[fixes #3116] Add multi round support for mapstruct

AUTHORS

@@ -1,6 +1,7 @@
 Lombok contributors in alphabetical order:
 
 Adam Juraszek <juriad@gmail.com>
+Aleksandar Kanchev <136312841+kanchev1@users.noreply.github.com>
 Aleksandr Zhelezniak <lekan1992@gmail.com>
 Amine Touzani <ttzn.dev@gmail.com>
 Andre Brait <andrebrait@gmail.com>

src/bindings/mapstruct/lombok/mapstruct/NotifierHider.java

@@ -1,35 +1,37 @@
 package lombok.mapstruct;
 
-import java.lang.reflect.Field;
+import org.mapstruct.ap.spi.AstModifyingAnnotationProcessor;
 
+import javax.lang.model.element.AnnotationMirror;
 import javax.lang.model.type.TypeMirror;
+import java.util.List;
 
-import org.mapstruct.ap.spi.AstModifyingAnnotationProcessor;
-
+/**
+ * Report to MapStruct that a type is completed when there aren't any Lombok annotations left on it. Lombok annotations
+ * are removed whenever a class is processed. This way, annotations which require multiple rounds to process are also
+ * correctly handled, and MapStruct processing will be delayed until Lombok completely finishes processing required types.
+ */
 class NotifierHider {
 
 	public static class AstModificationNotifier implements AstModifyingAnnotationProcessor {
-		private static Field lombokInvoked;
-
-		@Override public boolean isTypeComplete(TypeMirror type) {
-			if (System.getProperty("lombok.disable") != null) return true;
-			return isLombokInvoked();
-		}
-
-		private static boolean isLombokInvoked() {
-			if (lombokInvoked != null) {
-				try {
-					return lombokInvoked.getBoolean(null);
-				} catch (Exception e) {}
+
+		@Override
+		public boolean isTypeComplete(final TypeMirror typeMirror) {
+			final List<? extends AnnotationMirror> annotationMirrors = typeMirror.getAnnotationMirrors();
+			if (annotationMirrors == null || annotationMirrors.isEmpty()) {
 				return true;
 			}
-
-			try {
-				Class<?> data = Class.forName("lombok.launch.AnnotationProcessorHider$AstModificationNotifierData");
-				lombokInvoked = data.getField("lombokInvoked");
-				return lombokInvoked.getBoolean(null);
-			} catch (Exception e) {}
+
+			for (final AnnotationMirror annotationMirror : annotationMirrors) {
+				final String annotationName = String.valueOf(annotationMirror);
+				// check for ClaimingProcessor's SupportedAnnotationTypes
+				if (annotationName.startsWith("@lombok.")) {
+					return false;
+				}
+			}
+
 			return true;
+
 		}
 	}
 }

src/launch/lombok/launch/AnnotationProcessor.java

@@ -39,10 +39,6 @@
 
 class AnnotationProcessorHider {
 
-	public static class AstModificationNotifierData {
-		public volatile static boolean lombokInvoked = false;
-	}
-
 	public static class AnnotationProcessor extends AbstractProcessor {
 		private final AbstractProcessor instance = createWrappedInstance();
 
@@ -60,7 +56,6 @@ public static class AnnotationProcessor extends AbstractProcessor {
 
 		@Override public void init(ProcessingEnvironment processingEnv) {
 			disableJava9SillyWarning();
-			AstModificationNotifierData.lombokInvoked = true;
 			instance.init(processingEnv);
 			super.init(processingEnv);
 		}