Initial implementation of kubevirt network with CRUD ops support

Change-Id: I6a366fcd301e67f62a74fb828eea1ac67f2a2128
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkStore.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkStore.java
new file mode 100644
index 0000000..7452de8
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkStore.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2021-present Open Networking Foundation
+ *
+ * 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.kubevirtnetworking.api;
+
+import org.onosproject.store.Store;
+
+import java.util.Set;
+
+/**
+ * Manages inventory of kubevirt network states; not intended for direct use.
+ */
+public interface KubevirtNetworkStore
+        extends Store<KubevirtNetworkEvent, KubevirtNetworkStoreDelegate> {
+
+    /**
+     * Creates the new kubevirt network.
+     *
+     * @param network kubevirt network
+     */
+    void createNetwork(KubevirtNetwork network);
+
+    /**
+     * Update the kubevirt network.
+     *
+     * @param network kubevirt network
+     */
+    void updateNetwork(KubevirtNetwork network);
+
+    /**
+     * Removes the kubevirt network with the given network identifier.
+     *
+     * @param networkId network identifier
+     * @return removed kubevirt network; null if failed
+     */
+    KubevirtNetwork removeNetwork(String networkId);
+
+    /**
+     * Returns the kubevirt network with the given network identifier.
+     *
+     * @param networkId network identifier
+     * @return network; null if not found
+     */
+    KubevirtNetwork network(String networkId);
+
+    /**
+     * Returns all kubevirt networks.
+     *
+     * @return set of kubevirt networks
+     */
+    Set<KubevirtNetwork> networks();
+
+    /**
+     * Removes all kubevirt networks.
+     */
+    void clear();
+}