[ONOS-8012] Add a set of interface for Kubernetes network policy

Change-Id: I5610def14c064cec1230594278081ad1d13a8a0e
diff --git a/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java
new file mode 100644
index 0000000..2c5bb48
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+++ b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sNetworkPolicyAdminService.java
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+/*
+ * Copyright 2019-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.k8snetworking.api;
+
+import io.fabric8.kubernetes.api.model.networking.NetworkPolicy;
+
+/**
+ * Service for administering the inventory of kubernetes network policy.
+ */
+public interface K8sNetworkPolicyAdminService extends K8sNetworkPolicyService {
+
+    /**
+     * Creates a kubernetes network policy with the given information.
+     *
+     * @param networkPolicy the new kubernetes network policy
+     */
+    void createNetworkPolicy(NetworkPolicy networkPolicy);
+
+    /**
+     * Updates a kubernetes network policy with the given information.
+     *
+     * @param networkPolicy the updated kubernetes network policy
+     */
+    void updateNetworkPolicy(NetworkPolicy networkPolicy);
+
+    /**
+     * Removes the kubernetes network policy.
+     *
+     * @param uid kubernetes network policy UID
+     */
+    void removeNetworkPolicy(String uid);
+
+    /**
+     * Clears the existing kubernetes network policies.
+     */
+    void clear();
+}