Implement GET REST API for intents

- GET /intent and GET /intent/id implemented
- Basic codec for Intents
- Unit tests

Change-Id: Idbe59d4f7a792c88c77d6f3498d01d4cb7c4467d

@@ -29,6 +29,7 @@ import org.onosproject.net.Host;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
 import org.onosproject.net.Port;
+import org.onosproject.net.intent.Intent;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -57,6 +58,7 @@ public class CodecManager implements CodecService {
         registerCodec(Link.class, new LinkCodec());
         registerCodec(Host.class, new HostCodec());
         registerCodec(HostLocation.class, new HostLocationCodec());
+        registerCodec(Intent.class, new IntentCodec());
         log.info("Started");
     }
 

+/*
+ * 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;
+    }
+}

+/*
+ * 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();
+    }
+}

@@ -38,6 +38,7 @@
                 org.onosproject.rest.DevicesWebResource,
                 org.onosproject.rest.LinksWebResource,
                 org.onosproject.rest.HostsWebResource,
+                org.onosproject.rest.IntentsWebResource,
                 org.onosproject.rest.ConfigResource
             </param-value>
         </init-param>