package com.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;

/**
 * 
 * This program uses reflection to all information of a class
 * 
 * @version 2014-7-1
 * 
 */

@SuppressWarnings("rawtypes")
public class Reflect {

	private JTextArea textArea;
	private JFrame frame;

	public void link_frame(Reflect_UI frame) {
		this.frame = frame;
		this.textArea = frame.getTextArea();
	}

	public void EnterClassName(String className) {
		try {
			Class c = Class.forName(className);

			printClass(c);

			textArea.append("\n{\n");

			textArea.append("\n// fields\n");
			printFields(c);

			textArea.append("\n// constructors\n");
			printConstructors(c);

			textArea.append("\n//methods \n");
			printMethods(c);

			textArea.append("\n}\n");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(frame, "ClassNotFoundException");
		}

	}

	// print Class
	private void printClass(Class c) {

		Class superC = c.getSuperclass();

		// print modifiers of class
		textArea.append(Modifier.toString(c.getModifiers()) + " " + "class ");
		textArea.append(c.getName() + " ");

		// "superC!=null" 对于Object类
		if (superC != null && superC != Object.class) {
			textArea.append("extends " + superC.getName());
		}

	}

	// print DeclaredFields
	private void printFields(Class c) {
		Field[] fields = c.getDeclaredFields();

		for (Field f : fields) {

			textArea.append(Modifier.toString(f.getModifiers()) + " "
					+ f.getType().getName() + " " + f.getName() + "\n");
		}
	}

	// print DeclaredConstructors
	private void printConstructors(Class c) {
		Constructor[] constructors = c.getDeclaredConstructors();

		for (Constructor con : constructors) {

			textArea.append(Modifier.toString(con.getModifiers()) + " "
					+ con.getName() + " (");
			int i = 0;
			for (Class par : con.getParameterTypes()) {
				if (i > 0)
					textArea.append(", ");
				textArea.append(par.getTypeName());
				i++;
			}
			textArea.append(")\n");
		}
	}

	// print DeclaredMethods
	private void printMethods(Class c) {
		Method[] methods = c.getDeclaredMethods();

		for (Method m : methods) {

			textArea.append(Modifier.toString(m.getModifiers()) + " "
					+ m.getReturnType().getName() + " " + m.getName() + " (");

			int i = 0;
			for (Class par : m.getParameterTypes()) {
				if (i > 0)
					textArea.append(", ");
				textArea.append(par.getTypeName());
				i++;
			}

			textArea.append(")\n");
		}

	}

}
//源代码片段来自云代码http://yuncode.net