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 com.google.common.primitives.UnsignedBytes;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
16 import java.util.BitSet;
18 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
19 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
20 import org.opendaylight.protocol.pcep.spi.EROSubobjectUtil;
21 import org.opendaylight.protocol.pcep.spi.LabelRegistry;
22 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
23 import org.opendaylight.protocol.util.ByteArray;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.LabelCase;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.LabelCaseBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.label._case.Label;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.label._case.LabelBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.label.subobject.LabelType;
32 public class EROLabelSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
34 public static final int TYPE = 3;
36 private static final int RES_F_LENGTH = 1;
38 private static final int C_TYPE_F_LENGTH = 1;
40 private static final int RES_F_OFFSET = 0;
42 private static final int C_TYPE_F_OFFSET = RES_F_OFFSET + RES_F_LENGTH;
44 private static final int HEADER_LENGTH = C_TYPE_F_OFFSET + C_TYPE_F_LENGTH;
46 private static final int U_FLAG_OFFSET = 0;
48 private final LabelRegistry registry;
50 public EROLabelSubobjectParser(final LabelRegistry labelReg) {
51 this.registry = Preconditions.checkNotNull(labelReg);
55 public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
56 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
57 if (buffer.readableBytes() < HEADER_LENGTH) {
58 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + "; Expected: >"
59 + HEADER_LENGTH + ".");
61 final BitSet reserved = ByteArray.bytesToBitSet(ByteArray.readBytes(buffer, RES_F_LENGTH));
62 final short cType = (short) UnsignedBytes.toInt(buffer.readByte());
64 final LabelType labelType = this.registry.parseLabel(cType, buffer.slice());
65 if (labelType == null) {
66 throw new PCEPDeserializerException("Unknown C-TYPE for ero label subobject. Passed: " + cType);
68 final LabelBuilder builder = new LabelBuilder();
69 builder.setUniDirectional(reserved.get(U_FLAG_OFFSET));
70 builder.setLabelType(labelType);
71 return new SubobjectBuilder().setLoose(loose).setSubobjectType(new LabelCaseBuilder().setLabel(builder.build()).build()).build();
75 public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) {
76 Preconditions.checkArgument(subobject.getSubobjectType() instanceof LabelCase, "Unknown subobject instance. Passed %s. Needed LabelCase.", subobject.getSubobjectType().getClass());
77 final Label label = ((LabelCase) subobject.getSubobjectType()).getLabel();
78 // FIXME: switch to ByteBuf
79 final byte[] labelbytes = this.registry.serializeLabel(label.isUniDirectional(), false, label.getLabelType());
80 if (labelbytes == null) {
81 throw new IllegalArgumentException("Unknown EROLabelSubobject instance. Passed "
82 + label.getLabelType().getImplementedInterface());
84 EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), Unpooled.copiedBuffer(labelbytes), buffer);