public static void CreateAllocation(Participant participant, ITrialDataContext context)
{
//try
//{
if (participant.TrialArm != RandomisationArm.NotSet)
{
throw new InvalidOperationException("participant.TrialArm must have a value of NotSet - use forceallocation if the allocation is pre-set");
}
var currentBlock = Get1stUnfilledBlock(participant, out RandomisationStrata strata, context);
BlockComponent component = currentBlock?.GetComponents();
if (currentBlock == null || context.Participants.Count(p => p.AllocationBlockId == currentBlock.Id) == component.TotalBlockSize())
{
currentBlock = CreateNewAllocationBlock(participant, strata, out component, context);
}
participant.AllocationBlockId = currentBlock.Id;
participant.Block = currentBlock;
participant.TrialArm = BlockRandomisation.NextAllocation(from p in context.Participants
where p.AllocationBlockId == currentBlock.Id
select p.TrialArm, component);
}
static AllocationBlock CreateNewAllocationBlock(Participant participant, RandomisationStrata strata, out BlockComponent component, ITrialDataContext context)
{
var block = GetNextAllocationGroup(participant, strata, context);
component = ArmData.GetRatio(block);
if (participant.Centre == null)
{
participant.Centre = context.StudyCentres.Find(participant.CentreId);
}
var returnVar = new AllocationBlock
{
Id = context.AllocationBlocks.GetNextId(participant.CentreId, participant.Centre.MaxIdForSite),
AllocationGroup = block,
GroupRepeats = component.Repeats,
RandomisationCategory = strata
};
context.AllocationBlocks.Add(returnVar);
return(returnVar);
}
public static RandomisationArm NextAllocation(IEnumerable <RandomisationArm> currentBlock, BlockComponent block, IRandom randomGenerator)
{
return(NextAllocation(currentBlock, block.GetAllocations(), randomGenerator));
}
public static RandomisationArm NextAllocation(IEnumerable <RandomisationArm> currentBlock, BlockComponent block)
{
return(NextAllocation(currentBlock, block, new RandomAdaptor()));
}
