Drop the pattern list constant

Author: joegallo

modules/ingest-common/src/main/java/org/elasticsearch/ingest/common/CefParser.java

@@ -68,19 +68,17 @@ final class CefParser {
     );
 
     // Comprehensive regex pattern to match various MAC address formats
-    private static final List<String> MAC_ADDRESS_REGEXES = List.of(
-        // Combined colon and hyphen separated 6-group patterns
-        "(([0-9A-Fa-f]{2}[:|-]){5}[0-9A-Fa-f]{2})",
-        // Dot-separated 6-group pattern
-        "([0-9A-Fa-f]{4}\\.){2}[0-9A-Fa-f]{4}",
-        // Combined colon and hyphen separated 8-group patterns
-        "([0-9A-Fa-f]{2}[:|-]){7}[0-9A-Fa-f]{2}",
-        // Dot-separated EUI-64
-        "([0-9A-Fa-f]{4}\\.){3}[0-9A-Fa-f]{4}"
-    );
-
     private static final Pattern MAC_ADDRESS_PATTERN = Pattern.compile(
-        MAC_ADDRESS_REGEXES.stream().collect(Collectors.joining("|", "^(", ")$"))
+        Stream.of(
+            // Combined colon and hyphen separated 6-group patterns
+            "(([0-9A-Fa-f]{2}[:|-]){5}[0-9A-Fa-f]{2})",
+            // Dot-separated 6-group pattern
+            "([0-9A-Fa-f]{4}\\.){2}[0-9A-Fa-f]{4}",
+            // Combined colon and hyphen separated 8-group patterns
+            "([0-9A-Fa-f]{2}[:|-]){7}[0-9A-Fa-f]{2}",
+            // Dot-separated EUI-64
+            "([0-9A-Fa-f]{4}\\.){3}[0-9A-Fa-f]{4}"
+        ).collect(Collectors.joining("|", "^(", ")$"))
     );
     private static final int EUI48_HEX_LENGTH = 48 / 4;
     private static final int EUI64_HEX_LENGTH = 64 / 4;