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.spi;
10 import com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
12 import com.google.common.collect.Lists;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.ByteBufUtil;
17 import java.util.List;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.iana.rev130816.EnterpriseNumber;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.vendor.information.tlvs.VendorInformationTlv;
22 import org.slf4j.Logger;
23 import org.slf4j.LoggerFactory;
25 public abstract class AbstractObjectWithTlvsParser<T> implements ObjectParser, ObjectSerializer {
27 private static final Logger LOG = LoggerFactory.getLogger(AbstractObjectWithTlvsParser.class);
29 public static final int PADDED_TO = 4;
31 private final TlvRegistry tlvReg;
33 private final VendorInformationTlvRegistry viTlvReg;
35 protected AbstractObjectWithTlvsParser(final TlvRegistry tlvReg, final VendorInformationTlvRegistry viTlvReg) {
36 this.tlvReg = Preconditions.checkNotNull(tlvReg);
37 this.viTlvReg = Preconditions.checkNotNull(viTlvReg);
40 protected final void parseTlvs(final T builder, final ByteBuf bytes) throws PCEPDeserializerException {
41 Preconditions.checkArgument(bytes != null, "Array of bytes is mandatory. Can't be null.");
42 if (!bytes.isReadable()) {
45 final List<VendorInformationTlv> viTlvs = Lists.newArrayList();
46 while (bytes.isReadable()) {
47 int type = bytes.readUnsignedShort();
48 int length = bytes.readUnsignedShort();
49 if (length > bytes.readableBytes()) {
50 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= " + bytes.readableBytes()
53 final ByteBuf tlvBytes = bytes.slice(bytes.readerIndex(), length);
54 LOG.trace("Parsing PCEP TLV : {}", ByteBufUtil.hexDump(tlvBytes));
56 if (VendorInformationUtil.isVendorInformationTlv(type)) {
57 final EnterpriseNumber enterpriseNumber = new EnterpriseNumber(tlvBytes.readUnsignedInt());
58 final Optional<VendorInformationTlv> viTlv = this.viTlvReg.parseVendorInformationTlv(enterpriseNumber, tlvBytes);
59 if(viTlv.isPresent()) {
60 LOG.trace("Parsed VENDOR-INFORMATION TLV {}.", viTlv.get());
61 viTlvs.add(viTlv.get());
64 final Tlv tlv = this.tlvReg.parseTlv(type, tlvBytes);
66 LOG.trace("Parsed PCEP TLV {}.", tlv);
70 bytes.skipBytes(length + TlvUtil.getPadding(TlvUtil.HEADER_SIZE + length, TlvUtil.PADDED_TO));
72 addVendorInformationTlvs(builder, viTlvs);
75 protected final void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
76 Preconditions.checkNotNull(tlv, "PCEP TLV is mandatory.");
77 LOG.trace("Serializing PCEP TLV {}", tlv);
78 this.tlvReg.serializeTlv(tlv, buffer);
79 LOG.trace("Serialized PCEP TLV : {}.", ByteBufUtil.hexDump(buffer));
82 protected void addTlv(final T builder, final Tlv tlv) {
83 // FIXME: No TLVs by default, fallback to augments
86 abstract protected void addVendorInformationTlvs(final T builder, final List<VendorInformationTlv> tlvs);
88 protected final void serializeVendorInformationTlvs(final List<VendorInformationTlv> tlvs, final ByteBuf buffer) {
89 if (tlvs != null && !tlvs.isEmpty()) {
90 for (final VendorInformationTlv tlv : tlvs) {
91 LOG.trace("Serializing VENDOR-INFORMATION TLV {}", tlv);
92 this.viTlvReg.serializeVendorInformationTlv(tlv, buffer);
93 LOG.trace("Serialized VENDOR-INFORMATION TLV : {}.", ByteBufUtil.hexDump(buffer));