Change book price data type to BigDecimal

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/BookstoreApplication.java

@@ -2,6 +2,8 @@
 
 package com.fjordtek.bookstore;
 
+import java.math.BigDecimal;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.boot.CommandLineRunner;
@@ -41,7 +43,7 @@ public class BookstoreApplication extends SpringBootServletInitializer {
 					"Angela Carter",
 					1979,
 					"1231231-12",
-					18.00,
+					new BigDecimal("18.00"),
 					categoryRepository.findByName("Horror").get(0)
 					));
 			bookRepository.save(new Book(
@@ -49,7 +51,7 @@ public class BookstoreApplication extends SpringBootServletInitializer {
 					"Andrzej Sapkowski",
 					1999,
 					"3213221-3",
-					19.99,
+					new BigDecimal("19.99"),
 					categoryRepository.findByName("Fantasy").get(0)
 					));
 

bookstore/src/main/java/com/fjordtek/bookstore/model/Book.java

@@ -2,6 +2,8 @@
 
 package com.fjordtek.bookstore.model;
 
+import java.math.BigDecimal;
+
 import javax.persistence.Column;
 
 //import java.sql.Timestamp;
@@ -149,8 +151,7 @@ public class Book {
 	@DecimalMax(
 			value   = maxPrice, message = "Too high price value. Maximum allowed: " + maxPrice
 			)
-	// TODO: Use BigDecimal to keep exact precision?
-	private double price;
+	private BigDecimal price;
 
 	@ManyToOne(
 			//fetch    = FetchType.LAZY,
@@ -188,7 +189,7 @@ public class Book {
 		this.isbn = isbn;
 	}
 
-	public void setPrice(double price) {
+	public void setPrice(BigDecimal price) {
 		this.price = price;
 	}
 
@@ -221,7 +222,7 @@ public class Book {
 		return isbn;
 	}
 
-	public double getPrice() {
+	public BigDecimal getPrice() {
 		return price;
 	}
 
@@ -234,7 +235,7 @@ public class Book {
 
 	public Book() {}
 
-	public Book(String title, String author, int year, String isbn, double price, Category category) {
+	public Book(String title, String author, int year, String isbn, BigDecimal price, Category category) {
 		// super();
 	    this.title    = title;
 	    this.author   = author;