extension/openflowjava-extension-nicira-api/src/main/java/org/opendaylight/openflowjava/nx/api/impl/ActionDeserializer.java

   1 /*
   2  * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.openflowjava.nx.api.impl;
  10
  11 import io.netty.buffer.ByteBuf;
  12
  13 import org.opendaylight.openflowjava.nx.api.NiciraActionDeserializerKey;
  14 import org.opendaylight.openflowjava.nx.api.NiciraConstants;
  15 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  16 import org.opendaylight.openflowjava.protocol.api.keys.ExperimenterActionDeserializerKey;
  17 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.actions.grouping.Action;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21
  22 public class ActionDeserializer implements OFDeserializer<Action> {
  23
  24     private static final Logger LOG = LoggerFactory.getLogger(ActionDeserializer.class);
  25
  26     public static final ExperimenterActionDeserializerKey OF13_DESERIALIZER_KEY = new ExperimenterActionDeserializerKey(
  27             EncodeConstants.OF13_VERSION_ID, NiciraConstants.NX_VENDOR_ID);
  28     public static final ExperimenterActionDeserializerKey OF10_DESERIALIZER_KEY = new ExperimenterActionDeserializerKey(
  29             EncodeConstants.OF10_VERSION_ID, NiciraConstants.NX_VENDOR_ID);
  30
  31     private final short version;
  32
  33     /**
  34      * @param version protocol wire version
  35      */
  36     public ActionDeserializer(short version) {
  37         this.version = version;
  38     }
  39
  40     @Override
  41     public Action deserialize(ByteBuf message) {
  42         int startPossition = message.readerIndex();
  43         // size of experimenter type
  44         message.skipBytes(EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  45         // size of length
  46         message.skipBytes(EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  47         long experimenterId = message.readUnsignedInt();
  48         if (NiciraConstants.NX_VENDOR_ID != experimenterId) {
  49             throw new IllegalStateException("Experimenter ID is not Nicira vendor id but is " + experimenterId);
  50         }
  51         int subtype = message.readUnsignedShort();
  52         NiciraActionDeserializerKey key = new NiciraActionDeserializerKey(version, subtype);
  53         OFDeserializer<Action> actionDeserializer = NiciraExtensionCodecRegistratorImpl.getActionDeserializer(key);
  54         if (actionDeserializer == null) {
  55             LOG.info("No deserializer was found for key {}", key);
  56             return null;
  57         }
  58         message.readerIndex(startPossition);
  59         return actionDeserializer.deserialize(message);
  60     }
  61
  62 }