This is an old revision of the document!
관련 부품을 조합해서 인스턴스 생성
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);
}
public abstract class Item {
protected String caption;
public Item(String caption) {
super();
this.caption = caption;
}
public abstract String makeHTML();
}
package factory;
public abstract class LinkItem extends Item {
protected String url;
public LinkItem(String caption, String url) {
super(caption);
this.url = url;
}
}
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);
}
}
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();
}
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);
}
}
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();
}
}
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();
}
}
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();
}
}