[ONOS-3391] create arp_spa selector to onos

Change-Id: I2508a3ca7acb95b9792f0b23e085074a5b030a3b
diff --git a/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java b/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
index c45f160..554b8e7 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
@@ -520,6 +520,16 @@
     }
 
     /**
+     * Creates a match on IPv4 source field using the specified value.
+     *
+     * @param ip ipv4 source value
+     * @return match criterion
+     */
+    public static Criterion matchArpSpa(Ip4Address ip) {
+        return new ArpPaCriterion(ip, Type.ARP_SPA);
+    }
+
+    /**
      * Creates a match on MAC destination field using the specified value.
      *
      * @param mac MAC destination value