adding constaints to intent API
diff --git a/core/api/src/main/java/org/onlab/onos/net/resource/LinkResourceRequest.java b/core/api/src/main/java/org/onlab/onos/net/resource/LinkResourceRequest.java
index a511778..23a0c30 100644
--- a/core/api/src/main/java/org/onlab/onos/net/resource/LinkResourceRequest.java
+++ b/core/api/src/main/java/org/onlab/onos/net/resource/LinkResourceRequest.java
@@ -19,6 +19,7 @@
 import java.util.Set;
 
 import org.onlab.onos.net.Link;
+import org.onlab.onos.net.intent.Constraint;
 import org.onlab.onos.net.intent.IntentId;
 
 /**
@@ -67,6 +68,14 @@
         public Builder addBandwidthRequest(double bandwidth);
 
         /**
+         * Adds the resources required for a constraint.
+         *
+         * @param constraint the constraint
+         * @return self
+         */
+        public Builder addConstraint(Constraint constraint);
+
+        /**
          * Returns link resource request.
          *
          * @return link resource request