[Java]Design Pattern-Abstract Factory

---

fontFamily Package

package fontFamily;

public interface FontFamily {
    public String toString();
}

package fontFamily;

public class Arial implements FontFamily{
    public String toString(){
        return "Arial";
    }
}

package fontFamily;

public class Malgun implements FontFamily{
    public String toString(){
        return "Malgun";
    }
}

---

fontSize Package

package fontSize;

public interface FontSize {
    public String toString();
}

package fontSize;

public class Small implements FontSize {
    public String toString(){
        return "12px";
    }
}

package fontSize;

public class Big implements FontSize{
    public String toString(){
        return "20px";
    }
}

---

Text

import fontFamily.*;
import fontSize.*;

public abstract class Text {
    String content;

    FontFamily fontFamily;
    FontSize fontSize;

    abstract void prepare();
    void write(){System.out.println("Writting text");}
    void send(){System.out.println("Sending text\n");}

    void setContent(String content){
        this.content=content;
    }
    String getContent(){
        return content;
    }

    public String toString(){
        StringBuffer display = new StringBuffer();
        display.append("----"+content+"----\n");
        display.append(fontFamily+"\n");
        display.append(fontSize+"\n");
        return display.toString();
    }
}

public class Hello extends Text{
    TextFactory textFactory;

    public Hello(TextFactory textFactory){this.textFactory = textFactory;}

    void prepare(){
        fontFamily=textFactory.createFontFamily();
        fontSize=textFactory.createFontSize();
    }
}

public class Bye extends Text{
    TextFactory textFactory;

    public Bye(TextFactory textFactory){this.textFactory=textFactory;}

    public void prepare(){
        fontFamily=textFactory.createFontFamily();
        fontSize=textFactory.createFontSize();
    }
}

---

TextFactory

import fontFamily.*;
import fontSize.*;

public interface TextFactory {
    public FontFamily createFontFamily();
    public FontSize createFontSize();
}

import fontFamily.*;
import fontSize.*;

public class ATextFactory implements TextFactory{
    public FontFamily createFontFamily(){return new Malgun();}
    public FontSize createFontSize(){return new Small();}
}

import fontFamily.*;
import fontSize.*;

public class BTextFactory implements TextFactory{
    public FontFamily createFontFamily(){return new Arial();}
    public FontSize createFontSize(){return new Big();}
}

---

TextStore

public abstract class TextStore {
    public abstract Text createText(String type);

    public Text orderText(String type){
        Text text = createText(type);

        System.out.println("Making a "+text.getContent()+" text card\n");

        text.prepare();
        text.write();
        text.send();

        return text;
    }
}

public class ATextStore extends TextStore{
    public Text createText(String type){
        Text text = null;
        ATextFactory aTextFactory = new ATextFactory();

        if(type.equals("Hello")){
            text = new Hello(aTextFactory);
            text.setContent("Hello");
        }else if(type.equals("Bye")){
            text = new Bye(aTextFactory);
            text.setContent("Bye");
        }

        return text;
    }
}

public class BTextStore extends TextStore{
    public Text createText(String type){
        Text text = null;
        BTextFactory bTextFactory = new BTextFactory();

        if(type.equals("Hello")){
            text = new Hello(bTextFactory);
            text.setContent("Hello");
        }else if(type.equals("Bye")){
            text = new Bye(bTextFactory);
            text.setContent("Bye");
        }

        return text;
    }
}

---

Main

public class Main {
    public static void main(String[] args){
        ATextStore aTextStore = new ATextStore();
        Text text = aTextStore.orderText("Hello");
        System.out.println("We ordered Hello card");
        System.out.println(text);
    }
}

<실행결과>

Making a Hello text card

Writting text
Sending text

We ordered Hello card
----Hello----
Malgun
12px