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 static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedInt;
12 import com.google.common.base.Preconditions;
13 import com.google.common.collect.Lists;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.Unpooled;
16 import java.util.List;
17 import org.opendaylight.protocol.pcep.spi.ObjectParser;
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.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.RequestId;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.svec.object.Svec;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.svec.object.SvecBuilder;
29 * Parser for {@link Svec}
31 public class PCEPSvecObjectParser implements ObjectParser, ObjectSerializer {
33 public static final int CLASS = 11;
35 public 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 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;
60 public Svec parseObject(final ObjectHeader header, final ByteBuf bytes) throws PCEPDeserializerException {
61 Preconditions.checkArgument(bytes != null && bytes.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
62 if (bytes.readableBytes() < MIN_SIZE) {
63 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + bytes.readableBytes() + "; Expected: >="
66 bytes.skipBytes(FLAGS_F_OFFSET);
67 final BitArray flags = BitArray.valueOf(bytes, FLAGS_SIZE);
68 final List<RequestId> requestIDs = Lists.newArrayList();
70 while (bytes.isReadable()) {
71 requestIDs.add(new RequestId(bytes.readUnsignedInt()));
73 if (requestIDs.isEmpty()) {
74 throw new PCEPDeserializerException("Empty Svec Object - no request ids.");
76 final SvecBuilder builder = new SvecBuilder();
78 builder.setIgnore(header.isIgnore());
79 builder.setProcessingRule(header.isProcessingRule());
81 builder.setLinkDiverse(flags.get(L_FLAG_OFFSET));
82 builder.setNodeDiverse(flags.get(N_FLAG_OFFSET));
83 builder.setSrlgDiverse(flags.get(S_FLAG_OFFSET));
84 builder.setRequestsIds(requestIDs);
85 return builder.build();
89 public void serializeObject(final Object object, final ByteBuf buffer) {
90 Preconditions.checkArgument(object instanceof Svec, "Wrong instance of PCEPObject. Passed %s. Needed SvecObject.", object.getClass());
91 final Svec svecObj = (Svec) object;
92 final ByteBuf body = Unpooled.buffer();
93 body.writeZero(FLAGS_F_OFFSET);
94 final BitArray flags = new BitArray(FLAGS_SIZE);
95 flags.set(L_FLAG_OFFSET, svecObj.isLinkDiverse());
96 flags.set(N_FLAG_OFFSET, svecObj.isNodeDiverse());
97 flags.set(S_FLAG_OFFSET, svecObj.isSrlgDiverse());
98 flags.toByteBuf(body);
100 final List<RequestId> requestIDs = svecObj.getRequestsIds();
101 assert !(requestIDs.isEmpty()) : "Empty Svec Object - no request ids.";
102 for(final RequestId requestId : requestIDs) {
103 writeUnsignedInt(requestId.getValue(), body);
105 ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer);