feat: configuration adapter

Signed-off-by: Attila Mészáros <a_meszaros@apple.com>

Author: csviri

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

@@ -0,0 +1,19 @@
+package io.javaoperatorsdk.operator.api.config.loader;
+
+import java.util.function.Consumer;
+
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.javaoperatorsdk.operator.api.config.ConfigurationServiceOverrider;
+import io.javaoperatorsdk.operator.api.config.ControllerConfigurationOverrider;
+
+public class ConfigLoader {
+
+  Consumer<ConfigurationServiceOverrider> operatorConfigs() {
+    return null;
+  }
+
+  <R extends HasMetadata> Consumer<ControllerConfigurationOverrider<R>> controllerConfigs(
+      String controllerName) {
+    return null;
+  }
+}

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

@@ -0,0 +1,8 @@
+package io.javaoperatorsdk.operator.api.config.loader;
+
+import java.util.Optional;
+
+public interface ConfigProvider {
+
+  <T> Optional<T> getConfig(String key, Class<T> type);
+}

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

@@ -0,0 +1,3 @@
+package io.javaoperatorsdk.operator.api.config.loader;
+
+public class DefatulConfigProvider implements ConfigProvider {}