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 io.netty.buffer.ByteBuf;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14
  15 import org.opendaylight.protocol.pcep.impl.object.EROSubobjectUtil;
  16 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  17 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  18 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  19 import org.opendaylight.protocol.pcep.spi.XROSubobjectRegistry;
  20 import org.opendaylight.protocol.util.ByteArray;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.ExrsCase;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.ExrsCaseBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.Exrs;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.ExrsBuilder;
  27
  28 import com.google.common.base.Preconditions;
  29 import com.google.common.collect.Lists;
  30 import com.google.common.primitives.UnsignedBytes;
  31
  32 public class EROExplicitExclusionRouteSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  33
  34         public static final int TYPE = 33;
  35
  36         private static final int HEADER_LENGTH = 2;
  37
  38         private final XROSubobjectRegistry registry;
  39
  40         public EROExplicitExclusionRouteSubobjectParser(final XROSubobjectRegistry registry) {
  41                 this.registry = registry;
  42         }
  43
  44         @Override
  45         public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
  46                 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
  47                 final SubobjectBuilder builder = new SubobjectBuilder();
  48                 builder.setLoose(loose);
  49                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> list = parseSubobject(buffer);
  50                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.exrs.Exrs> exrss = Lists.newArrayList();
  51                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject s : list) {
  52                         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.exrs.ExrsBuilder b = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.exrs.ExrsBuilder();
  53                         b.setAttribute(s.getAttribute());
  54                         b.setMandatory(s.isMandatory());
  55                         b.setSubobjectType(s.getSubobjectType());
  56                         exrss.add(b.build());
  57                 }
  58                 builder.setSubobjectType(new ExrsCaseBuilder().setExrs(new ExrsBuilder().setExrs(exrss).build()).build());
  59                 return builder.build();
  60         }
  61
  62         @Override
  63         public byte[] serializeSubobject(final Subobject subobject) {
  64                 if (!(subobject.getSubobjectType() instanceof ExrsCase)) {
  65                         throw new IllegalArgumentException("Unknown subobject instance. Passed " + subobject.getSubobjectType().getClass()
  66                                         + ". Needed Exrs.");
  67                 }
  68                 final Exrs e = ((ExrsCase) subobject.getSubobjectType()).getExrs();
  69                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> list = new ArrayList<>();
  70                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.explicit.route.subobjects.subobject.type.exrs._case.exrs.Exrs ex : e.getExrs()) {
  71                         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder b = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder();
  72                         b.setAttribute(ex.getAttribute());
  73                         b.setMandatory(ex.isMandatory());
  74                         b.setSubobjectType(ex.getSubobjectType());
  75                         list.add(b.build());
  76                 }
  77                 return EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), serializeSubobject(list));
  78         }
  79
  80         private List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> parseSubobject(
  81                         final ByteBuf buffer) throws PCEPDeserializerException {
  82                 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
  83                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> subs = new ArrayList<>();
  84                 while (buffer.isReadable()) {
  85                         final boolean mandatory = ((buffer.getByte(buffer.readerIndex()) & (1 << 7)) != 0) ? true : false;
  86                         int type = (buffer.readByte() & 0xff) & ~(1 << 7);
  87                         int length = UnsignedBytes.toInt(buffer.readByte()) - HEADER_LENGTH;
  88                         if (length > buffer.readableBytes()) {
  89                                 throw new PCEPDeserializerException("Wrong length specified. Passed: " + length + "; Expected: <= "
  90                                                 + buffer.readableBytes());
  91                         }
  92                         //FIXME: switch to ByteBuf
  93                         subs.add(this.registry.parseSubobject(type, ByteArray.readBytes(buffer, length), mandatory));
  94                 }
  95                 return subs;
  96         }
  97
  98         private byte[] serializeSubobject(
  99                         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> subobjects) {
 100
 101                 final List<byte[]> result = Lists.newArrayList();
 102
 103                 int finalLength = 0;
 104
 105                 for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject subobject : subobjects) {
 106
 107                         final byte[] bytes = this.registry.serializeSubobject(subobject);
 108                         finalLength += bytes.length;
 109                         result.add(bytes);
 110                 }
 111
 112                 final byte[] resultBytes = new byte[finalLength];
 113                 int byteOffset = 0;
 114                 for (final byte[] b : result) {
 115                         System.arraycopy(b, 0, resultBytes, byteOffset, b.length);
 116                         byteOffset += b.length;
 117                 }
 118                 return resultBytes;
 119         }
 120 }