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.Preconditions;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.ByteBufUtil;
15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
16 import org.slf4j.Logger;
17 import org.slf4j.LoggerFactory;
19 public abstract class AbstractObjectWithTlvsParser<T> implements ObjectParser, ObjectSerializer {
21 private static final Logger LOG = LoggerFactory.getLogger(AbstractObjectWithTlvsParser.class);
23 private static final int TLV_TYPE_F_LENGTH = 2;
24 private static final int TLV_LENGTH_F_LENGTH = 2;
25 private static final int TLV_HEADER_LENGTH = TLV_LENGTH_F_LENGTH + TLV_TYPE_F_LENGTH;
27 protected static final int PADDED_TO = 4;
29 private final TlvRegistry tlvReg;
31 protected AbstractObjectWithTlvsParser(final TlvRegistry tlvReg) {
32 this.tlvReg = Preconditions.checkNotNull(tlvReg);
35 protected final void parseTlvs(final T builder, final ByteBuf bytes) throws PCEPDeserializerException {
36 Preconditions.checkArgument(bytes != null, "Array of bytes is mandatory. Can't be null.");
37 if (!bytes.isReadable()) {
40 while (bytes.isReadable()) {
41 int type = bytes.readUnsignedShort();
42 int length = bytes.readUnsignedShort();
43 if (length > bytes.readableBytes()) {
44 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= " + bytes.readableBytes()
47 final ByteBuf tlvBytes = bytes.slice(bytes.readerIndex(), length);
48 LOG.trace("Attempt to parse tlv from bytes: {}", ByteBufUtil.hexDump(tlvBytes));
49 final Tlv tlv = this.tlvReg.parseTlv(type, tlvBytes);
50 LOG.trace("Tlv was parsed. {}", tlv);
52 bytes.readerIndex(bytes.readerIndex() + length + getPadding(TLV_HEADER_LENGTH + length, PADDED_TO));
56 protected final void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
57 Preconditions.checkNotNull(tlv, "PCEP TLV is mandatory.");
58 LOG.trace("Serializing PCEP TLV {}", tlv);
59 this.tlvReg.serializeTlv(tlv, buffer);
60 LOG.trace("Serialized PCEP TLV {}.", ByteBufUtil.hexDump(buffer));
63 protected void addTlv(final T builder, final Tlv tlv) {
64 // FIXME: No TLVs by default, fallback to augments
67 public static int getPadding(final int length, final int padding) {
68 return (padding - (length % padding)) % padding;