If date is null, it's excluded

git-svn-id: https://scm.gforge.inria.fr/authscm/ycadoret/svn/gazelle/Maven/gazelle-proxy/trunk@35094 356b4b1a-1d2b-0410-8bf1-ffa24008f01e

gazelle-proxy-ejb/src/main/java/net/ihe/gazelle/proxy/dao/MessageFilterStep.java

@@ -23,7 +23,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 public class MessageFilterStep<T extends AbstractMessage> implements MessageFilter<T> {
-	
+
 	private static Logger log = LoggerFactory.getLogger(MessageFilterStep.class);
 
 	private Step step;
@@ -346,10 +346,11 @@ public class MessageFilterStep<T extends AbstractMessage> implements MessageFilt
 
 		for (int i = 0; i < steps.size();) {
 			for (int j = 1; j < steps.size();) {
-				log.info(""+steps.get(i).getDate());
-				log.info(""+steps.get(j).getDate());
-				if (steps.get(i).getDate().compareTo(steps.get(j).getDate()) >= 0) {
-					if (lastModifDate==null || lastModifDate.compareTo(steps.get(i).getDate()) <= 0) {
+				log.info("" + steps.get(i).getDate());
+				log.info("" + steps.get(j).getDate());
+				if (steps.get(i).getDate() != null && steps.get(j).getDate() != null
+						&& steps.get(i).getDate().compareTo(steps.get(j).getDate()) >= 0) {
+					if (lastModifDate == null || lastModifDate.compareTo(steps.get(i).getDate()) <= 0) {
 						lastModifDate = steps.get(i).getDate();
 					}
 				}