introduce LoggerCarrier

Author: burdoto

src/main/java/org/comroid/api/ContextualProvider.java

@@ -14,7 +14,7 @@
 
 @Experimental
 @MustExtend(ContextualProvider.Base.class)
-public interface ContextualProvider extends Named, Upgradeable<ContextualProvider> {
+public interface ContextualProvider extends Named, Upgradeable<ContextualProvider>, LoggerCarrier {
     @Internal
     default @Nullable ContextualProvider getParentContext() {
         return null;

src/main/java/org/comroid/api/LoggerCarrier.java

@@ -0,0 +1,13 @@
+package org.comroid.api;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.comroid.util.StackTraceUtils;
+import org.jetbrains.annotations.ApiStatus.OverrideOnly;
+
+public interface LoggerCarrier {
+    @OverrideOnly
+    default Logger getLogger() {
+        return LogManager.getLogger(StackTraceUtils.callerClass(1));
+    }
+}

src/main/java/org/comroid/api/Upgradeable.java

@@ -1,10 +1,7 @@
 package org.comroid.api;
 
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 import org.comroid.annotations.Upgrade;
 import org.jetbrains.annotations.ApiStatus.Experimental;
-import org.jetbrains.annotations.ApiStatus.Internal;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.reflect.InvocationTargetException;
@@ -14,10 +11,7 @@
 import java.util.Optional;
 
 @Experimental
-public interface Upgradeable<T> extends Specifiable<T> {
-    @Internal
-    Logger logger = LogManager.getLogger();
-
+public interface Upgradeable<T> extends Specifiable<T>, LoggerCarrier {
     @SuppressWarnings("unchecked")
     @Experimental
     default <R extends T> @NotNull R upgrade(Class<? super R> target) {
@@ -55,7 +49,7 @@ default <R extends T> Optional<R> as(Class<R> type) {
                     try {
                         return Optional.of(upgrade(type));
                     } catch (Throwable t) {
-                        logger.warn("Could not upgrade to type {} when specifying", type, t);
+                        getLogger().warn("Could not upgrade to type {} when specifying", type, t);
                         return Optional.empty();
                     }
                 });