pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPNoPathObjectParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.pcep.impl.object;
   9
  10 import java.util.BitSet;
  11
  12 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  14 import org.opendaylight.protocol.pcep.impl.Util;
  15 import org.opendaylight.protocol.pcep.impl.message.AbstractObjectWithTlvsParser;
  16 import org.opendaylight.protocol.pcep.spi.TlvHandlerRegistry;
  17 import org.opendaylight.protocol.util.ByteArray;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.pcrep.pcrep.message.replies.result.failure.NoPath;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.pcrep.pcrep.message.replies.result.failure.no.path.Tlvs;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.NoPathObject;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.NoPathBuilder;
  25
  26 /**
  27  * Parser for {@link NoPathObject}
  28  */
  29 public class PCEPNoPathObjectParser extends AbstractObjectWithTlvsParser<NoPathBuilder> {
  30
  31         public static final int CLASS = 3;
  32
  33         public static final int TYPE = 1;
  34
  35         /*
  36          * lengths of fields in bytes
  37          */
  38         public static final int NI_F_LENGTH = 1; // multi-field
  39         public static final int FLAGS_F_LENGTH = 2;
  40         public static final int RESERVED_F_LENGTH = 1;
  41
  42         /*
  43          * offsets of field in bytes
  44          */
  45
  46         public static final int NI_F_OFFSET = 0;
  47         public static final int FLAGS_F_OFFSET = NI_F_OFFSET + NI_F_LENGTH;
  48         public static final int RESERVED_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH;
  49         public static final int TLVS_OFFSET = RESERVED_F_OFFSET + RESERVED_F_LENGTH;
  50
  51         /*
  52          * defined flags
  53          */
  54
  55         public static final int C_FLAG_OFFSET = 0;
  56
  57         public PCEPNoPathObjectParser(final TlvHandlerRegistry tlvReg) {
  58                 super(tlvReg);
  59         }
  60
  61         @Override
  62         public NoPathObject parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException,
  63         PCEPDocumentedException {
  64                 if (bytes == null || bytes.length == 0) {
  65                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  66                 }
  67
  68                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  69
  70                 final NoPathBuilder builder = new NoPathBuilder();
  71
  72                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  73
  74                 builder.setIgnore(header.isIgnore());
  75                 builder.setProcessingRule(header.isProcessingRule());
  76
  77                 builder.setNatureOfIssue((short) (bytes[NI_F_OFFSET] & 0xFF));
  78                 builder.setUnsatisfiedConstraints(flags.get(C_FLAG_OFFSET));
  79
  80                 return builder.build();
  81         }
  82
  83         @Override
  84         public void addTlv(final NoPathBuilder builder, final Tlv tlv) {
  85                 // FIXME : add no-path-vector-tlv
  86         }
  87
  88         @Override
  89         public byte[] serializeObject(final Object object) {
  90                 if (!(object instanceof NoPathObject)) {
  91                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NoPathObject.");
  92                 }
  93
  94                 final NoPathObject nPObj = (NoPathObject) object;
  95
  96                 final byte[] tlvs = serializeTlvs(((NoPath) nPObj).getTlvs());
  97                 int tlvsLength = 0;
  98                 if (tlvs != null) {
  99                         tlvsLength = tlvs.length;
 100                 }
 101                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvsLength + Util.getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
 102
 103                 if (tlvs != null) {
 104                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 105                 }
 106                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
 107                 flags.set(C_FLAG_OFFSET, nPObj.isUnsatisfiedConstraints());
 108                 retBytes[NI_F_OFFSET] = ByteArray.shortToBytes(nPObj.getNatureOfIssue())[1];
 109                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
 110                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 111
 112                 return retBytes;
 113         }
 114
 115         public byte[] serializeTlvs(final Tlvs tlvs) {
 116                 if (tlvs.getNoPathVector() != null) {
 117                         // FIXME : add NoPath
 118                         // return serializeTlv(new NoPathVectorBuilder().setFlags(tlvs.getNoPathVector()).build());
 119                 }
 120                 return null;
 121         }
 122
 123         @Override
 124         public int getObjectType() {
 125                 return TYPE;
 126         }
 127
 128         @Override
 129         public int getObjectClass() {
 130                 return CLASS;
 131         }
 132 }