package reflect;

import java.util.*;
import java.lang.reflect.*;

/**
 * This program uses reflection
 * @version 1.1 20156.30
 * @author Administrator
 *
 */

public class ReflectionTest {

	public static void main(String[] args){
		
				
		String name;
		if(args.length>0)
			name=args[0];
		else{
			
			Scanner in=new Scanner(System.in);
			System.out.println("Enter class name(e.g. java.util.Date):");
			name=in.next();
		}
		
		try{
			
			Class cl=Class.forName(name);
			Class superCl=cl.getSuperclass();
			
			String modifiers=Modifier.toString(cl.getModifiers());
			if(modifiers.length()>0) System.out.print(modifiers+" ");
			System.out.print("class"+" "+cl.getName());
			if(superCl!=null&&superCl!=Object.class)
				System.out.println(" extends"+superCl.getName()+"{");
			
			printConstructors(cl);
			System.out.println();
			printMethods(cl);
			System.out.println();
			printFields(cl);
			System.out.println("}");
			
				
		}catch(ClassNotFoundException e){
			e.printStackTrace();
		}
	}
	
	/**
	 * Prints all constructors of a class
	 * @param cl a class
	 */
	                                                                                                                                                                 
	public static void printConstructors(Class cl)
	{
		
		Constructor[] constructors=cl.getDeclaredConstructors();
		for(Constructor c:constructors){
			
			String name=c.getName();
			System.out.print("	");
			String modifiers=Modifier.toString(c.getModifiers());
			if(modifiers.length()>0)
				System.out.print(modifiers);
			
			System.out.print(" "+name+"(");
			
			Class[] paramTypes=c.getParameterTypes();
			for(int j=0;j<paramTypes.length;j++)
			{
				if(j>0)
					System.out.print(", ");
				
				System.out.print(paramTypes[j].getName());
			}
			
			System.out.println(");");
			
			
		}
		
	}
	
	/**
	 * Prints all methods of a class
	 * @param cl a class
	 */
	
	public static void printMethods(Class cl)
	{
		Method[] methods=cl.getDeclaredMethods();
		for(Method m:methods)
		{
			Class retType=m.getReturnType();
			String name=m.getName();
			System.out.print("	");
			String modifiers=Modifier.toString(m.getModifiers());
			
			if(modifiers.length()>0)
				System.out.print(modifiers+" ");
			System.out.print(retType.getName()+" ");
			System.out.print(name+"(");
			
			Class[] paramTypes=m.getParameterTypes();
			for(int j=0;j<paramTypes.length;j++)
			{
				if(j>0)
					System.out.print(", ");
				System.out.print(paramTypes[j].getName());
			}
			
			System.out.println(");");
					
		}
		
	}
	
	/**
	 * Prints all fields of a class
	 * @param a class
	 */
	
	public static void printFields(Class cl)
	{
		
		Field[] fields=cl.getDeclaredFields();
		
		for(Field f:fields)
		{
			Class type=f.getType();
			String name=f.getName();
			System.out.print("	");
			String modifiers=Modifier.toString(f.getModifiers());
			if(modifiers.length()>0)
				System.out.print(modifiers+" ");
			
			System.out.println(type.getName()+" "+name+";");
		}
	}
}