refactor: replace fields by value instead of Optional

Author: metacosm

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/api/config/DefaultResourceConfiguration.java

@@ -14,9 +14,9 @@ public class DefaultResourceConfiguration<R extends HasMetadata>
 
   private final Class<R> resourceClass;
   private final String resourceTypeName;
-  private final Optional<OnAddFilter<R>> onAddFilter;
-  private final Optional<OnUpdateFilter<R>> onUpdateFilter;
-  private final Optional<GenericFilter<R>> genericFilter;
+  private final OnAddFilter<R> onAddFilter;
+  private final OnUpdateFilter<R> onUpdateFilter;
+  private final GenericFilter<R> genericFilter;
   private final String labelSelector;
   private final Set<String> namespaces;
 
@@ -25,9 +25,9 @@ protected DefaultResourceConfiguration(Class<R> resourceClass,
       OnUpdateFilter<R> onUpdateFilter, GenericFilter<R> genericFilter) {
     this.resourceClass = resourceClass;
     this.resourceTypeName = ReconcilerUtils.getResourceTypeName(resourceClass);
-    this.onAddFilter = Optional.ofNullable(onAddFilter);
-    this.onUpdateFilter = Optional.ofNullable(onUpdateFilter);
-    this.genericFilter = Optional.ofNullable(genericFilter);
+    this.onAddFilter = onAddFilter;
+    this.onUpdateFilter = onUpdateFilter;
+    this.genericFilter = genericFilter;
 
     this.namespaces = ResourceConfiguration.ensureValidNamespaces(namespaces);
     this.labelSelector = ResourceConfiguration.ensureValidLabelSelector(labelSelector);
@@ -56,15 +56,15 @@ public Class<R> getResourceClass() {
 
   @Override
   public Optional<OnAddFilter<R>> onAddFilter() {
-    return onAddFilter;
+    return Optional.ofNullable(onAddFilter);
   }
 
   @Override
   public Optional<OnUpdateFilter<R>> onUpdateFilter() {
-    return onUpdateFilter;
+    return Optional.ofNullable(onUpdateFilter);
   }
 
   public Optional<GenericFilter<R>> genericFilter() {
-    return genericFilter;
+    return Optional.ofNullable(genericFilter);
   }
 }