[master] Fix json serializer for tuple and record values

bvm/ballerina-runtime/src/main/java/io/ballerina/runtime/internal/json/JsonGenerator.java

@@ -289,6 +289,7 @@ public void serialize(Object json) throws IOException {
 
         switch (TypeUtils.getImpliedType(TypeChecker.getType(json)).getTag()) {
             case TypeTags.ARRAY_TAG:
+            case TypeTags.TUPLE_TAG:
                 if (json instanceof StreamingJsonValue streamingJsonValue) {
                     streamingJsonValue.serialize(this);
                     break;
@@ -317,6 +318,7 @@ public void serialize(Object json) throws IOException {
                 break;
             case TypeTags.MAP_TAG:
             case TypeTags.JSON_TAG:
+            case TypeTags.RECORD_TYPE_TAG:
                 this.startObject();
                 for (Entry<BString, RefValue> entry : ((MapValueImpl<BString, RefValue>) json).entrySet()) {
                     this.writeFieldName(entry.getKey().getValue());

tests/jballerina-unit-test/src/test/java/org/ballerinalang/nativeimpl/jvm/runtime/api/tests/JsonValues.java

@@ -26,9 +26,12 @@
 import io.ballerina.runtime.api.values.BMap;
 import io.ballerina.runtime.api.values.BString;
 import io.ballerina.runtime.api.values.BTypedesc;
+import io.ballerina.runtime.internal.json.JsonGenerator;
 import io.ballerina.runtime.internal.values.ErrorValue;
 
 import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.StringReader;
 import java.nio.charset.StandardCharsets;
@@ -102,4 +105,16 @@ public static Object testParsingNullString(BString str) {
     public static Object testBStringParsingWithProcessingMode(BString str) {
         return JsonUtils.parse(str, JsonUtils.NonStringValueProcessingMode.FROM_JSON_STRING);
     }
+
+    public static Object testJsonSerializeExtern(Object jsonObject) {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        try (JsonGenerator gen = new JsonGenerator(out)) {
+            gen.serialize(jsonObject);
+            gen.flush();
+            out.close();
+        } catch (IOException e) {
+            throw new ErrorValue(StringUtils.fromString(e.getMessage()));
+        }
+        return StringUtils.fromString(out.toString());
+    }
 }

tests/jballerina-unit-test/src/test/resources/test-src/runtime/api/json/main.bal

@@ -44,8 +44,33 @@ public function main() {
 
     result =  testStringParsingWithProcessingMode(jsonStr);
     test:assertTrue(result is json, "Invalid json");
+
+    testJsonSerialize();
+}
+
+const string[] CONST_ROLES = ["Admin"];
+
+type Profile record {|
+    string name;
+    int age;
+|};
+
+function testJsonSerialize() {
+    Profile profile = {name: "John", age: 30};
+    json j = {
+         roles: CONST_ROLES,
+         ID: "User1",
+          profile: profile
+    };
+    string expected = "{\"roles\":[\"Admin\"], \"ID\":\"User1\", \"profile\":{\"name\":\"John\", \"age\":30}}";
+    string result = checkpanic testJsonSerializeExtern(j);
+    test:assertEquals(result, expected, "Invalid json serialization");
 }
 
+public isolated function testJsonSerializeExtern(json j) returns string|error = @java:Method {
+    'class: "org.ballerinalang.nativeimpl.jvm.runtime.api.tests.JsonValues"
+} external;
+
 public isolated function testParsingWrongCharset(string str) returns json|error = @java:Method {
     'class: "org.ballerinalang.nativeimpl.jvm.runtime.api.tests.JsonValues"
 } external;