Gemstone IO Library
File
Creates a new instance of the FileBackedHashSetT class.
Definition
Namespace: Gemstone.IO.Collections
Assembly: Gemstone.IO (in Gemstone.IO.dll) Version: 1.0.180 -- Release Build+63df2143112b7a7e4d3dab98333769b428165a7d
Assembly: Gemstone.IO (in Gemstone.IO.dll) Version: 1.0.180 -- Release Build+63df2143112b7a7e4d3dab98333769b428165a7d
C#
public FileBackedHashSet(
string filePath,
IEnumerable<T> enumerable
)VB
Public Sub New (
filePath As String,
enumerable As IEnumerable(Of T)
)C++
public:
FileBackedHashSet(
String^ filePath,
IEnumerable<T>^ enumerable
)JavaScript
Gemstone.IO.Collections.FileBackedHashSet = function(filePath, enumerable);Parameters
- filePath String
- The path to the file used to store the lookup table.
- enumerable IEnumerableT
- The enumerable whose elements are copied to this hash set.
Remarks
This constructor uses the default equality comparer for file backed lookup tables,
which is not the same as the default equality comparer for T
objects. This is because the default implementation of GetHashCode
does not provide guarantees about consistency across platforms, or even implementations
of the CLR. Instead, the default equality comparer uses a byte-for-byte comparison to
determine equality between keys and a CRC-32 for its hash code implementation. This
means the performance of the hashing function is dependent on the performance of the
serialization function.
Exceptions
| ArgumentException | filePath is a zero-length string, contains only white space, or contains one or more invalid characters as defined by GetInvalidPathChars. |
| ArgumentNullException | filePath is null or enumerable is null. |
| InvalidOperationException | T cannot be serialized. |