Power config consolidation Palc

Change-Id: Ia3469ded1822146f61760fc2779baedece8f01b4
diff --git a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/AdvaTerminalDevicePowerConfig.java b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/AdvaTerminalDevicePowerConfig.java
index e76df4e..17eaf92 100644
--- a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/AdvaTerminalDevicePowerConfig.java
+++ b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/AdvaTerminalDevicePowerConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-present Open Networking Foundation
+ * Copyright 2019-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.
@@ -19,447 +19,73 @@
 package org.onosproject.drivers.odtn;
 
 import com.google.common.collect.Range;
-import org.apache.commons.configuration.ConfigurationException;
-import org.apache.commons.configuration.HierarchicalConfiguration;
-import org.apache.commons.configuration.XMLConfiguration;
-import org.apache.commons.configuration.tree.xpath.XPathExpressionEngine;
-import org.onlab.osgi.DefaultServiceDirectory;
-import org.onosproject.drivers.utilities.XmlConfigParser;
-import org.onosproject.net.DeviceId;
+import org.onosproject.drivers.odtn.openconfig.TerminalDevicePowerConfig;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.behaviour.PowerConfig;
-import org.onosproject.net.device.DeviceService;
-import org.onosproject.net.driver.AbstractHandlerBehaviour;
-import org.onosproject.netconf.DatastoreId;
-import org.onosproject.netconf.NetconfController;
-import org.onosproject.netconf.NetconfDevice;
-import org.onosproject.netconf.NetconfException;
-import org.onosproject.netconf.NetconfSession;
 import org.slf4j.Logger;
 
-import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Optional;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
 
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Driver Implementation of the PowerConfig for OpenConfig terminal devices.
  */
 public class AdvaTerminalDevicePowerConfig<T>
-        extends AbstractHandlerBehaviour implements PowerConfig<T> {
-
-    private static final String RPC_TAG_NETCONF_BASE =
-            "<rpc xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">";
-
-    private static final String RPC_CLOSE_TAG = "</rpc>";
+        extends TerminalDevicePowerConfig<T> implements PowerConfig<T> {
 
     private static final Logger log = getLogger(AdvaTerminalDevicePowerConfig.class);
 
-    private ComponentType state = ComponentType.DIRECTION;
+    /**
+     * Getting target value of output power.
+     * @param port port
+     * @param component the component
+     * @return target output power range
+     */
+    @Override
+    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
+        double targetMin = -30;
+        double targetMax = 1;
+        return Optional.of(Range.open(targetMin, targetMax));
+    }
+
+    @Override
+    public Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
+        double targetMin = -30;
+        double targetMax = 1;
+        return Optional.of(Range.open(targetMin, targetMax));
+    }
 
