bool System.Collections.IStructuralEquatable.Equals(object other, System.Collections.IEqualityComparer comparer)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
if (other == null)
{
return(false);
}
var linked = other as LinkedTuple <T>;
if (!object.ReferenceEquals(linked, null))
{
// must have same length
if (linked.Count != this.Count)
{
return(false);
}
// compare the tail before
if (!comparer.Equals(this.Tail, linked.Tail))
{
return(false);
}
// compare the rest
return(this.Head.Equals(linked.Tail, comparer));
}
return(STuple.Equals(this, other, comparer));
}
/// <summary>Return the Nth item in this tuple</summary>
public object this[int index]
{
get
{
switch (index)
{
case 0:
case -5: return(this.Item1);
case 1:
case -4: return(this.Item2);
case 2:
case -3: return(this.Item3);
case 3:
case -2: return(this.Item4);
case 4:
case -1: return(this.Item5);
default: STuple.FailIndexOutOfRange(index, 5); return(null);
}
}
}
int IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer comparer)
{
return(STuple.CombineHashCodes(
this.Head != null ? this.Head.GetHashCode(comparer) : 0,
comparer.GetHashCode(this.Tail)
));
}
int IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer comparer)
{
return(STuple.CombineHashCodes(
m_prefix.GetHashCode(),
comparer.GetHashCode(m_items)
));
}
public void PackKey(ref SliceWriter writer, ITuple items)
{
var tw = new TupleWriter(writer);
STuple.Pack(ref tw, items);
writer = tw.Output;
}
public object this[int index]
{
get
{
return(m_items[m_offset + STuple.MapIndex(index, m_count)]);
}
}
int System.Collections.IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer comparer)
{
return(STuple.CombineHashCodes(
comparer.GetHashCode(this.Item1),
comparer.GetHashCode(this.Item2)
));
}
bool IStructuralEquatable.Equals(object other, IEqualityComparer comparer)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
if (other == null)
{
return(false);
}
var sliced = other as SlicedTuple;
if (!object.ReferenceEquals(sliced, null))
{
if (sliced.m_count != m_count)
{
return(false);
}
// compare slices!
for (int i = 0; i < m_count; i++)
{
if (m_slices[i + m_offset] != sliced.m_slices[i + sliced.m_offset])
{
return(false);
}
}
return(false);
}
return(STuple.Equals(this, other, comparer));
}
bool IStructuralEquatable.Equals(object other, IEqualityComparer comparer)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
if (other == null)
{
return(false);
}
var list = other as ListTuple;
if (!object.ReferenceEquals(list, null))
{
if (list.m_count != m_count)
{
return(false);
}
if (list.m_offset == 0 && list.m_count == list.m_items.Length)
{
return(CompareItems(list.m_items, comparer));
}
else
{
return(CompareItems(list, comparer));
}
}
return(STuple.Equals(this, other, comparer));
}
public ITuple this[int?fromIncluded, int?toExcluded]
{
get
{
int begin = fromIncluded.HasValue ? STuple.MapIndexBounded(fromIncluded.Value, m_count) : 0;
int end = toExcluded.HasValue ? STuple.MapIndexBounded(toExcluded.Value, m_count) : m_count;
if (end <= begin)
{
return(STuple.Empty);
}
int p = this.Head.Count;
if (begin >= p)
{ // all selected items are in the tail
return(this.Tail[begin - p, end - p]);
}
else if (end <= p)
{ // all selected items are in the head
return(this.Head[begin, end]);
}
else
{ // selected items are both in head and tail
return(new JoinedTuple(this.Head[begin, null], this.Tail[null, end - p]));
}
}
}
public object this[int index]
{
get
{
index = STuple.MapIndex(index, m_count);
return(index < m_split ? this.Head[index] : this.Tail[index - m_split]);
}
}
/// <summary>Return the typed value of an item of the tuple, given its position</summary>
/// <typeparam name="R">Expected type of the item</typeparam>
/// <param name="index">Position of the item (if negative, means relative from the end)</param>
/// <returns>Value of the item at position <paramref name="index"/>, adapted into type <typeparamref name="R"/>.</returns>
public R Get <R>(int index)
{
if (index > 0 || index < -1)
{
STuple.FailIndexOutOfRange(index, 1);
}
return(FdbConverters.Convert <T1, R>(this.Item1));
}
public override string ToString()
{
return(new StringBuilder(32).Append('(')
.Append(STuple.Stringify(this.Item1)).Append(", ")
.Append(STuple.Stringify(this.Item2)).Append(", ")
.Append(STuple.Stringify(this.Item3)).Append(')')
.ToString());
}
int IStructuralEquatable.GetHashCode(IEqualityComparer comparer)
{
return(STuple.CombineHashCodes(
comparer.GetHashCode(this.Item1),
comparer.GetHashCode(this.Item2),
comparer.GetHashCode(this.Item3)
));
}
public static ITuple Append <T1, T2, T3, T4>([NotNull] this ITuple tuple, T1 value1, T2 value2, T3 value3, T4 value4)
{
if (tuple == null)
{
throw new ArgumentNullException(nameof(tuple));
}
return(new JoinedTuple(tuple, STuple.Create <T1, T2, T3, T4>(value1, value2, value3, value4)));
}
public override T DecodeOrderedSelfTerm(ref SliceReader input)
{
//HACKHACK: we lose the current depth!
