DI_8_set

AppleSpeaker.java

package org.joonzis.DI_8_set;

public class AppleSpeaker implements Speaker {
	public AppleSpeaker() {
		System.out.println("--> AppleSpeaker 객체 생성");
	}
	
	@Override
	public void volumeUp() {
		System.out.println("--> AppleSpeaker 소리 올린다");
	}

	@Override
	public void volumeDown() {
		System.out.println("--> AppleSpeaker 소리 내린다");
	}
}

---

SonySpeaker.java

package org.joonzis.DI_7_dependencyChange;

public class SonySpeaker implements Speaker {
	public SonySpeaker() {
		System.out.println("--> SonySpeaker 객체 생성");
	}
	
	@Override
	public void volumeUp() {
		System.out.println("--> SonySpeaker 소리 올린다");
	}
	@Override
	public void volumeDown() {
		System.out.println("--> SonySpeaker 소리 내린다");
	}
}

---

Speaker.java

package org.joonzis.DI_8_set;

public interface Speaker {
	public void volumeUp();
	public void volumeDown();
}

---

SamsungTV.java

package org.joonzis.DI_8_set;

public class SamsungTV implements TV {

	private Speaker speaker;
	private int price;

	public SamsungTV() {
		System.out.println("--> SamsungTV 객체(1)생성");
	}

	public void setSpeaker(Speaker speaker) {
		this.speaker = speaker;
	}

	public void setPrice(int price) {
		this.price = price;
	}

	@Override
	public void powerOff() {
		System.out.println("--> SamsungTV 전원 끈다(가격 : " + price + ")");
	}

	@Override
	public void powerOn() {
		System.out.println("--> SamsungTV 전원 켠다");
	}

	@Override
	public void volumeDown() {
		speaker.volumeDown();
	}

	@Override
	public void volumeUp() {
		speaker.volumeUp();
	}
}

---

TV.java

package org.joonzis.DI_8_set;

public interface TV {
	public void powerOn();
	public void powerOff();
	public void volumeUp();
	public void volumeDown();
}

---

TVUser.java

package org.joonzis.DI_8_set;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;

public class TVUser {
	public static void main(String[] args) {
		
		// 1. Spring 컨테이너 구동
		AbstractApplicationContext ctx = 
				new GenericXmlApplicationContext("applicationContext8.xml");
		
		// sony 만들어지고 samsung 만들어짐
		TV stv = (SamsungTV)ctx.getBean("stv");		
				
		System.out.println("------------------------");
		
		stv.powerOn();
		stv.volumeUp();
		stv.volumeDown();
		stv.powerOff();
	}
}

---

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
	
	<!-- 
		생성자가 여러 개 오버로딩 되었을 때, 어떤 생성자를 호출해야 할지 불분명하면,
		index 속성을 이용하여 매개변수 맵핑을 한다.
	 -->
	<bean id="stv" class="org.joonzis.DI_8_set.SamsungTV">
		<property name="speaker" ref="apple"/>
		<property name="price" value="1000"/>			
	</bean>
	<bean id="sony" class="org.joonzis.DI_8_set.SonySpeaker"></bean>
	<bean id="apple" class="org.joonzis.DI_8_set.AppleSpeaker"></bean>
	
</beans>