     /**
-     * Returns the NetconfSession with the device for which the method was called.
+     * Construct a rpc target power message.
      *
-     * @param deviceId device indetifier
-     * @return The netconf session or null
-     */
-    private NetconfSession getNetconfSession(DeviceId deviceId) {
-        NetconfController controller = handler().get(NetconfController.class);
-        NetconfDevice ncdev = controller.getDevicesMap().get(deviceId);
-        if (ncdev == null) {
-            log.trace("No netconf device, returning null session");
-            return null;
-        }
-        return ncdev.getSession();
-    }
-
-    /**
-     * Get the deviceId for which the methods apply.
-     *
-     * @return The deviceId as contained in the handler data
-     */
-    private DeviceId did() {
-        return handler().data().deviceId();
-    }
-
-    /**
-     * Execute RPC request.
-     *
-     * @param session Netconf session
-     * @param message Netconf message in XML format
-     * @return XMLConfiguration object
-     */
-
-    private XMLConfiguration executeRpc(NetconfSession session, String message) {
-        try {
-            if (log.isDebugEnabled()) {
-                try {
-                    StringWriter stringWriter = new StringWriter();
-                    XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(message);
-                    xconf.setExpressionEngine(new XPathExpressionEngine());
-                    xconf.save(stringWriter);
-                    log.debug("Request {}", stringWriter.toString());
-                } catch (ConfigurationException e) {
-                    log.error("XML Config Exception ", e);
-                }
-            }
-            CompletableFuture<String> fut = session.rpc(message);
-            String rpcReply = fut.get();
-            XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(rpcReply);
-            xconf.setExpressionEngine(new XPathExpressionEngine());
-            if (log.isDebugEnabled()) {
-                try {
-                    StringWriter stringWriter = new StringWriter();
-                    xconf.save(stringWriter);
-                    log.debug("Response {}", stringWriter.toString());
-                } catch (ConfigurationException e) {
-                    log.error("XML Config Exception ", e);
-                }
-            }
-            return xconf;
-        } catch (NetconfException ne) {
-            log.error("Exception on Netconf protocol: {}.", ne);
-        } catch (InterruptedException ie) {
-            log.error("Interrupted Exception: {}.", ie);
-        } catch (ExecutionException ee) {
-            log.error("Concurrent Exception while executing Netconf operation: {}.", ee);
-        }
-        return null;
-    }
-
-    /**
-     * Get the target-output-power value on specific optical-channel.
-     *
-     * @param port      the port
-     * @param component the port component. It should be 'oc-name' in the Annotations of Port.
-     *                  'oc-name' could be mapped to '/component/name' in openconfig yang.
-     * @return target power value
+     * @param name for optical channel name
+     * @param power to build rpc for target output power configuration
+     * @return RPC payload
      */
     @Override
-    public Optional<Double> getTargetPower(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPower(port, component);
-    }
-
-    @Override
-    public void setTargetPower(PortNumber port, T component, double power) {
-        checkState(component);
-        state.setTargetPower(port, component, power);
-    }
-
-    @Override
-    public Optional<Double> currentPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentPower(port, component);
-    }
-
-  @Override
-  public Optional<Double> currentInputPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentInputPower(port, component);
-    }
-
-    @Override
-    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPowerRange(port, component);
-    }
-
-    @Override
-   public Optional<Range<Double>> getInputPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getInputPowerRange(port, component);
-    }
-
-    @Override
-    public List<PortNumber> getPorts(T component) {
-        checkState(component);
-        return state.getPorts(component);
-    }
-
-
-    /**
-     * Set the ComponentType to invoke proper methods for different template T.
-     *
-     * @param component the component.
-     */
-    void checkState(Object component) {
-        String clsName = component.getClass().getName();
-        switch (clsName) {
-            case "org.onosproject.net.Direction":
-                state = ComponentType.DIRECTION;
-                break;
-            case "org.onosproject.net.OchSignal":
-                state = ComponentType.OCHSIGNAL;
-                break;
-            default:
-                log.error("Cannot parse the component type {}.", clsName);
-                log.info("The component content is {}.", component.toString());
-        }
-        state.adva = this;
-    }
-
-    /**
-     * Component type.
-     */
-    enum ComponentType {
-
-        /**
-         * Direction.
-         */
-        DIRECTION() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        },
-
-        /**
-         * OchSignal.
-         */
-        OCHSIGNAL() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        };
-
-
-        AdvaTerminalDevicePowerConfig adva;
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component component
-         * @return target power
-         */
-        Optional<Double> getTargetPower(PortNumber port, Object component) {
-            NetconfSession session = adva.getNetconfSession(adva.did());
-            checkNotNull(session);
-            String filter = parsePort(adva, port, null, null);
-            StringBuilder rpcReq = new StringBuilder();
-            rpcReq.append(RPC_TAG_NETCONF_BASE)
-                    .append("<get-config>")
-                    .append("<source>")
-                    .append("<" + DatastoreId.RUNNING + "/>")
-                    .append("</source>")
-                    .append("<filter type='subtree'>")
-                    .append(filter)
-                    .append("</filter>")
-                    .append("</get-config>")
-                    .append(RPC_CLOSE_TAG);
-            XMLConfiguration xconf = adva.executeRpc(session, rpcReq.toString());
-            if (xconf == null) {
-                log.error("Error in executingRpc");
-                return Optional.empty();
-            }
-            try {
-                HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/config");
-                if (config == null || config.getString("target-output-power") == null) {
-                    return Optional.empty();
-                }
-                double power = Float.valueOf(config.getString("target-output-power")).doubleValue();
-                return Optional.of(power);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component component
-         * @param power     target value
-         */
-        void setTargetPower(PortNumber port, Object component, double power) {
-            NetconfSession session = adva.getNetconfSession(adva.did());
-            checkNotNull(session);
-            String editConfig = parsePort(adva, port, null, power);
-            StringBuilder rpcReq = new StringBuilder();
-            rpcReq.append(RPC_TAG_NETCONF_BASE)
-                    .append("<edit-config>")
-                    .append("<target><" + DatastoreId.CANDIDATE + "/></target>")
-                    .append("<config>")
-                    .append(editConfig)
+    public StringBuilder parsePortRequestRpc(Double power, String name) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<component>");
+        if (power != null) {
+            // This is an edit-config operation.
+            rpc.append("<config>")
+                    .append("<name>")
+                    .append(name)
+                    .append("</name>")
                     .append("</config>")
-                    .append("</edit-config>")
-                    .append(RPC_CLOSE_TAG);
-            log.info("Setting power {}", rpcReq.toString());
-            XMLConfiguration xconf = adva.executeRpc(session, rpcReq.toString());
-            // The successful reply should be "<rpc-reply ...><ok /></rpc-reply>"
-            if (!xconf.getRoot().getChild(0).getName().equals("ok")) {
-                log.error("The <edit-config> operation to set target-output-power of Port({}:{}) is failed.",
-                        port.toString(), component.toString());
-            }
-            try {
-                session.commit();
-            } catch (NetconfException e) {
-                log.error("error committing channel power", e);
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component the component.
-         * @return current output power.
-         */
-        Optional<Double> currentPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    adva, port, "<output-power><instant/></output-power>");
-            try {
-               HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/state/output-power");
-                if (config == null || config.getString("instant") == null) {
-                    return Optional.empty();
-               }
-                double currentPower = Float.valueOf(config.getString("instant")).doubleValue();
-                return Optional.of(currentPower);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component the component
-         * @return current input power
-         */
-        Optional<Double> currentInputPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    adva, port, "<input-power><instant/></input-power>");
-            try {
-                HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/state/input-power");
-                if (config == null || config.getString("instant") == null) {
-                    return Optional.empty();
-               }
-               double currentPower = Float.valueOf(config.getString("instant")).doubleValue();
-               return Optional.of(currentPower);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-         }
-
-        Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
-            double targetMin = -30;
-            double targetMax = 1;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
-            double targetMin = -30;
-            double targetMax = 1;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        List<PortNumber> getPorts(Object component) {
-            // FIXME
-            log.warn("Not Implemented Yet!");
-            return new ArrayList<PortNumber>();
-        }
-
-        /**
-         * Get filtered content under <optical-channel><state>.
-         *
-         * @param pc         power config instance
-         * @param port       the port number
-         * @param underState the filter condition
-         * @return RPC reply
-         */
-        private static XMLConfiguration getOpticalChannelState(AdvaTerminalDevicePowerConfig pc,
-                                                               PortNumber port, String underState) {
-            NetconfSession session = pc.getNetconfSession(pc.did());
-            checkNotNull(session);
-            String name = ocName(pc, port);
-            StringBuilder rpcReq = new StringBuilder(RPC_TAG_NETCONF_BASE);
-            rpcReq.append("<get><filter><components xmlns=\"http://openconfig.net/yang/platform\"><component>")
-                    .append("<name>").append(name).append("</name>")
                     .append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
-                    .append("<state>")
-                    .append(underState)
-                    .append("</state></optical-channel></component></components></filter></get>")
-                    .append(RPC_CLOSE_TAG);
-            XMLConfiguration xconf = pc.executeRpc(session, rpcReq.toString());
-            return xconf;
+                    .append("<config>")
+                    .append("<target-output-power>")
+                    .append(power)
+                    .append("</target-output-power>")
+                    .append("</config>")
+                    .append("</optical-channel>");
+        } else {
+            rpc.append("<name>")
+                    .append(name)
+                    .append("</name>");
         }
-
-
-        /**
-         * Extract component name from portNumber's annotations.
-         *
-         * @param pc         power config instance
-         * @param portNumber the port number
-         * @return the component name
-         */
-        private static String ocName(AdvaTerminalDevicePowerConfig pc, PortNumber portNumber) {
-            DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
-            DeviceId deviceId = pc.handler().data().deviceId();
-            return deviceService.getPort(deviceId, portNumber).annotations().value("oc-name");
-        }
-
-
-        /**
-         * Parse filtering string from port and component.
-         *
-         * @param portNumber Port Number
-         * @param component  port component (optical-channel)
-         * @param power      power value set.
-         * @return filtering string in xml format
-         */
-        private static String parsePort(AdvaTerminalDevicePowerConfig pc, PortNumber portNumber,
-                                        Object component, Double power) {
-            if (component == null) {
-                String name = ocName(pc, portNumber);
-                StringBuilder sb = new StringBuilder("<components xmlns=\"http://openconfig.net/yang/platform\">");
-                sb.append("<component>");
-                if (power != null) {
-                    // This is an edit-config operation.
-                    sb.append("<config>")
-                            .append("<name>")
-                            .append(name)
-                            .append("</name>")
-                            .append("</config>")
-                            .append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
-                            .append("<config>")
-                            .append("<target-output-power>")
-                            .append(power)
-                            .append("</target-output-power>")
-                            .append("</config>")
-                            .append("</optical-channel>");
-                } else {
-                        sb.append("<name>")
-                        .append(name)
-                        .append("</name>");
-                }
-
-                sb.append("</component>").append("</components>");
-                return sb.toString();
-            } else {
-                log.error("Cannot process the component {}.", component.getClass());
-                return null;
-            }
-        }
+        return rpc;
     }
 }
diff --git a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/CassiniTerminalDevicePowerConfig.java b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/CassiniTerminalDevicePowerConfig.java
index f0f5d3a..aa0955e 100644
--- a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/CassiniTerminalDevicePowerConfig.java
+++ b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/CassiniTerminalDevicePowerConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-present Open Networking Foundation
+ * Copyright 2019-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.
@@ -19,437 +19,35 @@
 package org.onosproject.drivers.odtn;
 
 import com.google.common.collect.Range;
-import org.apache.commons.configuration.ConfigurationException;
-import org.apache.commons.configuration.HierarchicalConfiguration;
-import org.apache.commons.configuration.XMLConfiguration;
-import org.apache.commons.configuration.tree.xpath.XPathExpressionEngine;
-import org.onlab.osgi.DefaultServiceDirectory;
-import org.onosproject.drivers.utilities.XmlConfigParser;
-import org.onosproject.net.DeviceId;
+import org.onosproject.drivers.odtn.openconfig.TerminalDevicePowerConfig;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.behaviour.PowerConfig;
-import org.onosproject.net.device.DeviceService;
-import org.onosproject.net.driver.AbstractHandlerBehaviour;
-import org.onosproject.netconf.DatastoreId;
-import org.onosproject.netconf.NetconfController;
-import org.onosproject.netconf.NetconfDevice;
-import org.onosproject.netconf.NetconfException;
-import org.onosproject.netconf.NetconfSession;
-import org.slf4j.Logger;
 
