pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/EROExplicitExclusionRouteSubobjectParser.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.subobject;
   9
  10 import java.util.List;
  11
  12 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  14 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  15 import org.opendaylight.protocol.pcep.spi.XROSubobjectHandlerRegistry;
  16 import org.opendaylight.protocol.pcep.spi.XROSubobjectParser;
  17 import org.opendaylight.protocol.pcep.spi.XROSubobjectSerializer;
  18 import org.opendaylight.protocol.util.ByteArray;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Subobjects;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.SubobjectsBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.Exrs;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs.ExrsBuilder;
  23
  24 import com.google.common.collect.Lists;
  25
  26 public class EROExplicitExclusionRouteSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  27
  28         public static final int TYPE = 33;
  29
  30         private static final int RESERVED = 2;
  31
  32         private static final int SUB_TYPE_FLAG_F_LENGTH = 1;
  33         private static final int SUB_LENGTH_F_LENGTH = 1;
  34         private static final int SUB_HEADER_LENGTH = SUB_TYPE_FLAG_F_LENGTH + SUB_LENGTH_F_LENGTH;
  35
  36         private static final int TYPE_FLAG_F_OFFSET = 0;
  37         private static final int LENGTH_F_OFFSET = TYPE_FLAG_F_OFFSET + SUB_TYPE_FLAG_F_LENGTH;
  38         private static final int SO_CONTENTS_OFFSET = LENGTH_F_OFFSET + SUB_LENGTH_F_LENGTH;
  39
  40         private final XROSubobjectHandlerRegistry registry;
  41
  42         public EROExplicitExclusionRouteSubobjectParser(final XROSubobjectHandlerRegistry registry) {
  43                 this.registry = registry;
  44         }
  45
  46         @Override
  47         public Subobjects parseSubobject(final byte[] buffer, final boolean loose) throws PCEPDeserializerException {
  48                 if (buffer == null || buffer.length == 0) {
  49                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  50                 }
  51                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  52                 builder.setLoose(loose);
  53                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects> list = parseSubobjects(buffer);
  54                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs.Exrs> exrss = Lists.newArrayList();
  55                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects s : list) {
  56                         final ExrsBuilder b = new ExrsBuilder();
  57                         b.setAttribute(s.getAttribute());
  58                         b.setMandatory(s.isMandatory());
  59                         b.setSubobjectType(s.getSubobjectType());
  60                         exrss.add(b.build());
  61                 }
  62                 builder.setSubobjectType(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.ExrsBuilder().setExrs(
  63                                 exrss).build());
  64                 return builder.build();
  65         }
  66
  67         @Override
  68         public byte[] serializeSubobject(final Subobjects subobject) {
  69                 if (!(subobject.getSubobjectType() instanceof Exrs)) {
  70                         throw new IllegalArgumentException("Unknown subobject instance. Passed " + subobject.getSubobjectType().getClass()
  71                                         + ". Needed Exrs.");
  72                 }
  73                 final Exrs e = (Exrs) subobject.getSubobjectType();
  74                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects> list = Lists.newArrayList();
  75                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs.Exrs ex : e.getExrs()) {
  76                         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.SubobjectsBuilder b = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.SubobjectsBuilder();
  77                         b.setAttribute(ex.getAttribute());
  78                         b.setMandatory(ex.isMandatory());
  79                         b.setSubobjectType(ex.getSubobjectType());
  80                         list.add(b.build());
  81                 }
  82                 return serializeSubobject(list);
  83         }
  84
  85         private List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects> parseSubobjects(
  86                         final byte[] bytes) throws PCEPDeserializerException {
  87                 if (bytes == null) {
  88                         throw new IllegalArgumentException("Byte array is mandatory.");
  89                 }
  90
  91                 int type;
  92
  93                 byte[] soContentsBytes;
  94                 int length;
  95                 int offset = 0;
  96
  97                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects> subs = Lists.newArrayList();
  98
  99                 while (offset < bytes.length) {
 100
 101                         length = ByteArray.bytesToInt(ByteArray.subByte(bytes, offset + LENGTH_F_OFFSET, SUB_LENGTH_F_LENGTH));
 102
 103                         final boolean mandatory = ((bytes[offset + TYPE_FLAG_F_OFFSET] & (1 << 7)) != 0) ? true : false;
 104                         type = (bytes[offset + TYPE_FLAG_F_OFFSET] & 0xff) & ~(1 << 7);
 105                         if (length > bytes.length - offset) {
 106                                 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= "
 107                                                 + (bytes.length - offset));
 108                         }
 109
 110                         soContentsBytes = new byte[length - SO_CONTENTS_OFFSET];
 111                         System.arraycopy(bytes, offset + SO_CONTENTS_OFFSET, soContentsBytes, 0, length - SO_CONTENTS_OFFSET);
 112
 113                         final XROSubobjectParser parser = this.registry.getSubobjectParser(type);
 114
 115                         subs.add(parser.parseSubobject(soContentsBytes, mandatory));
 116
 117                         offset += length;
 118                 }
 119                 return subs;
 120         }
 121
 122         private final byte[] serializeSubobject(
 123                         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects> subobjects) {
 124
 125                 final List<byte[]> result = Lists.newArrayList();
 126
 127                 int finalLength = 0;
 128
 129                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects subobject : subobjects) {
 130
 131                         final XROSubobjectSerializer serializer = this.registry.getSubobjectSerializer(subobject);
 132
 133                         System.out.println(serializer);
 134
 135                         final byte[] valueBytes = serializer.serializeSubobject(subobject);
 136
 137                         final byte[] bytes = new byte[SUB_HEADER_LENGTH + valueBytes.length];
 138
 139                         final byte typeBytes = (byte) (ByteArray.cutBytes(ByteArray.intToBytes(serializer.getType()), (Integer.SIZE / 8) - 1)[0] | (subobject.isMandatory() ? 1 << 7
 140                                         : 0));
 141                         final byte lengthBytes = ByteArray.cutBytes(ByteArray.intToBytes(valueBytes.length), (Integer.SIZE / 8) - 1)[0];
 142
 143                         bytes[0] = typeBytes;
 144                         bytes[1] = lengthBytes;
 145                         System.arraycopy(valueBytes, 0, bytes, SUB_HEADER_LENGTH, valueBytes.length);
 146
 147                         finalLength += bytes.length;
 148                         result.add(bytes);
 149                 }
 150
 151                 final byte[] resultBytes = new byte[finalLength];
 152                 int byteOffset = 0;
 153                 for (final byte[] b : result) {
 154                         System.arraycopy(b, 0, resultBytes, byteOffset, b.length);
 155                         byteOffset += b.length;
 156                 }
 157                 return resultBytes;
 158         }
 159
 160         @Override
 161         public int getType() {
 162                 return TYPE;
 163         }
 164 }