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.spi.TlvHandlerRegistry;
  15 import org.opendaylight.protocol.util.ByteArray;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.NoPathObject;
  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.NoPath;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcrep.message.pcrep.message.replies.result.failure.NoPathBuilder;
  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;
  23 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;
  24 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;
  25
  26 import com.google.common.primitives.UnsignedBytes;
  27
  28 /**
  29  * Parser for {@link NoPathObject}
  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 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                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  68
  69                 final NoPathBuilder builder = new NoPathBuilder();
  70                 builder.setIgnore(header.isIgnore());
  71                 builder.setProcessingRule(header.isProcessingRule());
  72
  73                 builder.setNatureOfIssue((short) UnsignedBytes.toInt(bytes[NI_F_OFFSET]));
  74                 builder.setUnsatisfiedConstraints(flags.get(C_FLAG_OFFSET));
  75                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  76                 return builder.build();
  77         }
  78
  79         @Override
  80         public void addTlv(final NoPathBuilder builder, final Tlv tlv) {
  81                 if (tlv instanceof NoPathVector) {
  82                         builder.setTlvs(new TlvsBuilder().setNoPathVector((NoPathVector) tlv).build());
  83                 }
  84         }
  85
  86         @Override
  87         public byte[] serializeObject(final Object object) {
  88                 if (!(object instanceof NoPathObject)) {
  89                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NoPathObject.");
  90                 }
  91                 final NoPathObject nPObj = (NoPathObject) object;
  92
  93                 final byte[] tlvs = serializeTlvs(((NoPath) nPObj).getTlvs());
  94                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  95                 if (tlvs != null) {
  96                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  97                 }
  98                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  99                 flags.set(C_FLAG_OFFSET, nPObj.isUnsatisfiedConstraints());
 100                 retBytes[NI_F_OFFSET] = UnsignedBytes.checkedCast(nPObj.getNatureOfIssue());
 101                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
 102                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 103                 return retBytes;
 104         }
 105
 106         public byte[] serializeTlvs(final Tlvs tlvs) {
 107                 if (tlvs == null) {
 108                         return new byte[0];
 109                 } else if (tlvs.getNoPathVector() != null) {
 110                         return serializeTlv(tlvs.getNoPathVector());
 111                 }
 112                 return new byte[0];
 113         }
 114
 115         @Override
 116         public int getObjectType() {
 117                 return TYPE;
 118         }
 119
 120         @Override
 121         public int getObjectClass() {
 122                 return CLASS;
 123         }
 124 }