/// <summary>
/// Writes the rowsToWrite to the specified target.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="rowsToWrite">
/// The rowsToWrite.
/// </param>
/// <param name="upsert">
/// True to also update records, false to insert.
/// </param>
/// <returns>
/// The <see cref="Task"/>.
/// </returns>
public async Task <long> WriteRowsAsync([NotNull] IExecutionContext context, IAsyncEnumerable <Row> rowsToWrite, bool upsert)
{
var builder = context.CreateBuilder <Row>();
if (this.rows == null)
{
this.rows = await rowsToWrite.MaterializeAsync();
return(this.rows.Count);
}
var originalCount = this.rows.Count;
if (upsert)
{
await builder.AddAsync(this.rows.Union(rowsToWrite, new RowUniqueIdComparer()));
}
else
{
await builder.AddAsync(this.rows).ConfigureAwait(false);
await builder.AddAsync(rowsToWrite).ConfigureAwait(false);
}
this.rows = await builder.BuildAsync().ConfigureAwait(false);
return(this.rows.Count - originalCount);
}
/// <summary>
/// Moves to the next batch. Implemented as a state machine.
/// </summary>
/// <returns>
/// <c>true</c> if another batch is available, <c>false</c> otherwise.
/// </returns>
protected override async Task <IEnumerator <IAsyncGrouping <TSource, TKey> > > OnNextBatchAsync()
{
switch (this.state)
{
case 0: // Initial, sort the source, and return the first groupings.
Comparison <SourceKey <TSource, TKey> > comparison = (first, second) => this.comparer.Compare(first.Key, second.Key);
this.sorted = await this.source.Policy.SortAsync(this.source, comparison).ConfigureAwait(false);
this.enumerator = this.sorted.GetAsyncEnumerator();
this.state = 1;
return(this.EnumerateGroupings());
case 1: // Continue, return the next groupings.
if (!await this.enumerator.NextBatchAsync().ConfigureAwait(false))
{
this.state = 2;
return(this.offset == this.lastOffset
? null
: GroupByEnumerator <TSource, TKey> .EnumerateItem(new AsyncGrouping <TSource, TKey>(this.lastKey, this.sorted, this.lastOffset, this.offset - this.lastOffset)));
}
return(this.EnumerateGroupings());
case 2: // Done, no more groupings available.
return(null);
case 3: // Disposed, throw error.
throw new ObjectDisposedException(this.GetType().ToString());
default: // Shouldn't happen.
throw new InvalidOperationException($"Invalid state: {this.state}.");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="JoinEnumerator{TLeft,TRight,TKey,TResult}"/> class.
/// </summary>
/// <param name="isLeftJoin">
/// The is left join.
/// </param>
/// <param name="isPreSorted">
/// True if both <see cref="IAsyncEnumerable{T}"/>s are already sorted.
/// </param>
/// <param name="left">
/// The left.
/// </param>
/// <param name="right">
/// The right.
/// </param>
/// <param name="leftKey">
/// The left key.
/// </param>
/// <param name="joinOperator">
/// The operator to use when joining.
/// </param>
/// <param name="rightKey">
/// The right key.
/// </param>
/// <param name="resultFilter">
/// The result filter.
/// </param>
/// <param name="resultSelector">
/// The result selector.
/// </param>
/// <param name="keyComparer">
/// The key comparer.
/// </param>
public JoinEnumerator(bool isLeftJoin, bool isPreSorted, IAsyncEnumerable <TLeft> left, IAsyncEnumerable <TRight> right, Func <TLeft, TKey> leftKey, ExpressionType joinOperator, Func <TRight, TKey> rightKey, Func <TLeft, TRight, bool> resultFilter, Func <TLeft, TRight, TResult> resultSelector, [NotNull] IComparer <TKey> keyComparer)
{
this.left = left;
this.right = right;
this.leftKey = leftKey;
this.joinOperator = joinOperator;
this.rightKey = rightKey;
this.resultSelector = resultSelector;
this.keyComparison = keyComparer.Compare;
this.isLeftJoin = isLeftJoin;
this.resultFilter = resultFilter;
if (this.joinOperator == ExpressionType.GreaterThan)
{ // Invert the comparison order and do a less than or equal join instead.
this.joinOperator = ExpressionType.LessThanOrEqual;
this.keyComparison = (x, y) => - keyComparer.Compare(x, y);
}
if (this.joinOperator == ExpressionType.GreaterThanOrEqual)
{ // Invert the comparison order and do a less than join instead.
