REST API's for tenants, virtual networks, virtual devices ad virtual ports.

Change-Id: I80abe14a083fce3dc6246118af8874028109388f

REST API's for tenants, virtual networks, virtual devices ad virtual ports.

Change-Id: Ib6c3d69d396e57822bae23f5bf3101c8b9c0b95c
diff --git a/core/common/src/main/java/org/onosproject/codec/impl/TenantIdCodec.java b/core/common/src/main/java/org/onosproject/codec/impl/TenantIdCodec.java
new file mode 100644
index 0000000..6d43eb2
--- /dev/null
+++ b/core/common/src/main/java/org/onosproject/codec/impl/TenantIdCodec.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2016 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 com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.incubator.net.virtual.TenantId;
+
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * Codec for the TenantId class.
+ */
+public class TenantIdCodec extends JsonCodec<TenantId> {
+
+    // JSON field names
+    private static final String TENANT_ID = "id";
+
+    private static final String NULL_TENANT_MSG = "TenantId cannot be null";
+    private static final String MISSING_MEMBER_MSG = " member is required in TenantId";
+
+    @Override
+    public ObjectNode encode(TenantId tenantId, CodecContext context) {
+        checkNotNull(tenantId, NULL_TENANT_MSG);
+
+        ObjectNode result = context.mapper().createObjectNode()
+                .put(TENANT_ID, tenantId.id().toString());
+
+        return result;
+    }
+
+    @Override
+    public TenantId decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        TenantId tenantId = TenantId.tenantId(extractMember(TENANT_ID, json));
+
+        return tenantId;
+    }
+
+    private String extractMember(String key, ObjectNode json) {
+        return nullIsIllegal(json.get(key), key + MISSING_MEMBER_MSG).asText();
+    }
+}