1 files changed, 38 insertions, 0 deletions
diff --git a/framework/src/onos/core/api/src/main/java/org/onosproject/net/driver/AbstractHandlerBehaviour.java b/framework/src/onos/core/api/src/main/java/org/onosproject/net/driver/AbstractHandlerBehaviour.java
new file mode 100644
index 00000000..66b21ffe
--- /dev/null
+++ b/framework/src/onos/core/api/src/main/java/org/onosproject/net/driver/AbstractHandlerBehaviour.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 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.net.driver;
+
+import static com.google.common.base.Preconditions.checkState;
+
+/**
+ * Base implementation of device driver handler behaviour.
+ */
+public class AbstractHandlerBehaviour
+        extends AbstractBehaviour implements HandlerBehaviour {
+
+    private DriverHandler handler;
+
+    @Override
+    public DriverHandler handler() {
+        return handler;
+    }
+
+    @Override
+    public void setHandler(DriverHandler handler) {
+        checkState(this.handler == null, "Driver handler already set");
+        this.handler = handler;
+    }
+}