-import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Optional;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Driver Implementation of the PowerConfig for OpenConfig terminal devices.
  */
 public class CassiniTerminalDevicePowerConfig<T>
-        extends AbstractHandlerBehaviour implements PowerConfig<T> {
-
-    private static final String RPC_TAG_NETCONF_BASE =
-            "<rpc xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">";
-
-    private static final String RPC_CLOSE_TAG = "</rpc>";
-
-    private static final Logger log = getLogger(CassiniTerminalDevicePowerConfig.class);
-
-    private ComponentType state = ComponentType.DIRECTION;
-
+        extends TerminalDevicePowerConfig<T> implements PowerConfig<T> {
     /**
-     * Returns the NetconfSession with the device for which the method was called.
-     *
-     * @param deviceId device indetifier
-     * @return The netconf session or null
-     */
-    private NetconfSession getNetconfSession(DeviceId deviceId) {
-        NetconfController controller = handler().get(NetconfController.class);
-        NetconfDevice ncdev = controller.getDevicesMap().get(deviceId);
-        if (ncdev == null) {
-            log.trace("No netconf device, returning null session");
-            return null;
-        }
-        return ncdev.getSession();
-    }
-
-    /**
-     * Get the deviceId for which the methods apply.
-     *
-     * @return The deviceId as contained in the handler data
-     */
-    private DeviceId did() {
-        return handler().data().deviceId();
-    }
-
-    /**
-     * Execute RPC request.
-     *
-     * @param session Netconf session
-     * @param message Netconf message in XML format
-     * @return XMLConfiguration object
-     */
-
-    private XMLConfiguration executeRpc(NetconfSession session, String message) {
-        try {
-            if (log.isDebugEnabled()) {
-                try {
-                    StringWriter stringWriter = new StringWriter();
-                    XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(message);
-                    xconf.setExpressionEngine(new XPathExpressionEngine());
-                    xconf.save(stringWriter);
-                    log.debug("Request {}", stringWriter.toString());
-                } catch (ConfigurationException e) {
-                    log.error("XML Config Exception ", e);
-                }
-            }
-            CompletableFuture<String> fut = session.rpc(message);
-            String rpcReply = fut.get();
-            XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(rpcReply);
-            xconf.setExpressionEngine(new XPathExpressionEngine());
-            if (log.isDebugEnabled()) {
-                try {
-                    StringWriter stringWriter = new StringWriter();
-                    xconf.save(stringWriter);
-                    log.debug("Response {}", stringWriter.toString());
-                } catch (ConfigurationException e) {
-                    log.error("XML Config Exception ", e);
-                }
-            }
-            return xconf;
-        } catch (NetconfException ne) {
-            log.error("Exception on Netconf protocol: {}.", ne);
-        } catch (InterruptedException ie) {
-            log.error("Interrupted Exception: {}.", ie);
-        } catch (ExecutionException ee) {
-            log.error("Concurrent Exception while executing Netconf operation: {}.", ee);
-        }
-        return null;
-    }
-
-    /**
-     * Get the target-output-power value on specific optical-channel.
-     *
-     * @param port      the port
-     * @param component the port component. It should be 'oc-name' in the Annotations of Port.
-     *                  'oc-name' could be mapped to '/component/name' in openconfig yang.
-     * @return target power value
+     * Getting target value of output power.
+     * @param port port
+     * @param component the component
+     * @return target output power range
      */
     @Override
-    public Optional<Double> getTargetPower(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPower(port, component);
+    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
+        double targetMin = -30;
+        double targetMax = 1;
+        return Optional.of(Range.open(targetMin, targetMax));
     }
 
     @Override
-    public void setTargetPower(PortNumber port, T component, double power) {
-        checkState(component);
-        state.setTargetPower(port, component, power);
+    public Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
+        double targetMin = -30;
+        double targetMax = 1;
+        return Optional.of(Range.open(targetMin, targetMax));
     }
 
-    @Override
-    public Optional<Double> currentPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentPower(port, component);
-    }
-
-    @Override
-    public Optional<Double> currentInputPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentInputPower(port, component);
-    }
-
-    @Override
-    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPowerRange(port, component);
-    }
-
-    @Override
-    public Optional<Range<Double>> getInputPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getInputPowerRange(port, component);
-    }
-
-    @Override
-    public List<PortNumber> getPorts(T component) {
-        checkState(component);
-        return state.getPorts(component);
-    }
-
-
-    /**
-     * Set the ComponentType to invoke proper methods for different template T.
-     *
-     * @param component the component.
-     */
-    void checkState(Object component) {
-        String clsName = component.getClass().getName();
-        switch (clsName) {
-            case "org.onosproject.net.Direction":
-                state = ComponentType.DIRECTION;
-                break;
-            case "org.onosproject.net.OchSignal":
-                state = ComponentType.OCHSIGNAL;
-                break;
-            default:
-                log.error("Cannot parse the component type {}.", clsName);
-                log.info("The component content is {}.", component.toString());
-        }
-        state.cassini = this;
-    }
-
-    /**
-     * Component type.
-     */
-    enum ComponentType {
-
-        /**
-         * Direction.
-         */
-        DIRECTION() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        },
-
-        /**
-         * OchSignal.
-         */
-        OCHSIGNAL() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        };
-
-
-        CassiniTerminalDevicePowerConfig cassini;
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component component
-         * @return target power
-         */
-        Optional<Double> getTargetPower(PortNumber port, Object component) {
-            NetconfSession session = cassini.getNetconfSession(cassini.did());
-            checkNotNull(session);
-            String filter = parsePort(cassini, port, null, null);
-            StringBuilder rpcReq = new StringBuilder();
-            rpcReq.append(RPC_TAG_NETCONF_BASE)
-                    .append("<get-config>")
-                    .append("<source>")
-                    .append("<" + DatastoreId.RUNNING + "/>")
-                    .append("</source>")
-                    .append("<filter type='subtree'>")
-                    .append(filter)
-                    .append("</filter>")
-                    .append("</get-config>")
-                    .append(RPC_CLOSE_TAG);
-            XMLConfiguration xconf = cassini.executeRpc(session, rpcReq.toString());
-            if (xconf == null) {
-                log.error("Error in executingRpc");
-                return Optional.empty();
-            }
-            try {
-                HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/config");
-                if (config == null || config.getString("target-output-power") == null) {
-                    return Optional.empty();
-                }
-                double power = Float.valueOf(config.getString("target-output-power")).doubleValue();
-                return Optional.of(power);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component component
-         * @param power     target value
-         */
-        void setTargetPower(PortNumber port, Object component, double power) {
-            NetconfSession session = cassini.getNetconfSession(cassini.did());
-            checkNotNull(session);
-            String editConfig = parsePort(cassini, port, null, power);
-            StringBuilder rpcReq = new StringBuilder();
-            rpcReq.append(RPC_TAG_NETCONF_BASE)
-                    .append("<edit-config>")
-                    .append("<target><" + DatastoreId.CANDIDATE + "/></target>")
-                    .append("<config>")
-                    .append(editConfig)
-                    .append("</config>")
-                    .append("</edit-config>")
-                    .append(RPC_CLOSE_TAG);
-            log.info("Setting power {}", rpcReq.toString());
-            XMLConfiguration xconf = cassini.executeRpc(session, rpcReq.toString());
-            // The successful reply should be "<rpc-reply ...><ok /></rpc-reply>"
-            if (!xconf.getRoot().getChild(0).getName().equals("ok")) {
-                log.error("The <edit-config> operation to set target-output-power of Port({}:{}) is failed.",
-                        port.toString(), component.toString());
-            }
-            try {
-                session.commit();
-            } catch (NetconfException e) {
-                log.error("error committing channel power", e);
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component the component.
-         * @return current output power.
-         */
-        Optional<Double> currentPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    cassini, port, "<output-power><instant/></output-power>");
-            try {
-                HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/state/output-power");
-                if (config == null || config.getString("instant") == null) {
-                    return Optional.empty();
-                }
-                double currentPower = Float.valueOf(config.getString("instant")).doubleValue();
-                return Optional.of(currentPower);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         *
-         * @param port      port
-         * @param component the component
-         * @return current input power
-         */
-        Optional<Double> currentInputPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    cassini, port, "<input-power><instant/></input-power>");
-            try {
-                HierarchicalConfiguration config =
-                        xconf.configurationAt("data/components/component/optical-channel/state/input-power");
-                if (config == null || config.getString("instant") == null) {
-                    return Optional.empty();
-                }
-                double currentPower = Float.valueOf(config.getString("instant")).doubleValue();
-                return Optional.of(currentPower);
-            } catch (IllegalArgumentException e) {
-                return Optional.empty();
-            }
-        }
-
-        Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
-            double targetMin = -30;
-            double targetMax = 1;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
-            double targetMin = -30;
-            double targetMax = 1;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        List<PortNumber> getPorts(Object component) {
-            // FIXME
-            log.warn("Not Implemented Yet!");
-            return new ArrayList<PortNumber>();
-        }
-
-        /**
-         * Get filtered content under <optical-channel><state>.
-         *
-         * @param pc         power config instance
-         * @param port       the port number
-         * @param underState the filter condition
-         * @return RPC reply
-         */
-        private static XMLConfiguration getOpticalChannelState(CassiniTerminalDevicePowerConfig pc,
-                                                               PortNumber port, String underState) {
-            NetconfSession session = pc.getNetconfSession(pc.did());
-            checkNotNull(session);
-            String name = ocName(pc, port);
-            StringBuilder rpcReq = new StringBuilder(RPC_TAG_NETCONF_BASE);
-            rpcReq.append("<get><filter><components xmlns=\"http://openconfig.net/yang/platform\"><component>")
-                    .append("<name>").append(name).append("</name>")
-                    .append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
-                    .append("<state>")
-                    .append(underState)
-                    .append("</state></optical-channel></component></components></filter></get>")
-                    .append(RPC_CLOSE_TAG);
-            XMLConfiguration xconf = pc.executeRpc(session, rpcReq.toString());
-            return xconf;
-        }
-
-
-        /**
-         * Extract component name from portNumber's annotations.
-         *
-         * @param pc         power config instance
-         * @param portNumber the port number
-         * @return the component name
-         */
-        private static String ocName(CassiniTerminalDevicePowerConfig pc, PortNumber portNumber) {
-            DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
-            DeviceId deviceId = pc.handler().data().deviceId();
-            return deviceService.getPort(deviceId, portNumber).annotations().value("oc-name");
-        }
-
-
-        /**
-         * Parse filtering string from port and component.
-         *
-         * @param portNumber Port Number
-         * @param component  port component (optical-channel)
-         * @param power      power value set.
-         * @return filtering string in xml format
-         */
-        private static String parsePort(CassiniTerminalDevicePowerConfig pc, PortNumber portNumber,
-                                        Object component, Double power) {
-            if (component == null) {
-                String name = ocName(pc, portNumber);
-                StringBuilder sb = new StringBuilder("<components xmlns=\"http://openconfig.net/yang/platform\">");
-                sb.append("<component>").append("<name>").append(name).append("</name>");
-                if (power != null) {
-                    // This is an edit-config operation.
-                    sb.append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
-                            .append("<config>")
-                            .append("<target-output-power>")
-                            .append(power)
-                            .append("</target-output-power>")
-                            .append("</config>")
-                            .append("</optical-channel>");
-                }
-                sb.append("</component>").append("</components>");
-                return sb.toString();
-            } else {
-                log.error("Cannot process the component {}.", component.getClass());
-                return null;
-            }
-        }
-    }
-}
+}
\ No newline at end of file
diff --git a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/NokiaTerminalDevicePowerConfig.java b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/NokiaTerminalDevicePowerConfig.java
index 9893fdb..a237e81 100644
--- a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/NokiaTerminalDevicePowerConfig.java
+++ b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/NokiaTerminalDevicePowerConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-present Open Networking Foundation
+ * Copyright 2019-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.
@@ -19,25 +19,20 @@
 package org.onosproject.drivers.odtn;
 
