ONOS-5629: Enable encapsulation in SDN-IP

Change-Id: I4c3dbe877fd009302938b228fc9af40225d75329
diff --git a/apps/sdnip/src/main/java/org/onosproject/sdnip/cli/completer/SdnIpEncapCompleter.java b/apps/sdnip/src/main/java/org/onosproject/sdnip/cli/completer/SdnIpEncapCompleter.java
new file mode 100644
index 0000000..bd3a49c
--- /dev/null
+++ b/apps/sdnip/src/main/java/org/onosproject/sdnip/cli/completer/SdnIpEncapCompleter.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015-present 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.sdnip.cli.completer;
+
+import org.onosproject.cli.AbstractChoicesCompleter;
+import org.onosproject.net.EncapsulationType;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * SDN-IP encapsulation type completer.
+ */
+public class SdnIpEncapCompleter extends AbstractChoicesCompleter {
+
+    @Override
+    public List<String> choices() {
+        return Arrays.stream(EncapsulationType.values())
+                .map(Enum::toString)
+                .collect(Collectors.toList());
+    }
+}