public static void Where_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).Where(x => x));
Assert.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).Where((x, index) => x));
Assert.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().Where((Func <bool, bool>)null));
Assert.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().Where((Func <bool, int, bool>)null));
}
public static void Select_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Select(x => x));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Select((x, index) => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().Select((Func <bool, bool>)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().Select((Func <bool, int, bool>)null));
}
public static void Last_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Last());
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).LastOrDefault());
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().Last(null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().LastOrDefault(null));
}
public static void Single_ArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).Single());
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SingleOrDefault());
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <int>().Single(null));
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <int>().SingleOrDefault(null));
}
public static void First_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).First());
Assert.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).FirstOrDefault());
Assert.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <int>().First(null));
Assert.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <int>().FirstOrDefault(null));
}
public static void Aggregate_InvalidOperationException()
{
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Aggregate((i, j) => i));
// All other invocations return the seed value.
Assert.Equal(-1, ParallelEnumerable.Empty <int>().Aggregate(-1, (i, j) => i + j));
Assert.Equal(-1, ParallelEnumerable.Empty <int>().Aggregate(-1, (i, j) => i + j, i => i));
Assert.Equal(-1, ParallelEnumerable.Empty <int>().Aggregate(-1, (i, j) => i + j, (i, j) => i + j, i => i));
Assert.Equal(-1, ParallelEnumerable.Empty <int>().Aggregate(() => - 1, (i, j) => i + j, (i, j) => i + j, i => i));
}
public static void CountLongCount_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Count());
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Count(x => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().Count(null));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).LongCount());
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).LongCount(x => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().LongCount(null));
}
public static void CountLongCount_ArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).Count());
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).Count(x => x));
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().Count(null));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).LongCount());
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).LongCount(x => x));
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().LongCount(null));
}
public static IEnumerable <object[]> EmptyData()
{
foreach (object[] query in UnorderedSources.Ranges(new[] { 0 }))
{
yield return(new object[] { query[0], 1 });
}
yield return(new object[] { Labeled.Label("Empty-Int", ParallelEnumerable.Empty <int>()), 1 });
yield return(new object[] { Labeled.Label("Empty-Decimal", ParallelEnumerable.Empty <decimal>()), 1.5M });
yield return(new object[] { Labeled.Label("Empty-String", ParallelEnumerable.Empty <string>()), "default" });
}
public static void ToDictionary_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <int>)null).ToDictionary(x => x));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <int>)null).ToDictionary(x => x, EqualityComparer <int> .Default));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <int>)null).ToDictionary(x => x, y => y));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <int>)null).ToDictionary(x => x, y => y, EqualityComparer <int> .Default));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary((Func <int, int>)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary((Func <int, int>)null, EqualityComparer <int> .Default));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary((Func <int, int>)null, y => y));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary((Func <int, int>)null, y => y, EqualityComparer <int> .Default));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary(x => x, (Func <int, int>)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <int>().ToDictionary(x => x, (Func <int, int>)null, EqualityComparer <int> .Default));
}
static void PLinqEmpty()
{
Console.WriteLine("=== " + MethodInfo.GetCurrentMethod().Name + " ===");
var parallel =
from p in ParallelEnumerable.Empty <int>()