this.joinOperator = ExpressionType.LessThan;
this.keyComparison = (x, y) => - keyComparer.Compare(x, y);
}
this.materializedRight = this.right as IAsyncReadOnlyCollection <TRight>;
if (this.materializedRight != null && isPreSorted)
{
this.leftEnumerator = this.left.GetAsyncEnumerator();
this.rightEnumerator = this.materializedRight.GetAsyncEnumerator();
this.IsSynchronous = this.leftEnumerator.IsSynchronous && this.rightEnumerator.IsSynchronous;
}
}
/*
* /// <summary>
* /// Retrieves the data from the source.
* /// </summary>
* /// <param name="context">
* /// The context.
* /// </param>
* /// <param name="query">
* /// The query expression. Can be <c>null</c>.
* /// </param>
* /// <returns>
* /// A task returning the data set.
* /// </returns>
* public async Task<DataSet> GetDataAsync(IExecutionContext context, IQuery query)
* {
*
* var leftRows = await context.MaterializeAsync(await this.GetDataAsync(context, this.left, query, query.GetFilter(context), Enumerable.Empty<OrderByExpression>()).ConfigureAwait(false)).ConfigureAwait(false);
*
* if (leftRows.Count == 0)
* {
* return DataSet.Empty();
* }
*
* var sortOrders = new List<OrderByExpression>();
* var filter = await this.CreateJoinFilterAsync(context, leftRows, sortOrders);
* var rightRows = await context.MaterializeAsync(await this.GetDataAsync(context, this.right, query, filter, sortOrders).ConfigureAwait(false));
*
* if (rightRows.Count == 0)
* {
* return this.isInnerJoin ? DataSet.Empty() : DataSet.FromEnumerable(rightRows);
* }
*
* var joinFilter = this.GetFilter(context);
*
* return null;
* }
*/
/// <summary>
/// Creates the join filter.
/// </summary>
/// <param name="context">
/// The execution context.
/// </param>
/// <param name="leftRows">
/// The left rows.
/// </param>
/// <param name="sortOrders">
/// Will be filled with the sort orders for this join.
/// </param>
/// <returns>
/// A task containing the the filter expression.
/// </returns>
private Task <Expression> CreateJoinFilterAsync(IExecutionContext context, IAsyncReadOnlyCollection <Row> leftRows, ICollection <OrderByExpression> sortOrders)
{
var filter = (Expression)null; // await this.GetFilter(context, null).ToRangedExpressionAsync(leftRows, this.right.Aliases);
return(Task.FromResult(new GenericVisitor
{
(GenericVisitor visitor, BinaryExpression node) =>
{
if (node.NodeType != ExpressionType.And && node.NodeType != ExpressionType.AndAlso)
{
return null;
}
Expression leftSide, rightSide;
if (((leftSide = visitor.Visit(node.Left)) as ConstantExpression)?.Value?.Equals(true) ?? false)
{
return visitor.Visit(node.Right);
}
if (((rightSide = visitor.Visit(node.Right)) as ConstantExpression)?.Value?.Equals(true) ?? false)
{
return visitor.Visit(node.Left);
}
return Expression.MakeBinary(ExpressionType.AndAlso, leftSide, rightSide);
},
(RangeExpression node) =>
node.Type == typeof(bool) && object.Equals(node.Min, false) && object.Equals(node.Max, true)
? (Expression)Expression.Constant(true)
: node,
(CompareExpression node) =>
{
var field = node.Left as SourceFieldExpression;
var range = node.Right as RangeExpression;
if (field == null || range == null)
{
return null;
}
switch (node.CompareType)
{
case ExpressionType.GreaterThan:
case ExpressionType.GreaterThanOrEqual:
case ExpressionType.LessThan:
case ExpressionType.LessThanOrEqual:
sortOrders.Add(
new OrderByExpression(
CustomExpression.MakeSourceField(field.SourceName, field.FieldName),
node.CompareType == ExpressionType.GreaterThan || node.CompareType == ExpressionType.GreaterThanOrEqual));
break;
}
return Expression.AndAlso(
CustomExpression.MakeCompare(ExpressionType.GreaterThanOrEqual, field, Expression.Constant(range.Min, range.Type)),
CustomExpression.MakeCompare(ExpressionType.LessThanOrEqual, field, Expression.Constant(range.Max, range.Type)));
},
}.Visit(filter)));
}
/// <summary>
/// Moves to the next batch. Implemented as a state machine.
