BookController.java

package com.example.librarymanagement.controller;

import com.example.librarymanagement.model.Book;
import com.example.librarymanagement.service.BookService;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private BookService bookService;

    @GetMapping
    @ApiOperation("Get all books")
    public List<Book> getAllBooks() {
        return bookService.getAllBooks();
    }

    @GetMapping("/{id}")
    @ApiOperation("Get a book by ID")
    public Book getBookById(@PathVariable Long id) {
        return bookService.getBookById(id).orElse(null);
    }

    @PostMapping
    @ApiOperation("Add a new book")
    public Book addBook(@RequestBody Book book) {
        return bookService.addBook(book);
    }

    @PutMapping("/{id}")
    @ApiOperation("Update a book")
    public Book updateBook(@PathVariable Long id, @RequestBody Book updatedBook) {
        return bookService.updateBook(id, updatedBook);
    }

    @DeleteMapping("/{id}")
    @ApiOperation("Delete a book by ID")
    public void deleteBook(@PathVariable Long id) {
        bookService.deleteBook(id);
    }
}