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.spi.TlvHandlerRegistry;
  14 import org.opendaylight.protocol.util.ByteArray;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.NoPath;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.NoPathBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.no.path.Tlvs;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.no.path.TlvsBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.no.path.tlvs.NoPathVector;
  23
  24 import com.google.common.primitives.UnsignedBytes;
  25
  26 /**
  27  * Parser for {@link NoPath}
  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         private static final int NI_F_LENGTH = 1;
  39         private static final int FLAGS_F_LENGTH = 2;
  40         private static final int RESERVED_F_LENGTH = 1;
  41
  42         /*
  43          * offsets of field in bytes
  44          */
  45         private static final int NI_F_OFFSET = 0;
  46         private static final int FLAGS_F_OFFSET = NI_F_OFFSET + NI_F_LENGTH;
  47         private static final int RESERVED_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH;
  48         private static final int TLVS_OFFSET = RESERVED_F_OFFSET + RESERVED_F_LENGTH;
  49
  50         /*
  51          * defined flags
  52          */
  53         private static final int C_FLAG_OFFSET = 0;
  54
  55         public PCEPNoPathObjectParser(final TlvHandlerRegistry tlvReg) {
  56                 super(tlvReg);
  57         }
  58
  59         @Override
  60         public NoPath parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  61                 if (bytes == null || bytes.length == 0) {
  62                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  63                 }
  64                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  65
  66                 final NoPathBuilder builder = new NoPathBuilder();
  67                 builder.setIgnore(header.isIgnore());
  68                 builder.setProcessingRule(header.isProcessingRule());
  69
  70                 builder.setNatureOfIssue((short) UnsignedBytes.toInt(bytes[NI_F_OFFSET]));
  71                 builder.setUnsatisfiedConstraints(flags.get(C_FLAG_OFFSET));
  72                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  73                 return builder.build();
  74         }
  75
  76         @Override
  77         public void addTlv(final NoPathBuilder builder, final Tlv tlv) {
  78                 if (tlv instanceof NoPathVector) {
  79                         builder.setTlvs(new TlvsBuilder().setNoPathVector((NoPathVector) tlv).build());
  80                 }
  81         }
  82
  83         @Override
  84         public byte[] serializeObject(final Object object) {
  85                 if (!(object instanceof NoPath)) {
  86                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NoPathObject.");
  87                 }
  88                 final NoPath nPObj = (NoPath) object;
  89
  90                 final byte[] tlvs = serializeTlvs(nPObj.getTlvs());
  91                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  92                 if (tlvs != null) {
  93                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  94                 }
  95                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  96                 flags.set(C_FLAG_OFFSET, nPObj.isUnsatisfiedConstraints());
  97                 retBytes[NI_F_OFFSET] = UnsignedBytes.checkedCast(nPObj.getNatureOfIssue());
  98                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
  99                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 100                 return retBytes;
 101         }
 102
 103         public byte[] serializeTlvs(final Tlvs tlvs) {
 104                 if (tlvs == null) {
 105                         return new byte[0];
 106                 } else if (tlvs.getNoPathVector() != null) {
 107                         return serializeTlv(tlvs.getNoPathVector());
 108                 }
 109                 return new byte[0];
 110         }
 111
 112         @Override
 113         public int getObjectType() {
 114                 return TYPE;
 115         }
 116
 117         @Override
 118         public int getObjectClass() {
 119                 return CLASS;
 120         }
 121 }