var reader = new TupleReader(input);
T value;
bool res = STuple.DecodeNext <T>(ref reader, out value);
input = reader.Input;
return(res ? value : m_missingValue);
}
public static ITuple ToTupleOrDefault(this Slice slice)
{
//note: this method is here to allow a fluent API with method chaining, like "something.ToFoundationDbKey().ToTuple().With((int x, int y) => .....)"
if (slice.IsNullOrEmpty)
{
return(slice.HasValue ? STuple.Empty : null);
}
return(STuple.Unpack(slice));
}
public object this[int index]
{
get
{
if (index > 0 || index < -1)
{
STuple.FailIndexOutOfRange(index, 1);
}
return(this.Item1);
}
}
bool IStructuralEquatable.Equals(object other, IEqualityComparer comparer)
{
if (other == null)
{
return(false);
}
if (other is STuple <T1> )
{
return(comparer.Equals(this.Item1, ((STuple <T1>)other).Item1));
}
return(STuple.Equals(this, other, comparer));
}
/// <summary>Return the typed value of an item of the tuple, given its position</summary>
/// <typeparam name="R">Expected type of the item</typeparam>
/// <param name="index">Position of the item (if negative, means relative from the end)</param>
/// <returns>Value of the item at position <paramref name="index"/>, adapted into type <typeparamref name="R"/>.</returns>
public R Get <R>(int index)
{
switch (index)
{
case 0:
case -2: return(FdbConverters.Convert <T1, R>(this.Item1));
case 1:
case -1: return(FdbConverters.Convert <T2, R>(this.Item2));
default: STuple.FailIndexOutOfRange(index, 2); return(default(R));
}
}
bool System.Collections.IStructuralEquatable.Equals(object other, System.Collections.IEqualityComparer comparer)
{
if (other == null)
{
return(false);
}
if (other is STuple <T1, T2> )
{
var tuple = (STuple <T1, T2>)other;
return(comparer.Equals(this.Item1, tuple.Item1) &&
comparer.Equals(this.Item2, tuple.Item2));
}
return(STuple.Equals(this, other, comparer));
}
/// <summary>Test if the end of current tuple is equal to another tuple</summary>
/// <param name="left">Larger tuple</param>
/// <param name="right">Smaller tuple</param>
/// <returns>True if the end of <paramref name="left"/> is equal to <paramref name="right"/> or if both tuples are identical</returns>
public static bool EndsWith([NotNull] this ITuple left, [NotNull] ITuple right)
{
if (left == null)
{
throw new ArgumentNullException(nameof(left));
}
if (right == null)
{
throw new ArgumentNullException(nameof(right));
}
//REVIEW: move this on ITuple interface ?
