diff --git a/src/main/java/net/onrc/onos/api/flowmanager/Flow.java b/src/main/java/net/onrc/onos/api/flowmanager/Flow.java
index 6ea85a1..ae3cb7e 100644
--- a/src/main/java/net/onrc/onos/api/flowmanager/Flow.java
+++ b/src/main/java/net/onrc/onos/api/flowmanager/Flow.java
@@ -1,6 +1,9 @@
 package net.onrc.onos.api.flowmanager;
 
 import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.List;
+
 import net.onrc.onos.api.batchoperation.BatchOperationTarget;
 import net.onrc.onos.core.matchaction.MatchActionOperations;
 import net.onrc.onos.core.matchaction.match.Match;
@@ -40,11 +43,13 @@
     /**
      * Compiles this object to MatchAction operations.
      * <p>
-     * This method is called by FlowManagerModule to create MatchAction operations.
+     * This method is called by FlowManagerModule to create MatchAction
+     * operations.
      *
-     * @return a MatchActionOperations of this flow object
+     * @param op FlowBatchOperation.Operator to be used for compiling this object
+     * @return a list of MatchActionOperations objects to realize this flow
      */
-    public abstract MatchActionOperations compile();
+    public abstract List<MatchActionOperations> compile(FlowBatchOperation.Operator op);
 
     /**
      * Generates a hash code using the FlowId.
diff --git a/src/main/java/net/onrc/onos/api/flowmanager/OpticalPathFlow.java b/src/main/java/net/onrc/onos/api/flowmanager/OpticalPathFlow.java
index 4018a7c..6b94472 100644
--- a/src/main/java/net/onrc/onos/api/flowmanager/OpticalPathFlow.java
+++ b/src/main/java/net/onrc/onos/api/flowmanager/OpticalPathFlow.java
@@ -35,6 +35,15 @@
     }
 
     /**
+     * Gets lambda which is used throughout the path.
+     *
+     * @return lambda which is used throughout the path
+     */
+    public int getLambda() {
+        return lambda;
+    }
+
+    /**
      * Gets traffic filter for this flow.
      * <p>
      * This method only returns wildcard match, because the ingress transponder
@@ -45,17 +54,8 @@
         return (new PacketMatchBuilder()).build();
     }
 
-    /**
-     * Gets lambda which is used throughout the path.
-     *
-     * @return lambda which is used throughout the path
-     */
-    public int getLambda() {
-        return lambda;
-    }
-
     @Override
-    public MatchActionOperations compile() {
+    public List<MatchActionOperations> compile(FlowBatchOperation.Operator op) {
         // TODO Auto-generated method stub
         return null;
     }
diff --git a/src/main/java/net/onrc/onos/api/flowmanager/PacketPathFlow.java b/src/main/java/net/onrc/onos/api/flowmanager/PacketPathFlow.java
index 8a15f3f..b4364c6 100644
--- a/src/main/java/net/onrc/onos/api/flowmanager/PacketPathFlow.java
+++ b/src/main/java/net/onrc/onos/api/flowmanager/PacketPathFlow.java
@@ -40,11 +40,6 @@
         this.idleTimeout = idleTimeout;
     }
 
-    @Override
-    public PacketMatch getMatch() {
-        return match;
-    }
-
     /**
      * Gets idle-timeout value.
      *
@@ -64,7 +59,12 @@
     }
 
     @Override
-    public MatchActionOperations compile() {
+    public PacketMatch getMatch() {
+        return match;
+    }
+
+    @Override
+    public List<MatchActionOperations> compile(FlowBatchOperation.Operator op) {
         // TODO Auto-generated method stub
         return null;
     }
diff --git a/src/main/java/net/onrc/onos/api/flowmanager/SingleDstTreeFlow.java b/src/main/java/net/onrc/onos/api/flowmanager/SingleDstTreeFlow.java
index 92533cb..8ed1fb1 100644
--- a/src/main/java/net/onrc/onos/api/flowmanager/SingleDstTreeFlow.java
+++ b/src/main/java/net/onrc/onos/api/flowmanager/SingleDstTreeFlow.java
@@ -53,17 +53,6 @@
         // TODO: check consistency among ingressPorts, tree, and actions.
     }
 
-    @Override
-    public PacketMatch getMatch() {
-        return match;
-    }
-
-    @Override
-    public MatchActionOperations compile() {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
     /**
      * Gets the ingress ports of the tree.
      *
@@ -90,4 +79,15 @@
     public List<Action> getEgressActions() {
         return actions;
     }
+
+    @Override
+    public PacketMatch getMatch() {
+        return match;
+    }
+
+    @Override
+    public List<MatchActionOperations> compile(FlowBatchOperation.Operator op) {
+        // TODO Auto-generated method stub
+        return null;
+    }
 }
diff --git a/src/main/java/net/onrc/onos/api/flowmanager/SingleSrcTreeFlow.java b/src/main/java/net/onrc/onos/api/flowmanager/SingleSrcTreeFlow.java
index bb896c8..e7bbe05 100644
--- a/src/main/java/net/onrc/onos/api/flowmanager/SingleSrcTreeFlow.java
+++ b/src/main/java/net/onrc/onos/api/flowmanager/SingleSrcTreeFlow.java
@@ -2,6 +2,7 @@
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import java.util.List;
 import java.util.Set;
 
 import net.onrc.onos.core.matchaction.MatchActionOperations;
@@ -45,17 +46,6 @@
         // TODO: check consistency among rootPort, tree, and actions.
     }
 
-    @Override
-    public PacketMatch getMatch() {
-        return match;
-    }
-
-    @Override
-    public MatchActionOperations compile() {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
     /**
      * Gets the ingress port (the root) of the tree.
      *
@@ -82,4 +72,15 @@
     public Set<Pair<Dpid, OutputAction>> getOutputActions() {
         return outputActions;
     }
+
+    @Override
+    public PacketMatch getMatch() {
+        return match;
+    }
+
+    @Override
+    public List<MatchActionOperations> compile(FlowBatchOperation.Operator op) {
+        // TODO Auto-generated method stub
+        return null;
+    }
 }