2 * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
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
9 package org.opendaylight.openflowjava.protocol.impl.util;
11 import io.netty.buffer.ByteBuf;
12 import java.util.ArrayList;
13 import java.util.List;
14 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
15 import org.opendaylight.openflowjava.protocol.api.extensibility.HeaderDeserializer;
16 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
17 import org.opendaylight.openflowjava.protocol.api.keys.MessageCodeKey;
18 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
19 import org.opendaylight.yangtools.yang.binding.DataObject;
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
26 * @author michal.polkorab
28 public final class ListDeserializer {
29 private static final Logger LOG = LoggerFactory.getLogger(ListDeserializer.class);
31 private ListDeserializer() {
32 throw new UnsupportedOperationException("Utility class shouldn't be instantiated");
36 * Deserializes items into list.
38 * @param version openflow wire version
39 * @param length length of list in ByteBuf (bytes)
40 * @param input input buffer
41 * @param keyMaker creates keys for deserializer lookup
42 * @param registry stores deserializers
43 * @return list of items
45 public static <E extends DataObject> List<E> deserializeList(short version, int length,
46 ByteBuf input, CodeKeyMaker keyMaker, DeserializerRegistry registry) {
48 if (input.readableBytes() > 0) {
49 items = new ArrayList<>();
50 int startIndex = input.readerIndex();
51 while (input.readerIndex() - startIndex < length) {
52 OFDeserializer<E> deserializer = registry.getDeserializer(keyMaker.make(input));
53 E item = deserializer.deserialize(input);
61 * Deserializes headers of items into list (used in MultipartReplyMessage - Table features).
63 * @param version openflow wire version
64 * @param length length of list in ByteBuf (bytes)
65 * @param input input buffer
66 * @param keyMaker creates keys for deserializer lookup
67 * @param registry stores deserializers
68 * @return list of items
70 public static <E extends DataObject> List<E> deserializeHeaders(short version, int length,
71 ByteBuf input, CodeKeyMaker keyMaker, DeserializerRegistry registry) {
73 if (input.readableBytes() > 0) {
74 items = new ArrayList<>();
75 int startIndex = input.readerIndex();
76 boolean exceptionLogged = false;
77 while (input.readerIndex() - startIndex < length) {
78 HeaderDeserializer<E> deserializer;
79 MessageCodeKey key = keyMaker.make(input);
81 deserializer = registry.getDeserializer(key);
82 } catch (ClassCastException | IllegalStateException e) {
83 // Following "if" is only hotfix to prevent log flooding. Log flooding is originally
84 // caused by using OVS 2.4 which directly uses / reports Nicira extensions. These extensions
85 // are not yet (2nd February 2016) fully supported by existing OF Plugin.
86 // TODO - simplify to correctly report exception during deserialization
87 if (!exceptionLogged) {
88 LOG.warn("Problem during reading table feature property. Skipping unknown feature property: {}."
89 + "If more information is needed, set org.opendaylight.openflowjava do DEBUG log level "
90 + " ({}).", key, e.getMessage());
91 if (LOG.isDebugEnabled()) {
92 LOG.debug("Detailed exception is logged only once for each multipart reply (table features)"
93 + "to prevent log flooding. There might be more of table features related exceptions.",
96 exceptionLogged = true;
98 input.skipBytes(2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
101 E item = deserializer.deserializeHeader(input);