select new { Value = p, Thread.CurrentThread.ManagedThreadId };
foreach (var p in parallel)
{
Console.WriteLine("Number = {0}, ThreadId = {1}", p.Value, p.ManagedThreadId);
}
}
private static void Empty <T>()
{
Assert.Empty(ParallelEnumerable.Empty <T>());
Assert.False(ParallelEnumerable.Empty <T>().Any(x => true));
Assert.False(ParallelEnumerable.Empty <T>().Contains(default(T)));
Assert.Equal(0, ParallelEnumerable.Empty <T>().Count());
Assert.Equal(0, ParallelEnumerable.Empty <T>().LongCount());
Assert.Equal(new T[0], ParallelEnumerable.Empty <T>().ToArray());
Assert.Equal(new Dictionary <T, T>(), ParallelEnumerable.Empty <T>().ToDictionary(x => x));
Assert.Equal(new List <T>(), ParallelEnumerable.Empty <T>().ToList());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <T>().First());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <T>().Last());
}
public static void ToLookup_ArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <int>)null).ToLookup(x => x));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <int>)null).ToLookup(x => x, EqualityComparer <int> .Default));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <int>)null).ToLookup(x => x, y => y));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <int>)null).ToLookup(x => x, y => y, EqualityComparer <int> .Default));
AssertExtensions.Throws <ArgumentNullException>("keySelector", () => ParallelEnumerable.Empty <int>().ToLookup((Func <int, int>)null));
AssertExtensions.Throws <ArgumentNullException>("keySelector", () => ParallelEnumerable.Empty <int>().ToLookup((Func <int, int>)null, EqualityComparer <int> .Default));
AssertExtensions.Throws <ArgumentNullException>("keySelector", () => ParallelEnumerable.Empty <int>().ToLookup((Func <int, int>)null, y => y));
AssertExtensions.Throws <ArgumentNullException>("keySelector", () => ParallelEnumerable.Empty <int>().ToLookup((Func <int, int>)null, y => y, EqualityComparer <int> .Default));
AssertExtensions.Throws <ArgumentNullException>("elementSelector", () => ParallelEnumerable.Empty <int>().ToLookup(x => x, (Func <int, int>)null));
AssertExtensions.Throws <ArgumentNullException>("elementSelector", () => ParallelEnumerable.Empty <int>().ToLookup(x => x, (Func <int, int>)null, EqualityComparer <int> .Default));
}
private Pair <IEnumerable <TElement>, TOrderKey> GetValueList(THashKey key)
{
TBaseElement baseValue = default(TBaseElement) !;
if (_base.TryGetValue(key, ref baseValue !))
{
return(CreateValuePair(baseValue));
}
else
{
return(new Pair <IEnumerable <TElement>, TOrderKey>(ParallelEnumerable.Empty <TElement>(), EmptyValueKey));
}
}
public static void SelectMany_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).SelectMany(x => new[] { x }));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).SelectMany((x, index) => new[] { x }));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, IEnumerable <bool> >)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, int, IEnumerable <bool> >)null));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).SelectMany(x => new[] { x }, (x, y) => x));
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).SelectMany((x, index) => new[] { x }, (x, y) => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, IEnumerable <bool> >)null, (x, y) => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, int, IEnumerable <bool> >)null, (x, y) => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany(x => new[] { x }, (Func <bool, bool, bool>)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().SelectMany((x, index) => new[] { x }, (Func <bool, bool, bool>)null));
}
public static void SelectMany_ArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SelectMany(x => new[] { x }));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SelectMany((x, index) => new[] { x }));
AssertExtensions.Throws <ArgumentNullException>("selector", () => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, IEnumerable <bool> >)null));
AssertExtensions.Throws <ArgumentNullException>("selector", () => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, int, IEnumerable <bool> >)null));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SelectMany(x => new[] { x }, (x, y) => x));
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SelectMany((x, index) => new[] { x }, (x, y) => x));
AssertExtensions.Throws <ArgumentNullException>("collectionSelector", () => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, IEnumerable <bool> >)null, (x, y) => x));
AssertExtensions.Throws <ArgumentNullException>("collectionSelector", () => ParallelEnumerable.Empty <bool>().SelectMany((Func <bool, int, IEnumerable <bool> >)null, (x, y) => x));
AssertExtensions.Throws <ArgumentNullException>("resultSelector", () => ParallelEnumerable.Empty <bool>().SelectMany(x => new[] { x }, (Func <bool, bool, bool>)null));
