Add OTN device and ports

Change-Id: I18f3376d1466077e95d7324a27a660302f0123b3
diff --git a/core/api/src/main/java/org/onosproject/net/OtuPort.java b/core/api/src/main/java/org/onosproject/net/OtuPort.java
new file mode 100644
index 0000000..1e4448a
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/OtuPort.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2016 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;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Implementation of OTU port (Optical channel Transport Unit).
+ */
+
+public class OtuPort extends DefaultPort {
+
+    private final OtuSignalType signalType;
+
+    /**
+     * Creates an OTU port in the specified network element.
+     *
+     * @param element           parent network element
+     * @param number            port number
+     * @param isEnabled         port enabled state
+     * @param signalType        OTU signal type
+     * @param annotations       optional key/value annotations
+     */
+    public OtuPort(Element element, PortNumber number, boolean isEnabled,
+            OtuSignalType signalType, Annotations... annotations) {
+        super(element, number, isEnabled, Type.OTU, 0, annotations);
+        this.signalType = signalType;
+    }
+
+    /**
+     * Returns OTU signal type.
+     *
+     * @return OTU signal type
+     */
+    public OtuSignalType signalType() {
+        return signalType;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(number(), isEnabled(), type(), signalType, annotations());
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof OtuPort) {
+            final OtuPort other = (OtuPort) obj;
+            return Objects.equals(this.element().id(), other.element().id()) &&
+                    Objects.equals(this.number(), other.number()) &&
+                    Objects.equals(this.isEnabled(), other.isEnabled()) &&
+                    Objects.equals(this.signalType, other.signalType) &&
+                    Objects.equals(this.annotations(), other.annotations());
+        }
+        return false;
+    }
+
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("element", element().id())
+                .add("number", number())
+                .add("isEnabled", isEnabled())
+                .add("type", type())
+                .add("signalType", signalType)
+                .toString();
+    }
+
+}
\ No newline at end of file
diff --git a/core/api/src/main/java/org/onosproject/net/OtuSignalType.java b/core/api/src/main/java/org/onosproject/net/OtuSignalType.java
new file mode 100644
index 0000000..150249e
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/OtuSignalType.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2016 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;
+
+/**
+ * Represents OTU (Optical channel Transport Unit) signal type.
+ *
+ * <p>
+ * See ITU G.709 "Interfaces for the Optical Transport Network (OTN)" and
+ * Open Networking Foundation "Optical Transport Protocol Extensions Version 1.0".
+ * </p>
+ */
+public enum OtuSignalType {
+    OTU1,
+    OTU2,
+    OTU3,
+    OTU4
+}
\ No newline at end of file
diff --git a/core/api/src/main/java/org/onosproject/net/Port.java b/core/api/src/main/java/org/onosproject/net/Port.java
index d70b1e1..2a3072d 100644
--- a/core/api/src/main/java/org/onosproject/net/Port.java
+++ b/core/api/src/main/java/org/onosproject/net/Port.java
@@ -58,7 +58,12 @@
         /**
          * Signifies virtual port.
          */
-        VIRTUAL
+        VIRTUAL,
+
+        /**
+         * Signifies optical fiber-based OTN port.
+         */
+        OTU
     }
 
     /**
diff --git a/core/api/src/main/java/org/onosproject/net/device/OtuPortDescription.java b/core/api/src/main/java/org/onosproject/net/device/OtuPortDescription.java
new file mode 100644
index 0000000..60f2515
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/device/OtuPortDescription.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2016 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.device;
+
+import com.google.common.base.MoreObjects;
+
+import org.onosproject.net.OtuSignalType;
+import org.onosproject.net.Port;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.SparseAnnotations;
+
+/**
+ * Default implementation of immutable OTU port description.
+ */
+public class OtuPortDescription extends DefaultPortDescription {
+
+    private final OtuSignalType signalType;
+
+    /**
+     * Creates OTU port description based on the supplied information.
+     *
+     * @param number        port number
+     * @param isEnabled     port enabled state
+     * @param signalType    OTU signal type
+     * @param annotations   optional key/value annotations map
+     */
+    public OtuPortDescription(PortNumber number, boolean isEnabled, OtuSignalType signalType,
+            SparseAnnotations... annotations) {
+        super(number, isEnabled, Port.Type.OTU, 0, annotations);
+        this.signalType = signalType;
+    }
+
+    /**
+     * Creates OTU port description based on the supplied information.
+     *
+     * @param base          PortDescription to get basic information from
+     * @param signalType    OTU signal type
+     * @param annotations   optional key/value annotations map
+     */
+    public OtuPortDescription(PortDescription base, OtuSignalType signalType,
+            SparseAnnotations annotations) {
+        super(base, annotations);
+        this.signalType = signalType;
+    }
+
+    /**
+     * Returns OTU signal type.
+     *
+     * @return OTU signal type
+     */
+    public OtuSignalType signalType() {
+        return signalType;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("number", portNumber())
+                .add("isEnabled", isEnabled())
+                .add("type", type())
+                .add("signalType", signalType)
+                .toString();
+    }
+
+}
\ No newline at end of file