Wiele formatów w @Consumes i @Produces

PC35-RestSerwer/src/main/java/rest/RProduct.java

 package rest;
 
 import java.math.BigDecimal;
-import java.util.List;
 
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
@@ -17,6 +16,7 @@ import sklep.db.DBException;
 import sklep.db.ProductDAO;
 import sklep.db.RecordNotFound;
 import sklep.model.Product;
+import sklep.model.ProductList;
 import sklep.photo.PhotoUtil;
 
 // JAX-RS - część Javy EE
@@ -27,19 +27,20 @@ import sklep.photo.PhotoUtil;
 
 @Path("/products")
 public class RProduct {
-	
+	// Gdy w Produces jest wiele formatów, to klient może wybrać za pomocą nagłówka Accept
+	// Gdy w Consumes jest wiele formatów, to klient może przysłać dane w dowolnym z nich (nagłówek Content-Type)
 	@GET
-	@Produces("application/json")
-	public List<Product> readAllProducts() throws DBException {
+	@Produces({"application/json", "application/xml", "text/plain"})
+	public ProductList readAllProducts() throws DBException {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();
-			return productDAO.readAll();
+			return new ProductList(productDAO.readAll());
 		}
 	}
 
 	@Path("/{id}")
 	@GET
-	@Produces("application/json")
+	@Produces({"application/json", "application/xml", "text/plain"})
 	public Product readOneProduct(@PathParam("id") int productId) throws DBException, RecordNotFound {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();
@@ -56,7 +57,7 @@ public class RProduct {
 	
 	@Path("/{id}/price")
 	@GET
-	@Produces("application/json")
+	@Produces({"application/json", "text/plain"})
 	public BigDecimal getPrice(@PathParam("id") int productId) throws DBException, RecordNotFound {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();
@@ -71,7 +72,7 @@ public class RProduct {
 	// Właśnie poprzez ten parametr przekazywane są dane przysłane w treści zapytania (w praktyce: POST i PUT).
 	@Path("/{id}/price")
 	@PUT
-	@Consumes("application/json")
+	@Consumes({"application/json", "text/plain"})
 	public void setPrice(@PathParam("id") int productId, BigDecimal newPrice) throws DBException, RecordNotFound {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();
@@ -84,7 +85,7 @@ public class RProduct {
 	
 	@Path("/{id}")
 	@PUT
-	@Consumes("application/json")
+	@Consumes({"application/json", "application/xml"})
 	public void updateProduct(@PathParam("id") int productId, Product product) throws DBException {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();
@@ -105,8 +106,8 @@ public class RProduct {
 	// a aplikacja sama wybierze nowe ID z sekwencjii
 	// w wyniku zostanie odesłany uzupełniony produkt
 	@POST
-	@Consumes("application/json")
-	@Produces("application/json")
+	@Consumes({"application/json", "application/xml"})
+	@Produces({"application/json", "application/xml"})
 	public Product addProduct(Product product) throws DBException {
 		try(DBConnection db = DBConnection.open()) {
 			ProductDAO productDAO = db.productDAO();