openflowjava/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/action/OF13SetFieldActionDeserializer.java

   1 /*
   2  * Copyright (c) 2013 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.openflowjava.protocol.impl.deserialization.action;
  10
  11 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  12 import io.netty.buffer.ByteBuf;
  13 import java.util.ArrayList;
  14 import java.util.List;
  15 import java.util.Objects;
  16 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  17 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
  18 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  19 import org.opendaylight.openflowjava.protocol.api.keys.MatchEntryDeserializerKey;
  20 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.action.grouping.ActionChoice;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.action.grouping.action.choice.SetFieldCaseBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.action.grouping.action.choice.set.field._case.SetFieldActionBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.actions.grouping.Action;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.actions.grouping.ActionBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry;
  27
  28 /**
  29  * OF13SetFieldActionDeserializer.
  30  *
  31  * @author michal.polkorab
  32  */
  33 public class OF13SetFieldActionDeserializer extends AbstractActionDeserializer
  34         implements DeserializerRegistryInjector {
  35
  36     private DeserializerRegistry registry;
  37
  38     @Override
  39     @SuppressFBWarnings("UWF_FIELD_NOT_INITIALIZED_IN_CONSTRUCTOR") // FB doesn't recognize Objects.requireNonNull
  40     public Action deserialize(ByteBuf input) {
  41         Objects.requireNonNull(registry);
  42
  43         final  org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.actions.grouping
  44             .ActionBuilder builder = new ActionBuilder();
  45         final int startIndex = input.readerIndex();
  46         input.skipBytes(2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  47         final SetFieldCaseBuilder caseBuilder = new SetFieldCaseBuilder();
  48         SetFieldActionBuilder actionBuilder = new SetFieldActionBuilder();
  49         int oxmClass = input.getUnsignedShort(input.readerIndex());
  50         // get oxm_field & hasMask byte and extract the field value
  51         int oxmField = input.getUnsignedByte(input.readerIndex()
  52                 + EncodeConstants.SIZE_OF_SHORT_IN_BYTES) >>> 1;
  53         MatchEntryDeserializerKey key = new MatchEntryDeserializerKey(EncodeConstants.OF13_VERSION_ID,
  54                 oxmClass, oxmField);
  55         if (oxmClass == EncodeConstants.EXPERIMENTER_VALUE) {
  56             long expId = input.getUnsignedInt(input.readerIndex() + EncodeConstants.SIZE_OF_SHORT_IN_BYTES
  57                     + 2 * EncodeConstants.SIZE_OF_BYTE_IN_BYTES);
  58             key.setExperimenterId(expId);
  59         }
  60         OFDeserializer<MatchEntry> matchDeserializer = registry.getDeserializer(key);
  61         List<MatchEntry> entry = new ArrayList<>();
  62         entry.add(matchDeserializer.deserialize(input));
  63         actionBuilder.setMatchEntry(entry);
  64         caseBuilder.setSetFieldAction(actionBuilder.build());
  65         builder.setActionChoice(caseBuilder.build());
  66         int paddingRemainder = (input.readerIndex() - startIndex) % EncodeConstants.PADDING;
  67         if (paddingRemainder != 0) {
  68             input.skipBytes(EncodeConstants.PADDING - paddingRemainder);
  69         }
  70         return builder.build();
  71     }
  72
  73     @Override
  74     protected ActionChoice getType() {
  75         return new SetFieldCaseBuilder().build();
  76     }
  77
  78     @Override
  79     public void injectDeserializerRegistry(DeserializerRegistry deserializerRegistry) {
  80         this.registry = deserializerRegistry;
  81     }
  82
  83 }