diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
index b840318..fa8a64c 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
@@ -55,6 +55,16 @@
     }
 
     @Override
+    public Criterion getCriterion(Criterion.Type type) {
+        for (Criterion c : criteria) {
+            if (c.type() == type) {
+                return c;
+            }
+        }
+        return null;
+    }
+
+    @Override
     public int hashCode() {
         return Objects.hash(criteria);
     }
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
index ab9b4a1..bcaf70c 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
@@ -39,6 +39,15 @@
     Set<Criterion> criteria();
 
     /**
+     * Returns the selection criterion for a particular type, if it exists in
+     * this traffic selector.
+     *
+     * @param type criterion type to look up
+     * @return the criterion of the specified type if one exists, otherwise null
+     */
+    Criterion getCriterion(Criterion.Type type);
+
+    /**
      * Builder of traffic selector entities.
      */
     public interface Builder {
diff --git a/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java b/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
index 1677af6..659a2c4 100644
--- a/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
+++ b/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
@@ -6,12 +6,11 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_ADDED;
+import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_ADD_REQUESTED;
 import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_REMOVED;
+import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_REMOVE_REQUESTED;
 import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_UPDATED;
 
-
-import static org.onlab.onos.net.flow.FlowRuleEvent.Type.*;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -39,6 +38,7 @@
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.device.DeviceListener;
 import org.onlab.onos.net.device.DeviceService;
+import org.onlab.onos.net.flow.BatchOperation;
 import org.onlab.onos.net.flow.CompletedBatchOperation;
 import org.onlab.onos.net.flow.DefaultFlowEntry;
 import org.onlab.onos.net.flow.DefaultFlowRule;
@@ -58,7 +58,6 @@
 import org.onlab.onos.net.flow.TrafficTreatment;
 import org.onlab.onos.net.flow.criteria.Criterion;
 import org.onlab.onos.net.flow.instructions.Instruction;
-import org.onlab.onos.net.flow.BatchOperation;
 import org.onlab.onos.net.provider.AbstractProvider;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.store.trivial.impl.SimpleFlowRuleStore;
@@ -583,6 +582,12 @@
         }
 
         @Override
+        public Criterion getCriterion(
+                org.onlab.onos.net.flow.criteria.Criterion.Type type) {
+            return null;
+        }
+
+        @Override
         public int hashCode() {
             return testval;
         }
@@ -594,6 +599,7 @@
             }
             return false;
         }
+
     }
 
     private class TestTreatment implements TrafficTreatment {
diff --git a/core/net/src/test/java/org/onlab/onos/net/intent/IntentTestsMocks.java b/core/net/src/test/java/org/onlab/onos/net/intent/IntentTestsMocks.java
index 0f020a4..e0e49ef 100644
--- a/core/net/src/test/java/org/onlab/onos/net/intent/IntentTestsMocks.java
+++ b/core/net/src/test/java/org/onlab/onos/net/intent/IntentTestsMocks.java
@@ -1,5 +1,7 @@
 package org.onlab.onos.net.intent;
 
+import static org.onlab.onos.net.NetTestTools.createPath;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -12,12 +14,11 @@
 import org.onlab.onos.net.flow.TrafficSelector;
 import org.onlab.onos.net.flow.TrafficTreatment;
 import org.onlab.onos.net.flow.criteria.Criterion;
+import org.onlab.onos.net.flow.criteria.Criterion.Type;
 import org.onlab.onos.net.flow.instructions.Instruction;
 import org.onlab.onos.net.topology.LinkWeight;
 import org.onlab.onos.net.topology.PathService;
 
-import static org.onlab.onos.net.NetTestTools.createPath;
-
 /**
  * Common mocks used by the intent framework tests.
  */
@@ -30,6 +31,11 @@
         public Set<Criterion> criteria() {
             return new HashSet<>();
         }
+
+        @Override
+        public Criterion getCriterion(Type type) {
+            return null;
+        }
     }
 
     /**