--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/mpiwg/itgroup/ismi/utils/ISMIUtils.java	Wed Oct 29 14:00:28 2014 +0000
@@ -0,0 +1,59 @@
+package de.mpiwg.itgroup.ismi.utils;
+
+import java.util.List;
+
+import de.mpiwg.itgroup.ismi.util.guiComponents.Reference;
+
+public class ISMIUtils {
+
+	public static boolean replaceRef(List<SelectableObject<Reference>> list, Reference old, Reference newRef){
+		if(newRef != null){
+			for(SelectableObject<Reference> so : list ){
+				Reference ref = so.getObj();
+				if(ref != null && old.equals(ref)){
+					//replacing
+					so.setObj(newRef);
+					return true;
+				}
+			}	
+		}
+		//adding in any case
+		list.add(new SelectableObject<Reference>(newRef));		
+		return false;
+	}
+	
+	public static boolean listContainsObj(List<SelectableObject<Reference>> list, Object obj){
+		if(obj != null){
+			for(SelectableObject<Reference> so : list ){
+				Reference oInList = so.getObj();
+				if(oInList != null && obj.equals(oInList)){
+					return true;
+				}
+			}	
+		}
+		return false;
+	}
+	
+	public static boolean removeObjFromList(List<SelectableObject<Reference>> list, Reference obj){
+		
+		if(obj != null){
+			for(SelectableObject<Reference> so : list ){
+				Reference oInList = so.getObj();
+				if(oInList != null && obj.equals(oInList)){
+					list.remove(so);
+					return true;
+				}
+			}	
+		}
+		
+		return false;
+	}
+	
+	public static boolean add2List(List<SelectableObject<Reference>> list, Reference obj){
+		if(!listContainsObj(list, obj)){
+			list.add(new SelectableObject<Reference>(obj));
+			return true;
+		}
+		return false;
+	}	
+}