/// </summary>
/// <returns>
/// <c>true</c> if another batch is available, <c>false</c> otherwise.
/// </returns>
protected override async Task <IEnumerator <IAsyncEnumerable <TSource> > > OnNextBatchAsync()
{
switch (this.state)
{
case 0: // Initial, materialize the source, and return the first groupings.
this.materialized = await this.source.Policy.MaterializeAsync(this.source).ConfigureAwait(false);
this.enumerator = this.materialized.GetAsyncEnumerator();
return(this.EnumerateBatches());
case 1: // Continue, return the next groupings.
if (!await this.enumerator.NextBatchAsync().ConfigureAwait(false))
{
this.state = 2;
return(this.startOffset == this.currentOffset ? null : BatchesEnumerator <TSource> .EnumerateItem(new Batch <TSource>(this.materialized, this.startOffset, this.currentOffset - this.startOffset)));
}
return(this.EnumerateBatches());
case 2: // Done, no more batches available.
return(null);
case 3: // Disposed, throw error.
throw new ObjectDisposedException(this.GetType().ToString());
default: // Shouldn't happen.
throw new InvalidOperationException($"Invalid state: {this.state}.");
}
}
/// <summary>
/// Resets all fields to null, and sets the state to 'disposed'.
/// </summary>
/// <param name="disposing">
/// The disposing.
/// </param>
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
this.state = 3;
this.source = null;
this.policy = null;
this.materialized = null;
this.enumerator = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="BatchesEnumerator{TSource}"/> class.
/// </summary>
/// <param name="source">
/// The source.
/// </param>
/// <param name="batchSize">
/// The batch size.
/// </param>
public BatchesEnumerator(IAsyncEnumerable <TSource> source, long batchSize)
{
this.source = source;
this.batchSize = batchSize;
this.materialized = source as IAsyncReadOnlyCollection <TSource>;
if (this.materialized != null)
{
this.enumerator = this.materialized.GetAsyncEnumerator();
this.IsSynchronous = this.enumerator.IsSynchronous;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="CrossJoinEnumerator{TLeft,TRight,TResult}"/> class.
/// </summary>
/// <param name="left">
/// The left part of the union.
/// </param>
/// <param name="right">
/// The right part of the union.
/// </param>
/// <param name="resultSelector">
/// The result Selector.
/// </param>
public CrossJoinEnumerator([NotNull] IAsyncEnumerable <TLeft> left, IAsyncEnumerable <TRight> right, Func <TLeft, TRight, TResult> resultSelector)
{
this.resultSelector = resultSelector;
this.leftEnumerator = left.GetAsyncEnumerator();
this.right = right;
this.materializedRight = this.right as IAsyncReadOnlyCollection <TRight>;
if (this.materializedRight != null)
{
this.rightEnumerator = this.materializedRight.GetAsyncEnumerator();
this.IsSynchronous = this.leftEnumerator.IsSynchronous && this.rightEnumerator.IsSynchronous;
}
}
/// <summary>
/// Resets all fields to null, and sets the state to 'disposed'.
/// </summary>
/// <param name="disposing">
/// The disposing.
/// </param>
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
this.state = 3;
this.enumerator?.Dispose();
this.source = null;
this.keySelector = null;
this.comparer = null;
this.sorted = null;
this.enumerator = null;
this.lastKey = default(TKey);
}
/// <summary>
/// Disposes the <see cref="IAsyncEnumerator{T}"/>.
/// </summary>
/// <param name="disposing">
/// The disposing.
/// </param>
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
this.state = 3;
this.leftEnumerator?.Dispose();
this.rightEnumerator?.Dispose();
this.resultSelector = null;
this.leftEnumerator = null;
this.rightEnumerator = null;
this.materializedRight = null;
this.right = null;
}
/// <summary>
/// Gets called when the next batch is needed.
/// </summary>
/// <returns>
/// A task returning an <see cref="IEnumerator{T}"/> containing the next batch, of <c>null</c> when all data is
/// enumerated.
