Added JSON and XML examples

Author: simasch

pom.xml

@@ -17,6 +17,7 @@
     <properties>
         <java.version>17</java.version>
         <vaadin.version>22.0.2</vaadin.version>
+        <jooq.version>3.15.5</jooq.version>
     </properties>
 
     <dependencyManagement>

src/main/java/io/seventytwo/demo/api/order/OrderControllerV2.java

@@ -38,18 +38,19 @@ select json_agg(po) as orders
     @GetMapping(value = "/api/v2/orders", produces = MediaType.APPLICATION_XML_VALUE)
     public String getOrdersAsXml(@RequestParam Integer customerId) {
         return dslContext.fetchOne("""
-                select xmlelement(
-                    name "orders",
-                         xmlagg(xmlelement(name "order", 
-                                                xmlattributes(p.id, p.order_date),
-                                                xmlelement(name "items",
-                                               (select xmlagg(xmlelement(name "item",
-                                                              xmlattributes(i.id, i.quantity, pr.name)))
-                                                from order_item i
-                                                join product pr on i.product_id = pr.id
-                                                where i.order_id = p.id)))
-                                               )
-                )
+                  select xmlelement(name "orders",
+                                  xmlagg(xmlelement(name "order", 
+                                                    xmlattributes(p.id, p.order_date),
+                                                    xmlelement(name "items",
+                                                                    (select xmlagg(xmlelement(name "item",
+                                                                                              xmlattributes(i.id, i.quantity, pr.name)))
+                                                                     from order_item i
+                                                                     join product pr on i.product_id = pr.id
+                                                                     where i.order_id = p.id)
+                                                              )
+                                                    )
+                                        )
+                                 )
                 from purchase_order p
                 where p.customer_id = ?
                 """, customerId).into(String.class);

src/main/java/io/seventytwo/demo/api/order/OrderControllerV3.java

@@ -0,0 +1,43 @@
+package io.seventytwo.demo.api.order;
+
+import org.jooq.DSLContext;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+import static io.seventytwo.demo.database.tables.OrderItem.ORDER_ITEM;
+import static io.seventytwo.demo.database.tables.Product.PRODUCT;
+import static io.seventytwo.demo.database.tables.PurchaseOrder.PURCHASE_ORDER;
+import static org.jooq.Records.mapping;
+import static org.jooq.impl.DSL.multiset;
+import static org.jooq.impl.DSL.select;
+
+@RestController
+public class OrderControllerV3 {
+
+    private final DSLContext dslContext;
+
+    public OrderControllerV3(DSLContext dslContext) {
+        this.dslContext = dslContext;
+    }
+
+    @GetMapping(value = "/api/v3/orders", produces = {MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE})
+    public List<OrderDTO> getOrdersAsRecords(@RequestParam Integer customerId) {
+        return dslContext
+                .select(PURCHASE_ORDER.ID,
+                        PURCHASE_ORDER.ORDER_DATE,
+                        multiset(
+                                select(ORDER_ITEM.ID, ORDER_ITEM.QUANTITY, PRODUCT.NAME)
+                                        .from(ORDER_ITEM)
+                                        .join(PRODUCT).on(PRODUCT.ID.eq(ORDER_ITEM.PRODUCT_ID))
+                                        .where(ORDER_ITEM.ORDER_ID.eq(PURCHASE_ORDER.ID))
+                        ).convertFrom(r -> r.into(OrderDTO.OrderItemDTO.class))
+                )
+                .from(PURCHASE_ORDER)
+                .where(PURCHASE_ORDER.CUSTOMER_ID.eq(customerId))
+                .fetch(mapping(OrderDTO::new));
+    }
+}

src/main/java/io/seventytwo/demo/api/order/OrderDTO.java

@@ -0,0 +1,10 @@
+package io.seventytwo.demo.api.order;
+
+import java.time.LocalDate;
+import java.util.List;
+
+public record OrderDTO(Integer id, LocalDate orderDate, List<OrderItemDTO> items) {
+
+    public record OrderItemDTO(Integer id, Integer quantity, String productName) {
+    }
+}

src/test/api/orders.http

@@ -12,3 +12,16 @@ Accept: application/json
 # GET oders for customer v2 as XML
 GET http://localhost:8080/api/v2/orders?customerId=1128
 Accept: application/xml
+
+###
+
+# GET oders for customer v3 as JSON
+GET http://localhost:8080/api/v3/orders?customerId=1128
+Accept: application/json
+
+###
+
+# GET oders for customer v3 as XML
+GET http://localhost:8080/api/v3/orders?customerId=1128
+Accept: application/xml
+