Bugfix for #54: possible null value in PlaneInfoWrapper::getMinPosition (#55)

Author: ppouchin

pom.xml

@@ -9,7 +9,7 @@
 
     <groupId>fr.igred</groupId>
     <artifactId>simple-omero-client</artifactId>
-    <version>5.12.1</version>
+    <version>5.12.2</version>
     <packaging>jar</packaging>
 
     <name>Simple OMERO Client</name>

src/main/java/fr/igred/omero/meta/PlaneInfoWrapper.java

@@ -33,6 +33,7 @@
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Objects;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -143,6 +144,7 @@ public static Length getMinPosition(Collection<? extends PlaneInfoWrapper> plane
         List<Double> positions = planesInfo.stream()
                                            .map(getter)
                                            .map(UnitsFactory::convertLength)
+                                           .filter(Objects::nonNull)
                                            .map(p -> p.value(unit).doubleValue())
                                            .collect(Collectors.toList());
         Double pos = positions.isEmpty() ? 0.0d : Collections.min(positions);