Bug 3244 - SFC Improvements for distributed classifier, robustness

[groupbasedpolicy.git] / renderers / ofoverlay / src / main / java / org / opendaylight / groupbasedpolicy / renderer / ofoverlay / flow / FlowIdUtils.java

diff --git a/renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/FlowIdUtils.java b/renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/FlowIdUtils.java
index 51d38f49a06504a540efca3040d8a4e4fa64e445..0f10741a8dd50379c8aa90a1a8c41044329433ac 100755 (executable)
--- a/renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/FlowIdUtils.java
+++ b/renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/flow/FlowIdUtils.java
@@ -2,6 +2,8 @@ package org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow;
 
 import com.google.common.base.Joiner;
 import com.google.common.base.Strings;
+
+import org.apache.commons.lang3.StringUtils;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.Match;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowplugin.extension.general.rev140714.GeneralAugMatchNodesNodeTableFlow;
@@ -49,6 +51,9 @@ public class FlowIdUtils {
     }
 
     private static String formatMatch(Match match) {
+        if (match == null) {
+            return StringUtils.EMPTY;
+        }
         StringBuilder builder = new StringBuilder(MATCH_PREFIX);
         boolean first = true;
         if (match.getEthernetMatch() != null) {