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Where The Streets Have No Name
template method패턴을 흉내낸 소스입니다. 본문
// Command.java
package ehr.test;
public interface Command {
public void execute();
}
//NonCommand.java
package ehr.test;
public abstract class NonCommand implements Command{
public abstract void work();
public void execute(){
// 공통코드작성
System.out.println("NonCommand.execute()");
work();
// 공통코드작성
}
}
//TxCommand.java
package ehr.test;
public abstract class TxCommand implements Command {
public abstract void work();
public void execute() {
// 공통코드작성
System.out.println("TxCommand.execute()");
work();
// 공통코드작성
}
}
//ListCommand.java
package ehr.test;
public class ListCommand extends NonCommand {
public void work() {
// TODO Auto-generated method stub
System.out.println("ListCommand.work()");
}
}
//AltCommand.java
package ehr.test;
public class AltCommand extends TxCommand {
public void work() {
// TODO Auto-generated method stub
System.out.println("AltCommand.work()");
}
}
//Template.java
package ehr.test;
public class Template {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Command cmd = null;
cmd = new ListCommand();
cmd.execute();
cmd = new AltCommand();
cmd.execute();
}
}
//출력결과
NonCommand.execute()
ListCommand.work()
TxCommand.execute()
AltCommand.work()
위에서 작성한 NonCommand, TxCommand두개의 클래스는 공통된 코드를 모아둔 장소가 됩니다.
반복되는 코드를 옮겨놓으면 좋겠죠
package ehr.test;
public interface Command {
public void execute();
}
//NonCommand.java
package ehr.test;
public abstract class NonCommand implements Command{
public abstract void work();
public void execute(){
// 공통코드작성
System.out.println("NonCommand.execute()");
work();
// 공통코드작성
}
}
//TxCommand.java
package ehr.test;
public abstract class TxCommand implements Command {
public abstract void work();
public void execute() {
// 공통코드작성
System.out.println("TxCommand.execute()");
work();
// 공통코드작성
}
}
//ListCommand.java
package ehr.test;
public class ListCommand extends NonCommand {
public void work() {
// TODO Auto-generated method stub
System.out.println("ListCommand.work()");
}
}
//AltCommand.java
package ehr.test;
public class AltCommand extends TxCommand {
public void work() {
// TODO Auto-generated method stub
System.out.println("AltCommand.work()");
}
}
//Template.java
package ehr.test;
public class Template {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Command cmd = null;
cmd = new ListCommand();
cmd.execute();
cmd = new AltCommand();
cmd.execute();
}
}
//출력결과
NonCommand.execute()
ListCommand.work()
TxCommand.execute()
AltCommand.work()
위에서 작성한 NonCommand, TxCommand두개의 클래스는 공통된 코드를 모아둔 장소가 됩니다.
반복되는 코드를 옮겨놓으면 좋겠죠