/// </returns>
protected override async Task <IEnumerator <TResult> > OnNextBatchAsync()
{
switch (this.state)
{
case 0:
Func <Task> setLeft =
async() => this.leftEnumerator = (await this.left.SortAsync((item1, item2) => this.keyComparison(this.leftKey(item1), this.leftKey(item2))).ConfigureAwait(false)).GetAsyncEnumerator();
Func <Task> setRight =
async() => this.rightEnumerator = (this.materializedRight = await this.right.SortAsync((item1, item2) => this.keyComparison(this.rightKey(item1), this.rightKey(item2))).ConfigureAwait(false)).GetAsyncEnumerator();
await Task.WhenAll(setLeft(), setRight()).ConfigureAwait(false);
return(this.EnumerateItems());
case 1: // Next batch for the left side.
if (!await this.leftEnumerator.NextBatchAsync().ConfigureAwait(false))
{
this.state = 3;
return(null);
}
return(this.EnumerateItems());
case 2: // Next batch for the right side.
if (!await this.rightEnumerator.NextBatchAsync().ConfigureAwait(false))
{
if (this.isLeftJoin && this.itemsReturned == 0)
{
return(JoinEnumerator <TLeft, TRight, TKey, TResult> .EnumerateItem(this.resultSelector(this.leftEnumerator.Current, default(TRight))));
}
this.ResetRight();
}
return(this.EnumerateItems());
case 3: // Done.
return(null);
case 4: // Disposed.
throw new ObjectDisposedException(this.GetType().ToString());
default:
throw new InvalidOperationException($"Invalid state: {this.state}.");
}
}
/// <summary>
/// Gets the rows for the join.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="multiPartQuery">
/// The multi part query.
/// </param>
/// <returns>
/// The <see cref="IAsyncEnumerable{Row}"/>.
/// </returns>
internal override IAsyncEnumerable <Row> GetRows(IInternalExecutionContext context, [NotNull] IMultiPartQuery multiPartQuery)
{
var rowBuilder = new RowBuilder();
//// Build the left part by filtering by parts that contain the fields of the left side.
var leftQuery = new MultiPartQuery
{
Fields = multiPartQuery.Fields.Where(f => this.left.Aliases.Contains(f.SourceAlias)).Union(this.extraFields),
FilterExpression = multiPartQuery.FilterExpression.FilterByAliases(this.left.Aliases),
WildcardAliases = multiPartQuery.WildcardAliases.Intersect(this.left.Aliases),
};
//// Create the enumerable.
return(context.CreateAsyncEnumerable(
async() =>
{
//// Retrieve the records from the left side.
var leftData = await this.left.GetRows(context, leftQuery).MaterializeAsync().ConfigureAwait(false);
var rightQuery = new MultiPartQuery
{
Fields = multiPartQuery.Fields.Where(f => this.right.Aliases.Contains(f.SourceAlias)),
FilterExpression = ApplyBase.RangesToJoinFilter(await this.FindRangesAsync(context, multiPartQuery.FilterExpression, leftData)),
WildcardAliases = multiPartQuery.WildcardAliases.Intersect(this.right.Aliases),
};
IAsyncReadOnlyCollection <Row> rightData = null;
if (this.RightFactory == null)
{
rightData = await this.right.GetRows(context, rightQuery).MaterializeAsync().ConfigureAwait(false);
}
var collection = this.CombineResults(context, leftData, rightData, rightQuery, rowBuilder);
collection = await collection.MaterializeAsync().ConfigureAwait(false);
return collection;
})
.Where(multiPartQuery.FilterExpression.GetRowFilter())
.OrderBy(multiPartQuery.OrderByExpressions)
.AfterLastElement(count => context.Logger.Verbose($"{this.GetType().Name} returned {count} records.")));
}
/// <summary>
/// Disposes the <see cref="IAsyncEnumerator{T}"/>.
/// </summary>
/// <param name="disposing">
/// The disposing.
/// </param>
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
this.state = 4;
this.leftEnumerator?.Dispose();
this.rightEnumerator?.Dispose();
this.left = null;
this.right = null;
this.leftKey = null;
this.rightKey = null;
this.resultSelector = null;
this.keyComparison = null;
this.leftEnumerator = null;
this.rightEnumerator = null;
this.materializedRight = null;
this.resultFilter = null;
}
/// <summary>
/// Gets called when the next batch is needed.
/// </summary>
/// <returns>
/// A task returning an <see cref="IEnumerator{T}"/> containing the next batch, of <c>null</c> when all data is
/// enumerated.
