openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/protocol/deserialization/util/ActionUtil.java

   1 /*
   2  * Copyright (c) 2016 Pantheon Technologies s.r.o. 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.openflowplugin.impl.protocol.deserialization.util;
  10
  11 import java.util.Objects;
  12
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  14 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  15 import org.opendaylight.openflowjava.protocol.api.keys.ActionDeserializerKey;
  16 import org.opendaylight.openflowjava.protocol.api.keys.ExperimenterActionDeserializerKey;
  17 import org.opendaylight.openflowjava.protocol.api.keys.MessageCodeKey;
  18 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  19 import org.opendaylight.openflowplugin.api.openflow.md.util.OpenflowVersion;
  20 import org.opendaylight.openflowplugin.api.openflow.protocol.deserialization.MessageCodeExperimenterKey;
  21 import org.opendaylight.openflowplugin.extension.api.path.ActionPath;
  22 import org.opendaylight.openflowplugin.openflow.md.core.extension.ActionExtensionHelper;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.Action;
  24
  25 import io.netty.buffer.ByteBuf;
  26
  27 /**
  28  * Utility class for action deserialization
  29  */
  30 public class ActionUtil {
  31
  32     /**
  33      * Deserialize OpenFlow action, using extension converter if available
  34      * TODO: Remove also extension converters
  35      *
  36      * @param version OpenFlow version
  37      * @param message OpenFlow buffered message
  38      * @param registry deserializer registry
  39      * @param path Action path
  40      */
  41     public static Action readAction(short version, ByteBuf message, DeserializerRegistry registry,
  42             ActionPath path) {
  43         int type = message.getUnsignedShort(message.readerIndex());
  44         Long expId = null;
  45
  46         if (type == EncodeConstants.EXPERIMENTER_VALUE) {
  47             expId = message.getUnsignedInt(message.readerIndex()
  48                     + 2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  49         }
  50
  51         try {
  52             final MessageCodeExperimenterKey key = new MessageCodeExperimenterKey(
  53                 version, type, Action.class, expId);
  54
  55             final OFDeserializer<Action> deserializer = registry.getDeserializer(key);
  56
  57             return deserializer.deserialize(message);
  58         } catch (IllegalStateException e) {
  59             final MessageCodeKey key = Objects.nonNull(expId)
  60                 ? new ExperimenterActionDeserializerKey(version, expId)
  61                 : new ActionDeserializerKey(version, type, expId);
  62
  63             final OFDeserializer<org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203
  64                 .actions.grouping.Action> deserializer = registry.getDeserializer(key);
  65
  66             return ActionExtensionHelper.processAlienAction(deserializer.deserialize(message),
  67                     OpenflowVersion.get(version), path);
  68         }
  69     }
  70
  71 }