 import com.google.common.collect.Range;
-import org.apache.commons.configuration.XMLConfiguration;
-import org.onlab.osgi.DefaultServiceDirectory;
-import org.onosproject.drivers.utilities.XmlConfigParser;
+import org.onosproject.drivers.odtn.openconfig.TerminalDevicePowerConfig;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.PortNumber;
-import org.onosproject.net.behaviour.PowerConfig;
-import org.onosproject.net.device.DeviceService;
-import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.netconf.DatastoreId;
 import org.onosproject.netconf.NetconfController;
 import org.onosproject.netconf.NetconfDevice;
 import org.onosproject.netconf.NetconfException;
 import org.onosproject.netconf.NetconfSession;
 import org.slf4j.Logger;
 
-import java.util.ArrayList;
-import java.util.List;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Optional;
 
-import static com.google.common.base.Preconditions.checkNotNull;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
@@ -47,24 +42,16 @@
  *
  */
 public class NokiaTerminalDevicePowerConfig<T>
-        extends AbstractHandlerBehaviour implements PowerConfig<T> {
-
-    private static final String RPC_TAG_NETCONF_BASE =
-            "<rpc xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">";
-
-    private static final String RPC_CLOSE_TAG = "</rpc>";
+        extends TerminalDevicePowerConfig<T> {
 
     private static final String OPTICAL_CHANNEL = "OCH";
 
     private static final Logger log = getLogger(NokiaTerminalDevicePowerConfig.class);
 
-    private ComponentType state = ComponentType.DIRECTION;
-
     //The username and password are different from the username and password in the netconf-cfg file
     private static final String USER_NAME = "admin";
     private static final String PASSWORD = "admin";
 
-
     /**
      * Login to the device by providing the correct user and password in order to configure the device
      * Returns the NetconfSession with the device for which the method was called.
@@ -74,7 +61,10 @@
      * @param passwd password to access the device
      * @return The netconf session or null
      */
-    private NetconfSession getNetconfSessionAndLogin(DeviceId deviceId, String userName, String passwd) {
+    @Override
+    public NetconfSession getNetconfSession(DeviceId deviceId, String userName, String passwd) {
+        userName = USER_NAME;
+        passwd = PASSWORD;
         NetconfController nc = handler().get(NetconfController.class);
         NetconfDevice ndev = nc.getDevicesMap().get(deviceId);
         if (ndev == null) {
@@ -136,391 +126,133 @@
     }
 
     /**
-     * Get the deviceId for which the methods apply.
      *
-     * @return The deviceId as contained in the handler data
+     * @param param the config parameter.
+     * @return array of string
      */
-    private DeviceId did() {
-        return handler().data().deviceId();
+    @Override
+    public Map<String, String> buildRpcString(String param) {
+        Map<String, String> rpcMap = new HashMap<String, String>();
+        switch (param) {
+            case TARGET_POWER:
+                rpcMap.put("TARGET_OUTPUT_PATH", "components/component/oc-opt-term:optical-channel/oc-opt-term:config");
+                rpcMap.put("TARGET_OUTPUT_LEAF", "oc-opt-term:target-output-power");
+            case CURRENT_POWER:
+                rpcMap.put("CURRENT_POWER_PATH", "components.component." +
+                                                            "oc-opt-term:optical-channel." +
+                                                            "oc-opt-term:state." +
+                                                            "oc-opt-term:output-power");
+                rpcMap.put("CURRENT_POWER_ROUTE", "<oc-opt-term:output-power>" +
+                                                            "<oc-opt-term:instant/>" +
+                                                            "</oc-opt-term:output-power>");
+                rpcMap.put("CURRENT_POWER_LEAF", "oc-opt-term:instant");
+            default:
+                rpcMap.put("CURRENT_INPUT_POWER_PATH", "components.component." +
+                                                                "oc-opt-term:optical-channel." +
+                                                                "oc-opt-term:state." +
+                                                                "oc-opt-term:input-power");
+                rpcMap.put("CURRENT_INPUT_POWER_ROUTE", "<oc-opt-term:input-power>" +
+                                                                "<oc-opt-term:instant/>" +
+                                                                "</oc-opt-term:input-power>");
+                rpcMap.put("CURRENT_INPUT_POWER_LEAF", "oc-opt-term:instant");
+        }
+            return rpcMap;
     }
 
     /**
-     * Execute RPC request.
-     * @param session Netconf session
-     * @param message Netconf message in XML format
-     * @return XMLConfiguration object
+     * Construct a rpc target power message.
+     *
+     * @param filter to build rpc
+     * @return RPC payload
      */
+    @Override
+    public StringBuilder getTargetPowerRequestRpc(String filter) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<get>")
+                .append("<filter type='subtree'>")
+                .append(filter)
+                .append("</filter>")
+                .append("</get>");
+        return rpc;
+    }
 
