/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">The pre-sorted rows.</param>
/// <returns></returns>
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
ObjectArrayKeys previousKey = null;
var aggregate = new Row();
var groupBy = GetColumnsToGroupBy();
foreach (var row in rows)
{
var key = row.CreateKey(groupBy);
if (previousKey != null && !previousKey.Equals(key))
{
FinishAggregation(aggregate);
yield return(aggregate);
aggregate = new Row();
}
Accumulate(row, aggregate);
previousKey = key;
}
FinishAggregation(aggregate);
yield return(aggregate);
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">The pre-sorted rows.</param>
/// <param name="cancellationToken">A CancellationToken to stop execution</param>
/// <returns></returns>
public override IAsyncEnumerable <Row> Execute(IAsyncEnumerable <Row> rows, CancellationToken cancellationToken = default)
{
return(new AsyncEnumerable <Row>(async yield => {
ObjectArrayKeys previousKey = null;
var aggregate = new Row();
var groupBy = GetColumnsToGroupBy();
await rows.ForEachAsync(async row =>
{
var key = row.CreateKey(groupBy);
if (previousKey != null && !previousKey.Equals(key))
{
FinishAggregation(aggregate);
await yield.ReturnAsync(aggregate);
aggregate = new Row();
}
Accumulate(row, aggregate);
previousKey = key;
}, cancellationToken);
FinishAggregation(aggregate);
await yield.ReturnAsync(aggregate);
}));
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">Rows in pipeline. These are only used if a left part of the join was not specified.</param>
/// <param name="cancellationToken">A CancellationToken to stop execution</param>
/// <returns></returns>
public override IAsyncEnumerable <Row> Execute(IAsyncEnumerable <Row> rows, CancellationToken cancellationToken = default)
{
return(new AsyncEnumerable <Row>(async yield => {
PrepareForJoin();
SetupJoinConditions();
Guard.Against(leftColumns == null, "You must setup the left columns");
Guard.Against(rightColumns == null, "You must setup the right columns");
IAsyncEnumerable <Row> rightEnumerable = await GetRightEnumerable(cancellationToken);
IAsyncEnumerable <Row> execute = left.Execute(leftRegistered ? null : rows, cancellationToken);
await new EventRaisingEnumerator(left, execute)
.ForEachAsync(async leftRow =>
{
ObjectArrayKeys key = leftRow.CreateKey(leftColumns);
List <Row> rightRows;
if (this.rightRowsByJoinKey.TryGetValue(key, out rightRows))
{
foreach (Row rightRow in rightRows)
{
rightRowsWereMatched[rightRow] = null;
await yield.ReturnAsync(MergeRows(leftRow, rightRow));
}
}
else if ((jointype & JoinType.Left) != 0)
{
Row emptyRow = new Row();
await yield.ReturnAsync(MergeRows(leftRow, emptyRow));
}
else
{
LeftOrphanRow(leftRow);
}
}, cancellationToken);
await rightEnumerable.ForEachAsync(async rightRow =>
{
if (rightRowsWereMatched.ContainsKey(rightRow))
{
return;
}
Row emptyRow = new Row();
if ((jointype & JoinType.Right) != 0)
{
await yield.ReturnAsync(MergeRows(emptyRow, rightRow));
}
else
{
RightOrphanRow(rightRow);
}
}, cancellationToken);
}));
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">Rows in pipeline. These are only used if a left part of the join was not specified.</param>
/// <returns></returns>
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
PrepareForJoin();
SetupJoinConditions();
Guard.Against(leftColumns == null, "You must setup the left columns");
Guard.Against(rightColumns == null, "You must setup the right columns");
IEnumerable <Row> rightEnumerable = GetRightEnumerable();
IEnumerable <Row> execute = left.Execute(leftRegistered ? null : rows);
foreach (Row leftRow in new EventRaisingEnumerator(left, execute))
{
ObjectArrayKeys key = leftRow.CreateKey(leftColumns);
List <Row> rightRows;
if (this.rightRowsByJoinKey.TryGetValue(key, out rightRows))
{
foreach (Row rightRow in rightRows)
{
rightRowsWereMatched[rightRow] = null;
yield return(MergeRows(leftRow, rightRow));
}
}
else if ((jointype & JoinType.Left) != 0)
{
Row emptyRow = new Row();
yield return(MergeRows(leftRow, emptyRow));
}
else
{
LeftOrphanRow(leftRow);
}
}
foreach (Row rightRow in rightEnumerable)
{
if (rightRowsWereMatched.ContainsKey(rightRow))
{
continue;
}
Row emptyRow = new Row();
if ((jointype & JoinType.Right) != 0)
{
yield return(MergeRows(emptyRow, rightRow));
}
else
{
RightOrphanRow(rightRow);
}
}
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="ignored">Ignored rows</param>
/// <returns></returns>
