ONOS-574 - Complete REST APIs for flows

- codecs for all objects referenced by flows
- codecs for HostToHost and PointToPoint intents
- standardized on context.codec() rather than direct calls to new codec()

Change-Id: I94fcb6e31a9161132c6efc2793b9c46fa3cc4570
diff --git a/web/api/src/main/java/org/onosproject/codec/impl/EthernetCodec.java b/web/api/src/main/java/org/onosproject/codec/impl/EthernetCodec.java
new file mode 100644
index 0000000..1bacec2
--- /dev/null
+++ b/web/api/src/main/java/org/onosproject/codec/impl/EthernetCodec.java
@@ -0,0 +1,48 @@
+/*
+ * 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.onlab.packet.Ethernet;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Ethernet codec.
+ */
+public class EthernetCodec extends JsonCodec<Ethernet> {
+
+    protected static final Logger log = LoggerFactory.getLogger(CriterionCodec.class);
+
+    @Override
+    public ObjectNode encode(Ethernet ethernet, CodecContext context) {
+        checkNotNull(ethernet, "Ethernet cannot be null");
+
+        return context.mapper().createObjectNode()
+                .put("destinationMacAddress", ethernet.getDestinationMAC().toString())
+                .put("sourceMacAddress", ethernet.getSourceMAC().toString())
+                .put("priorityCode", ethernet.getPriorityCode())
+                .put("vlanId", ethernet.getVlanID())
+                .put("etherType", ethernet.getEtherType())
+                .put("pad", ethernet.isPad());
+    }
+
+}