-    //TODO: rewrite with requestSync operation..
-    private XMLConfiguration executeRpcReq(NetconfSession session, String message) {
-        try {
-            String reply = session.requestSync(message);
-            String data = getDataOfRpcReply(reply);
-            log.debug("\n\n [executeRpcReq] RPC request returned this: \n {} \n\n", data);
-            XMLConfiguration cfg = (XMLConfiguration) XmlConfigParser.loadXmlString(getDataOfRpcReply(reply));
-            return cfg;
-        } catch (NetconfException ne) {
-            log.error("Exception on NetConf protocol: {}.", ne);
-        } catch (Exception e) {
-            log.debug("Error loading data to internal XML Configuration format: \n {}", e);
+    /**
+     * Construct a rpc target power message.
+     *
+     * @return RPC payload
+     */
+    @Override
+    public DatastoreId getDataStoreId() {
+        return DatastoreId.RUNNING;
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @param name
+     * @param underState to build rpc for setting configuration
+     * @return RPC payload
+     */
+    @Override
+    public StringBuilder getOpticalChannelStateRequestRpc(String name, String underState) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<name>").append(name).append("</name>")
+                .append("<oc-opt-term:optical-channel " +
+                                "xmlns:oc-opt-term=\"http://openconfig.net/yang/terminal-device\">")
+                .append("<oc-opt-term:state>")
+                .append(underState)
+                .append("</oc-opt-term:state>")
+                .append("</oc-opt-term:optical-channel>")
+                .append("</component></components></filter></get>");
+        return rpc;
+    }
+
+    /**
+     * Getting target value of output power.
+     * @param port port
+     * @param component the component
+     * @return target output power range
+     */
+    @Override
+    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
+        double targetMin = -20;
+        double targetMax = 5;
+        return Optional.of(Range.open(targetMin, targetMax));
+    }
+
+    @Override
+    public Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
+        double targetMin = -20;
+        double targetMax = 5;
+        return Optional.of(Range.open(targetMin, targetMax));
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @param name for optical channel name
+     * @param power to build rpc for setting configuration
+     * @return RPC payload
+     */
+    @Override
+    public StringBuilder parsePortRequestRpc(Double power, String name) {
+        if (name != null) {
+            StringBuilder rpc = new StringBuilder();
+            rpc.append("<component>").append("<name>").append(name).append("</name>");
+            if (power != null) {
+                // This is an edit-config operation.
+                rpc.append("<oc-opt-term:optical-channel " +
+                                  "xmlns:oc-opt-term=\"http://openconfig.net/yang/terminal-device\">")
+                        .append("<oc-opt-term:config>")
+                        .append("<oc-opt-term:target-output-power>")
+                        .append(power)
+                        .append("</oc-opt-term:target-output-power>")
+                        .append("</oc-opt-term:config>")
+                        .append("</oc-opt-term:optical-channel>");
+            }
+            return rpc;
         }
         return null;
     }
 
