Update Book.java

src/main/java/com/libraryman_api/book/Book.java

@@ -2,40 +2,81 @@
 
 import jakarta.persistence.*;
 
-
+/**
+ * Represents a book entity in the library management system.
+ * This class is mapped to the "books" table in the database.
+ */
 @Entity
 public class Book {
+    /**
+     * The unique identifier for the book.
+     * Automatically generated using a sequence.
+     */
     @Id
-
-    @GeneratedValue(strategy = GenerationType.SEQUENCE,
-            generator = "book_id_generator")
-    @SequenceGenerator(name = "book_id_generator",
-            sequenceName = "book_id_sequence",
-            allocationSize = 1)
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "book_id_generator")
+    @SequenceGenerator(name = "book_id_generator", sequenceName = "book_id_sequence", allocationSize = 1)
     @Column(name = "book_id")
     private int bookId;
 
+    /**
+     * The title of the book.
+     * This field cannot be null.
+     */
     @Column(nullable = false)
     private String title;
 
+    /**
+     * The author of the book.
+     */
     private String author;
 
+    /**
+     * The ISBN (International Standard Book Number) of the book.
+     * This field is unique and cannot be null.
+     */
     @Column(unique = true, nullable = false)
     private String isbn;
 
+    /**
+     * The publisher of the book.
+     */
     private String publisher;
 
+    /**
+     * The year the book was published.
+     */
     @Column(name = "published_year")
     private int publishedYear;
-    private String genre;
 
+    /**
+     * The genre of the book.
+     */
+    private String genre;
 
+    /**
+     * The number of copies available in the library.
+     * This field cannot be null.
+     */
     @Column(name = "copies_available", nullable = false)
     private int copiesAvailable;
 
+    /**
+     * Default constructor for the Book class.
+     */
     public Book() {
     }
 
+    /**
+     * Constructs a new Book with the specified attributes.
+     *
+     * @param title          The title of the book.
+     * @param author         The author of the book.
+     * @param isbn           The ISBN of the book.
+     * @param publisher      The publisher of the book.
+     * @param publishedYear  The year the book was published.
+     * @param genre          The genre of the book.
+     * @param copiesAvailable The number of copies available.
+     */
     public Book(String title, String author, String isbn, String publisher, int publishedYear, String genre, int copiesAvailable) {
         this.title = title;
         this.author = author;
@@ -46,6 +87,7 @@ public Book(String title, String author, String isbn, String publisher, int publ
         this.copiesAvailable = copiesAvailable;
     }
 
+    // Getters
     public int getBookId() {
         return bookId;
     }
@@ -78,7 +120,7 @@ public int getCopiesAvailable() {
         return copiesAvailable;
     }
 
-
+    // Setters
     public void setTitle(String title) {
         this.title = title;
     }
@@ -107,6 +149,11 @@ public void setCopiesAvailable(int copiesAvailable) {
         this.copiesAvailable = copiesAvailable;
     }
 
+    /**
+     * Returns a string representation of the book.
+     *
+     * @return A string containing the book's details.
+     */
     @Override
     public String toString() {
         return "Books{" +