AssertExtensions.Throws <ArgumentNullException>("resultSelector", () => ParallelEnumerable.Empty <bool>().SelectMany((x, index) => new[] { x }, (Func <bool, bool, bool>)null));
}
public static void Max_InvalidOperationException()
{
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <long>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <float>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <double>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <decimal>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <NotComparable>().Max());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => (int)x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => (long)x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => (float)x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => (double)x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => (decimal)x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Max(x => new NotComparable(x)));
}
public static void Max_EmptyNullable()
{
Assert.Null(ParallelEnumerable.Empty <int?>().Max());
Assert.Null(ParallelEnumerable.Empty <long?>().Max());
Assert.Null(ParallelEnumerable.Empty <float?>().Max());
Assert.Null(ParallelEnumerable.Empty <double?>().Max());
Assert.Null(ParallelEnumerable.Empty <decimal?>().Max());
Assert.Null(ParallelEnumerable.Empty <object>().Max());
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => (int?)x));
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => (long?)x));
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => (float?)x));
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => (double?)x));
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => (decimal?)x));
Assert.Null(ParallelEnumerable.Empty <int>().Max(x => new object()));
}
public static void Min_InvalidOperationException()
{
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Min());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Min(x => x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <long>().Min());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <long>().Min(x => x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <float>().Min());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <float>().Min(x => x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <double>().Min());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <double>().Min(x => x));
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <decimal>().Min());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <decimal>().Min(x => x));
// Nullables return null when empty
Assert.Null(ParallelEnumerable.Empty <int?>().Min());
Assert.Null(ParallelEnumerable.Empty <int?>().Min(x => x));
Assert.Null(ParallelEnumerable.Empty <long?>().Min());
Assert.Null(ParallelEnumerable.Empty <long?>().Min(x => x));
Assert.Null(ParallelEnumerable.Empty <float?>().Min());
Assert.Null(ParallelEnumerable.Empty <float?>().Min(x => x));
Assert.Null(ParallelEnumerable.Empty <double?>().Min());
Assert.Null(ParallelEnumerable.Empty <double?>().Min(x => x));
Assert.Null(ParallelEnumerable.Empty <decimal?>().Min());
Assert.Null(ParallelEnumerable.Empty <decimal?>().Min(x => x));
}
public static void All_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).All(x => x));
Assert.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().All(null));
}
public static void Single_Empty()
{
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Single());
Assert.Throws <InvalidOperationException>(() => ParallelEnumerable.Empty <int>().Single(x => true));
}
internal override bool MoveNext(ref TOutput currentElement, ref TLeftKey currentKey)
{
Mutables <TLeftInput, TLeftKey, TRightInput, THashKey, TOutput> mutables = this.m_mutables;
if (mutables == null)
{
mutables = this.m_mutables = new Mutables <TLeftInput, TLeftKey, TRightInput, THashKey, TOutput>();
mutables.m_rightHashLookup = new HashLookup <THashKey, Pair <TRightInput, ListChunk <TRightInput> > >(this.m_keyComparer);
Pair <TRightInput, THashKey> pair = new Pair <TRightInput, THashKey>();
int num = 0;
int num2 = 0;
while (this.m_rightSource.MoveNext(ref pair, ref num))
{
if ((num2++ & 0x3f) == 0)
{
CancellationState.ThrowIfCanceled(this.m_cancellationToken);
}
TRightInput first = pair.First;
THashKey second = pair.Second;
if (second != null)
{
Pair <TRightInput, ListChunk <TRightInput> > pair2 = new Pair <TRightInput, ListChunk <TRightInput> >();
if (!mutables.m_rightHashLookup.TryGetValue(second, ref pair2))
{
pair2 = new Pair <TRightInput, ListChunk <TRightInput> >(first, null);
if (this.m_groupResultSelector != null)
{
pair2.Second = new ListChunk <TRightInput>(2);
pair2.Second.Add(first);
}
mutables.m_rightHashLookup.Add(second, pair2);
}
else
{
if (pair2.Second == null)
{
pair2.Second = new ListChunk <TRightInput>(2);
mutables.m_rightHashLookup[second] = pair2;
}
pair2.Second.Add(first);
}
}
}
}
ListChunk <TRightInput> currentRightMatches = mutables.m_currentRightMatches;
