refactor waveserver. Allow future drivers

Change-Id: I8ca4ed2435d42aaf5d58eb020aa3a6cfd17c6fa4
diff --git a/drivers/ciena/waveserver/src/main/java/org/onosproject/drivers/ciena/waveserver/rest/CienaWaveserverPortAdmin.java b/drivers/ciena/waveserver/src/main/java/org/onosproject/drivers/ciena/waveserver/rest/CienaWaveserverPortAdmin.java
new file mode 100644
index 0000000..d3895c1
--- /dev/null
+++ b/drivers/ciena/waveserver/src/main/java/org/onosproject/drivers/ciena/waveserver/rest/CienaWaveserverPortAdmin.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2016-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.drivers.ciena.waveserver.rest;
+
+import org.onlab.util.Tools;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.PortAdmin;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.slf4j.Logger;
+
+import java.util.concurrent.CompletableFuture;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+
+public class CienaWaveserverPortAdmin extends AbstractHandlerBehaviour
+        implements PortAdmin {
+    private CienaRestDevice restCiena;
+    private final Logger log = getLogger(getClass());
+
+    @Override
+    public CompletableFuture<Boolean> disable(PortNumber number) {
+        try {
+            restCiena = new CienaRestDevice(handler());
+        } catch (NullPointerException e) {
+            log.error("unable to create CienaRestDevice, {}", e);
+            return CompletableFuture.completedFuture(false);
+        }
+        return CompletableFuture.completedFuture(restCiena.disablePort(number));
+    }
+
+    @Override
+    public CompletableFuture<Boolean> enable(PortNumber number) {
+        try {
+            restCiena = new CienaRestDevice(handler());
+        } catch (NullPointerException e) {
+            log.error("unable to create CienaRestDevice, {}", e);
+            return CompletableFuture.completedFuture(false);
+        }
+        return CompletableFuture.completedFuture(restCiena.enablePort(number));
+    }
+
+    @Override
+    public CompletableFuture<Boolean> isEnabled(PortNumber number) {
+        return Tools.exceptionalFuture(
+                new UnsupportedOperationException("isEnabled is not supported"));
+
+    }
+}