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.spi.AbstractObjectWithTlvsParser;
  13 import org.opendaylight.protocol.pcep.spi.ObjectUtil;
  14 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.spi.TlvRegistry;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure._case.NoPath;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure._case.NoPathBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure._case.no.path.Tlvs;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure._case.no.path.TlvsBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure._case.no.path.tlvs.NoPathVector;
  25
  26 import com.google.common.primitives.UnsignedBytes;
  27
  28 /**
  29  * Parser for {@link NoPath}
  30  */
  31 public class PCEPNoPathObjectParser extends AbstractObjectWithTlvsParser<NoPathBuilder> {
  32
  33         public static final int CLASS = 3;
  34
  35         public static final int TYPE = 1;
  36
  37         /*
  38          * lengths of fields in bytes
  39          */
  40         private static final int NI_F_LENGTH = 1;
  41         private static final int FLAGS_F_LENGTH = 2;
  42         private static final int RESERVED_F_LENGTH = 1;
  43
  44         /*
  45          * offsets of field in bytes
  46          */
  47         private static final int NI_F_OFFSET = 0;
  48         private static final int FLAGS_F_OFFSET = NI_F_OFFSET + NI_F_LENGTH;
  49         private static final int RESERVED_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH;
  50         private static final int TLVS_OFFSET = RESERVED_F_OFFSET + RESERVED_F_LENGTH;
  51
  52         /*
  53          * defined flags
  54          */
  55         private static final int C_FLAG_OFFSET = 0;
  56
  57         public PCEPNoPathObjectParser(final TlvRegistry tlvReg) {
  58                 super(tlvReg);
  59         }
  60
  61         @Override
  62         public NoPath parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  63                 if (bytes == null || bytes.length == 0) {
  64                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  65                 }
  66                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  67
  68                 final NoPathBuilder builder = new NoPathBuilder();
  69                 builder.setIgnore(header.isIgnore());
  70                 builder.setProcessingRule(header.isProcessingRule());
  71
  72                 builder.setNatureOfIssue((short) UnsignedBytes.toInt(bytes[NI_F_OFFSET]));
  73                 builder.setUnsatisfiedConstraints(flags.get(C_FLAG_OFFSET));
  74                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  75                 return builder.build();
  76         }
  77
  78         @Override
  79         public void addTlv(final NoPathBuilder builder, final Tlv tlv) {
  80                 if (tlv instanceof NoPathVector) {
  81                         builder.setTlvs(new TlvsBuilder().setNoPathVector((NoPathVector) tlv).build());
  82                 }
  83         }
  84
  85         @Override
  86         public byte[] serializeObject(final Object object) {
  87                 if (!(object instanceof NoPath)) {
  88                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NoPathObject.");
  89                 }
  90                 final NoPath nPObj = (NoPath) object;
  91
  92                 final byte[] tlvs = serializeTlvs(nPObj.getTlvs());
  93                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  94                 if (tlvs != null) {
  95                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  96                 }
  97                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  98                 flags.set(C_FLAG_OFFSET, nPObj.isUnsatisfiedConstraints());
  99                 retBytes[NI_F_OFFSET] = UnsignedBytes.checkedCast(nPObj.getNatureOfIssue());
 100                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
 101                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 102                 return ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), retBytes);
 103         }
 104
 105         public byte[] serializeTlvs(final Tlvs tlvs) {
 106                 if (tlvs == null) {
 107                         return new byte[0];
 108                 } else if (tlvs.getNoPathVector() != null) {
 109                         return serializeTlv(tlvs.getNoPathVector());
 110                 }
 111                 return new byte[0];
 112         }
 113 }