import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Target;
import java.lang.reflect.AnnotatedElement;

import jp.gr.java_conf.skrb.annotation.Log;
import jp.gr.java_conf.skrb.annotation.LogLevel;

public class LogAnnotationReader {
    public LogAnnotationReader() {}

    public void readAnnotation(String classname) {
        try {
            Class cls = Class.forName(classname);

            System.out.println("Checking " + cls + " ...\n");
            readAnnotation(cls.getDeclaredConstructors(), "Constructor");
            readAnnotation(cls.getDeclaredMethods(), "Method");
        } catch (ClassNotFoundException ex) {
            System.err.println(classname + " が見つかりません");
        }
    }

    public void readAnnotation(AnnotatedElement[] elements, String message) {
        for (AnnotatedElement element : elements) {
            System.out.print(message + "[" + element +"] is ");
            readAnnotation(element);
        }
    }

    private void readAnnotation(AnnotatedElement element) {
        Log log = element.getAnnotation(Log.class);

        if (log != null) {
            LogLevel level = log.value();
            System.out.println("annotated.\n    value: " + level);
        } else {
            System.out.println("not annotated.\n");
        }
    }

    
    public static void main(String[] args) {
        if (args.length == 0) {
            System.err.println("Usage:");
            System.err.println("  java LogAnnotationReader [classname] [classname] ...");
        }

        LogAnnotationReader reader = new LogAnnotationReader();

        for (String classname : args) {
            reader.readAnnotation(classname);
        }
    }
}