return(STuple.EndsWith(left, right));
}
bool IStructuralEquatable.Equals(object other, IEqualityComparer comparer)
{
if (other == null)
{
return(false);
}
if (other is STuple <T1, T2, T3> )
{
var tuple = (STuple <T1, T2, T3>)other;
return(comparer.Equals(this.Item1, tuple.Item1) &&
comparer.Equals(this.Item2, tuple.Item2) &&
comparer.Equals(this.Item3, tuple.Item3));
}
return(STuple.Equals(this, other, comparer));
}
public bool Equals(ITuple other)
{
if (object.ReferenceEquals(other, null))
{
return(false);
}
var memoized = other as MemoizedTuple;
if (!object.ReferenceEquals(memoized, null))
{
return(m_packed.Equals(memoized.m_packed));
}
return(STuple.Equals(this, other, SimilarValueComparer.Default));
}
public ITuple this[int?fromIncluded, int?toExcluded]
{
get
{
int begin = fromIncluded.HasValue ? STuple.MapIndexBounded(fromIncluded.Value, m_count) : 0;
int end = toExcluded.HasValue ? STuple.MapIndexBounded(toExcluded.Value, m_count) : m_count;
int len = end - begin;
if (len <= 0)
{
return(STuple.Empty);
}
if (begin == 0 && len == m_count)
{
return(this);
}
return(new SlicedTuple(m_slices, m_offset + begin, len));
}
}
int IStructuralEquatable.GetHashCode(IEqualityComparer comparer)
{
bool canUseCache = object.ReferenceEquals(comparer, SimilarValueComparer.Default);
if (m_hashCode.HasValue && canUseCache)
{
return(m_hashCode.Value);
}
int h = 0;
for (int i = 0; i < m_count; i++)
{
h = STuple.CombineHashCodes(h, comparer.GetHashCode(m_slices[i + m_offset]));
}
if (canUseCache)
{
m_hashCode = h;
}
return(h);
}
/// <summary>Return the typed value of an item of the tuple, given its position</summary>
/// <typeparam name="R">Expected type of the item</typeparam>
/// <param name="index">Position of the item (if negative, means relative from the end)</param>
/// <returns>Value of the item at position <paramref name="index"/>, adapted into type <typeparamref name="R"/>.</returns>
public R Get <R>(int index)
{
switch (index)
{
case 0:
case -5: return(FdbConverters.Convert <T1, R>(this.Item1));
case 1:
case -4: return(FdbConverters.Convert <T2, R>(this.Item2));
case 2:
case -3: return(FdbConverters.Convert <T3, R>(this.Item3));
case 3:
case -2: return(FdbConverters.Convert <T4, R>(this.Item4));
case 4:
case -1: return(FdbConverters.Convert <T5, R>(this.Item5));
default: STuple.FailIndexOutOfRange(index, 5); return(default(R));
}
}
/// <summary>Create a formatter that just add or remove a prefix to values</summary>
public static ITupleFormatter <T> CreateAppender(ITuple prefix)
{
if (prefix == null)
{
throw new ArgumentNullException(nameof(prefix));
}
return(new AnonymousTupleFormatter <T>(
(value) => prefix.Append <T>(value),
(tuple) =>
{
if (tuple.Count != prefix.Count + 1)
{
throw new ArgumentException("Tuple size is invalid", nameof(tuple));
}
if (!STuple.StartsWith(tuple, prefix))
{
throw new ArgumentException("Tuple does not start with the expected prefix", nameof(tuple));
}
return tuple.Last <T>();
}
));
}
public ITuple this[int?fromIncluded, int?toExcluded]
{
get
{
int begin = fromIncluded.HasValue ? STuple.MapIndexBounded(fromIncluded.Value, m_count) : 0;
int end = toExcluded.HasValue ? STuple.MapIndexBounded(toExcluded.Value, m_count) : m_count;
int len = end - begin;
if (len <= 0)
{
return(STuple.Empty);
}
if (begin == 0 && len == m_count)
{
return(this);
}
Contract.Assert(m_offset + begin >= m_offset);
Contract.Assert(len >= 0 && len <= m_count);
return(new ListTuple(m_items, m_offset + begin, len));
}
}
int IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer comparer)
{
// the cached hashcode is only valid for the default comparer!
bool canUseCache = object.ReferenceEquals(comparer, SimilarValueComparer.Default);
if (m_hashCode.HasValue && canUseCache)
{
return(m_hashCode.Value);
}
int h = 0;
for (int i = 0; i < m_count; i++)
{
var item = m_items[i + m_offset];
h = STuple.CombineHashCodes(h, comparer.GetHashCode(item));
}
if (canUseCache)
{
m_hashCode = h;
}
return(h);
}
