更新メソッドのためにフォームオブジェクトからエンティティにデータを転送するためのよりクリーンな方法は何でしょうか？

以下のコントローラーのコードをリファクタリングしようとしています：

 @PutMapping("products/{productId}")
    public ProductResponse updateProduct(@PathVariable("productId") Long productId, @RequestBody ProductForm productForm) {
        Optional<Product> foundProductOpt = productRepository.findById(productId);
        Product foundProduct = foundProductOpt.orElseThrow(() -> new EntityNotFoundException("productId" + productId + "not found."));

        //would like to refactor code below!!

        foundProduct.setProductTitle(productForm.getProductTitle());
        foundProduct.setProductPrice(productForm.getProductPrice());
        foundProduct.setProductDescription(productForm.getProductDescription());
        foundProduct.setProductImage(productForm.getProductImage());
        productRepository.save(foundProduct);

        return new ProductResponse(null, "product updated");
    }

フォームオブジェクトからエンティティオブジェクトに値を転送するだけです。メソッドを作成することを考えましたが、エンティティにメソッドを記述したくなかったため、他にどのようなソリューションがあるのか​​わかりません。

リクエストに応じて、以下は私の製品とフォームオブジェクトです。検証にフォームオブジェクトを使用してから、データをProductオブジェクトに転送したいと思います。

Product.java

package com.assignment.restapi.domain;

import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.UpdateTimestamp;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.validation.constraints.Min;
import java.util.Date;

@Entity
public class Product {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long productId;
    private String productImage;
    private String productTitle;
    private String productDescription;
    private Integer productPrice;
    //https://stackoverflow.com/questions/49954812/how-can-you-make-a-created-at-column-generate-the-creation-date-time-automatical/49954965#49954965
    @CreationTimestamp
    private Date createdAt;
    @UpdateTimestamp
    private Date updatedAt;

    // default constructor
    public Product() {

    }
    // parameterized constructor-User enetered value goes here to set the fields of the instantiated object.
    public Product(String productImage, String productTitle, String productDescription, Integer productPrice, Date createdAt) {
        this.productImage = productImage;
        this.productTitle = productTitle;
        this.productDescription = productDescription;
        this.productPrice = productPrice;
        this.createdAt = createdAt;
    }
    // getter methods are used to retrieve a value from an object.
    // setter methods are used to set a new value to an object.
    public Long getProductId() {
        return productId;
    }

    public void setProductId(Long productId) {
        this.productId = productId;
    }

    public String getProductImage() {
        return productImage;
    }

    public void setProductImage(String productImage) {
        this.productImage = productImage;
    }

    public String getProductTitle() {
        return productTitle;
    }

    public void setProductTitle(String productTitle) {
        this.productTitle = productTitle;
    }

    public String getProductDescription() {
        return productDescription;
    }

    public void setProductDescription(String productDescription) {
        this.productDescription = productDescription;
    }

    public Integer getProductPrice() {
        return productPrice;
    }

    public void setProductPrice(@Min(value = 1, message = "値段は0以上の値を設定してください。") Integer productPrice) {
        this.productPrice = productPrice;
    }

    public Date getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(Date createdAt) {
        this.createdAt = createdAt;
    }

    public Date getUpdatedAt() {
        return updatedAt;
    }

    public void setUpdatedAt(Date updatedAt) {
        this.updatedAt = updatedAt;
    }
}

ProductForm.java

package com.assignment.restapi.web.view;

import com.assignment.restapi.domain.Product;

import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Size;

public class ProductForm {

    String productImage;

    @NotBlank(message = "Product title is necessary")
    @Size(max = 100, message = "Product title has to be less than 100 letters")
    String productTitle;

    @Size(max = 500, message = "Product title has to be less than 500 letters")
    String productDescription;

    @Min(value = 1, message = "price has to have a value larger than 1")
    Integer productPrice;

    public ProductForm() {

    }

    public ProductForm(String productImage, String productTitle, String productDescription, Integer productPrice) {
        this.productImage = productImage;
        this.productTitle = productTitle;
        this.productDescription = productDescription;
        this.productPrice = productPrice;
    }

    public String getProductImage() {
        return productImage;
    }

    public void setProductImage(String productImage) {
        this.productImage = productImage;
    }

    public String getProductTitle() {
        return productTitle;
    }

    public void setProductTitle(String productTitle) {
        this.productTitle = productTitle;
    }

    public String getProductDescription() {
        return productDescription;
    }

    public void setProductDescription(String productDescription) {
        this.productDescription = productDescription;
    }

    public Integer getProductPrice() {
        return productPrice;
    }

    public void setProductPrice(Integer productPrice) {
        this.productPrice = productPrice;
    }

    //turns productForm into Product object.
    public Product convertToProduct() {
        //step by step debug mode, new object constructor function in Product.java gets called.
        //setter methods get called and values of the ProductForm object gets passed and becomes the new value of the Product object.
        Product product = new Product();
        product.setProductTitle(this.productTitle);
        product.setProductImage(this.productImage);
        product.setProductDescription(this.productDescription);
        product.setProductPrice(this.productPrice);
        return product;
    }
}