private static TryCatch <PartitionMapping <CompositeContinuationToken> > TryGetPartitionKeyRangeToCompositeContinuationToken(
IReadOnlyList <PartitionKeyRange> partitionKeyRanges,
CosmosElement continuationToken)
{
if (continuationToken == null)
{
Dictionary <PartitionKeyRange, CompositeContinuationToken> dictionary = new Dictionary <PartitionKeyRange, CompositeContinuationToken>();
foreach (PartitionKeyRange partitionKeyRange in partitionKeyRanges)
{
dictionary.Add(key: partitionKeyRange, value: null);
}
return(TryCatch <PartitionMapping <CompositeContinuationToken> > .FromResult(
new PartitionMapping <CompositeContinuationToken>(
partitionsLeftOfTarget : new Dictionary <PartitionKeyRange, CompositeContinuationToken>(),
targetPartition : dictionary,
partitionsRightOfTarget : new Dictionary <PartitionKeyRange, CompositeContinuationToken>())));
}
TryCatch <IReadOnlyList <CompositeContinuationToken> > tryParseCompositeContinuationTokens = TryParseCompositeContinuationList(continuationToken);
if (!tryParseCompositeContinuationTokens.Succeeded)
{
return(TryCatch <PartitionMapping <CompositeContinuationToken> > .FromException(tryParseCompositeContinuationTokens.Exception));
}
return(CosmosCrossPartitionQueryExecutionContext.TryGetInitializationInfo <CompositeContinuationToken>(
partitionKeyRanges,
tryParseCompositeContinuationTokens.Result));
}
private static void RunTryGetInitializationInfo(
IReadOnlyDictionary <PartitionKeyRange, IPartitionedToken> expectedMappingLeftPartitions,
IReadOnlyDictionary <PartitionKeyRange, IPartitionedToken> expectedMappingTargetPartition,
IReadOnlyDictionary <PartitionKeyRange, IPartitionedToken> expectedMappingRightPartitions,
IEnumerable <PartitionKeyRange> partitionKeyRanges,
IEnumerable <IPartitionedToken> partitionedTokens)
{
TryCatch <PartitionMapping <IPartitionedToken> > tryGetInitializationInfo = CosmosCrossPartitionQueryExecutionContext.TryGetInitializationInfo(
partitionKeyRanges.OrderBy(x => Guid.NewGuid()).ToArray(),
partitionedTokens.OrderBy(x => Guid.NewGuid()).ToList());
Assert.IsTrue(tryGetInitializationInfo.Succeeded);
PartitionMapping <IPartitionedToken> partitionMapping = tryGetInitializationInfo.Result;
AssertPartitionMappingAreEqual(expectedMappingLeftPartitions, partitionMapping.PartitionsLeftOfTarget);
AssertPartitionMappingAreEqual(expectedMappingTargetPartition, partitionMapping.TargetPartition);
AssertPartitionMappingAreEqual(expectedMappingRightPartitions, partitionMapping.PartitionsRightOfTarget);
}