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;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.Unpooled;
14 import java.util.ArrayList;
15 import java.util.List;
16 import org.opendaylight.protocol.pcep.spi.CommonObjectParser;
17 import org.opendaylight.protocol.pcep.spi.ObjectSerializer;
18 import org.opendaylight.protocol.pcep.spi.ObjectUtil;
19 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
20 import org.opendaylight.protocol.util.BitArray;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Object;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.ObjectHeader;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.RequestId;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.svec.object.Svec;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.svec.object.SvecBuilder;
26 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
29 * Parser for {@link Svec}.
31 public final class PCEPSvecObjectParser extends CommonObjectParser implements ObjectSerializer {
32 private static final int CLASS = 11;
33 private static final int TYPE = 1;
36 * field lengths in bytes
38 private static final int FLAGS_SIZE = 24;
41 * fields offsets in bytes
43 private static final int FLAGS_F_OFFSET = 1;
46 * flags offsets inside flags field in bits
48 private static final int P_FLAG_OFFSET = 19;
49 private static final int D_FLAG_OFFSET = 20;
50 private static final int S_FLAG_OFFSET = 21;
51 private static final int N_FLAG_OFFSET = 22;
52 private static final int L_FLAG_OFFSET = 23;
57 private static final int MIN_SIZE = FLAGS_SIZE / Byte.SIZE + FLAGS_F_OFFSET;
59 public PCEPSvecObjectParser() {
64 public Svec parseObject(final ObjectHeader header, final ByteBuf bytes) throws PCEPDeserializerException {
65 checkArgument(bytes != null && bytes.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
66 if (bytes.readableBytes() < MIN_SIZE) {
67 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: "
68 + bytes.readableBytes() + "; Expected: >=" + MIN_SIZE + ".");
70 bytes.skipBytes(FLAGS_F_OFFSET);
71 final BitArray flags = BitArray.valueOf(bytes, FLAGS_SIZE);
72 final List<RequestId> requestIDs = new ArrayList<>();
74 while (bytes.isReadable()) {
75 requestIDs.add(new RequestId(ByteBufUtils.readUint32(bytes)));
77 if (requestIDs.isEmpty()) {
78 throw new PCEPDeserializerException("Empty Svec Object - no request ids.");
80 return new SvecBuilder()
81 .setIgnore(header.getIgnore())
82 .setProcessingRule(header.getProcessingRule())
83 .setLinkDiverse(flags.get(L_FLAG_OFFSET))
84 .setNodeDiverse(flags.get(N_FLAG_OFFSET))
85 .setSrlgDiverse(flags.get(S_FLAG_OFFSET))
86 .setLinkDirectionDiverse(flags.get(D_FLAG_OFFSET))
87 .setPartialPathDiverse(flags.get(P_FLAG_OFFSET))
88 .setRequestsIds(requestIDs)
93 public void serializeObject(final Object object, final ByteBuf buffer) {
94 checkArgument(object instanceof Svec, "Wrong instance of PCEPObject. Passed %s. Needed SvecObject.",
96 final Svec svecObj = (Svec) object;
97 final ByteBuf body = Unpooled.buffer();
98 body.writeZero(FLAGS_F_OFFSET);
99 final BitArray flags = new BitArray(FLAGS_SIZE);
100 flags.set(L_FLAG_OFFSET, svecObj.getLinkDiverse());
101 flags.set(N_FLAG_OFFSET, svecObj.getNodeDiverse());
102 flags.set(S_FLAG_OFFSET, svecObj.getSrlgDiverse());
103 flags.set(D_FLAG_OFFSET, svecObj.getLinkDirectionDiverse());
104 flags.set(P_FLAG_OFFSET, svecObj.getPartialPathDiverse());
105 flags.toByteBuf(body);
107 final List<RequestId> requestIDs = svecObj.getRequestsIds();
108 // FIXME: remove this assert
109 assert !requestIDs.isEmpty() : "Empty Svec Object - no request ids.";
110 for (final RequestId requestId : requestIDs) {
111 ByteBufUtils.write(body, requestId.getValue());
113 ObjectUtil.formatSubobject(TYPE, CLASS, object.getProcessingRule(), object.getIgnore(), body, buffer);