GUI -- Preliminary work for converting tabular views to use the shared web-socket rather than via REST. WIP.

Change-Id: I68de98e8df0a2bbcebe15ad9015ce6b4df43d81c
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/DeviceViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/DeviceViewMessageHandler.java
new file mode 100644
index 0000000..0f8e347
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/DeviceViewMessageHandler.java
@@ -0,0 +1,118 @@
+/*
+ * 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.ui.impl;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.net.Device;
+import org.onosproject.net.device.DeviceService;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Message handler for device view related messages.
+ */
+public class DeviceViewMessageHandler extends AbstractTabularViewMessageHandler {
+
+    /**
+     * Creates a new message handler for the device messages.
+     */
+    protected DeviceViewMessageHandler() {
+        super(ImmutableSet.of("deviceDataRequest"));
+    }
+
+    @Override
+    public void process(ObjectNode message) {
+        ObjectNode payload = payload(message);
+        String sortCol = string(payload, "sortCol", "id");
+        String sortDir = string(payload, "sortDir", "asc");
+
+        DeviceService service = get(DeviceService.class);
+        TableRow[] rows = generateTableRows(service);
+        RowComparator rc = new RowComparator(sortCol, RowComparator.direction(sortDir));
+        Arrays.sort(rows, rc);
+        ArrayNode devices = generateArrayNode(rows);
+        ObjectNode rootNode = mapper.createObjectNode();
+        rootNode.set("devices", devices);
+
+        connection().sendMessage("deviceDataResponse", 0, rootNode);
+    }
+
+    private TableRow[] generateTableRows(DeviceService service) {
+        List<TableRow> list = new ArrayList<>();
+        for (Device dev : service.getDevices()) {
+            list.add(new DeviceTableRow(service, dev));
+        }
+        return list.toArray(new TableRow[list.size()]);
+    }
+
+    /**
+     * TableRow implementation for {@link Device devices}.
+     */
+    private static class DeviceTableRow extends AbstractTableRow {
+
+        private static final String ID = "id";
+        private static final String AVAILABLE = "available";
+        private static final String AVAILABLE_IID = "_iconid_available";
+        private static final String TYPE_IID = "_iconid_type";
+        private static final String DEV_ICON_PREFIX = "devIcon_";
+        private static final String ROLE = "role";
+        private static final String MFR = "mfr";
+        private static final String HW = "hw";
+        private static final String SW = "sw";
+        private static final String SERIAL = "serial";
+        private static final String PROTOCOL = "protocol";
+        private static final String CHASSISID = "chassisid";
+
+        private static final String[] COL_IDS = {
+                ID, AVAILABLE, AVAILABLE_IID, TYPE_IID, ROLE,
+                MFR, HW, SW, SERIAL, PROTOCOL, CHASSISID
+        };
+
+        private static final String ICON_ID_ONLINE = "deviceOnline";
+        private static final String ICON_ID_OFFLINE = "deviceOffline";
+
+        public DeviceTableRow(DeviceService service, Device d) {
+            boolean available = service.isAvailable(d.id());
+            String iconId = available ? ICON_ID_ONLINE : ICON_ID_OFFLINE;
+
+            add(ID, d.id().toString());
+            add(AVAILABLE, Boolean.toString(available));
+            add(AVAILABLE_IID, iconId);
+            add(TYPE_IID, getTypeIconId(d));
+            add(ROLE, service.getRole(d.id()).toString());
+            add(MFR, d.manufacturer());
+            add(HW, d.hwVersion());
+            add(SW, d.swVersion());
+            add(SERIAL, d.serialNumber());
+            add(PROTOCOL, d.annotations().value(PROTOCOL));
+            add(CHASSISID, d.chassisId().toString());
+        }
+
+        private String getTypeIconId(Device d) {
+            return DEV_ICON_PREFIX + d.type().toString();
+        }
+
+        @Override
+        protected String[] columnIds() {
+            return COL_IDS;
+        }
+    }
+
+}