From e29f6f0589f42950a0826769c909821a6c9ed82b Mon Sep 17 00:00:00 2001
From: Douglas Gillespie <50671166+douggillespie@users.noreply.github.com>
Date: Fri, 22 Dec 2023 13:38:18 +0000
Subject: [PATCH] Fix Effort null pointers

Trap a coupld of null pointer exceptions which get thrown when there are
no acoustic data.
---
 src/tethys/deployment/EffortFunctions.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/tethys/deployment/EffortFunctions.java b/src/tethys/deployment/EffortFunctions.java
index 75184c16..2fd8f383 100644
--- a/src/tethys/deployment/EffortFunctions.java
+++ b/src/tethys/deployment/EffortFunctions.java
@@ -44,6 +44,9 @@ public class EffortFunctions {
 	private DeploymentOverview createOverview(RecordingList tempPeriods) {
 
 		DutyCycleInfo dutyCycleinfo = assessDutyCycle(tempPeriods);
+		if (dutyCycleinfo == null) {
+			return null;
+		}
 
 		// if it's duty cycles, then we only want a single entry. 
 		RecordingList deploymentPeriods;
@@ -274,6 +277,9 @@ public class EffortFunctions {
 	 * @return
 	 */
 	private DutyCycleInfo assessDutyCycle(RecordingList tempPeriods) {
+		if (tempPeriods == null) {
+			return null;
+		}
 		int n = tempPeriods.size();
 		if (n < 2) {
 			return new DutyCycleInfo(false, 0,0,n);