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 com.google.common.base.Preconditions;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.Unpooled;
13 import java.util.BitSet;
14 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
15 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
16 import org.opendaylight.protocol.pcep.spi.EROSubobjectUtil;
17 import org.opendaylight.protocol.pcep.spi.LabelRegistry;
18 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
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.ero.Subobject;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.LabelCase;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.LabelCaseBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.label._case.Label;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.label._case.LabelBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.label.subobject.LabelType;
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 LabelRegistry registry;
46 public EROLabelSubobjectParser(final LabelRegistry labelReg) {
47 this.registry = Preconditions.checkNotNull(labelReg);
51 public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
52 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
53 if (buffer.readableBytes() < HEADER_LENGTH) {
54 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + "; Expected: >"
55 + HEADER_LENGTH + ".");
57 final BitSet reserved = ByteArray.bytesToBitSet(ByteArray.readBytes(buffer, RES_F_LENGTH));
58 final short cType = buffer.readUnsignedByte();
60 final LabelType labelType = this.registry.parseLabel(cType, buffer.slice());
61 if (labelType == null) {
62 throw new PCEPDeserializerException("Unknown C-TYPE for ero label subobject. Passed: " + cType);
64 final LabelBuilder builder = new LabelBuilder();
65 builder.setUniDirectional(reserved.get(U_FLAG_OFFSET));
66 builder.setLabelType(labelType);
67 return new SubobjectBuilder().setLoose(loose).setSubobjectType(new LabelCaseBuilder().setLabel(builder.build()).build()).build();
71 public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) {
72 Preconditions.checkArgument(subobject.getSubobjectType() instanceof LabelCase, "Unknown subobject instance. Passed %s. Needed LabelCase.", subobject.getSubobjectType().getClass());
73 final Label label = ((LabelCase) subobject.getSubobjectType()).getLabel();
74 final ByteBuf body = Unpooled.buffer();
75 this.registry.serializeLabel(label.isUniDirectional(), false, label.getLabelType(), body);
76 EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), body, buffer);