GUI -- Beginnings of structure for topology Overlay API.
- Re-implemented RequestSummary / ShowSummary in Alt implementation.
Change-Id: Idb86c7bf3ede8f8815abcb488bbf9b0a7041ef79
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/OverlayService.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/OverlayService.java
new file mode 100644
index 0000000..08743ce
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/OverlayService.java
@@ -0,0 +1,41 @@
+/*
+ * 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 org.onosproject.ui.impl.topo.overlay.SummaryGenerator;
+
+/**
+ * Provides the API for external agents to inject topology overlay behavior.
+ */
+public interface OverlayService {
+
+ /**
+ * Registers a custom summary generator for the specified overlay.
+ *
+ * @param overlayId overlay identifier
+ * @param generator generator to register
+ */
+ void addSummaryGenerator(String overlayId, SummaryGenerator generator);
+
+ /**
+ * Unregisters the generator associated with the specified overlay.
+ *
+ * @param overlayId overlay identifier
+ */
+ void removeSummaryGenerator(String overlayId);
+}