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 org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedInt;
12 import com.google.common.base.Preconditions;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
15 import java.util.ArrayList;
16 import java.util.List;
17 import org.opendaylight.protocol.pcep.spi.CommonObjectParser;
18 import org.opendaylight.protocol.pcep.spi.ObjectSerializer;
19 import org.opendaylight.protocol.pcep.spi.ObjectUtil;
20 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
21 import org.opendaylight.protocol.util.BitArray;
22 import org.opendaylight.protocol.util.ByteBufUtils;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Object;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.ObjectHeader;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.RequestId;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.svec.object.Svec;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.svec.object.SvecBuilder;
30 * Parser for {@link Svec}.
32 public final class PCEPSvecObjectParser extends CommonObjectParser implements ObjectSerializer {
34 private static final int CLASS = 11;
35 private static final int TYPE = 1;
38 * field lengths in bytes
40 private static final int FLAGS_SIZE = 24;
43 * fields offsets in bytes
45 private static final int FLAGS_F_OFFSET = 1;
48 * flags offsets inside flags field in bits
50 private static final int P_FLAG_OFFSET = 19;
51 private static final int D_FLAG_OFFSET = 20;
52 private static final int S_FLAG_OFFSET = 21;
53 private static final int N_FLAG_OFFSET = 22;
54 private static final int L_FLAG_OFFSET = 23;
59 private static final int MIN_SIZE = FLAGS_SIZE / Byte.SIZE + FLAGS_F_OFFSET;
61 public PCEPSvecObjectParser() {
66 public Svec parseObject(final ObjectHeader header, final ByteBuf bytes) throws PCEPDeserializerException {
67 Preconditions.checkArgument(bytes != null && bytes.isReadable(),
68 "Array of bytes is mandatory. Can't be null or empty.");
69 if (bytes.readableBytes() < MIN_SIZE) {
70 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: "
71 + bytes.readableBytes() + "; Expected: >=" + MIN_SIZE + ".");
73 bytes.skipBytes(FLAGS_F_OFFSET);
74 final BitArray flags = BitArray.valueOf(bytes, FLAGS_SIZE);
75 final List<RequestId> requestIDs = new ArrayList<>();
77 while (bytes.isReadable()) {
78 requestIDs.add(new RequestId(ByteBufUtils.readUint32(bytes)));
80 if (requestIDs.isEmpty()) {
81 throw new PCEPDeserializerException("Empty Svec Object - no request ids.");
83 final SvecBuilder builder = new SvecBuilder()
84 .setIgnore(header.isIgnore())
85 .setProcessingRule(header.isProcessingRule())
86 .setLinkDiverse(flags.get(L_FLAG_OFFSET))
87 .setNodeDiverse(flags.get(N_FLAG_OFFSET))
88 .setSrlgDiverse(flags.get(S_FLAG_OFFSET))
89 .setLinkDirectionDiverse(flags.get(D_FLAG_OFFSET))
90 .setPartialPathDiverse(flags.get(P_FLAG_OFFSET))
91 .setRequestsIds(requestIDs);
92 return builder.build();
96 public void serializeObject(final Object object, final ByteBuf buffer) {
97 Preconditions.checkArgument(object instanceof Svec,
98 "Wrong instance of PCEPObject. Passed %s. Needed SvecObject.", object.getClass());
99 final Svec svecObj = (Svec) object;
100 final ByteBuf body = Unpooled.buffer();
101 body.writeZero(FLAGS_F_OFFSET);
102 final BitArray flags = new BitArray(FLAGS_SIZE);
103 flags.set(L_FLAG_OFFSET, svecObj.isLinkDiverse());
104 flags.set(N_FLAG_OFFSET, svecObj.isNodeDiverse());
105 flags.set(S_FLAG_OFFSET, svecObj.isSrlgDiverse());
106 flags.set(D_FLAG_OFFSET, svecObj.isLinkDirectionDiverse());
107 flags.set(P_FLAG_OFFSET, svecObj.isPartialPathDiverse());
108 flags.toByteBuf(body);
110 final List<RequestId> requestIDs = svecObj.getRequestsIds();
111 assert !requestIDs.isEmpty() : "Empty Svec Object - no request ids.";
112 for (final RequestId requestId : requestIDs) {
113 writeUnsignedInt(requestId.getValue(), body);
115 ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer);