commandfactory.java

来自「简单的议程管理的小实验,包含可运行BAT文件和TEST用例」· Java 代码 · 共 25 行

package agenda.command;
import agenda.Exception.*;

/**
 * Command factory
 * @author wc
 */
public class CommandFactory {
    public Command getCommand(String command)
            throws Exception, NoSuchCommandException
    {
        String[] args = command.split(" ", 0);
        String className = "agenda.command." + args[0].toUpperCase();
        try{
            Class cls = Class.forName(className);
            Command com = (Command)cls.newInstance();
            com.parse(args);
            return com;
        }
        catch(ClassNotFoundException e){
            throw new NoSuchCommandException(args[0]);
        }
    }
}