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An open source implementation of the Distributed Interactive Simulation (DIS) IEEE-1278 protocol
package edu.nps.moves.dismobile;
import java.util.*;
import java.io.*;
import edu.nps.moves.disenum.*;
import edu.nps.moves.disutil.*;
/**
* Section 5.3.10.4 proivde the means to request a retransmit of a minefield data pdu. COMPLETE
*
* Copyright (c) 2008-2010, MOVES Institute, Naval Postgraduate School. All rights reserved.
* This work is licensed under the BSD open source license, available at https://www.movesinstitute.org/licenses/bsd.html
*
* @author DMcG
*/
public class MinefieldResponseNackPdu extends MinefieldFamilyPdu implements Serializable
{
/** Minefield ID */
protected EntityID minefieldID = new EntityID();
/** entity ID making the request */
protected EntityID requestingEntityID = new EntityID();
/** request ID */
protected short requestID;
/** how many pdus were missing */
protected short numberOfMissingPdus;
/** PDU sequence numbers that were missing */
protected List< EightByteChunk> missingPduSequenceNumbers = new ArrayList();
/** Constructor */
public MinefieldResponseNackPdu()
{
setPduType( (short)40 );
}
public int getMarshalledSize()
{
int marshalSize = 0;
marshalSize = super.getMarshalledSize();
marshalSize = marshalSize + minefieldID.getMarshalledSize(); // minefieldID
marshalSize = marshalSize + requestingEntityID.getMarshalledSize(); // requestingEntityID
marshalSize = marshalSize + 1; // requestID
marshalSize = marshalSize + 1; // numberOfMissingPdus
for(int idx=0; idx < missingPduSequenceNumbers.size(); idx++)
{
EightByteChunk listElement = missingPduSequenceNumbers.get(idx);
marshalSize = marshalSize + listElement.getMarshalledSize();
}
return marshalSize;
}
public void setMinefieldID(EntityID pMinefieldID)
{ minefieldID = pMinefieldID;
}
public EntityID getMinefieldID()
{ return minefieldID;
}
public void setRequestingEntityID(EntityID pRequestingEntityID)
{ requestingEntityID = pRequestingEntityID;
}
public EntityID getRequestingEntityID()
{ return requestingEntityID;
}
public void setRequestID(short pRequestID)
{ requestID = pRequestID;
}
public short getRequestID()
{ return requestID;
}
public short getNumberOfMissingPdus()
{ return (short)missingPduSequenceNumbers.size();
}
/** Note that setting this value will not change the marshalled value. The list whose length this describes is used for that purpose.
* The getnumberOfMissingPdus method will also be based on the actual list length rather than this value.
* The method is simply here for java bean completeness.
*/
public void setNumberOfMissingPdus(short pNumberOfMissingPdus)
{ numberOfMissingPdus = pNumberOfMissingPdus;
}
public void setMissingPduSequenceNumbers(List pMissingPduSequenceNumbers)
{ missingPduSequenceNumbers = pMissingPduSequenceNumbers;
}
public List getMissingPduSequenceNumbers()
{ return missingPduSequenceNumbers; }
public void marshal(DataOutputStream dos)
{
super.marshal(dos);
try
{
minefieldID.marshal(dos);
requestingEntityID.marshal(dos);
dos.writeByte( (byte)requestID);
dos.writeByte( (byte)missingPduSequenceNumbers.size());
for(int idx = 0; idx < missingPduSequenceNumbers.size(); idx++)
{
EightByteChunk aEightByteChunk = missingPduSequenceNumbers.get(idx);
aEightByteChunk.marshal(dos);
} // end of list marshalling
} // end try
catch(Exception e)
{
System.out.println(e);}
} // end of marshal method
public void unmarshal(DataInputStream dis)
{
super.unmarshal(dis);
try
{
minefieldID.unmarshal(dis);
requestingEntityID.unmarshal(dis);
requestID = (short)dis.readUnsignedByte();
numberOfMissingPdus = (short)dis.readUnsignedByte();
for(int idx = 0; idx < numberOfMissingPdus; idx++)
{
EightByteChunk anX = new EightByteChunk();
anX.unmarshal(dis);
missingPduSequenceNumbers.add(anX);
}
} // end try
catch(Exception e)
{
System.out.println(e);
}
} // end of unmarshal method
/**
* Packs a Pdu into the ByteBuffer.
* @throws java.nio.BufferOverflowException if buff is too small
* @throws java.nio.ReadOnlyBufferException if buff is read only
* @see java.nio.ByteBuffer
* @param buff The ByteBuffer at the position to begin writing
* @since ??
*/
public void marshal(java.nio.ByteBuffer buff)
{
super.marshal(buff);
minefieldID.marshal(buff);
requestingEntityID.marshal(buff);
buff.put( (byte)requestID);
buff.put( (byte)missingPduSequenceNumbers.size());
for(int idx = 0; idx < missingPduSequenceNumbers.size(); idx++)
{
EightByteChunk aEightByteChunk = (EightByteChunk)missingPduSequenceNumbers.get(idx);
aEightByteChunk.marshal(buff);
} // end of list marshalling
} // end of marshal method
/**
* Unpacks a Pdu from the underlying data.
* @throws java.nio.BufferUnderflowException if buff is too small
* @see java.nio.ByteBuffer
* @param buff The ByteBuffer at the position to begin reading
* @since ??
*/
public void unmarshal(java.nio.ByteBuffer buff)
{
super.unmarshal(buff);
minefieldID.unmarshal(buff);
requestingEntityID.unmarshal(buff);
requestID = (short)(buff.get() & 0xFF);
numberOfMissingPdus = (short)(buff.get() & 0xFF);
for(int idx = 0; idx < numberOfMissingPdus; idx++)
{
EightByteChunk anX = new EightByteChunk();
anX.unmarshal(buff);
missingPduSequenceNumbers.add(anX);
}
} // end of unmarshal method
/*
* The equals method doesn't always work--mostly it works only on classes that consist only of primitives. Be careful.
*/
@Override
public boolean equals(Object obj)
{
if(this == obj){
return true;
}
if(obj == null){
return false;
}
if(getClass() != obj.getClass())
return false;
return equalsImpl(obj);
}
@Override
public boolean equalsImpl(Object obj)
{
boolean ivarsEqual = true;
if(!(obj instanceof MinefieldResponseNackPdu))
return false;
final MinefieldResponseNackPdu rhs = (MinefieldResponseNackPdu)obj;
if( ! (minefieldID.equals( rhs.minefieldID) )) ivarsEqual = false;
if( ! (requestingEntityID.equals( rhs.requestingEntityID) )) ivarsEqual = false;
if( ! (requestID == rhs.requestID)) ivarsEqual = false;
if( ! (numberOfMissingPdus == rhs.numberOfMissingPdus)) ivarsEqual = false;
for(int idx = 0; idx < missingPduSequenceNumbers.size(); idx++)
{
if( ! ( missingPduSequenceNumbers.get(idx).equals(rhs.missingPduSequenceNumbers.get(idx)))) ivarsEqual = false;
}
return ivarsEqual && super.equalsImpl(rhs);
}
} // end of class