public override IEnumerable <FdoRow> Execute(IEnumerable <FdoRow> ignored)
{
PrepareForJoin();
IEnumerable <FdoRow> rightEnumerable = GetRightEnumerable();
IEnumerable <FdoRow> execute = left.Execute(null);
foreach (FdoRow leftRow in new EventRaisingEnumerator(left, execute))
{
ObjectArrayKeys key = leftRow.CreateKey(leftColumns);
List <FdoRow> rightRows;
if (this.rightRowsByJoinKey.TryGetValue(key, out rightRows))
{
foreach (FdoRow rightRow in rightRows)
{
rightRowsWereMatched[rightRow] = null;
yield return(MergeRows(leftRow, rightRow));
}
}
else if ((jointype & JoinType.Left) != 0)
{
FdoRow emptyRow = new FdoRow();
yield return(MergeRows(leftRow, emptyRow));
}
else
{
LeftOrphanRow(leftRow);
}
}
foreach (FdoRow rightRow in rightEnumerable)
{
if (rightRowsWereMatched.ContainsKey(rightRow))
{
continue;
}
FdoRow emptyRow = new FdoRow();
if ((jointype & JoinType.Right) != 0)
{
yield return(MergeRows(emptyRow, rightRow));
}
else
{
RightOrphanRow(rightRow);
}
}
}
private IEnumerable <FdoRow> GetRightEnumerable()
{
IEnumerable <FdoRow> rightEnumerable = new CachingEnumerable <FdoRow>(
new EventRaisingEnumerator(right, right.Execute(null))
);
foreach (FdoRow row in rightEnumerable)
{
ObjectArrayKeys key = row.CreateKey(rightColumns);
List <FdoRow> rowsForKey;
if (this.rightRowsByJoinKey.TryGetValue(key, out rowsForKey) == false)
{
this.rightRowsByJoinKey[key] = rowsForKey = new List <FdoRow>();
}
rowsForKey.Add(row);
}
return(rightEnumerable);
}
private async Task <IAsyncEnumerable <Row> > GetRightEnumerable(CancellationToken cancellationToken = default)
{
IAsyncEnumerable <Row> rightEnumerable = new CachingEnumerable <Row>(new EventRaisingEnumerator(right, right.Execute(null, cancellationToken)),
cancellationToken);
await rightEnumerable.ForEachAsync(row =>
{
ObjectArrayKeys key = row.CreateKey(rightColumns);
List <Row> rowsForKey;
if (this.rightRowsByJoinKey.TryGetValue(key, out rowsForKey) == false)
{
this.rightRowsByJoinKey[key] = rowsForKey = new List <Row>();
}
rowsForKey.Add(row);
}, cancellationToken);
return(rightEnumerable);
}
/// <summary>
/// Determines whether the specified <see cref="T:System.Object"/> is equal to the current <see cref="T:System.Object"/>.
/// </summary>
/// <param name="obj">The <see cref="T:System.Object"/> to compare with the current <see cref="T:System.Object"/>.</param>
/// <returns>
/// true if the specified <see cref="T:System.Object"/> is equal to the current <see cref="T:System.Object"/>; otherwise, false.
/// </returns>
/// <exception cref="T:System.NullReferenceException">The <paramref name="obj"/> parameter is null.</exception>
public override bool Equals(object obj)
{
if (this == obj)
{
return(true);
}
ObjectArrayKeys other = obj as ObjectArrayKeys;
if (other == null || other.columnValues.Length != this.columnValues.Length)
{
return(false);
}
for (int i = 0; i < columnValues.Length; i++)
{
if (Equals(this.columnValues[i], other.columnValues[i]) == false)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">The rows.</param>
/// <returns></returns>
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
IDictionary <ObjectArrayKeys, Row> aggregations = new Dictionary <ObjectArrayKeys, Row>();
string[] groupBy = GetColumnsToGroupBy();
foreach (Row row in rows)
{
ObjectArrayKeys key = row.CreateKey(groupBy);
Row aggregate;
if (aggregations.TryGetValue(key, out aggregate) == false)
{
aggregations[key] = aggregate = new Row();
}
Accumulate(row, aggregate);
}
foreach (Row row in aggregations.Values)
{
FinishAggregation(row);
yield return(row);
}
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">The rows.</param>
/// <param name="cancellationToken">A CancellationToken to stop execution</param>
/// <returns></returns>
public override IAsyncEnumerable <Row> Execute(IAsyncEnumerable <Row> rows, CancellationToken cancellationToken = default)
{
return(new AsyncEnumerable <Row>(async yield => {
IDictionary <ObjectArrayKeys, Row> aggregations = new Dictionary <ObjectArrayKeys, Row>();
string[] groupBy = GetColumnsToGroupBy();
await rows.ForEachAsync(row =>
{
ObjectArrayKeys key = row.CreateKey(groupBy);
Row aggregate;
if (aggregations.TryGetValue(key, out aggregate) == false)
{
aggregations[key] = aggregate = new Row();
}
Accumulate(row, aggregate);
return Task.CompletedTask;
}, cancellationToken);
foreach (Row row in aggregations.Values)
{
FinishAggregation(row);
await yield.ReturnAsync(row);
}
}));
}
