public override IList<WaveletOperation> ApplyAndReturnReverse(IWaveletData target)
{
WaveletOperation reverse = new NoOp(CreateReverseContext(target));
Apply(target);
return new ReadOnlyCollection<WaveletOperation>(new[] {reverse});
}
/// <summary>
/// Transforms a pair of operations.
/// </summary>
/// <param name="clientOperation">The client's operation.</param>
/// <param name="serverOperation">The server's operation.</param>
/// <returns>The resulting transformed client and server operations.</returns>
public static OperationPair<WaveletOperation> Transform(WaveletOperation clientOperation,
WaveletOperation serverOperation)
{
Preconditions.CheckNotNull(clientOperation);
Preconditions.CheckNotNull(serverOperation);
if (clientOperation is WaveletBlipOperation && serverOperation is WaveletBlipOperation)
{
var clientWaveBlipOp = (WaveletBlipOperation) clientOperation;
var serverWaveBlipOp = (WaveletBlipOperation) serverOperation;
if (clientWaveBlipOp.BlipId.Equals(serverWaveBlipOp.BlipId))
{
// Transform document operations
BlipOperation clientBlipOp = clientWaveBlipOp.BlipOp;
BlipOperation serverBlipOp = serverWaveBlipOp.BlipOp;
OperationPair<BlipOperation> transformedBlipOps = Transform(clientBlipOp, serverBlipOp);
clientOperation = new WaveletBlipOperation(clientWaveBlipOp.BlipId,
transformedBlipOps.ClientOperation);
serverOperation = new WaveletBlipOperation(serverWaveBlipOp.BlipId,
transformedBlipOps.ServerOperation);
}
}
else
{
if (serverOperation is RemoveParticipantOperation)
{
var serverRemoveOp = serverOperation as RemoveParticipantOperation;
CheckParticipantRemoval(serverRemoveOp, clientOperation);
if (clientOperation is RemoveParticipantOperation)
{
var clientRemoveOp = clientOperation as RemoveParticipantOperation;
if (clientRemoveOp.ParticipantId.Equals(serverRemoveOp.ParticipantId))
{
clientOperation = new NoOp(clientRemoveOp.Context);
serverOperation = new NoOp(serverRemoveOp.Context);
}
}
else if (clientOperation is AddParticipantOperation)
{
CheckParticipantRemovalAndAddition(serverRemoveOp, clientOperation as AddParticipantOperation);
}
}
else if (serverOperation is AddParticipantOperation)
{
var serverAddOp = serverOperation as AddParticipantOperation;
if (clientOperation is AddParticipantOperation)
{
var clientAddOp = clientOperation as AddParticipantOperation;
if (clientAddOp.ParticipantId.Equals(serverAddOp.ParticipantId))
{
clientOperation = new NoOp(clientAddOp.Context);
serverOperation = new NoOp(serverAddOp.Context);
}
}
else if (clientOperation is RemoveParticipantOperation)
{
CheckParticipantRemovalAndAddition(
clientOperation as RemoveParticipantOperation,
serverOperation as AddParticipantOperation);
}
}
}
// Apply identity transform by default
return new OperationPair<WaveletOperation>(clientOperation, serverOperation);
}