/// </returns>
protected override async Task <IEnumerator <TResult> > OnNextBatchAsync()
{
switch (this.state)
{
case 0: // Right side was not materialized, materialize it and start enumeration.
this.materializedRight = await this.right.MaterializeAsync().ConfigureAwait(false);
this.rightEnumerator = this.materializedRight.GetAsyncEnumerator();
return(this.EnumerateItems());
case 1: // Next batch for the left side.
if (await this.leftEnumerator.NextBatchAsync().ConfigureAwait(false))
{
return(this.EnumerateItems());
}
this.state = 3;
return(null);
case 2: // Next batch for the right side.
if (!await this.rightEnumerator.NextBatchAsync().ConfigureAwait(false))
{
this.rightEnumerator.Dispose();
this.rightEnumerator = this.materializedRight.GetAsyncEnumerator();
this.stillEnumerating = false;
}
return(this.EnumerateItems());
case 3: // Done.
return(null);
case 4: // Disposed.
throw new ObjectDisposedException(this.GetType().ToString());
default:
throw new InvalidOperationException($"Invalid state: {this.state}.");
}
}
/// <summary>
/// Moves to the next batch. Implemented as a state machine.
/// </summary>
/// <returns>
/// <c>true</c> if another batch is available, <c>false</c> otherwise.
/// </returns>
protected override async Task <IEnumerator <IAsyncEnumerable <TSource> > > OnNextBatchAsync()
{
switch (this.state)
{
case 0: // Initial, sort the source, and return the first batches.
Comparison <TSource> comparison = (x, y) => this.comparer.Compare(this.valueSelector(x), this.valueSelector(y));
this.materialized = await this.policy.SortAsync(this.source, comparison).ConfigureAwait(false);
this.enumerator = this.materialized.GetAsyncEnumerator();
// Enumerate batches, and return to state 1.
this.state = 1;
return(this.EnumerateBatches());
case 1: // Continue, return the next batches.
if (!await this.enumerator.NextBatchAsync().ConfigureAwait(false))
{ // We're done, check if there still is a batch left.
this.state = 2;
var count = this.offset % this.batchSize;
return(count == 0 ? null : ValueBatchesEnumerator <TSource, TValue> .EnumerateItem(new Batch <TSource>(this.materialized, this.offset - count, count)));
}
return(this.EnumerateBatches());
case 2: // Done, no more groupings available.
return(null);
case 3: // Disposed, throw error.
throw new ObjectDisposedException(this.GetType().ToString());
default: // Shouldn't happen.
throw new InvalidOperationException($"Invalid state: {this.state}.");
}
}
/// <summary>
/// Combines the results of the left and right parts into the query result.
/// </summary>
/// <param name="joinsParts">
/// An array of array of compare expressions.
/// </param>
/// <param name="rowBuilder">
/// The row builder.
/// </param>
/// <param name="leftData">
/// The left data.
/// </param>
/// <param name="rightData">
/// The right data.
/// </param>
/// <returns>
/// The <see cref="IAsyncEnumerable{Row}"/>.
/// </returns>
protected override IAsyncEnumerable <Row> CombineResults([NotNull] CompareExpression[][] joinsParts, RowBuilder rowBuilder, IAsyncReadOnlyCollection <Row> leftData, IAsyncReadOnlyCollection <Row> rightData)
{
return(joinsParts
.Select(joinPart =>
leftData.Join(
rightData,
joinPart[0].Left.GetRowExpression <Row>(),
joinPart[0].CompareType,
joinPart[0].Right.GetRowExpression <Row>(),
joinPart.Skip(1).DefaultIfEmpty().Aggregate <Expression>(Expression.AndAlso).GetJoinFunction(this.Left),
rowBuilder.CombineRows,
joinPart[0].Comparer))
.Aggregate((result, joinResult) => result.Union(joinResult, RowIdComparer.Default)));
}
/// <summary>
/// Finds the ranges in an expression using the already retrieved rows.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="expression">
/// The expression.
/// </param>
/// <param name="rows">
/// The rows.
/// </param>
/// <returns>
/// A <see cref="Task"/> returning the <see cref="Expression"/> containing ranges.
/// </returns>
private async Task <Expression> FindRangesAsync(IExecutionContext context, Expression expression, IAsyncReadOnlyCollection <Row> rows)
{
var ranges = await expression.SplitByOrExpressions().ToRangedExpressionAsync(rows, this.Right.Aliases).ConfigureAwait(false);
return(ranges
.Select(r => r.SimplifyExpression(context))
.Where(r => !object.Equals((r as ConstantExpression)?.Value, false))
.DefaultIfEmpty().Aggregate(Expression.OrElse).SimplifyRanges());
}
/// <summary>
/// Combines the results of the left and right parts into the query result.
