Implement GET REST API for intents
- GET /intent and GET /intent/id implemented
- Basic codec for Intents
- Unit tests

Change-Id: Idbe59d4f7a792c88c77d6f3498d01d4cb7c4467d
diff --git a/web/api/src/main/java/org/onosproject/codec/impl/IntentCodec.java b/web/api/src/main/java/org/onosproject/codec/impl/IntentCodec.java
new file mode 100644
index 0000000..c999757
--- /dev/null
+++ b/web/api/src/main/java/org/onosproject/codec/impl/IntentCodec.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2014 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.NetworkResource;
+import org.onosproject.net.intent.Intent;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Intent JSON codec.
+ */
+public class IntentCodec extends JsonCodec<Intent> {
+
+    @Override
+    public ObjectNode encode(Intent intent, CodecContext context) {
+        checkNotNull(intent, "Intent cannot be null");
+        final ObjectNode result = context.mapper().createObjectNode()
+                .put("type", intent.getClass().getSimpleName())
+                .put("id", intent.id().toString())
+                .put("appId", intent.appId().toString())
+                .put("details", intent.toString());
+
+        final ArrayNode jsonResources = result.putArray("resources");
+
+        if (intent.resources() != null) {
+            for (final NetworkResource resource : intent.resources()) {
+                jsonResources.add(resource.toString());
+            }
+        }
+        return result;
+    }
+}