GUI -- Added Settings view

Change-Id: Icdabb361bff3ccc3e4d12cb889dd77e62c1519e0
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/SettingsViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/SettingsViewMessageHandler.java
new file mode 100644
index 0000000..ed413fa
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/SettingsViewMessageHandler.java
@@ -0,0 +1,95 @@
+/*
+ * 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.ObjectNode;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.cfg.ComponentConfigService;
+import org.onosproject.cfg.ConfigProperty;
+import org.onosproject.ui.RequestHandler;
+import org.onosproject.ui.UiMessageHandler;
+import org.onosproject.ui.table.TableModel;
+import org.onosproject.ui.table.TableRequestHandler;
+
+import java.util.Collection;
+
+/**
+ * Message handler for component configuration view related messages.
+ */
+public class SettingsViewMessageHandler extends UiMessageHandler {
+
+    private static final String DATA_REQUEST = "settingDataRequest";
+    private static final String DATA_RESPONSE = "settingDataResponse";
+    private static final String SETTINGS = "settings";
+
+    private static final String COMPONENT = "component";
+    private static final String ID = "id";
+    private static final String TYPE = "type";
+    private static final String VALUE = "value";
+    private static final String DEFAULT = "defValue";
+    private static final String DESC = "desc";
+
+    private static final String[] COL_IDS = {
+            COMPONENT, ID, TYPE, VALUE, DEFAULT, DESC
+    };
+
+    @Override
+    protected Collection<RequestHandler> createRequestHandlers() {
+        return ImmutableSet.of(new SettingsRequest());
+    }
+
+    // handler for host table requests
+    private final class SettingsRequest extends TableRequestHandler {
+        private SettingsRequest() {
+            super(DATA_REQUEST, DATA_RESPONSE, SETTINGS);
+        }
+
+        @Override
+        protected String[] getColumnIds() {
+            return COL_IDS;
+        }
+
+        @Override
+        protected String defaultColumnId() {
+            return COMPONENT;
+        }
+
+        @Override
+        protected TableModel createTableModel() {
+            TableModel tm = super.createTableModel();
+            return tm;
+        }
+
+        @Override
+        protected void populateTable(TableModel tm, ObjectNode payload) {
+            ComponentConfigService ccs = get(ComponentConfigService.class);
+            for (String component : ccs.getComponentNames()) {
+                for (ConfigProperty prop : ccs.getProperties(component)) {
+                    populateRow(tm.addRow(), component, prop);
+                }
+            }
+        }
+
+        private void populateRow(TableModel.Row row, String component, ConfigProperty prop) {
+            row.cell(COMPONENT, component)
+                    .cell(ID, prop.name())
+                    .cell(TYPE, prop.type().toString().toLowerCase())
+                    .cell(VALUE, prop.value())
+                    .cell(DEFAULT, prop.defaultValue())
+                    .cell(DESC, prop.description());
+        }
+    }
+}