pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful07/Stateful07SrpObjectParser.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.ietf.stateful07;
   9
  10 import java.util.Arrays;
  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.TlvHandlerRegistry;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.SrpIdNumber;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.Srp;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.SrpBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.srp.Tlvs;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.srp.TlvsBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.symbolic.path.name.tlv.SymbolicPathName;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  26
  27 /**
  28  * Parser for {@link Srp}
  29  */
  30 public final class Stateful07SrpObjectParser extends AbstractObjectWithTlvsParser<SrpBuilder> {
  31
  32         public static final int CLASS = 33;
  33
  34         public static final int TYPE = 1;
  35
  36         private static final int FLAGS_SIZE = 4;
  37
  38         private static final int SRP_ID_SIZE = 4;
  39
  40         private static final int TLVS_OFFSET = FLAGS_SIZE + SRP_ID_SIZE;
  41
  42         private static final int MIN_SIZE = FLAGS_SIZE + SRP_ID_SIZE;
  43
  44         public Stateful07SrpObjectParser(final TlvHandlerRegistry tlvReg) {
  45                 super(tlvReg);
  46         }
  47
  48         @Override
  49         public Srp parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  50                 if (bytes == null || bytes.length == 0) {
  51                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  52                 }
  53                 if (bytes.length < MIN_SIZE) {
  54                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + bytes.length + "; Expected: >=" + MIN_SIZE
  55                                         + ".");
  56                 }
  57                 if (header.isProcessingRule()) {
  58                         throw new PCEPDeserializerException("Processed flag is set");
  59                 }
  60                 final SrpBuilder builder = new SrpBuilder();
  61                 builder.setIgnore(header.isIgnore());
  62                 builder.setProcessingRule(header.isProcessingRule());
  63                 final byte[] srpId = ByteArray.subByte(bytes, FLAGS_SIZE, SRP_ID_SIZE);
  64                 if (Arrays.equals(srpId, new byte[] { 0, 0, 0, 0 }) || Arrays.equals(srpId, new byte[] { 0xFFFFFFFF })) {
  65                         throw new PCEPDeserializerException("Min/Max values for SRP ID are reserved.");
  66                 }
  67                 builder.setOperationId(new SrpIdNumber(ByteArray.bytesToLong(srpId)));
  68                 return builder.build();
  69         }
  70
  71         @Override
  72         public void addTlv(final SrpBuilder builder, final Tlv tlv) {
  73                 if (tlv instanceof SymbolicPathName) {
  74                         builder.setTlvs(new TlvsBuilder().setSymbolicPathName((SymbolicPathName) tlv).build());
  75                 }
  76         }
  77
  78         @Override
  79         public byte[] serializeObject(final Object object) {
  80                 if (!(object instanceof Srp)) {
  81                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed SrpObject.");
  82                 }
  83                 final Srp srp = (Srp) object;
  84                 final byte[] tlvs = serializeTlvs(srp.getTlvs());
  85                 final Long id = srp.getOperationId().getValue();
  86                 if (id == 0 || id == 0xFFFFFFFFL) {
  87                         throw new IllegalArgumentException("Min/Max values for SRP ID are reserved.");
  88                 }
  89                 final byte[] retBytes = new byte[MIN_SIZE];
  90                 if (tlvs != null) {
  91                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  92                 }
  93                 System.arraycopy(ByteArray.intToBytes(id.intValue(), SRP_ID_SIZE), 0, retBytes, FLAGS_SIZE, SRP_ID_SIZE);
  94                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  95                 return ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), retBytes);
  96         }
  97
  98         public byte[] serializeTlvs(final Tlvs tlvs) {
  99                 if (tlvs == null) {
 100                         return new byte[0];
 101                 } else if (tlvs.getSymbolicPathName() != null) {
 102                         return serializeTlv(tlvs.getSymbolicPathName());
 103                 }
 104                 return new byte[0];
 105         }
 106
 107         @Override
 108         public int getObjectType() {
 109                 return TYPE;
 110         }
 111
 112         @Override
 113         public int getObjectClass() {
 114                 return CLASS;
 115         }
 116 }