adding constaints to intent API
diff --git a/core/api/src/main/java/org/onlab/onos/net/intent/IntentId.java b/core/api/src/main/java/org/onlab/onos/net/intent/IntentId.java
index 8c75397..c4c2752 100644
--- a/core/api/src/main/java/org/onlab/onos/net/intent/IntentId.java
+++ b/core/api/src/main/java/org/onlab/onos/net/intent/IntentId.java
@@ -51,6 +51,15 @@
         this.fingerprint = fingerprint;
     }
 
+    /**
+     * Returns the backing fingerprint.
+     *
+     * @return the fingerprint
+     */
+    public long fingerprint() {
+        return fingerprint;
+    }
+
     @Override
     public int hashCode() {
         return (int) (fingerprint ^ (fingerprint >>> 32));