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.subobject;
10 import java.util.Arrays;
11 import java.util.BitSet;
13 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
14 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
15 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
16 import org.opendaylight.protocol.pcep.spi.LabelHandlerRegistry;
17 import org.opendaylight.protocol.pcep.spi.LabelParser;
18 import org.opendaylight.protocol.pcep.spi.LabelSerializer;
19 import org.opendaylight.protocol.util.ByteArray;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Subobjects;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.SubobjectsBuilder;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.CLabel;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.LabelSubobject;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.LabelBuilder;
26 import com.google.common.base.Preconditions;
28 public class EROLabelSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
30 public static final int TYPE = 3;
32 private static final int RES_F_LENGTH = 1;
34 private static final int C_TYPE_F_LENGTH = 1;
36 private static final int RES_F_OFFSET = 0;
38 private static final int C_TYPE_F_OFFSET = RES_F_OFFSET + RES_F_LENGTH;
40 private static final int HEADER_LENGTH = C_TYPE_F_OFFSET + C_TYPE_F_LENGTH;
42 private static final int U_FLAG_OFFSET = 0;
44 private final LabelHandlerRegistry registry;
46 public EROLabelSubobjectParser(final LabelHandlerRegistry labelReg) {
47 this.registry = Preconditions.checkNotNull(labelReg);
51 public Subobjects parseSubobject(final byte[] buffer, final boolean loose) throws PCEPDeserializerException {
52 if (buffer == null || buffer.length == 0)
53 throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
54 if (buffer.length < HEADER_LENGTH)
55 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: >"
56 + HEADER_LENGTH + ".");
58 final BitSet reserved = ByteArray.bytesToBitSet(Arrays.copyOfRange(buffer, RES_F_OFFSET, RES_F_LENGTH));
60 final short c_type = (short) (buffer[C_TYPE_F_OFFSET] & 0xFF);
62 final LabelParser parser = this.registry.getLabelParser(c_type);
65 throw new PCEPDeserializerException("Unknown C-TYPE for ero label subobject. Passed: " + c_type);
68 final LabelBuilder builder = new LabelBuilder();
69 builder.setUniDirectional(reserved.get(U_FLAG_OFFSET));
70 builder.setLabelType(parser.parseLabel(ByteArray.cutBytes(buffer, HEADER_LENGTH)));
71 return new SubobjectsBuilder().setLoose(loose).setSubobjectType(builder.build()).build();
75 public byte[] serializeSubobject(final Subobjects subobject) {
76 Preconditions.checkNotNull(subobject.getSubobjectType(), "Subobject type cannot be empty.");
78 final LabelSubobject label = (LabelSubobject) subobject.getSubobjectType();
80 final LabelSerializer serializer = this.registry.getLabelSerializer((CLabel) label);
82 if (serializer == null)
83 throw new IllegalArgumentException("Unknown EROLabelSubobject instance. Passed " + label.getClass());
85 final byte[] labelbytes = serializer.serializeSubobject((CLabel) label);
87 final byte[] retBytes = new byte[labelbytes.length + HEADER_LENGTH];
89 System.arraycopy(labelbytes, 0, retBytes, HEADER_LENGTH, labelbytes.length);
91 final BitSet reserved = new BitSet();
92 reserved.set(U_FLAG_OFFSET, label.isUniDirectional());
93 System.arraycopy(ByteArray.bitSetToBytes(reserved, RES_F_LENGTH), 0, retBytes, RES_F_OFFSET, RES_F_LENGTH);
95 retBytes[C_TYPE_F_OFFSET] = (byte) serializer.getType();
101 public int getType() {