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.spi.AbstractObjectParser;
  16 import org.opendaylight.protocol.pcep.spi.HandlerRegistry;
  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 AbstractObjectParser<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 HandlerRegistry registry) {
  58                 super(registry);
  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                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  68
  69                 final NoPathBuilder builder = new NoPathBuilder();
  70
  71                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  72
  73                 builder.setIgnore(header.isIgnore());
  74                 builder.setProcessingRule(header.isProcessingRule());
  75
  76                 builder.setNatureOfIssue((short) (bytes[NI_F_OFFSET] & 0xFF));
  77                 builder.setUnsatisfiedConstraints(flags.get(C_FLAG_OFFSET));
  78
  79                 return builder.build();
  80         }
  81
  82         @Override
  83         public void addTlv(final NoPathBuilder builder, final Tlv tlv) {
  84                 // FIXME : add no-path-vector-tlv
  85         }
  86
  87         @Override
  88         public byte[] serializeObject(final Object object) {
  89                 if (!(object instanceof NoPathObject))
  90                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NoPathObject.");
  91
  92                 final NoPathObject nPObj = (NoPathObject) object;
  93
  94                 final byte[] tlvs = serializeTlvs(((NoPath) nPObj).getTlvs());
  95                 int tlvsLength = 0;
  96                 if (tlvs != null)
  97                         tlvsLength = tlvs.length;
  98                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvsLength + Util.getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  99
 100                 if (tlvs != null)
 101                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 102                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
 103                 flags.set(C_FLAG_OFFSET, nPObj.isUnsatisfiedConstraints());
 104                 retBytes[NI_F_OFFSET] = ByteArray.shortToBytes(nPObj.getNatureOfIssue())[1];
 105                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
 106                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 107
 108                 return retBytes;
 109         }
 110
 111         public byte[] serializeTlvs(final Tlvs tlvs) {
 112                 if (tlvs.getNoPathVector() != null) {
 113                         // FIXME : add NoPath
 114                         // return serializeTlv(new NoPathVectorBuilder().setFlags(tlvs.getNoPathVector()).build());
 115                 }
 116                 return null;
 117         }
 118
 119         @Override
 120         public int getObjectType() {
 121                 return TYPE;
 122         }
 123
 124         @Override
 125         public int getObjectClass() {
 126                 return CLASS;
 127         }
 128 }