrayItem createTray(String caption) {
 + return new DivTray(caption);
 + }
 +
 + @Override
 + public Page createPage(String caption, String author) {
 + return new DivPage(caption, author);
 + }
 +
 +}
 +</sxh>
 +
 +
 +=== Concrete Products ===
 +<sxh java>
 +package divfactory;
 +
 +import factory.LinkItem;
 +
 +public class DivLink extends LinkItem {
 +
 + public DivLink(String caption, String url) {
 + super(caption, url);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("\n<span>");
 + sb.append("<a href=\"");
 + sb.append(url);
 + sb.append("\">");
 + sb.append(caption);
 + sb.append("</a>");
 + sb.append("</span>\n");
 +
 + return sb.toString();
 + }
 +}
 +</sxh>
 +
 +<sxh java>
 +package divfactory;
 +
 +import factory.TrayItem;
 +
 +public class DivTray extends TrayItem {
 +
 + public DivTray(String caption) {
 + super(caption);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("\n<div style=\"border: 1px solid black; ; margin: 5px; padding: 5px\">");
 +
 + sb.append("\n<div>");
 + sb.append(caption);
 + sb.append("</div>\n");
 +
 + sb.append("\n<div>");
 + tray.forEach(item -> sb.append(item.makeHTML()));
 + sb.append("</div>\n");
 +
 + sb.append("</div>\n");
 + sb.append("<br>\n");
 +
 + return sb.toString();
 + }
 +
 +}
 +</sxh>
 +
 +<sxh java>
 +package divfactory;
 +
 +import factory.Page;
 +
 +public class DivPage extends Page {
 +
 + public DivPage(String title, String author) {
 + super(title, author);
 + }
 +
 + @Override
 + public String makeHTML() {
 + StringBuilder sb = new StringBuilder();
 + sb.append("<html>\n");
 + sb.append("<head><title>");
 + sb.append(title);
 + sb.append("</title></head>\n");
 +
 + sb.append("<body>\n");
 +
 + sb.append("<h1>");
 + sb.append(title);
 + sb.append("</h1>");
 +
 + sb.append("\n<div>");
 + content.forEach(item -> sb.append(item.makeHTML()));
 + sb.append("</div>\n");
 +
 + sb.append("<hr>");
 +
 + sb.append("<footer>");
 + sb.append(author);
 + sb.append("</footer>");
 +
 + sb.append("</body>\n</html>");
 +
 + return sb.toString();
 + }
 +
 +}
 +</sxh>
 +
 +
 += Client =
 +  * <fc red>Client는 구체적인 부품, 제품, 공장에 대해 모른다!</fc>
 +    * API만 이용! 말그대로 <fc red>추상적인 공장(Abstract Factory)에서 추상적인 부품을 조립하고 추상적인 제품을 완성한다.</fc>
 +
 +<sxh java ; highlight: [13]>
 +import factory.Factory;
 +import factory.LinkItem;
 +import factory.Page;
 +import factory.TrayItem;
 +
 +public class Main {
 + public static void main(String[] args) {
 + operateFactory("listfactory.ListFactory");
 + operateFactory("divfactory.DivFactory");
 + }
 +
 + private static void operateFactory(String className) {
 + Factory factory = Factory.getFactory(className);
 +
 +
 + LinkItem link_todayHumor = factory.createLink("오늘의 유머", "http://www.todayhumor.co.kr");
 + LinkItem link_ruliweb = factory.createLink("루리웹", "http://ruliweb.com/");
 +
 + TrayItem trary_community = factory.createTray("커뮤니티");
 + trary_community.add(link_todayHumor);
 + trary_community.add(link_ruliweb);
 +
 +
 + LinkItem link_google = factory.createLink("Google", "http://www.google.com");
 + LinkItem link_daum = factory.createLink("Daum", "http://www.daum.net");
 +
 + LinkItem link_naver = factory.createLink("Naver", "http://www.naver.com");
 + LinkItem link_naver_m = factory.createLink("Naver Mobile", "http://m.naver.com");
 +
 +
 + TrayItem tray_naver = factory.createTray("Naver");
 + tray_naver.add(link_naver);
 + tray_naver.add(link_naver_m);
 +
 + TrayItem tray_searchEngine = factory.createTray("검색 엔진");
 + tray_searchEngine.add(link_google);
 + tray_searchEngine.add(link_daum);
 + tray_searchEngine.add(tray_naver);
 +
 +
 + Page page = factory.createPage(className, "By ledyx");
 + page.add(trary_community);
 + page.add(tray_searchEngine);
 +
 + page.output();
 + }
 +}
 +</sxh>
 +
 +== 실행 결과 ==
 +=== Concrete Factory1 - ListFactory ===
 +
 +<sxh html>
 +<html>
 +<head><title>listfactory.ListFactory</title></head>
 +<body>
 +<h1>listfactory.ListFactory</h1><ul>
 +<li>
 +커뮤니티
 +<ul>
 +<li><a href="http://www.todayhumor.co.kr">오늘의 유머</a></li>
 +<li><a href="http://ruliweb.com/">루리웹</a></li>
 +</ul>
 +</li><li>
 +검색 엔진
 +<ul>
 +<li><a href="http://www.google.com">Google</a></li>
 +<li><a href="http://www.daum.net">Daum</a></li>
 +<li>
 +Naver
 +<ul>
 +<li><a href="http://www.naver.com">Naver</a></li>
 +<li><a href="http://m.naver.com">Naver Mobile</a></li>
 +</ul>
 +</li></ul>
 +</li></ul>
 +<hr><footer>By ledyx</footer></body>
 +</html>
 +</sxh>
 +
 +
 +
 +
 +=== Concrete Factory2 - DivFactory ===
 +
 +<sxh html>
 +<html>
 +<head><title>divfactory.DivFactory</title></head>
 +<body>
 +<h1>divfactory.DivFactory</h1>
 +<div>
 +<div style="border: 1px solid black; ; margin: 5px; padding: 5px">
 +<div>커뮤니티</div>
 +
 +<div>
 +<span><a href="http://www.todayhumor.co.kr">오늘의 유머</a></span>
 +
 +<span><a href="http://ruliweb.com/">루리웹</a></span>
 +</div>
 +</div>
 +<br>
 +
 +<div style="border: 1px solid black; ; margin: 5px; padding: 5px">
 +<div>검색 엔진</div>
 +
 +<div>
 +<span><a href="http://www.google.com">Google</a></span>
 +
 +<span><a href="http://www.daum.net">Daum</a></span>
 +
 +<div style="border: 1px solid black; ; margin: 5px; padding: 5px">
 +<div>Naver</div>
 +
 +<div>
 +<span><a href="http://www.naver.com">Naver</a></span>
 +
 +<span><a href="http://m.naver.com">Naver Mobile</a></span>
 +</div>
 +</div>
 +<br>
 +</div>
 +</div>
 +<br>
 +</div>
 +<hr><footer>By ledyx</footer></body>
 +</html>
 +</sxh>
design_pattern/abstract_factory_pattern.1509184369.txt.gz · Last modified: (external edit)