openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/instruction/AbstractInstructionDeserializer.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. 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
   9 package org.opendaylight.openflowjava.protocol.impl.deserialization.instruction;
  10
  11 import io.netty.buffer.ByteBuf;
  12
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.HeaderDeserializer;
  14 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  15 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.ApplyActions;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.ClearActions;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.GotoTable;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.Meter;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.WriteActions;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.WriteMetadata;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.instructions.grouping.Instruction;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.instruction.rev130731.instructions.grouping.InstructionBuilder;
  24
  25 /**
  26  * @author michal.polkorab
  27  *
  28  */
  29 public abstract class AbstractInstructionDeserializer implements OFDeserializer<Instruction>,
  30         HeaderDeserializer<Instruction> {
  31
  32     @Override
  33     public Instruction deserializeHeader(ByteBuf rawMessage) {
  34         InstructionBuilder builder = processHeader(rawMessage);
  35         rawMessage.skipBytes(EncodeConstants.SIZE_OF_SHORT_IN_BYTES);
  36         return builder.build();
  37     }
  38
  39     protected InstructionBuilder processHeader(ByteBuf input) {
  40         InstructionBuilder builder = new InstructionBuilder();
  41         int type = input.readUnsignedShort();
  42         switch (type) {
  43         case 1:
  44             builder.setType(GotoTable.class);
  45             break;
  46         case 2:
  47             builder.setType(WriteMetadata.class);
  48             break;
  49         case 3:
  50             builder.setType(WriteActions.class);
  51             break;
  52         case 4:
  53             builder.setType(ApplyActions.class);
  54             break;
  55         case 5:
  56             builder.setType(ClearActions.class);
  57             break;
  58         case 6:
  59             builder.setType(Meter.class);
  60             break;
  61         default:
  62             throw new IllegalStateException("Unknown instruction type received, type: " + type);
  63         }
  64         return builder;
  65     }
  66 }