-    /**
-     * Get the target-output-power value on specific optical-channel.
-     * @param port the port
-     * @param component the port component. It should be 'oc-name' in the Annotations of Port.
-     *                  'oc-name' could be mapped to '/component/name' in openconfig yang.
-     * @return target power value
-     */
-    @Override
-    public Optional<Double> getTargetPower(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPower(port, component);
-    }
-
-    @Override
-    public void setTargetPower(PortNumber port, T component, double power) {
-        checkState(component);
-        state.setTargetPower(port, component, power);
-    }
-
-    @Override
-    public Optional<Double> currentPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentPower(port, component);
-    }
-
-    @Override
-    public Optional<Double> currentInputPower(PortNumber port, T component) {
-        checkState(component);
-        return state.currentInputPower(port, component);
-    }
-
-    @Override
-    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getTargetPowerRange(port, component);
-    }
-
-    @Override
-    public Optional<Range<Double>> getInputPowerRange(PortNumber port, T component) {
-        checkState(component);
-        return state.getInputPowerRange(port, component);
-    }
-
-    @Override
-    public List<PortNumber> getPorts(T component) {
-        checkState(component);
-        return state.getPorts(component);
-    }
-
-
-    /**
-     * Set the ComponentType to invoke proper methods for different template T.
-     * @param component the component.
-     */
-    void checkState(Object component) {
-        String clsName = component.getClass().getName();
-        switch (clsName) {
-            case "org.onosproject.net.Direction":
-                state = ComponentType.DIRECTION;
-                break;
-            case "org.onosproject.net.OchSignal":
-                state = ComponentType.OCHSIGNAL;
-                break;
-            default:
-                log.error("Cannot parse the component type {}.", clsName);
-                log.info("The component content is {}.", component.toString());
-        }
-        state.nokia = this;
-    }
-
-    /**
-     * Component type.
-     */
-    enum ComponentType {
-
-        /**
-         * Direction.
-         */
-        DIRECTION() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        },
-
-        /**
-         * OchSignal.
-         */
-        OCHSIGNAL() {
-            @Override
-            public Optional<Double> getTargetPower(PortNumber port, Object component) {
-                return super.getTargetPower(port, component);
-            }
-
-            @Override
-            public void setTargetPower(PortNumber port, Object component, double power) {
-                super.setTargetPower(port, component, power);
-            }
-        };
-
-
-
-        NokiaTerminalDevicePowerConfig nokia;
-
-        /**
-         * mirror method in the internal class.
-         * @param port port
-         * @param component component
-         * @return target power
-         */
-        //TODO: Overlap with getTargetPowerRange function..
-        Optional<Double> getTargetPower(PortNumber port, Object component) {
-            NetconfSession session = nokia.getNetconfSessionAndLogin(nokia.did(), USER_NAME, PASSWORD);
-            checkNotNull(session);
-            String filter = parsePort(nokia, port, null, null);
-            if (filter != null) {
-                StringBuilder rpcReq = new StringBuilder();
-                rpcReq.append(RPC_TAG_NETCONF_BASE)
-                        .append("<get>")
-                        .append("<filter type='subtree'>")
-                        .append(filter)
-                        .append("</filter>")
-                        .append("</get>")
-                        .append(RPC_CLOSE_TAG);
-                XMLConfiguration xconf = nokia.executeRpcReq(session, rpcReq.toString());
-                log.debug("\n\n [getTargetPower] Obtained information " +
-                                  "from getTargetPower function is.. \n {} \n\n", xconf);
-                try {
-                    String tpower = xconf.getString("components.component." +
-                                                            "oc-opt-term:optical-channel." +
-                                                            "oc-opt-term:config." +
-                                                            "oc-opt-term:target-output-power");
-                    double power = Float.valueOf(tpower).doubleValue();
-                    log.debug("\n\n [getTargetPower] Target OUTPUT power is.. {} \n\n", power);
-                    return Optional.of(power);
-                } catch (IllegalArgumentException e) {
-                    log.debug("\n\n [getTargetPower] Something went wrong " +
-                                      "during the parsing of configuration in getTargetPower function.. \n\n");
-                    return Optional.empty();
-                }
-            } else {
-                log.debug("Port you're trying to get ({}) is not optical", port.toString());
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         * @param port port
-         * @param component component
-         * @param power target value
-         */
-        void setTargetPower(PortNumber port, Object component, double power) {
-            NetconfSession session = nokia.getNetconfSessionAndLogin(nokia.did(), USER_NAME, PASSWORD);
-            checkNotNull(session);
-            String editConfig = parsePort(nokia, port, null, power);
-            if (editConfig != null) {
-                StringBuilder rpcReq = new StringBuilder();
-                rpcReq.append(RPC_TAG_NETCONF_BASE)
-                        .append("<edit-config>")
-                        .append("<target><running/></target>")
-                        .append("<config xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">")
-                        .append(editConfig)
-                        .append("</config>")
-                        .append("</edit-config>")
-                        .append(RPC_CLOSE_TAG);
-                XMLConfiguration xconf = nokia.executeRpcReq(session, rpcReq.toString());
-                log.debug("\n\n [setTargetPower] Obtained information is.. \n {} \n\n", xconf);
-                // The successful reply should be "<rpc-reply ...><ok /></rpc-reply>"
-                if (!xconf.getRoot().getChild(0).getName().equals("ok")) {
-                    log.error("[setTargetPower] The <edit-config> operation " +
-                                      "to set target-output-power of Port({}:{}) is failed.",
-                              port.toString(), component.toString());
-                } else {
-                    log.debug("[setTargetPower] Answer on <edit-config> request " +
-                                      "is following: \n {}\n", xconf.toString());
-                }
-            } else {
-                log.debug("[setTargetPower] Port you're trying " +
-                                  "to set ({}) is not optical", port.toString());
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         * @param port port
-         * @param component the component.
-         * @return current output power.
-         */
-        Optional<Double> currentPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    nokia, port, "<oc-opt-term:output-power>" +
-                            "<oc-opt-term:instant/>" +
-                            "</oc-opt-term:output-power>");
-            try {
-                String oipower = xconf.getString("components.component." +
-                                                         "oc-opt-term:optical-channel." +
-                                                         "oc-opt-term:state." +
-                                                         "oc-opt-term:output-power." +
-                                                         "oc-opt-term:instant");
-                log.debug("\n\n [currentPower] That's what we read: \n {} \n\n", oipower);
-                double currentPower = Float.valueOf(oipower).doubleValue();
-                return Optional.of(currentPower);
-            } catch (Exception e) {
-                log.debug("\n\n [currentPower] Something went wrong " +
-                                  "during the parsing of obtained answer.. \n\n");
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * mirror method in the internal class.
-         * @param port port
-         * @param component the component
-         * @return current input power
-         */
-        Optional<Double> currentInputPower(PortNumber port, Object component) {
-            XMLConfiguration xconf = getOpticalChannelState(
-                    nokia, port, "<oc-opt-term:input-power>" +
-                            "<oc-opt-term:instant/>" +
-                            "</oc-opt-term:input-power>");
-            try {
-                String iipower = xconf.getString("components.component." +
-                                                         "oc-opt-term:optical-channel." +
-                                                         "oc-opt-term:state." +
-                                                         "oc-opt-term:input-power." +
-                                                         "oc-opt-term:instant");
-                log.debug("\n\n [currentInputPower] That's what we read: \n {} \n\n", iipower);
-                double currentPower = Float.valueOf(iipower).doubleValue();
-
-                return Optional.of(currentPower);
-            } catch (Exception e) {
-                log.debug("\n\n [currentInputPower] Something went wrong " +
-                                  "during the parsing of obtained answer.. \n\n");
-                return Optional.empty();
-            }
-        }
-
-        /**
-         * Getting target value of output power.
-         * @param port port
-         * @param component the component
-         * @return target output power range
-         */
-
-        Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
-            double targetMin = -20;
-            double targetMax = 5;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
-            double targetMin = -20;
-            double targetMax = 5;
-            return Optional.of(Range.open(targetMin, targetMax));
-        }
-
-        List<PortNumber> getPorts(Object component) {
-            // FIXME
-            log.warn("[getPorts] Not Implemented Yet!");
-            return new ArrayList<PortNumber>();
-        }
-
-        /**
-         * Get filtered content under <optical-channel><state>.
-         * @param pc power config instance
-         * @param port the port number
-         * @param underState the filter condition
-         * @return RPC reply
-         */
-        private static XMLConfiguration getOpticalChannelState(NokiaTerminalDevicePowerConfig pc,
-                                                               PortNumber port, String underState) {
-            NetconfSession session = pc.getNetconfSessionAndLogin(pc.did(), USER_NAME, PASSWORD);
-            checkNotNull(session);
-            String name = ocName(pc, port);
-            StringBuilder rpcReq = new StringBuilder(RPC_TAG_NETCONF_BASE);
-            rpcReq.append("<get><filter><components xmlns=\"http://openconfig.net/yang/platform\"><component>")
-                    .append("<name>").append(name).append("</name>")
-                    .append("<oc-opt-term:optical-channel " +
-                                    "xmlns:oc-opt-term=\"http://openconfig.net/yang/terminal-device\">")
-                    .append("<oc-opt-term:state>")
-                    .append(underState)
-                    .append("</oc-opt-term:state>")
-                    .append("</oc-opt-term:optical-channel>")
-                    .append("</component></components></filter></get>")
-                    .append(RPC_CLOSE_TAG);
-            XMLConfiguration xconf = pc.executeRpcReq(session, rpcReq.toString());
-            return xconf;
-        }
-
-        /**
-         * Extract component name from portNumber's annotations.
-         * @param pc power config instance
-         * @param portNumber the port number
-         * @return the component name
-         */
-        private static String ocName(NokiaTerminalDevicePowerConfig pc, PortNumber portNumber) {
-            DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