if ((currentRightMatches != null) && (mutables.m_currentRightMatchesIndex == currentRightMatches.Count))
{
currentRightMatches = mutables.m_currentRightMatches = currentRightMatches.Next;
mutables.m_currentRightMatchesIndex = 0;
}
if (mutables.m_currentRightMatches == null)
{
Pair <TLeftInput, THashKey> pair3 = new Pair <TLeftInput, THashKey>();
TLeftKey local3 = default(TLeftKey);
while (this.m_leftSource.MoveNext(ref pair3, ref local3))
{
if ((mutables.m_outputLoopCount++ & 0x3f) == 0)
{
CancellationState.ThrowIfCanceled(this.m_cancellationToken);
}
Pair <TRightInput, ListChunk <TRightInput> > pair4 = new Pair <TRightInput, ListChunk <TRightInput> >();
TLeftInput local4 = pair3.First;
THashKey key = pair3.Second;
if (((key != null) && mutables.m_rightHashLookup.TryGetValue(key, ref pair4)) && (this.m_singleResultSelector != null))
{
mutables.m_currentRightMatches = pair4.Second;
mutables.m_currentRightMatchesIndex = 0;
currentElement = this.m_singleResultSelector(local4, pair4.First);
currentKey = local3;
if (pair4.Second != null)
{
mutables.m_currentLeft = local4;
mutables.m_currentLeftKey = local3;
}
return(true);
}
if (this.m_groupResultSelector != null)
{
IEnumerable <TRightInput> enumerable = pair4.Second;
if (enumerable == null)
{
enumerable = (IEnumerable <TRightInput>)ParallelEnumerable.Empty <TRightInput>();
}
currentElement = this.m_groupResultSelector(local4, enumerable);
currentKey = local3;
return(true);
}
}
return(false);
}
currentElement = this.m_singleResultSelector(mutables.m_currentLeft, mutables.m_currentRightMatches.m_chunk[mutables.m_currentRightMatchesIndex]);
currentKey = mutables.m_currentLeftKey;
mutables.m_currentRightMatchesIndex++;
return(true);
}
//---------------------------------------------------------------------------------------
// MoveNext implements all the hash-join logic noted earlier. When it is called first, it
// will execute the entire inner query tree, and build a hash-table lookup. This is the
// Building phase. Then for the first call and all subsequent calls to MoveNext, we will
// incrementally perform the Probing phase. We'll keep getting elements from the outer
// data source, looking into the hash-table we built, and enumerating the full results.
//
// This routine supports both inner and outer (group) joins. An outer join will yield a
// (possibly empty) list of matching elements from the inner instead of one-at-a-time,
// as we do for inner joins.
//
internal override bool MoveNext(ref TOutput currentElement, ref TLeftKey currentKey)
{
Contract.Assert(_singleResultSelector != null || _groupResultSelector != null, "expected a compiled result selector");
Contract.Assert(_leftSource != null);
Contract.Assert(_rightSource != null);
// BUILD phase: If we haven't built the hash-table yet, create that first.
Mutables mutables = _mutables;
if (mutables == null)
{
mutables = _mutables = new Mutables();
#if DEBUG
int hashLookupCount = 0;
int hashKeyCollisions = 0;
#endif
mutables._rightHashLookup = new HashLookup <THashKey, Pair>(_keyComparer);
Pair rightPair = new Pair(default(TRightInput), default(THashKey));
int rightKeyUnused = default(int);
int i = 0;
while (_rightSource.MoveNext(ref rightPair, ref rightKeyUnused))
{
if ((i++ & CancellationState.POLL_INTERVAL) == 0)
{
CancellationState.ThrowIfCanceled(_cancellationToken);
}
TRightInput rightElement = (TRightInput)rightPair.First;
THashKey rightHashKey = (THashKey)rightPair.Second;
// We ignore null keys.
if (rightHashKey != null)
{
#if DEBUG
hashLookupCount++;
#endif
// See if we've already stored an element under the current key. If not, we
// lazily allocate a pair to hold the elements mapping to the same key.
const int INITIAL_CHUNK_SIZE = 2;
Pair currentValue = new Pair(default(TRightInput), default(ListChunk <TRightInput>));
if (!mutables._rightHashLookup.TryGetValue(rightHashKey, ref currentValue))
{
currentValue = new Pair(rightElement, null);
if (_groupResultSelector != null)
{
// For group joins, we also add the element to the list. This makes
// it easier later to yield the list as-is.
currentValue.Second = new ListChunk <TRightInput>(INITIAL_CHUNK_SIZE);
((ListChunk <TRightInput>)currentValue.Second).Add((TRightInput)rightElement);
}
mutables._rightHashLookup.Add(rightHashKey, currentValue);
}
else
{
if (currentValue.Second == null)
{
// Lazily allocate a list to hold all but the 1st value. We need to
// re-store this element because the pair is a value type.
currentValue.Second = new ListChunk <TRightInput>(INITIAL_CHUNK_SIZE);
mutables._rightHashLookup[rightHashKey] = currentValue;
}
((ListChunk <TRightInput>)currentValue.Second).Add((TRightInput)rightElement);
#if DEBUG
hashKeyCollisions++;
#endif
}
}
}
#if DEBUG
TraceHelpers.TraceInfo("ParallelJoinQueryOperator::MoveNext - built hash table [count = {0}, collisions = {1}]",
hashLookupCount, hashKeyCollisions);
#endif
}
// PROBE phase: So long as the source has a next element, return the match.
