Implement security group manager, codec and watcher with unit tests

Change-Id: Ib2201d140b9dcb2eff453f13447113bdba66babd
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/cli/KubevirtShowSecurityGroupCommand.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/cli/KubevirtShowSecurityGroupCommand.java
new file mode 100644
index 0000000..4ac752d
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/cli/KubevirtShowSecurityGroupCommand.java
@@ -0,0 +1,95 @@
+/*
+ * 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.cli;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
+import org.apache.karaf.shell.api.action.Option;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.kubevirtnetworking.api.KubevirtSecurityGroup;
+import org.onosproject.kubevirtnetworking.api.KubevirtSecurityGroupRule;
+import org.onosproject.kubevirtnetworking.api.KubevirtSecurityGroupService;
+
+import java.util.List;
+
+import static org.onosproject.kubevirtnetworking.util.KubevirtNetworkingUtil.prettyJson;
+
+/**
+ * Show a detailed security group info.
+ */
+@Service
+@Command(scope = "onos", name = "kubevirt-security-group",
+        description = "Displays a security group details")
+public class KubevirtShowSecurityGroupCommand extends AbstractShellCommand {
+
+    @Option(name = "--name",
+            description = "Filter security group by specific name", multiValued = true)
+    @Completion(KubevirtSecurityGroupCompleter.class)
+    private List<String> names;
+
+    @Override
+    protected void doExecute() throws Exception {
+        KubevirtSecurityGroupService service = get(KubevirtSecurityGroupService.class);
+
+        if (names == null || names.size() == 0) {
+            print("Need to specify at least one security group name using --name option.");
+            return;
+        }
+
+        for (String name : names) {
+            KubevirtSecurityGroup sg = service.securityGroups().stream()
+                    .filter(s -> s.name().equals(name))
+                    .findAny().orElse(null);
+            if (sg == null) {
+                print("Unable to find %s", name);
+                continue;
+            }
+
+            if (outputJson()) {
+                print("%s", json(sg));
+            } else {
+                printSecurityGroup(sg);
+            }
+        }
+    }
+
+    private void printSecurityGroup(KubevirtSecurityGroup sg) {
+        print("Name: %s", sg.name());
+        print("  ID: %s", sg.id());
+        print("  Description: %s", sg.description());
+
+        int counter = 1;
+        for (KubevirtSecurityGroupRule rule : sg.rules()) {
+            print("  Rule #%d:", counter);
+            print("    ID: %s", rule.id());
+            print("    Direction: %s", rule.direction());
+            print("    EtherType: %s", rule.etherType());
+            print("    Protocol: %s", rule.protocol());
+            print("    PortRangeMax: %s", rule.portRangeMax());
+            print("    PortRangeMin: %s", rule.portRangeMin());
+            print("    RemoteIpPrefix: %s", rule.remoteIpPrefix());
+            print("    RemoteGroupID: %s", rule.remoteGroupId());
+            counter++;
+        }
+    }
+
+    private String json(KubevirtSecurityGroup sg) {
+        return prettyJson(new ObjectMapper(),
+                jsonForEntity(sg, KubevirtSecurityGroup.class).toString());
+    }
+}