-            DeviceId deviceId = pc.handler().data().deviceId();
-            String port = deviceService.getPort(deviceId, portNumber).annotations().value("oc-name");
-
-            // Applying some magic to return the correct port with the correct name
-            String portType = deviceService.getPort(deviceId, portNumber).type().toString();
-            log.debug("\n\n [ocName] Type of the port taken from ONOS storage " +
-                              "has following properties.. \n {} \n", portType);
-            if (portType.equals(OPTICAL_CHANNEL)) {
-                String[] textStr = port.split("-");
-                String och = "OCH-" + textStr[1] + "-" + textStr[2] + "-" + textStr[3];
-                log.debug("\n\n [ocName] Optical channel returned is.. {} \n\n", och);
-                return och;
-            } else {
-                log.debug("[ocName] This port is not an optical one");
-                return null;
-            }
-        }
-
-        /**
-         * Parse filtering string from port and component.
-         * @param portNumber Port Number
-         * @param component port component (optical-channel)
-         * @param power power value set.
-         * @return filtering string in xml format
-         */
-        private static String parsePort(NokiaTerminalDevicePowerConfig pc, PortNumber portNumber,
-                                        Object component, Double power) {
-            if (component == null) {
-                String name = ocName(pc, portNumber);
-                if (name != null) {
-                    StringBuilder sb = new StringBuilder("<components " +
-                                                                 "xmlns=\"http://openconfig.net/yang/platform\">");
-                    sb.append("<component>").append("<name>").append(name).append("</name>");
-                    if (power != null) {
-                        // This is an edit-config operation.
-                        sb.append("<oc-opt-term:optical-channel " +
-                                          "xmlns:oc-opt-term=\"http://openconfig.net/yang/terminal-device\">")
-                                .append("<oc-opt-term:config>")
-                                .append("<oc-opt-term:target-output-power>")
-                                .append(power)
-                                .append("</oc-opt-term:target-output-power>")
-                                .append("</oc-opt-term:config>")
-                                .append("</oc-opt-term:optical-channel>");
-                    }
-                    sb.append("</component>").append("</components>");
-                    return sb.toString();
-                }
-            } else {
-                log.error("[parsePort] Cannot process the component {}.", component.getClass());
-                return null;
-            }
-            return null;
-        }
-    }
 }
diff --git a/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/openconfig/TerminalDevicePowerConfig.java b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/openconfig/TerminalDevicePowerConfig.java
new file mode 100644
index 0000000..5715a4b
--- /dev/null
+++ b/drivers/odtn-driver/src/main/java/org/onosproject/drivers/odtn/openconfig/TerminalDevicePowerConfig.java
@@ -0,0 +1,559 @@
+/*
+ * Copyright 2019-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.
+ *
+ * This work was partially supported by EC H2020 project METRO-HAUL (761727).
+ */
+
+package org.onosproject.drivers.odtn.openconfig;
+
+import com.google.common.collect.Range;
+import org.apache.commons.configuration.ConfigurationException;
+import org.apache.commons.configuration.HierarchicalConfiguration;
+import org.apache.commons.configuration.XMLConfiguration;
+import org.apache.commons.configuration.tree.xpath.XPathExpressionEngine;
+import org.onlab.osgi.DefaultServiceDirectory;
+import org.onosproject.drivers.utilities.XmlConfigParser;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.PowerConfig;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.netconf.DatastoreId;
+import org.onosproject.netconf.NetconfController;
+import org.onosproject.netconf.NetconfDevice;
+import org.onosproject.netconf.NetconfException;
+import org.onosproject.netconf.NetconfSession;
+import org.slf4j.Logger;
+
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
+
+public class TerminalDevicePowerConfig<T> extends AbstractHandlerBehaviour implements PowerConfig<T> {
+
+    public static final String RPC_TAG_NETCONF_BASE =
+            "<rpc xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\">";
+
+    public static final String RPC_CLOSE_TAG = "</rpc>";
+
+    public static final String TARGET_POWER = "TargetPower";
+
+    public static final String CURRENT_POWER = "CurrentPower";
+
+    public static final String CURRENT_INPUT_POWER = "CurrentInputPower";
+
+    public static final Logger log = getLogger(TerminalDevicePowerConfig.class);
+
+    public ComponentType state = ComponentType.DIRECTION;
+
+    /**
+     * Returns the NetconfSession with the device for which the method was called.
+     *
+     * @param deviceId device indetifier
+     * @param userName username to access the device
+     * @param passwd password to access the device
+     * @return The netconf session or null
+     */
+    public NetconfSession getNetconfSession(DeviceId deviceId, String userName, String passwd) {
+        NetconfController controller = handler().get(NetconfController.class);
+        NetconfDevice ncdev = controller.getDevicesMap().get(deviceId);
+        if (ncdev == null) {
+            log.trace("No netconf device, returning null session");
+            return null;
+        }
+        return ncdev.getSession();
+    }
+
+    /**
+     * Get the deviceId for which the methods apply.
+     *
+     * @return The deviceId as contained in the handler data
+     */
+    public DeviceId did() {
+        return handler().data().deviceId();
+    }
+
+    /**
+     * Execute RPC request.
+     *
+     * @param session Netconf session
+     * @param message Netconf message in XML format
+     * @return XMLConfiguration object
+     */
+
+    public XMLConfiguration executeRpc(NetconfSession session, String message) {
+        try {
+            if (log.isDebugEnabled()) {
+                try {
+                    StringWriter stringWriter = new StringWriter();
+                    XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(message);
+                    xconf.setExpressionEngine(new XPathExpressionEngine());
+                    xconf.save(stringWriter);
+                    log.debug("Request {}", stringWriter.toString());
+                } catch (ConfigurationException e) {
+                    log.error("XML Config Exception ", e);
+                }
+            }
+            CompletableFuture<String> fut = session.rpc(message);
+            String rpcReply = fut.get();
+            XMLConfiguration xconf = (XMLConfiguration) XmlConfigParser.loadXmlString(rpcReply);
+            xconf.setExpressionEngine(new XPathExpressionEngine());
+            if (log.isDebugEnabled()) {
+                try {
+                    StringWriter stringWriter = new StringWriter();
+                    xconf.save(stringWriter);
+                    log.debug("Response {}", stringWriter.toString());
+                } catch (ConfigurationException e) {
+                    log.error("XML Config Exception ", e);
+                }
+            }
+            return xconf;
+        } catch (NetconfException ne) {
+            log.error("Exception on Netconf protocol: {}.", ne);
+        } catch (InterruptedException ie) {
+            log.error("Interrupted Exception: {}.", ie);
+        } catch (ExecutionException ee) {
+            log.error("Concurrent Exception while executing Netconf operation: {}.", ee);
+        }
+        return null;
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @param filter to build rpc
+     * @return RPC payload
+     */
+    public StringBuilder getTargetPowerRequestRpc(String filter) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<get-config>")
+                .append("<source>")
+                .append("<" + DatastoreId.RUNNING + "/>")
+                .append("</source>")
+                .append("<filter type='subtree'>")
+                .append(filter)
+                .append("</filter>")
+                .append("</get-config>");
+        return rpc;
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @return RPC payload
+     */
+    public DatastoreId getDataStoreId() {
+        return DatastoreId.CANDIDATE;
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @param name for optical channel name
+     * @param underState to build rpc for setting configuration
+     * @return RPC payload
+     */
+    public StringBuilder getOpticalChannelStateRequestRpc(String name, String underState) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<name>").append(name).append("</name>")
+                .append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
+                .append("<state>")
+                .append(underState)
+                .append("</state></optical-channel></component></components></filter></get>");
+        return rpc;
+    }
+
+    /**
+     * Construct a rpc target power message.
+     *
+     * @param name for optical channel name
+     * @param power to build rpc for setting configuration
+     * @return RPC payload
+     */
+    public StringBuilder parsePortRequestRpc(Double power, String name) {
+        StringBuilder rpc = new StringBuilder();
+        rpc.append("<component>").append("<name>").append(name).append("</name>").
+                append("<optical-channel xmlns=\"http://openconfig.net/yang/terminal-device\">")
+                .append("<config>")
+                .append("<target-output-power>")
+                .append(power)
+                .append("</target-output-power>")
+                .append("</config>")
+                .append("</optical-channel>");
+        return rpc;
+    }
+    /**
+     * Get the target-output-power value on specific optical-channel.
+     *
+     * @param port      the port
+     * @param component the port component. It should be 'oc-name' in the Annotations of Port.
+     *                  'oc-name' could be mapped to '/component/name' in openconfig yang.
+     * @return target power value
+     */
+    @Override
+    public Optional<Double> getTargetPower(PortNumber port, T component) {
+        checkState(component);
+        return state.getTargetPower(port, component);
+    }
+
+    @Override
+    public void setTargetPower(PortNumber port, T component, double power) {
+        checkState(component);
+        state.setTargetPower(port, component, power);
+    }
+
+    @Override
+    public Optional<Double> currentPower(PortNumber port, T component) {
+        checkState(component);
+        return state.currentPower(port, component);
+    }
+
+    @Override
+    public Optional<Double> currentInputPower(PortNumber port, T component) {
+        checkState(component);
+        return state.currentInputPower(port, component);
+    }
+
+    @Override
+    public Optional<Range<Double>> getTargetPowerRange(PortNumber port, T component) {
+        checkState(component);
+        return state.getTargetPowerRange(port, component);
+    }
+
+    @Override
+    public Optional<Range<Double>> getInputPowerRange(PortNumber port, T component) {
+        checkState(component);
+        return state.getInputPowerRange(port, component);
+    }
+
+    @Override
+    public List<PortNumber> getPorts(T component) {
+        checkState(component);
+        return state.getPorts(component);
+    }
+
+
+    /**
+     * Set the ComponentType to invoke proper methods for different template T.
+     *
+     * @param component the component.
+     */
+    public void checkState(Object component) {
+        String clsName = component.getClass().getName();
+        switch (clsName) {
+            case "org.onosproject.net.Direction":
+                state = TerminalDevicePowerConfig.ComponentType.DIRECTION;
+                break;
+            case "org.onosproject.net.OchSignal":
+                state = TerminalDevicePowerConfig.ComponentType.OCHSIGNAL;
+                break;
+            default:
+                log.error("Cannot parse the component type {}.", clsName);
+                log.info("The component content is {}.", component.toString());
+        }
+        state.driver = this;
+    }
