Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main {
    /**
     * Copy fields from parent object to new child object.
     *
     * @param parent parent object
     * @param childClass child class
     * @param <T> child class
     * @return filled child object
     */
    public static <T> T shallowCopy(Object parent, Class<T> childClass) {
        try {
            return shallowCopy(parent, childClass.newInstance());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Copy fields from parent object to child object.
     *
     * @param parent parent object
     * @param child child object
     * @param <T> child class
     * @return filled child object
     */
    public static <T> T shallowCopy(Object parent, T child) {
        try {
            List<Field> fields = new ArrayList<>();
            Class clazz = parent.getClass();
            do {
                fields.addAll(Arrays.asList(clazz.getDeclaredFields()));
            } while (!(clazz = clazz.getSuperclass()).equals(Object.class));

            for (Field field : fields) {
                field.setAccessible(true);
                field.set(child, field.get(parent));
            }

            return child;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}