Merge pull request #250 from ericpohl/develop

Handle exceptions thrown from GuidancePatternMapper.ImportGuidancePattern()

Author: strhea

ISOv4Plugin/Mappers/GuidancePatternMapper.cs

@@ -215,7 +215,10 @@ public IEnumerable<GuidancePattern> ImportGuidancePatterns(IEnumerable<ISOGuidan
             foreach (ISOGuidancePattern isoGuidancePattern in isoGuidancePatterns)
             {
                 GuidancePattern adaptGuidancePattern = ImportGuidancePattern(isoGuidancePattern);
-                adaptGuidancePatterns.Add(adaptGuidancePattern);
+                if (adaptGuidancePattern != null)
+                {
+                    adaptGuidancePatterns.Add(adaptGuidancePattern);
+                }
             }
 
             //Add the patterns to the Catalog
@@ -236,7 +239,13 @@ public GuidancePattern ImportGuidancePattern(ISOGuidancePattern isoGuidancePatte
             GuidancePattern pattern = null;
             LineStringMapper lineStringMapper = new LineStringMapper(TaskDataMapper);
             PointMapper pointMapper = new PointMapper(TaskDataMapper);
-            var isoLineString = isoGuidancePattern.LineString ?? new ISOLineString();
+            ISOLineString isoLineString = isoGuidancePattern.LineString;
+            if ((isoLineString?.Points?.Count ?? 0) == 0)
+            {
+                TaskDataMapper.AddError($"Guidance pattern {isoGuidancePattern.GuidancePatternDesignator} is invalid. Skipping.");
+                return null;
+            }
+
             switch (isoGuidancePattern.GuidancePatternType)
             {
                 case ISOGuidancePatternType.AB: