From f202e687505f645c3b01516fb0e759f5227f993c Mon Sep 17 00:00:00 2001
From: Tracey Yoshima <tracey.yoshima@gmail.com>
Date: Tue, 14 Jun 2022 17:04:57 -0700
Subject: [PATCH] Auto-detect style if the list of styles is empty in
 MavenMojoProjectParser. (#379)

fixes #1916
---
 src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java b/src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java
index c7183854..e76eaef7 100644
--- a/src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java
+++ b/src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java
@@ -474,7 +474,7 @@ private Set<Path> pathsToOtherMavenProjects(MavenProject mavenProject) {
     }
 
     private List<J.CompilationUnit> maybeAutodetectStyles(List<J.CompilationUnit> sourceFiles, @Nullable Iterable<NamedStyles> styles) {
-        if (styles != null) {
+        if (styles != null && styles.spliterator().getExactSizeIfKnown() > 0) {
             return sourceFiles;
         }
         Autodetect autodetect = Autodetect.detect(sourceFiles);