From 771d6d13abc419ce5beb4287ca6a3b726f12a79f Mon Sep 17 00:00:00 2001
From: "Keith W. Boone" <kboone@ainq.com>
Date: Tue, 19 Nov 2024 22:56:00 -0500
Subject: [PATCH] NPE fix

---
 src/main/java/gov/cdc/izgateway/utils/HL7Utils.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/gov/cdc/izgateway/utils/HL7Utils.java b/src/main/java/gov/cdc/izgateway/utils/HL7Utils.java
index 74a891f..4e012c0 100644
--- a/src/main/java/gov/cdc/izgateway/utils/HL7Utils.java
+++ b/src/main/java/gov/cdc/izgateway/utils/HL7Utils.java
@@ -247,6 +247,9 @@ public static String maskSegments(String message) {
 		// Identify segment starts in text messages using the case sensitive pattern /[^a-zA-Z0-9][A-Z]{3}\|/
 		// (a non-alphanumeric character, followed by three uppercase alphabetic characters followed by a vertical bar |).
 		// identify segment ends at either \r or \n or next segment start.
+		if (message == null) {
+			return null;
+		}
 		Matcher m = HL7Utils.SEGMENT_STARTS.matcher(message);
 		StringBuffer b = new StringBuffer();
 		for (boolean result = m.find(); result; result = m.find()) {