cstamas commented on code in PR #913:
URL: https://github.com/apache/maven/pull/913#discussion_r1080950099


##########
maven-core/src/main/java/org/apache/maven/internal/aether/MavenChainedWorkspaceReader.java:
##########
@@ -60,6 +62,31 @@ public Model findModel(Artifact artifact) {
         return null;
     }
 
+    @Override
+    public Stream<Artifact> listArtifacts() {
+        return Arrays.stream(readers)
+                .flatMap(r -> {
+                    // TODO once resolver 2.x is there this part can be 
simplified
+                    if (r instanceof MavenWorkspaceReader) {
+                        return ((MavenWorkspaceReader) r).listArtifacts();
+                    }
+                    return Stream.empty();

Review Comment:
   personally I prefer if-else, reading code similar to this requires more 
attention IMHO and is easy to slip on it



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