/// </summary>
/// <param name="joinsParts">
/// An array of array of compare expressions.
/// </param>
/// <param name="rowBuilder">
/// The row builder.
/// </param>
/// <param name="leftData">
/// The left data.
/// </param>
/// <param name="rightData">
/// The right data.
/// </param>
/// <returns>
/// The <see cref="IAsyncEnumerable{Row}"/>.
/// </returns>
protected abstract IAsyncEnumerable <Row> CombineResults(CompareExpression[][] joinsParts, RowBuilder rowBuilder, IAsyncReadOnlyCollection <Row> leftData, IAsyncReadOnlyCollection <Row> rightData);
/// <summary>
/// Initializes a new instance of the <see cref="Batch{T}"/> class.
/// </summary>
/// <param name="materialized">
/// The materialized.
/// </param>
/// <param name="start">
/// The start.
/// </param>
/// <param name="count">
/// The count.
/// </param>
public Batch(IAsyncReadOnlyCollection <T> materialized, long start, long count)
{
this.materialized = materialized;
this.start = start;
this.Count = count;
}
/// <summary>
/// Combines the left and right result sets.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="leftData">
/// The left result set.
/// </param>
/// <param name="rightData">
/// The right result set.
/// </param>
/// <param name="rightQuery">
/// The query for the right side.
/// </param>
/// <param name="rowBuilder">
/// The row builder.
/// </param>
/// <returns>
/// The <see cref="IAsyncEnumerable{Row}"/>.
/// </returns>
protected override IAsyncEnumerable <Row> CombineResults(IInternalExecutionContext context, IAsyncReadOnlyCollection <Row> leftData, IAsyncReadOnlyCollection <Row> rightData, MultiPartQuery rightQuery, [NotNull] RowBuilder rowBuilder)
{
return(this.RightFactory != null
? leftData.CrossApply(row => this.RightFactory(context, row).GetRows(context, rightQuery), rowBuilder.CombineRows)
: leftData.CrossApply(row => rightData, rowBuilder.CombineRows));
}
/// <summary>
/// Combines the left and right result sets.
/// </summary>
/// <param name="context">
/// The context.
/// </param>
/// <param name="leftData">
/// The left result set.
/// </param>
/// <param name="rightData">
/// The right result set.
/// </param>
/// <param name="rightQuery">
/// The query for the right side.
/// </param>
/// <param name="rowBuilder">
/// The row builder.
/// </param>
/// <returns>
/// The <see cref="IAsyncEnumerable{Row}"/>.
/// </returns>
protected abstract IAsyncEnumerable <Row> CombineResults(IInternalExecutionContext context, IAsyncReadOnlyCollection <Row> leftData, IAsyncReadOnlyCollection <Row> rightData, MultiPartQuery rightQuery, RowBuilder rowBuilder);
/// <summary>
/// Initializes a new instance of the <see cref="MaterializedAsyncEnumerableVisualizer{T}"/> class.
/// </summary>
/// <param name="readOnlyCollection">
/// The enumerable.
/// </param>
public MaterializedAsyncEnumerableVisualizer([NotNull] IAsyncReadOnlyCollection <T> readOnlyCollection)
: base(readOnlyCollection)
{
this.Count = readOnlyCollection.Count;
this.Policy = readOnlyCollection.Policy;
}
/// <summary>
/// Initializes a new instance of the <see cref="SourceKeyAdapter"/> class.
/// </summary>
/// <param name="inner">
/// The inner collection.
/// </param>
public SourceKeyAdapter(IAsyncReadOnlyCollection <SourceKey <TSource, TKey> > inner)
{
this.inner = inner;
}
/// <summary>
/// Initializes a new instance of the <see cref="AsyncGrouping{TSource,TKey}"/> class.
/// </summary>
/// <param name="key">
/// The key.
/// </param>
/// <param name="items">
/// The inner.
/// </param>
/// <param name="start">
/// The offset.
/// </param>
/// <param name="count">
/// The number of inner.
/// </param>
public AsyncGrouping(TKey key, IAsyncReadOnlyCollection <SourceKey <TSource, TKey> > items, long start, long count)
: base(new SourceKeyAdapter(items), start, count)
{
this.Key = key;
}