1 files changed, 25 insertions, 0 deletions
diff --git a/src/core/lombok/eclipse/handlers/HandleBuilderDefault.java b/src/core/lombok/eclipse/handlers/HandleBuilderDefault.java
new file mode 100644
index 00000000..da184d0b
--- /dev/null
+++ b/src/core/lombok/eclipse/handlers/HandleBuilderDefault.java
@@ -0,0 +1,25 @@
+package lombok.eclipse.handlers;
+
+import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
+import org.eclipse.jdt.internal.compiler.ast.Annotation;
+import org.mangosdk.spi.ProviderFor;
+
+import lombok.Builder;
+import lombok.core.AST.Kind;
+import lombok.core.AnnotationValues;
+import lombok.core.HandlerPriority;
+import lombok.eclipse.EclipseAnnotationHandler;
+import lombok.eclipse.EclipseNode;
+
+@ProviderFor(EclipseAnnotationHandler.class)
+@HandlerPriority(-1025) //HandleBuilder's level, minus one.
+public class HandleBuilderDefault extends EclipseAnnotationHandler<Builder.Default> {
+	@Override public void handle(AnnotationValues<Builder.Default> annotation, Annotation ast, EclipseNode annotationNode) {
+		EclipseNode annotatedField = annotationNode.up();
+		if (annotatedField.getKind() != Kind.FIELD) return;
+		EclipseNode classWithAnnotatedField = annotatedField.up();
+		if (!hasAnnotation(Builder.class, classWithAnnotatedField)) {
+			annotationNode.addWarning("@Builder.Default requires @Builder on the class for it to mean anything.");
+		}
+	}
+}