+    /**
+    *
+    * @param param the config parameter.
+    * @return array of string
+    */
+    public Map<String, String> buildRpcString(String param) {
+        Map<String, String> rpcMap = new HashMap<String, String>();
+        switch (param) {
+            case TARGET_POWER:
+                rpcMap.put("TARGET_OUTPUT_PATH", "data/components/component/optical-channel/config");
+                rpcMap.put("TARGET_OUTPUT_LEAF", "target-output-power");
+            case CURRENT_POWER:
+                rpcMap.put("CURRENT_POWER_PATH", "data/components/component/optical-channel/state/output-power");
+                rpcMap.put("CURRENT_POWER_ROUTE", "<output-power><instant/></output-power>");
+                rpcMap.put("CURRENT_POWER_LEAF", "instant");
+            default:
+                rpcMap.put("CURRENT_INPUT_POWER_PATH", "data/components/component/optical-channel/state/input-power");
+                rpcMap.put("CURRENT_INPUT_POWER_ROUTE", "<input-power><instant/></input-power>");
+                rpcMap.put("CURRENT_INPUT_POWER_LEAF", "instant");
+        }
+        return rpcMap;
+    }
+
+    /**
+     * Component type.
+     */
+    public enum ComponentType {
+
+        /**
+         * Direction.
+         */
+        DIRECTION() {
+            @Override
+            public Optional<Double> getTargetPower(PortNumber port, Object component) {
+                return super.getTargetPower(port, component);
+            }
+
+            @Override
+            public void setTargetPower(PortNumber port, Object component, double power) {
+                super.setTargetPower(port, component, power);
+            }
+        },
+
+        /**
+         * OchSignal.
+         */
+        OCHSIGNAL() {
+            @Override
+            public Optional<Double> getTargetPower(PortNumber port, Object component) {
+                return super.getTargetPower(port, component);
+            }
+
+            @Override
+            public void setTargetPower(PortNumber port, Object component, double power) {
+                super.setTargetPower(port, component, power);
+            }
+        };
+
+
+        public TerminalDevicePowerConfig driver;
+
+        /**
+         * mirror method in the internal class.
+         *
+         * @param port      port
+         * @param component component
+         * @return target power
+         */
+        public Optional<Double> getTargetPower(PortNumber port, Object component) {
+            NetconfSession session = driver.getNetconfSession(driver.did(), "", "");
+            checkNotNull(session);
+            String filter = parsePort(driver, port, null, null);
+            StringBuilder rpcReq = new StringBuilder();
+            rpcReq.append(RPC_TAG_NETCONF_BASE)
+                    .append(driver.getTargetPowerRequestRpc(filter))
+                    .append(RPC_CLOSE_TAG);
+            XMLConfiguration xconf = driver.executeRpc(session, rpcReq.toString());
+            if (xconf == null) {
+                log.error("Error in executingRpc");
+                return Optional.empty();
+            }
+            try {
+                Map<String, String> rpcMap = driver.buildRpcString(TARGET_POWER);
+                String configString = rpcMap.get("TARGET_OUTPUT_PATH"),
+                        paramStr = rpcMap.get("TARGET_OUTPUT_LEAF");
+                HierarchicalConfiguration config =
+                        xconf.configurationAt(configString);
+                if (config == null || config.getString(paramStr) == null) {
+                    return Optional.empty();
+                }
+                double power = Float.valueOf(config.getString(paramStr)).doubleValue();
+                return Optional.of(power);
+            } catch (IllegalArgumentException e) {
+                return Optional.empty();
+            }
+        }
+
+        /**
+         * mirror method in the internal class.
+         *
+         * @param port      port
+         * @param component component
+         * @param power     target value
+         */
+        public void setTargetPower(PortNumber port, Object component, double power) {
+            NetconfSession session = driver.getNetconfSession(driver.did(), "", "");
+            checkNotNull(session);
+            String editConfig = parsePort(driver, port, null, power);
+            StringBuilder rpcReq = new StringBuilder();
+            rpcReq.append(RPC_TAG_NETCONF_BASE)
+                    .append("<edit-config>")
+                    .append("<target><" + driver.getDataStoreId() + "/></target>")
+                    .append("<config>")
+                    .append(editConfig)
+                    .append("</config>")
+                    .append("</edit-config>")
+                    .append(RPC_CLOSE_TAG);
+            log.info("Setting power {}", rpcReq.toString());
+            XMLConfiguration xconf = driver.executeRpc(session, rpcReq.toString());
+            // The successful reply should be "<rpc-reply ...><ok /></rpc-reply>"
+            if (!xconf.getRoot().getChild(0).getName().equals("ok")) {
+                log.error("The <edit-config> operation to set target-output-power of Port({}:{}) is failed.",
+                          port.toString(), component.toString());
+            }
+            try {
+                session.commit();
+            } catch (NetconfException e) {
+                log.error("error committing channel power", e);
+            }
+        }
+
+        /**
+         * mirror method in the internal class.
+         *
+         * @param port      port
+         * @param component the component.
+         * @return current output power.
+         */
+        public Optional<Double> currentPower(PortNumber port, Object component) {
+            Map<String, String> rpcMap = driver.buildRpcString(CURRENT_POWER);
+            String configString = rpcMap.get("CURRENT_POWER_PATH"),
+                    queryStr = rpcMap.get("CURRENT_POWER_ROUTE"),
+                    paramStr = rpcMap.get("CURRENT_POWER_LEAF");
+            XMLConfiguration xconf = getOpticalChannelState(
+                    driver, port, queryStr);
+            try {
+                HierarchicalConfiguration config =
+                        xconf.configurationAt(configString);
+                if (config == null || config.getString(paramStr) == null) {
+                    return Optional.empty();
+                }
+                double currentPower = Float.valueOf(config.getString(paramStr)).doubleValue();
+                return Optional.of(currentPower);
+            } catch (IllegalArgumentException e) {
+                return Optional.empty();
+            }
+        }
+
+        /**
+         * mirror method in the internal class.
+         *
+         * @param port      port
+         * @param component the component
+         * @return current input power
+         */
+        public Optional<Double> currentInputPower(PortNumber port, Object component) {
+            Map<String, String> rpcMap = driver.buildRpcString(CURRENT_INPUT_POWER);
+            String configString = rpcMap.get("CURRENT_INPUT_POWER_PATH"),
+                    queryStr = rpcMap.get("CURRENT_INPUT_POWER_ROUTE"),
+                    paramStr = rpcMap.get("CURRENT_INPUT_POWER_LEAF");
+            XMLConfiguration xconf = getOpticalChannelState(
+                    driver, port, queryStr);
+            try {
+                HierarchicalConfiguration config =
+                        xconf.configurationAt(configString);
+                if (config == null || config.getString(paramStr) == null) {
+                    return Optional.empty();
+                }
+                double currentPower = Float.valueOf(config.getString(paramStr)).doubleValue();
+                return Optional.of(currentPower);
+            } catch (IllegalArgumentException e) {
+                return Optional.empty();
+            }
+        }
+
+        public Optional<Range<Double>> getTargetPowerRange(PortNumber port, Object component) {
+            XMLConfiguration xconf = getOpticalChannelState(
+                    driver, port, "<target-power-range/>");
+            try {
+                HierarchicalConfiguration config =
+                        xconf.configurationAt("data/components/component/optical-channel/state/target-power-range");
+                double targetMin = Float.valueOf(config.getString("min")).doubleValue();
+                double targetMax = Float.valueOf(config.getString("max")).doubleValue();
+                return Optional.of(Range.open(targetMin, targetMax));
+            } catch (IllegalArgumentException e) {
+                return Optional.empty();
+            }
+        }
+
+        public Optional<Range<Double>> getInputPowerRange(PortNumber port, Object component) {
+            XMLConfiguration xconf = getOpticalChannelState(
+                    driver, port, "<input-power-range/>");
+            try {
+                HierarchicalConfiguration config =
+                        xconf.configurationAt("data/components/component/optical-channel/state/input-power-range");
+                double inputMin = Float.valueOf(config.getString("min")).doubleValue();
+                double inputMax = Float.valueOf(config.getString("max")).doubleValue();
+                return Optional.of(Range.open(inputMin, inputMax));
+            } catch (IllegalArgumentException e) {
+                return Optional.empty();
+            }
+        }
+
+        public List<PortNumber> getPorts(Object component) {
+            // FIXME
+            log.warn("Not Implemented Yet!");
+            return new ArrayList<PortNumber>();
+        }
+
+        /**
+         * Get filtered content under <optical-channel><state>.
+         *
+         * @param pc         power config instance
+         * @param port       the port number
+         * @param underState the filter condition
+         * @return RPC reply
+         */
+        public static XMLConfiguration getOpticalChannelState(TerminalDevicePowerConfig pc,
+                                                               PortNumber port, String underState) {
+            NetconfSession session = pc.getNetconfSession(pc.did(), "", "");
+            checkNotNull(session);
+            String name = ocName(pc, port);
+            StringBuilder rpcReq = new StringBuilder(RPC_TAG_NETCONF_BASE);
+            rpcReq.append("<get><filter><components xmlns=\"http://openconfig.net/yang/platform\"><component>")
+                      .append(pc.getOpticalChannelStateRequestRpc(name, underState))
+                      .append(RPC_CLOSE_TAG);
+            XMLConfiguration xconf = pc.executeRpc(session, rpcReq.toString());
+            return xconf;
+        }
+
+
+        /**
+         * Extract component name from portNumber's annotations.
+         *
+         * @param pc         power config instance
+         * @param portNumber the port number
+         * @return the component name
+         */
+        public static String ocName(TerminalDevicePowerConfig pc, PortNumber portNumber) {
+            DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
+            DeviceId deviceId = pc.handler().data().deviceId();
+            return deviceService.getPort(deviceId, portNumber).annotations().value("oc-name");
+        }
+
+
+        /**
+         * Parse filtering string from port and component.
+         *
+         * @param portNumber Port Number
+         * @param component  port component (optical-channel)
+         * @param power      power value set
+         * @param pc      instance of Power config implementation
+         * @return filtering string in xml format
+         */
+        public static String parsePort(TerminalDevicePowerConfig pc, PortNumber portNumber,
+                                        Object component, Double power) {
+            if (component == null) {
+                String name = ocName(pc, portNumber);
+                StringBuilder sb = new StringBuilder("<components xmlns=\"http://openconfig.net/yang/platform\">");
+                if (power != null) {
+                    // This is an edit-config operation.
+                    sb.append(pc.parsePortRequestRpc(power, name));
+                }
+                sb.append("</component>").append("</components>");
+                return sb.toString();
+            } else {
+                log.error("Cannot process the component {}.", component.getClass());
+                return null;
+            }
+        }
+    }
+
+}
+