open-api: support jakarta.ws.rs.DefaultValue handling

Author: kliushnichenko

modules/jooby-openapi/src/main/java/io/jooby/internal/openapi/AnnotationParser.java

@@ -122,6 +122,20 @@ public Optional<String> getDefaultValue(List<AnnotationNode> annotations) {
           }
         }
       }
+      return getJakartaDefaultValue(annotations);
+    }
+
+    public Optional<String> getJakartaDefaultValue(List<AnnotationNode> annotations) {
+      List<Class> names =
+          Stream.of(annotations()).filter(it -> it.getName().startsWith("jakarta.ws.rs")).toList();
+      for (var a : annotations) {
+        if (a.values != null) {
+          var matches = names.stream().anyMatch(it -> "Ljakarta/ws/rs/DefaultValue;".equals(a.desc));
+          if (matches) {
+            return AnnotationUtils.findAnnotationValue(a, "value").map(Objects::toString);
+          }
+        }
+      }
       return Optional.empty();
     }
 

modules/jooby-openapi/src/test/java/issues/i3835/App3835Jakarta.java

@@ -0,0 +1,16 @@
+/*
+ * Jooby https://jooby.io
+ * Apache License Version 2.0 https://jooby.io/LICENSE.txt
+ * Copyright 2014 Edgar Espina
+ */
+package issues.i3835;
+
+import io.jooby.Jooby;
+
+import static io.jooby.openapi.MvcExtensionGenerator.toMvcExtension;
+
+public class App3835Jakarta extends Jooby {
+  {
+    mvc(toMvcExtension(C3835Jakarta.class));
+  }
+}

modules/jooby-openapi/src/test/java/issues/i3835/C3835Jakarta.java

@@ -0,0 +1,33 @@
+/*
+ * Jooby https://jooby.io
+ * Apache License Version 2.0 https://jooby.io/LICENSE.txt
+ * Copyright 2014 Edgar Espina
+ */
+package issues.i3835;
+
+import jakarta.ws.rs.DefaultValue;
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.QueryParam;
+
+import java.util.List;
+import java.util.Map;
+
+@Path("/3835")
+public class C3835Jakarta {
+
+  /**
+   * Search/scan index.
+   *
+   * @param q Search string. Defaults to <code>*</code>
+   * @return Search result.
+   */
+  @GET
+  public Map<String, Object> search(
+      @QueryParam("q") @DefaultValue("*") String q,
+      @QueryParam("pageSize") @DefaultValue("20") int pageSize,
+      @QueryParam("page") @DefaultValue("1") int page,
+      @QueryParam("options") @DefaultValue("--a") List<String> options) {
+    return null;
+  }
+}

modules/jooby-openapi/src/test/java/issues/i3835/Issue3835.java

@@ -63,4 +63,56 @@ public void shouldGenerateCorrectName(OpenAPIResult result) {
                               type: object\
             """);
   }
+
+  @OpenAPITest(value = App3835Jakarta.class)
+  public void shouldGenerateJakartaDefaultValues(OpenAPIResult result) {
+    assertThat(result.toYaml())
+        .isEqualToIgnoringNewLines(
+            """
+            openapi: 3.0.1
+            info:
+              title: 3835Jakarta API
+              description: 3835Jakarta API description
+              version: "1.0"
+            paths:
+              /3835:
+                get:
+                  summary: Search/scan index.
+                  operationId: search
+                  parameters:
+                  - name: q
+                    in: query
+                    description: Search string. Defaults to *
+                    schema:
+                      type: string
+                      default: '*'
+                  - name: pageSize
+                    in: query
+                    schema:
+                      type: integer
+                      format: int32
+                      default: 20
+                  - name: page
+                    in: query
+                    schema:
+                      type: integer
+                      format: int32
+                      default: 1
+                  - name: options
+                    in: query
+                    schema:
+                      type: array
+                      items:
+                        type: string
+                  responses:
+                    "200":
+                      description: Search result.
+                      content:
+                        application/json:
+                          schema:
+                            type: object
+                            additionalProperties:
+                              type: object\
+            """);
+  }
 }