CORD-12:Adding support for port statistics REST API

Change-Id: Ibf0f7848ed891500e797d8f66bf7cd785b41c29c
diff --git a/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java b/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
index 3433b3b..c7af4e5 100644
--- a/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
+++ b/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
@@ -38,6 +38,7 @@
 import org.onosproject.net.flow.FlowEntry;
 import org.onosproject.net.flow.FlowRule;
 import org.onosproject.net.flow.TableStatisticsEntry;
+import org.onosproject.net.device.PortStatistics;
 import org.onosproject.net.flow.TrafficSelector;
 import org.onosproject.net.flow.TrafficTreatment;
 import org.onosproject.net.flow.criteria.Criterion;
@@ -102,6 +103,7 @@
         registerCodec(GroupBucket.class, new GroupBucketCodec());
         registerCodec(Load.class, new LoadCodec());
         registerCodec(TableStatisticsEntry.class, new TableStatisticsEntryCodec());
+        registerCodec(PortStatistics.class, new PortStatisticsCodec());
         log.info("Started");
     }
 
diff --git a/core/common/src/main/java/org/onosproject/codec/impl/FlowEntryCodec.java b/core/common/src/main/java/org/onosproject/codec/impl/FlowEntryCodec.java
index 923bdf2..3f581be 100644
--- a/core/common/src/main/java/org/onosproject/codec/impl/FlowEntryCodec.java
+++ b/core/common/src/main/java/org/onosproject/codec/impl/FlowEntryCodec.java
@@ -39,6 +39,7 @@
 
         final ObjectNode result = context.mapper().createObjectNode()
                 .put("id", Long.toString(flowEntry.id().value()))
+                .put("tableId", flowEntry.tableId())
                 .put("appId", service.getAppId(flowEntry.appId()).name())
                 .put("groupId", flowEntry.groupId().id())
                 .put("priority", flowEntry.priority())
diff --git a/core/common/src/main/java/org/onosproject/codec/impl/PortStatisticsCodec.java b/core/common/src/main/java/org/onosproject/codec/impl/PortStatisticsCodec.java
new file mode 100644
index 0000000..e8b3c4c
--- /dev/null
+++ b/core/common/src/main/java/org/onosproject/codec/impl/PortStatisticsCodec.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.codec.impl;
+
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.device.PortStatistics;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Port statistics entry JSON codec.
+ */
+public final class PortStatisticsCodec extends JsonCodec<PortStatistics> {
+
+    @Override
+    public ObjectNode encode(PortStatistics entry, CodecContext context) {
+        checkNotNull(entry, "Port Statistics cannot be null");
+
+        final ObjectNode result = context.mapper().createObjectNode()
+                .put("port", entry.port())
+                .put("packetsReceived", entry.packetsReceived())
+                .put("packetsSent", entry.packetsSent())
+                .put("bytesReceived", entry.bytesReceived())
+                .put("bytesSent", entry.bytesSent())
+                .put("packetsRxDropped", entry.packetsRxDropped())
+                .put("packetsTxDropped", entry.packetsTxDropped())
+                .put("packetsRxErrors", entry.packetsRxErrors())
+                .put("packetsTxErrors", entry.packetsTxErrors())
+                .put("durationSec", entry.durationSec());
+
+        return result;
+    }
+
+}
+