GUI -- Major re-write of server-side Topology View code. WIP.
Change-Id: I332e8e59dc2271d3897c3a5c2fafa775324ef72d
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/MetaDb.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/MetaDb.java
new file mode 100644
index 0000000..f890137
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+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/MetaDb.java
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+/*
+ * 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.topo;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * A database of meta information stored for topology objects.
+ */
+// package private
+class MetaDb {
+
+ private static Map<String, ObjectNode> metaCache = new ConcurrentHashMap<>();
+
+ /**
+ * Adds meta UI information about the specified object to the given payload.
+ *
+ * @param id object identifier
+ * @param payload payload to which the info should be added
+ */
+ public void addMetaUi(String id, ObjectNode payload) {
+ ObjectNode meta = metaCache.get(id);
+ if (meta != null) {
+ payload.set("metaUi", meta);
+ }
+ }
+}