/// <summary>
/// Collects the indexes.
/// </summary>
/// <param name="childName">Name of the child.</param>
/// <param name="sourceContainers">The source containers.</param>
/// <param name="operation">The operation.</param>
/// <returns>True if there is some defined child; otherwise false</returns>
private bool collectIndexes(string childName, List <ContainerContext> sourceContainers, MergeOperation operation)
{
bool childDefined = false;
// Collect source indexes from source collection
foreach (ContainerContext containerContext in sourceContainers)
{
MemoryIndex sourceIndex;
if (containerContext.IndexContainer.TryGetIndex(childName, out sourceIndex))
{
// Collection contains field - use it
operation.Add(new MergeOperationContext(sourceIndex, containerContext.SnapshotContext));
childDefined = true;
}
else
{
// Collection do not contain - use unknown index as source
// When unknown index is the source - all subtree has to be merged into
operation.Add(
new MergeOperationContext(
containerContext.IndexContainer.UnknownIndex,
containerContext.SnapshotContext,
MergeOperationType.WholeSubtree)
);
operation.SetUndefined();
}
}
return(childDefined);
}
/// <summary>
/// Enqueues the merge unknown operation.
/// </summary>
/// <param name="targetContainerContext">The target container context.</param>
/// <param name="anyNode">Any node.</param>
/// <param name="sourceContainers">The source containers.</param>
private void enqueueMergeUnknownOperation(ITargetContainerContext targetContainerContext, MemoryIndexTreeNode anyNode, List <ContainerContext> sourceContainers)
{
MergeOperation unknownOperation = new MergeOperation();
foreach (ContainerContext containerContext in sourceContainers)
{
unknownOperation.Add(new MergeOperationContext(
containerContext.IndexContainer.UnknownIndex, containerContext.SnapshotContext));
}
IReadonlyIndexContainer targetContainer = targetContainerContext.getSourceContainer();
unknownOperation.TreeNode = anyNode;
unknownOperation.SetTargetIndex(targetContainer.UnknownIndex);
unknownOperation.SetUndefined();
operationQueue.AddLast(unknownOperation);
}
