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

   1 /*
   2  * Copyright (c) 2017 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 io.netty.buffer.ByteBuf;
  12 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.HeaderDeserializer;
  14 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  15 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  16 import org.opendaylight.openflowjava.protocol.impl.util.InstructionConstants;
  17 import org.opendaylight.openflowplugin.api.openflow.protocol.deserialization.MessageCodeExperimenterKey;
  18 import org.opendaylight.openflowplugin.extension.api.path.ActionPath;
  19 import org.opendaylight.openflowplugin.impl.protocol.deserialization.key.MessageCodeActionExperimenterKey;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.Instruction;
  21
  22 /**
  23  * Utility class for action deserialization.
  24  */
  25 public final class InstructionUtil {
  26
  27     private InstructionUtil() {
  28     }
  29
  30     /**
  31      * Deserialize OpenFlow instruction.
  32      *
  33      * @param version  OpenFlow version
  34      * @param message  OpenFlow buffered message
  35      * @param registry deserializer registry
  36      */
  37     @SuppressWarnings("checkstyle:LineLength")
  38     public static Instruction readInstruction(final short version,
  39                                               final ByteBuf message,
  40                                               final DeserializerRegistry registry) {
  41         final int type = message.getUnsignedShort(message.readerIndex());
  42         final OFDeserializer<Instruction> deserializer;
  43
  44         if (InstructionConstants.APPLY_ACTIONS_TYPE == type) {
  45             deserializer = registry.getDeserializer(
  46                     new MessageCodeActionExperimenterKey(
  47                             version, type, Instruction.class,
  48                             ActionPath.FLOWS_STATISTICS_UPDATE_APPLY_ACTIONS,
  49                             null));
  50         } else if (InstructionConstants.WRITE_ACTIONS_TYPE == type) {
  51             deserializer = registry.getDeserializer(
  52                     new MessageCodeActionExperimenterKey(
  53                             version, type, Instruction.class,
  54                             ActionPath.FLOWS_STATISTICS_UPDATE_WRITE_ACTIONS,
  55                             null));
  56         } else {
  57             Long expId = null;
  58
  59             if (EncodeConstants.EXPERIMENTER_VALUE == type) {
  60                 expId = message.getUnsignedInt(message.readerIndex() + 2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  61             }
  62
  63             deserializer = registry.getDeserializer(
  64                     new MessageCodeExperimenterKey(
  65                             version, type, Instruction.class, expId));
  66         }
  67
  68         return deserializer.deserialize(message);
  69     }
  70
  71     /**
  72      * Deserialize OpenFlow instruction header.
  73      *
  74      * @param version  OpenFlow version
  75      * @param message  OpenFlow buffered message
  76      * @param registry deserializer registry
  77      */
  78     @SuppressWarnings("checkstyle:LineLength")
  79     public static Instruction readInstructionHeader(final short version,
  80                                                     final ByteBuf message,
  81                                                     final DeserializerRegistry registry) {
  82         final int type = message.getUnsignedShort(message.readerIndex());
  83         final HeaderDeserializer<Instruction> deserializer;
  84
  85         if (InstructionConstants.APPLY_ACTIONS_TYPE == type) {
  86             deserializer = registry.getDeserializer(
  87                     new MessageCodeActionExperimenterKey(
  88                             version, type, Instruction.class,
  89                             ActionPath.INVENTORY_FLOWNODE_TABLE_APPLY_ACTIONS,
  90                             null));
  91         } else if (InstructionConstants.WRITE_ACTIONS_TYPE == type) {
  92             deserializer = registry.getDeserializer(
  93                     new MessageCodeActionExperimenterKey(
  94                             version, type, Instruction.class,
  95                             ActionPath.INVENTORY_FLOWNODE_TABLE_WRITE_ACTIONS,
  96                             null));
  97         } else {
  98             Long expId = null;
  99
 100             if (EncodeConstants.EXPERIMENTER_VALUE == type) {
 101                 expId = message.getUnsignedInt(message.readerIndex() + 2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
 102             }
 103
 104             deserializer = registry.getDeserializer(
 105                     new MessageCodeExperimenterKey(
 106                             version, type, Instruction.class, expId));
 107         }
 108
 109         return deserializer.deserializeHeader(message);
 110     }
 111
 112 }