From ff14e0fc4e3fe4f5b8a67640d28850064661d7ab Mon Sep 17 00:00:00 2001
From: Matthias Jaros <jarlucmat@mailbox.org>
Date: Wed, 12 Aug 2026 13:24:27 +0200
Subject: Major refactoring of package structure

---
 .../java/com/it_jaros/jscanner/scan/engine/PollState.java   | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 src/main/java/com/it_jaros/jscanner/scan/engine/PollState.java

(limited to 'src/main/java/com/it_jaros/jscanner/scan/engine/PollState.java')

diff --git a/src/main/java/com/it_jaros/jscanner/scan/engine/PollState.java b/src/main/java/com/it_jaros/jscanner/scan/engine/PollState.java
new file mode 100644
index 0000000..54ec767
--- /dev/null
+++ b/src/main/java/com/it_jaros/jscanner/scan/engine/PollState.java
@@ -0,0 +1,13 @@
+package com.it_jaros.jscanner.scan.engine;
+
+/**
+ * A sealed interface representing the three possible outcomes of a CompletionService
+ * poll operation: successful result, task failure, or not ready yet.
+ * Makes error handling explicit — Failure and Unavailable are distinct and compile-time
+ * required to handle via exhaustiveness checking in switch statements.
+ */
+public sealed interface PollState<T> {
+    record Success<T>(T value) implements PollState<T> {}
+    record Failure<T>(Throwable error) implements PollState<T> {}
+    record Unavailable<T>() implements PollState<T> {}
+}
-- 
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