Override toString for flow objectives

Change-Id: I725ca9ac231e21c12f364e1a8bbdc6d3cd1e5a38

@@ -27,6 +27,7 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 
+import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -120,7 +121,6 @@ public final class DefaultFilteringObjective implements FilteringObjective {
         return context;
     }
 
-
     @Override
     public int hashCode() {
         return Objects.hash(type, permanent, timeout, appId, priority, key,
@@ -147,6 +147,23 @@ public final class DefaultFilteringObjective implements FilteringObjective {
         return false;
     }
 
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("id", id())
+                .add("type", type())
+                .add("op", op())
+                .add("priority", priority())
+                .add("key", key())
+                .add("conditions", conditions())
+                .add("meta", meta())
+                .add("appId", appId())
+                .add("permanent", permanent())
+                .add("timeout", timeout())
+                .add("context", context())
+                .toString();
+    }
+
     /**
      * Returns a new builder.
      *

@@ -24,6 +24,7 @@ import org.onosproject.net.flow.TrafficTreatment;
 import java.util.Objects;
 import java.util.Optional;
 
+import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -146,6 +147,23 @@ public final class DefaultForwardingObjective implements ForwardingObjective {
         return false;
     }
 
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("id", id())
+                .add("op", op())
+                .add("priority", priority())
+                .add("selector", selector())
+                .add("treatment", treatment())
+                .add("nextId", nextId())
+                .add("flag", flag())
+                .add("appId", appId())
+                .add("permanent", permanent())
+                .add("timeout", timeout())
+                .add("context", context())
+                .toString();
+    }
+
     /**
      * Returns a new builder.
      *

@@ -26,6 +26,7 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 
+import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -125,6 +126,22 @@ public final class DefaultNextObjective implements NextObjective {
         return false;
     }
 
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("id", id())
+                .add("type", type())
+                .add("op", op())
+                .add("priority", priority())
+                .add("next", next())
+                .add("meta", meta())
+                .add("appId", appId())
+                .add("permanent", permanent())
+                .add("timeout", timeout())
+                .add("context", context())
+                .toString();
+    }
+
     /**
      * Returns a new builder.
      *