package com.utils;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import java.lang.reflect.Parameter;

/**

* @author ManhKM on 8/1/2022

* @project Java-Reflection

*/

public class CommonUtils {

// get thông tin Class:

public static void getClassInfo(Class clazz){

System.out.println(String.format("Class: %s", clazz.getName()));

System.out.println(String.format("Package: %s", clazz.getPackage().getName()));

System.out.println(String.format("Modifier public: %s", Modifier.isPublic(clazz.getModifiers())));

}

// get thông tin các trường

public static void getFields(Class clazz){

Field[] fs = clazz.getDeclaredFields();

for (int i = 0; i < fs.length; i++){

System.out.println(fs[i].getType());

System.out.println(" " + fs[i].getName());

}

}

// get thông tin method:

public static void getMethods(Class clazz){

Method[] ms = clazz.getDeclaredMethods();

for (int i = 0; i < ms.length; i++){

System.out.println(ms[i].getName());

Parameter[] ps = ms[i].getParameters();

for (int j = 0; j < ps.length; j++){

System.out.println(" " + ps[j].getParameterizedType());

System.out.println(" " + ps[j].getName());

}

}

}

// tạo mới đối tượng:

public static Object createObject(Class clazz, String[] fields, Object[] values){

try {

Object obj = clazz.newInstance();

for(int i = 0; i < fields.length; i++){

Field field = clazz.getDeclaredField(fields[i]);

field.setAccessible(true);

field.set(obj, values[i]);

}

return obj;

} catch (InstantiationException e) {

e.printStackTrace();

return null;

} catch (IllegalAccessException e) {

e.printStackTrace();

return null;

} catch (NoSuchFieldException e) {

e.printStackTrace();

return null;

}

}

}