fix: updating the kubernetesserializer handling of time types

closes: #5960

Signed-off-by: Steve Hawkins <shawkins@redhat.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### 6.13-SNAPSHOT
 
 #### Bugs
+* Fix #5960: The serialization of time related types should be string
 * Fix #5866: Addressed cycle in crd generation with Java 19+ and ZonedDateTime
 
 #### Improvements
@@ -17,6 +18,7 @@
 #### New Features
 
 #### _**Note**_: Breaking changes
+* Fix #5960: The KubernetesSerializer will now by default serialize time related types to strings - rather than object, integer, number, or arrays of integer / number. If you are using these types in a custom object and were not including JsonFormat annotations to adjust the serialization they were likely being serialized in a non-standard way that would not be usable other Kubernetes clients, nor match the generated custom resource definition if one was being produced. Please open an issue if you need the previous behavior for whatever reason - there is a workaround by creating a customized KubernetesSerializer.
 
 ### 6.12.1  (2024-04-18)
 

crd-generator/test/src/test/java/io/fabric8/crd/generator/types/TypeMappingsTest.java

@@ -52,17 +52,17 @@ void targetType(String propertyName, String expectedType) {
   private static Stream<Arguments> targetTypeCases() {
     return Stream.of(
         Arguments.of("date", "string"),
-        Arguments.of("localDate", "array"), // to review
-        Arguments.of("localDateTime", "array"), // to review
-        Arguments.of("zonedDateTime", "number"), // to review
-        Arguments.of("offsetDateTime", "number"), // to review
-        Arguments.of("offsetTime", "array"), // to review
-        Arguments.of("yearMonth", "array"), // to review
-        Arguments.of("monthDay", "array"), // to review
-        Arguments.of("instant", "number"), // to review
-        Arguments.of("duration", "integer"), // to review
+        Arguments.of("localDate", "string"),
+        Arguments.of("localDateTime", "string"),
+        Arguments.of("zonedDateTime", "string"),
+        Arguments.of("offsetDateTime", "string"),
+        Arguments.of("offsetTime", "string"),
+        Arguments.of("yearMonth", "string"),
+        Arguments.of("monthDay", "string"),
+        Arguments.of("instant", "string"),
+        Arguments.of("duration", "string"),
         Arguments.of("period", "string"),
-        Arguments.of("timestamp", "integer"), // to review
+        Arguments.of("timestamp", "string"), // to review
         // Arguments.of("aShort", "integer"), // TODO: Not even present in the CRD
         Arguments.of("aShortObj", "integer"),
         Arguments.of("aInt", "integer"),

kubernetes-client-api/src/main/java/io/fabric8/kubernetes/client/utils/KubernetesSerialization.java

@@ -27,6 +27,7 @@
 import com.fasterxml.jackson.databind.KeyDeserializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationConfig;
+import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.cfg.HandlerInstantiator;
 import com.fasterxml.jackson.databind.cfg.MapperConfig;
 import com.fasterxml.jackson.databind.introspect.Annotated;
@@ -90,6 +91,8 @@ public KubernetesSerialization(ObjectMapper mapper, boolean searchClassloaders)
   protected void configureMapper(ObjectMapper mapper) {
     mapper.registerModules(new JavaTimeModule(), unmatchedFieldTypeModule);
     mapper.disable(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE);
+    mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+    mapper.disable(SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS);
     // omit null fields, but keep null map values
     mapper.setDefaultPropertyInclusion(JsonInclude.Value.construct(Include.NON_NULL, Include.ALWAYS));
     HandlerInstantiator instanciator = mapper.getDeserializationConfig().getHandlerInstantiator();