fix: restore backwards compatibility (#1915)

* fix: clean-up unneeded matcher field

* fix: restore backwards compatibility

Note that the current implementation is flawed because custom
ResourceUpdatePreProcessor should be registered to be found when
attempting to use custom matching logic. See also #1914 for more
details.

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/dependent/kubernetes/KubernetesDependentResource.java

@@ -22,7 +22,6 @@
 import io.javaoperatorsdk.operator.api.reconciler.dependent.managed.DependentResourceConfigurator;
 import io.javaoperatorsdk.operator.api.reconciler.dependent.managed.KubernetesClientAware;
 import io.javaoperatorsdk.operator.processing.dependent.AbstractEventSourceHolderDependentResource;
-import io.javaoperatorsdk.operator.processing.dependent.Matcher;
 import io.javaoperatorsdk.operator.processing.dependent.Matcher.Result;
 import io.javaoperatorsdk.operator.processing.dependent.kubernetes.processors.GenericResourceUpdatePreProcessor;
 import io.javaoperatorsdk.operator.processing.event.ResourceID;
@@ -41,16 +40,13 @@ public abstract class KubernetesDependentResource<R extends HasMetadata, P exten
   private static final Logger log = LoggerFactory.getLogger(KubernetesDependentResource.class);
 
   protected KubernetesClient client;
-  private final Matcher<R, P> matcher;
   private final ResourceUpdatePreProcessor<R> processor;
   private final boolean garbageCollected = this instanceof GarbageCollected;
   private KubernetesDependentResourceConfig<R> kubernetesDependentResourceConfig;
 
   @SuppressWarnings("unchecked")
   public KubernetesDependentResource(Class<R> resourceType) {
     super(resourceType);
-    matcher = this instanceof Matcher ? (Matcher<R, P>) this
-        : GenericKubernetesResourceMatcher.matcherFor(this);
 
     processor = this instanceof ResourceUpdatePreProcessor
         ? (ResourceUpdatePreProcessor<R>) this
@@ -141,7 +137,7 @@ public R update(R actual, R target, P primary, Context<P> context) {
   }
 
   public Result<R> match(R actualResource, P primary, Context<P> context) {
-    return matcher.match(actualResource, primary, context);
+    return GenericKubernetesResourceMatcher.match(this, actualResource, primary, context, false);
   }
 
   @SuppressWarnings("unused")

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/dependent/kubernetes/ResourceUpdatePreProcessor.java

@@ -1,11 +1,36 @@
 package io.javaoperatorsdk.operator.processing.dependent.kubernetes;
 
 import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.zjsonpatch.JsonDiff;
+import io.javaoperatorsdk.operator.ReconcilerUtils;
+import io.javaoperatorsdk.operator.api.config.ConfigurationServiceProvider;
 import io.javaoperatorsdk.operator.api.reconciler.Context;
 
 public interface ResourceUpdatePreProcessor<R extends HasMetadata> {
 
   R replaceSpecOnActual(R actual, R desired, Context<?> context);
 
-  boolean matches(R actual, R desired, boolean equality);
+  default boolean matches(R actual, R desired, boolean equality) {
+    final var objectMapper = ConfigurationServiceProvider.instance().getObjectMapper();
+
+    // reflection will be replaced by this:
+    // https://github.com/fabric8io/kubernetes-client/issues/3816
+    var desiredSpecNode = objectMapper.valueToTree(ReconcilerUtils.getSpec(desired));
+    var actualSpecNode = objectMapper.valueToTree(ReconcilerUtils.getSpec(actual));
+    var diffJsonPatch = JsonDiff.asJson(desiredSpecNode, actualSpecNode);
+    // In case of equality is set to true, no diffs are allowed, so we return early if diffs exist
+    // On contrary (if equality is false), "add" is allowed for cases when for some
+    // resources Kubernetes fills-in values into spec.
+    final var diffNumber = diffJsonPatch.size();
+    if (equality && diffNumber > 0) {
+      return false;
+    }
+    for (int i = 0; i < diffNumber; i++) {
+      String operation = diffJsonPatch.get(i).get("op").asText();
+      if (!operation.equals("add")) {
+        return false;
+      }
+    }
+    return true;
+  }
 }

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/dependent/kubernetes/processors/GenericResourceUpdatePreProcessor.java

@@ -10,7 +10,6 @@
 import io.fabric8.kubernetes.api.model.rbac.ClusterRoleBinding;
 import io.fabric8.kubernetes.api.model.rbac.Role;
 import io.fabric8.kubernetes.api.model.rbac.RoleBinding;
-import io.fabric8.zjsonpatch.JsonDiff;
 import io.javaoperatorsdk.operator.ReconcilerUtils;
 import io.javaoperatorsdk.operator.api.config.ConfigurationServiceProvider;
 import io.javaoperatorsdk.operator.api.reconciler.Context;
@@ -50,29 +49,4 @@ protected void updateClonedActual(R actual, R desired) {
     var desiredSpec = ReconcilerUtils.getSpec(desired);
     ReconcilerUtils.setSpec(actual, desiredSpec);
   }
-
-  @Override
-  public boolean matches(R actual, R desired, boolean equality) {
-    final var objectMapper = ConfigurationServiceProvider.instance().getObjectMapper();
-
-    // reflection will be replaced by this:
-    // https://github.com/fabric8io/kubernetes-client/issues/3816
-    var desiredSpecNode = objectMapper.valueToTree(ReconcilerUtils.getSpec(desired));
-    var actualSpecNode = objectMapper.valueToTree(ReconcilerUtils.getSpec(actual));
-    var diffJsonPatch = JsonDiff.asJson(desiredSpecNode, actualSpecNode);
-    // In case of equality is set to true, no diffs are allowed, so we return early if diffs exist
-    // On contrary (if equality is false), "add" is allowed for cases when for some
-    // resources Kubernetes fills-in values into spec.
-    final var diffNumber = diffJsonPatch.size();
-    if (equality && diffNumber > 0) {
-      return false;
-    }
-    for (int i = 0; i < diffNumber; i++) {
-      String operation = diffJsonPatch.get(i).get("op").asText();
-      if (!operation.equals("add")) {
-        return false;
-      }
-    }
-    return true;
-  }
 }