ListChunk <TRightInput> currentRightChunk = mutables._currentRightMatches;
if (currentRightChunk != null && mutables._currentRightMatchesIndex == currentRightChunk.Count)
{
currentRightChunk = mutables._currentRightMatches = currentRightChunk.Next;
mutables._currentRightMatchesIndex = 0;
}
if (mutables._currentRightMatches == null)
{
// We have to look up the next list of matches in the hash-table.
Pair leftPair = new Pair(default(TLeftInput), default(THashKey));
TLeftKey leftKey = default(TLeftKey);
while (_leftSource.MoveNext(ref leftPair, ref leftKey))
{
if ((mutables._outputLoopCount++ & CancellationState.POLL_INTERVAL) == 0)
{
CancellationState.ThrowIfCanceled(_cancellationToken);
}
// Find the match in the hash table.
Pair matchValue = new Pair(default(TRightInput), default(ListChunk <TRightInput>));
TLeftInput leftElement = (TLeftInput)leftPair.First;
THashKey leftHashKey = (THashKey)leftPair.Second;
// Ignore null keys.
if (leftHashKey != null)
{
if (mutables._rightHashLookup.TryGetValue(leftHashKey, ref matchValue))
{
// We found a new match. For inner joins, we remember the list in case
// there are multiple value under this same key -- the next iteration will pick
// them up. For outer joins, we will use the list momentarily.
if (_singleResultSelector != null)
{
mutables._currentRightMatches = (ListChunk <TRightInput>)matchValue.Second;
Contract.Assert(mutables._currentRightMatches == null || mutables._currentRightMatches.Count > 0,
"we were expecting that the list would be either null or empty");
mutables._currentRightMatchesIndex = 0;
// Yield the value.
currentElement = _singleResultSelector(leftElement, (TRightInput)matchValue.First);
currentKey = leftKey;
// If there is a list of matches, remember the left values for next time.
if (matchValue.Second != null)
{
mutables._currentLeft = leftElement;
mutables._currentLeftKey = leftKey;
}
return(true);
}
}
}
// For outer joins, we always yield a result.
if (_groupResultSelector != null)
{
// Grab the matches, or create an empty list if there are none.
IEnumerable <TRightInput> matches = (ListChunk <TRightInput>)matchValue.Second;
if (matches == null)
{
matches = ParallelEnumerable.Empty <TRightInput>();
}
// Generate the current value.
currentElement = _groupResultSelector(leftElement, matches);
currentKey = leftKey;
return(true);
}
}
// If we've reached the end of the data source, we're done.
return(false);
}
// Produce the next element and increment our index within the matches.
Contract.Assert(_singleResultSelector != null);
Contract.Assert(mutables._currentRightMatches != null);
Contract.Assert(0 <= mutables._currentRightMatchesIndex && mutables._currentRightMatchesIndex < mutables._currentRightMatches.Count);
currentElement = _singleResultSelector(
mutables._currentLeft, mutables._currentRightMatches._chunk[mutables._currentRightMatchesIndex]);
currentKey = mutables._currentLeftKey;
mutables._currentRightMatchesIndex++;
return(true);
}
public static void Any_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).Any(x => x));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().Any(null));
}
public static void TakeWhile_ArgumentNullException()
{
Assert.Throws <ArgumentNullException>(() => ((ParallelQuery <bool>)null).TakeWhile(x => true));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().TakeWhile((Func <bool, bool>)null));
Assert.Throws <ArgumentNullException>(() => ParallelEnumerable.Empty <bool>().TakeWhile((Func <bool, int, bool>)null));
}
public static void SkipWhile_ArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("source", () => ((ParallelQuery <bool>)null).SkipWhile(x => true));
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().SkipWhile((Func <bool, bool>)null));
AssertExtensions.Throws <ArgumentNullException>("predicate", () => ParallelEnumerable.Empty <bool>().SkipWhile((Func <bool, int, bool>)null));
}
