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.impl.object;
10 import com.google.common.base.Preconditions;
11 import com.google.common.primitives.UnsignedBytes;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.ByteBufUtil;
14 import java.util.ArrayList;
15 import java.util.List;
16 import org.opendaylight.protocol.pcep.spi.ObjectParser;
17 import org.opendaylight.protocol.pcep.spi.ObjectSerializer;
18 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
19 import org.opendaylight.protocol.pcep.spi.XROSubobjectRegistry;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject;
21 import org.slf4j.Logger;
22 import org.slf4j.LoggerFactory;
24 public abstract class AbstractXROWithSubobjectsParser implements ObjectParser, ObjectSerializer {
26 private static final Logger LOG = LoggerFactory.getLogger(AbstractXROWithSubobjectsParser.class);
28 private static final int HEADER_LENGTH = 2;
30 private final XROSubobjectRegistry subobjReg;
32 protected AbstractXROWithSubobjectsParser(final XROSubobjectRegistry subobjReg) {
33 this.subobjReg = Preconditions.checkNotNull(subobjReg);
36 protected List<Subobject> parseSubobjects(final ByteBuf buffer) throws PCEPDeserializerException {
37 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
38 final List<Subobject> subs = new ArrayList<>();
39 while (buffer.isReadable()) {
40 final boolean mandatory = ((buffer.getByte(buffer.readerIndex()) & (1 << 7)) != 0) ? true : false;
41 int type = UnsignedBytes.checkedCast((buffer.readByte() & 0xff) & ~(1 << 7));
42 int length = UnsignedBytes.toInt(buffer.readByte()) - HEADER_LENGTH;
43 if (length > buffer.readableBytes()) {
44 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= "
45 + buffer.readableBytes());
47 LOG.debug("Attempt to parse subobject from bytes: {}", ByteBufUtil.hexDump(buffer));
48 final Subobject sub = this.subobjReg.parseSubobject(type, buffer.slice(buffer.readerIndex(), length), mandatory);
50 LOG.warn("Unknown subobject type: {}. Ignoring subobject.", type);
52 LOG.debug("Subobject was parsed. {}", sub);
55 buffer.readerIndex(buffer.readerIndex() + length);
60 protected final void serializeSubobject(final List<Subobject> subobjects, final ByteBuf buffer) {
61 Preconditions.checkArgument(subobjects != null && !subobjects.isEmpty(), "XRO must contain at least one subobject.");
62 for (final Subobject subobject : subobjects) {
63 this.subobjReg.serializeSubobject(subobject, buffer);