feat(parser): map JsonNode to Object (#2398)

* Map JsonNode to Object

* Improve test

* Test nullability

* Remove nullability as Object is translated to unknown

---------

Co-authored-by: Anton Platonov <platosha@gmail.com>

packages/java/parser-jvm-plugin-transfertypes/src/main/java/com/vaadin/hilla/parser/plugins/transfertypes/TransferTypesPlugin.java

@@ -9,6 +9,7 @@
 
 import javax.annotation.Nonnull;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import com.vaadin.hilla.mappedtypes.Order;
 import com.vaadin.hilla.mappedtypes.Pageable;
 import com.vaadin.hilla.mappedtypes.Sort;
@@ -32,7 +33,7 @@ public final class TransferTypesPlugin
         extends AbstractPlugin<PluginConfiguration> {
     static private final Map<String, Class<?>> classMap = new HashMap<>();
 
-    {
+    static {
         classMap.put("org.springframework.data.domain.Page", List.class);
         classMap.put("org.springframework.data.domain.Pageable",
                 Pageable.class);
@@ -42,6 +43,7 @@ public final class TransferTypesPlugin
         classMap.put("reactor.core.publisher.Flux", Flux.class);
         classMap.put("com.vaadin.hilla.EndpointSubscription",
                 EndpointSubscription.class);
+        classMap.put(JsonNode.class.getName(), Object.class);
     }
 
     public TransferTypesPlugin() {

packages/java/parser-jvm-plugin-transfertypes/src/test/java/com/vaadin/hilla/parser/plugins/transfertypes/jsonnode/Endpoint.java

@@ -0,0 +1,11 @@
+package com.vaadin.hilla.parser.plugins.transfertypes.jsonnode;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface Endpoint {
+}

packages/java/parser-jvm-plugin-transfertypes/src/test/java/com/vaadin/hilla/parser/plugins/transfertypes/jsonnode/JsonNodeEndpoint.java

@@ -0,0 +1,10 @@
+package com.vaadin.hilla.parser.plugins.transfertypes.jsonnode;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+@Endpoint
+public class JsonNodeEndpoint {
+    public JsonNode echo(JsonNode node) {
+        return node;
+    }
+}

packages/java/parser-jvm-plugin-transfertypes/src/test/java/com/vaadin/hilla/parser/plugins/transfertypes/jsonnode/JsonNodeTest.java

@@ -0,0 +1,27 @@
+package com.vaadin.hilla.parser.plugins.transfertypes.jsonnode;
+
+import com.vaadin.hilla.parser.core.Parser;
+import com.vaadin.hilla.parser.plugins.backbone.BackbonePlugin;
+import com.vaadin.hilla.parser.plugins.transfertypes.TransferTypesPlugin;
+import com.vaadin.hilla.parser.plugins.transfertypes.test.helpers.TestHelper;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.util.Set;
+
+public class JsonNodeTest {
+    private final TestHelper helper = new TestHelper(getClass());
+
+    @Test
+    public void should_ReplaceJsonNodeClassWithObject()
+            throws IOException, URISyntaxException {
+        var openAPI = new Parser().classLoader(getClass().getClassLoader())
+                .classPath(Set.of(helper.getTargetDir().toString()))
+                .endpointAnnotation(Endpoint.class.getName())
+                .addPlugin(new BackbonePlugin())
+                .addPlugin(new TransferTypesPlugin()).execute();
+
+        helper.executeParserWithConfig(openAPI);
+    }
+}

packages/java/parser-jvm-plugin-transfertypes/src/test/resources/com/vaadin/hilla/parser/plugins/transfertypes/jsonnode/openapi.json

@@ -0,0 +1,55 @@
+{
+  "openapi" : "3.0.1",
+  "info" : {
+    "title" : "Hilla Application",
+    "version" : "1.0.0"
+  },
+  "servers" : [
+    {
+      "url" : "http://localhost:8080/connect",
+      "description" : "Hilla Backend"
+    }
+  ],
+  "tags" : [
+    {
+      "name" : "JsonNodeEndpoint",
+      "x-class-name" : "com.vaadin.hilla.parser.plugins.transfertypes.jsonnode.JsonNodeEndpoint"
+    }
+  ],
+  "paths" : {
+    "/JsonNodeEndpoint/echo" : {
+      "post" : {
+        "tags" : [
+          "JsonNodeEndpoint"
+        ],
+        "operationId" : "JsonNodeEndpoint_echo_POST",
+        "requestBody" : {
+          "content" : {
+            "application/json" : {
+              "schema" : {
+                "type" : "object",
+                "properties" : {
+                  "node" : {
+                    "type" : "object"
+                  }
+                }
+              }
+            }
+          }
+        },
+        "responses" : {
+          "200" : {
+            "description" : "",
+            "content" : {
+              "application/json" : {
+                "schema" : {
+                  "type" : "object"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}