controller for Author-Book One-To-Many Relationship

controller.java

package com.loya.onetomanybidirectionaldemo.controller;

import com.loya.onetomanybidirectionaldemo.entity.Author;
import com.loya.onetomanybidirectionaldemo.entity.Book;
import com.loya.onetomanybidirectionaldemo.service.AuthorService;
import com.loya.onetomanybidirectionaldemo.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;

import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Optional;

@RestController
public class controller {

    @Autowired
    AuthorService authorService;

    @Autowired
    BookService bookService;

    //Author
    @RequestMapping(value = "/getAllAuthors", method = RequestMethod.GET)
    public List<Author> getAuthors() {
        return authorService.getAuthors();
    }

    
    @RequestMapping(value = "/author", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
    public Author createAuthor(@RequestBody Author author) {
        return authorService.createAuthor(author);
    }

    @RequestMapping(value = "/getAllBooks", method = RequestMethod.GET)
    public List<Book> getBooks() {
        return bookService.getAllBooks();
    }


    //Book
    @RequestMapping(value = "/{authorId}/book", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
    public Book createBook(@PathVariable(value = "authorId") Long authorId, @RequestBody Book book) {
        return bookService.createBook(authorId, book);
    }

    @RequestMapping(value = "/book/{bookId}", method = RequestMethod.GET)
    public Optional<Book> getBookById(@PathVariable(value = "bookId") Long bookId) {
        return bookService.getBookById(bookId);
    }
    
    //others omitted for brevity

}