2 * Copyright (c) 2013 Cisco Systems, Inc. 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
8 package org.opendaylight.protocol.pcep.parser.object;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.primitives.UnsignedBytes;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.ByteBufUtil;
16 import java.util.ArrayList;
17 import java.util.List;
18 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
19 import org.opendaylight.protocol.pcep.spi.CommonObjectParser;
20 import org.opendaylight.protocol.pcep.spi.ObjectSerializer;
21 import org.opendaylight.protocol.pcep.spi.XROSubobjectRegistry;
22 import org.opendaylight.protocol.util.Values;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.exclude.route.object.xro.Subobject;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
27 public abstract class AbstractXROWithSubobjectsParser extends CommonObjectParser implements ObjectSerializer {
29 private static final Logger LOG = LoggerFactory.getLogger(AbstractXROWithSubobjectsParser.class);
31 private static final int HEADER_LENGTH = 2;
33 private final XROSubobjectRegistry subobjReg;
35 protected AbstractXROWithSubobjectsParser(final XROSubobjectRegistry subobjReg,
36 final int objectClass, final int objectType) {
37 super(objectClass, objectType);
38 this.subobjReg = requireNonNull(subobjReg);
41 protected List<Subobject> parseSubobjects(final ByteBuf buffer) throws PCEPDeserializerException {
42 checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
43 final List<Subobject> subs = new ArrayList<>();
44 while (buffer.isReadable()) {
45 final boolean mandatory =
46 (buffer.getUnsignedByte(buffer.readerIndex()) & 1 << Values.FIRST_BIT_OFFSET) != 0;
47 final int type = UnsignedBytes.checkedCast(buffer.readUnsignedByte() & Values.BYTE_MAX_VALUE_BYTES
48 & ~(1 << Values.FIRST_BIT_OFFSET));
49 final int length = buffer.readUnsignedByte() - HEADER_LENGTH;
50 if (length > buffer.readableBytes()) {
51 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= "
52 + buffer.readableBytes());
54 LOG.debug("Attempt to parse subobject from bytes: {}", ByteBufUtil.hexDump(buffer));
55 final Subobject sub = subobjReg.parseSubobject(type, buffer.readSlice(length), mandatory);
57 LOG.warn("Parsing failed for subobject type: {}. Ignoring subobject.", type);
59 LOG.debug("Subobject was parsed. {}", sub);
66 protected final void serializeSubobject(final List<Subobject> subobjects, final ByteBuf buffer) {
67 checkArgument(subobjects != null && !subobjects.isEmpty(), "XRO must contain at least one subobject.");
68 for (final Subobject subobject : subobjects) {
69 subobjReg.serializeSubobject(subobject, buffer);