diff --git a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java
index afd561f..ba547ee 100644
--- a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java
+++ b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/SubnetCodec.java
@@ -34,7 +34,7 @@
                 .put("id", subnet.id().toString())
                 .put("gateway_ip", subnet.gatewayIp().toString())
                 .put("network_id", subnet.networkId().toString())
-                .put("name", subnet.subnetName().toString())
+                .put("name", subnet.subnetName())
                 .put("ip_version", subnet.ipVersion().toString())
                 .put("cidr", subnet.cidr().toString())
                 .put("shared", subnet.shared())
diff --git a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/TenantNetworkCodec.java b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/TenantNetworkCodec.java
index 07ae9f8..1d034b5 100644
--- a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/TenantNetworkCodec.java
+++ b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/TenantNetworkCodec.java
@@ -33,7 +33,7 @@
         checkNotNull(network, "Network cannot be null");
         ObjectNode result = context.mapper().createObjectNode()
                 .put("id", network.id().toString())
-                .put("name", network.name().toString())
+                .put("name", network.name())
                 .put("admin_state_up", network.adminStateUp())
                 .put("status", "" + network.state())
                 .put("shared", network.shared())
diff --git a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
index aa3c0c7..423dc27 100644
--- a/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
+++ b/apps/vtnrsc/src/main/java/org/onosproject/vtnrsc/web/VirtualPortCodec.java
@@ -36,16 +36,16 @@
                 .put("id", vPort.portId().toString())
                 .put("network_id", vPort.networkId().toString())
                 .put("admin_state_up", vPort.adminStateUp())
-                .put("name", vPort.name().toString())
+                .put("name", vPort.name())
                 .put("status", vPort.state().toString())
                 .put("mac_address", vPort.macAddress().toString())
                 .put("tenant_id", vPort.tenantId().toString())
                 .put("device_id", vPort.deviceId().toString())
-                .put("device_owner", vPort.deviceOwner().toString())
-                .put("binding:vnic_type", vPort.bindingVnicType().toString())
-                .put("binding:Vif_type", vPort.bindingVifType().toString())
+                .put("device_owner", vPort.deviceOwner())
+                .put("binding:vnic_type", vPort.bindingVnicType())
+                .put("binding:Vif_type", vPort.bindingVifType())
                 .put("binding:host_id", vPort.bindingHostId().toString())
-                .put("binding:vif_details", vPort.bindingVifDetails().toString());
+                .put("binding:vif_details", vPort.bindingVifDetails());
         result.set("allowed_address_pairs", new AllowedAddressPairCodec().encode(
                                                                                vPort.allowedAddressPairs(), context));
         result.set("fixed_ips", new FixedIpCodec().encode(
diff --git a/apps/vtnweb/src/main/java/org/onosproject/vtnweb/resources/TenantNetworkWebResource.java b/apps/vtnweb/src/main/java/org/onosproject/vtnweb/resources/TenantNetworkWebResource.java
index 7a0d43d..9fd75ab 100644
--- a/apps/vtnweb/src/main/java/org/onosproject/vtnweb/resources/TenantNetworkWebResource.java
+++ b/apps/vtnweb/src/main/java/org/onosproject/vtnweb/resources/TenantNetworkWebResource.java
@@ -95,8 +95,7 @@
         while (networkors.hasNext()) {
             TenantNetwork network = networkors.next();
             if ((queryId == null || queryId.equals(network.id().toString()))
-                    && (queryName == null || queryName.equals(network.name()
-                            .toString()))
+                    && (queryName == null || queryName.equals(network.name()))
                     && (queryadminStateUp == null || queryadminStateUp
                             .equals(network.adminStateUp()))
                     && (querystate == null || querystate.equals(network.state()