Bump MDSAL to 4.0.0
[bgpcep.git] / bgp / parser-spi / src / main / java / org / opendaylight / protocol / bgp / parser / spi / pojo / SimpleExtendedCommunityRegistry.java
1 /*
2  * Copyright (c) 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 package org.opendaylight.protocol.bgp.parser.spi.pojo;
9
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static org.opendaylight.protocol.bgp.parser.spi.extended.community.ExtendedCommunityUtil.isTransitive;
12 import static org.opendaylight.protocol.util.Values.UNSIGNED_BYTE_MAX_VALUE;
13
14 import com.google.common.primitives.Shorts;
15 import io.netty.buffer.ByteBuf;
16 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
17 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
18 import org.opendaylight.protocol.bgp.parser.spi.extended.community.ExtendedCommunityParser;
19 import org.opendaylight.protocol.bgp.parser.spi.extended.community.ExtendedCommunityRegistry;
20 import org.opendaylight.protocol.bgp.parser.spi.extended.community.ExtendedCommunitySerializer;
21 import org.opendaylight.protocol.concepts.HandlerRegistry;
22 import org.opendaylight.protocol.util.ByteBufWriteUtil;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.ExtendedCommunities;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.ExtendedCommunitiesBuilder;
25 import org.opendaylight.yangtools.concepts.Registration;
26 import org.opendaylight.yangtools.yang.binding.DataContainer;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
29
30 final class SimpleExtendedCommunityRegistry implements ExtendedCommunityRegistry {
31
32     private static final Logger LOG = LoggerFactory.getLogger(SimpleExtendedCommunityRegistry.class);
33
34     private static final int EXTENDED_COMMUNITY_LENGTH = 6;
35
36     private final HandlerRegistry<DataContainer, ExtendedCommunityParser, ExtendedCommunitySerializer> handlers =
37             new HandlerRegistry<>();
38
39     private static int createKey(final int type, final int subtype) {
40         return type << Byte.SIZE | subtype;
41     }
42
43     @Override
44     public ExtendedCommunities parseExtendedCommunity(final ByteBuf buffer)
45             throws BGPDocumentedException, BGPParsingException {
46         final short type = buffer.readUnsignedByte();
47         final short subtype = buffer.readUnsignedByte();
48         final ExtendedCommunityParser parser = this.handlers.getParser(createKey(type, subtype));
49         if (parser == null) {
50             buffer.skipBytes(EXTENDED_COMMUNITY_LENGTH);
51             LOG.info("Skipping unknown extended-community type/sub-type {}/{}.", type, subtype);
52             return null;
53         }
54         return new ExtendedCommunitiesBuilder()
55             .setTransitive(isTransitive(type))
56             .setExtendedCommunity(parser.parseExtendedCommunity(buffer))
57             .build();
58     }
59
60     @Override
61     public void serializeExtendedCommunity(final ExtendedCommunities extendedCommunity, final ByteBuf byteAggregator) {
62         final ExtendedCommunitySerializer serializer = this.handlers.getSerializer(extendedCommunity
63             .getExtendedCommunity().implementedInterface());
64         if (serializer == null) {
65             return;
66         }
67         ByteBufWriteUtil.writeUnsignedByte(Shorts.checkedCast(serializer.getType(extendedCommunity.isTransitive())),
68             byteAggregator);
69         ByteBufWriteUtil.writeUnsignedByte(Shorts.checkedCast(serializer.getSubType()), byteAggregator);
70         serializer.serializeExtendedCommunity(extendedCommunity.getExtendedCommunity(), byteAggregator);
71     }
72
73     synchronized Registration registerExtendedCommunitySerializer(
74             final Class<? extends org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329
75                     .extended.community.ExtendedCommunity> extendedCommunityClass,
76             final ExtendedCommunitySerializer serializer) {
77         return this.handlers.registerSerializer(extendedCommunityClass, serializer);
78     }
79
80     synchronized Registration registerExtendedCommunityParser(final int type, final int subtype,
81             final ExtendedCommunityParser parser) {
82         checkTypes(type, subtype);
83         return this.handlers.registerParser(createKey(type, subtype), parser);
84     }
85
86     private static void checkTypes(final int type, final int subtype) {
87         checkArgument(type >= 0 && type <= UNSIGNED_BYTE_MAX_VALUE, "Illegal extended-community type %s", type);
88         checkArgument(subtype >= 0 && subtype <= UNSIGNED_BYTE_MAX_VALUE, "Illegal extended-community sub-type %s",
89                 subtype);
90     }
91
92 }