Fix potential class cast exception

diff --git a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/derivateSearch/DerivateContentProvider.java b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/derivateSearch/DerivateContentProvider.java
index 65efef6d075eeec5e9cadf4f655ef02734a5e546..27b80b47a68ad4948ec1c0ad5a34a2800b121a9d 100644 (file)
--- a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/derivateSearch/DerivateContentProvider.java
+++ b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/derivateSearch/DerivateContentProvider.java
@@ -1,6 +1,7 @@
 package eu.etaxonomy.taxeditor.view.derivateSearch;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
@@ -45,8 +46,8 @@ public class DerivateContentProvider implements ITreeContentProvider {
        @Override
        public Object[] getElements(Object inputElement) {
            rootNodes = new ArrayList<TreeNode>();
-           if(inputElement instanceof Set){
-               for (Object o: (Set)inputElement) {
+           if(inputElement instanceof Collection){
+               for (Object o: (Collection)inputElement) {
                    if(o instanceof SpecimenOrObservationBase){
                        SpecimenOrObservationBase<?> rootElement = (SpecimenOrObservationBase<?>)o;
                        if(rootElement!=null){