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/rest/IntentsWebResource.java b/web/api/src/main/java/org/onosproject/rest/IntentsWebResource.java
new file mode 100644
index 0000000..361859d
--- /dev/null
+++ b/web/api/src/main/java/org/onosproject/rest/IntentsWebResource.java
@@ -0,0 +1,68 @@
+/*
+ * 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.rest;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentId;
+import org.onosproject.net.intent.IntentService;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * REST resource for interacting with the inventory of intents.
+ */
+
+@Path("intents")
+public class IntentsWebResource extends AbstractWebResource {
+    public static final String INTENT_NOT_FOUND = "Intent is not found";
+
+    /**
+     * Gets an array containing all the intents in the system.
+     *
+     * @return array of all the intents in the system
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response getIntents() {
+        final Iterable<Intent> intents = get(IntentService.class).getIntents();
+        final ObjectNode root = encodeArray(Intent.class, "intents", intents);
+        return ok(root.toString()).build();
+    }
+
+    /**
+     * Gets a single intent by Id.
+     *
+     * @param id Id to look up
+     * @return intent data
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    @Path("{id}")
+    public Response getHostById(@PathParam("id") long id) {
+        final Intent intent = nullIsNotFound(get(IntentService.class)
+                        .getIntent(IntentId.valueOf(id)),
+                INTENT_NOT_FOUND);
+        final ObjectNode root = codec(Intent.class).encode(intent, this);
+        return ok(root.toString()).build();
+    }
+}