f4689ce110f2acc4c596fac3e52a8b777fa714cd
[openflowplugin.git] / 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 import org.opendaylight.yangtools.yang.common.Uint32;
28
29 /**
30  * OF13SetFieldActionDeserializer.
31  *
32  * @author michal.polkorab
33  */
34 public class OF13SetFieldActionDeserializer extends AbstractActionDeserializer
35         implements DeserializerRegistryInjector {
36
37     private DeserializerRegistry registry;
38
39     @Override
40     @SuppressFBWarnings("UWF_FIELD_NOT_INITIALIZED_IN_CONSTRUCTOR") // FB doesn't recognize Objects.requireNonNull
41     public Action deserialize(final ByteBuf input) {
42         Objects.requireNonNull(registry);
43
44         final  org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev150203.actions.grouping
45             .ActionBuilder builder = new ActionBuilder();
46         final int startIndex = input.readerIndex();
47         input.skipBytes(2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
48         final SetFieldCaseBuilder caseBuilder = new SetFieldCaseBuilder();
49         SetFieldActionBuilder actionBuilder = new SetFieldActionBuilder();
50         int oxmClass = input.getUnsignedShort(input.readerIndex());
51         // get oxm_field & hasMask byte and extract the field value
52         int oxmField = input.getUnsignedByte(input.readerIndex()
53                 + EncodeConstants.SIZE_OF_SHORT_IN_BYTES) >>> 1;
54         MatchEntryDeserializerKey key = new MatchEntryDeserializerKey(EncodeConstants.OF13_VERSION_ID,
55                 oxmClass, oxmField);
56         if (oxmClass == EncodeConstants.EXPERIMENTER_VALUE) {
57             long expId = input.getUnsignedInt(input.readerIndex() + EncodeConstants.SIZE_OF_SHORT_IN_BYTES
58                     + 2 * EncodeConstants.SIZE_OF_BYTE_IN_BYTES);
59             key.setExperimenterId(Uint32.valueOf(expId));
60         }
61         OFDeserializer<MatchEntry> matchDeserializer = registry.getDeserializer(key);
62         List<MatchEntry> entry = new ArrayList<>();
63         entry.add(matchDeserializer.deserialize(input));
64         actionBuilder.setMatchEntry(entry);
65         caseBuilder.setSetFieldAction(actionBuilder.build());
66         builder.setActionChoice(caseBuilder.build());
67         int paddingRemainder = (input.readerIndex() - startIndex) % EncodeConstants.PADDING;
68         if (paddingRemainder != 0) {
69             input.skipBytes(EncodeConstants.PADDING - paddingRemainder);
70         }
71         return builder.build();
72     }
73
74     @Override
75     protected ActionChoice getType() {
76         return new SetFieldCaseBuilder().build();
77     }
78
79     @Override
80     public void injectDeserializerRegistry(final DeserializerRegistry deserializerRegistry) {
81         this.registry = deserializerRegistry;
82     }
83
84 }