Map class field to map

-

 import java.lang.reflect.Field;

import java.util.HashMap;

import java.util.Map;


public class AutogeneratedClassMapper {


    public static Map<String, Object> mapFieldsToMap(Object obj) throws IllegalAccessException {

        Map<String, Object> fieldMap = new HashMap<>();

        Class<?> clazz = obj.getClass();

        Field[] fields = clazz.getDeclaredFields();


        for (Field field : fields) {

            field.setAccessible(true);

            Object value = field.get(obj);

            fieldMap.put(field.getName(), value);

        }


        return fieldMap;

    }


    // Example usage

    public static void main(String[] args) throws IllegalAccessException {

        AutogeneratedClass autogeneratedObject = new AutogeneratedClass();

        // Set field values in the autogeneratedObject


        Map<String, Object> fieldMap = mapFieldsToMap(autogeneratedObject);

        System.out.println(fieldMap);

    }

}


Comments

Post a Comment

Popular posts from this blog

Converting JSONArray into CSV file in java

-
package com.loginController; import java.io.File; import org.apache.commons.io.FileUtils; import org.json.CDL; import org.json.JSONArray; import org.json.JSONObject; /**  *  * @author anand  *  */ public class ConvertArray {     public static void main(String myHelpers[]){         String jsonArrayString = "{\"fileName\": [{\"name\": \"Anand\",\"last\": \"Dwivedi\",\"place\": \"Bangalore\"}]}";         JSONObject output;         try {             output = new JSONObject(jsonArrayString);             JSONArray docs = output.getJSONArray("fileName");             File file=new File("JSONSEPERATOR.csv");             String csv = CDL.toString(docs);             FileUtils.writeStringToFile(file, csv);         ...
Read more

Java Design pattern

-
 Singleton Design pattern :-  it's Creational Design Pattern as we need to have only one instance of our class for Ex:- Logger,DBConnector. SingleObject class have its constructor as private and have a static instance of itself. Code:-  public class Singleton { private static Singleton object; private Singleton() { } public static synchronized Singleton getInstance() { if (object == null) object = new Singleton(); return object; } } Eager Initialization :-  public class Singleton { private static Singleton object = new Singleton(); private Singleton() { } public static Singleton getInstance() { return object; } } Double checked Locking :-  public class Singleton { private static volatile Singleton obj = null; private Singleton() { } public static Singleton getInstance() { if (obj == null) { synchronized (Singleton.class) { if (obj == null) obj = new Singleton(); } } ...
Read more