public DictionaryColumn()
{
ITypeProvider typeProvider = TypeProviderFactory.Get(typeof(TColumnType));
_comparer = (IXArrayComparer <TColumnType>)typeProvider.TryGetComparer();
_copier = (IValueCopier <TColumnType>)typeProvider.TryGetCopier();
}
public static ComparerExtensions.Comparer TryGetComparer(this ITypeProvider typeProvider, CompareOperator op)
{
IXArrayComparer comparer = typeProvider.TryGetComparer();
if (comparer == null)
{
return(null);
}
return(comparer.TryBuild(op));
}
public static Comparer TryBuild(this IXArrayComparer comparer, CompareOperator cOp)
{
// Return text comparisons if this is a text comparer only
IXArrayTextComparer textComparer = comparer as IXArrayTextComparer;
if (textComparer != null)
{
switch (cOp)
{
case CompareOperator.Contains:
return(textComparer.WhereContains);
case CompareOperator.ContainsExact:
return(textComparer.WhereContainsExact);
case CompareOperator.StartsWith:
return(textComparer.WhereStartsWith);
case CompareOperator.EndsWith:
return(textComparer.WhereEndsWith);
}
}
// Return the function for the desired comparison operation
switch (cOp)
{
case CompareOperator.Equal:
return(comparer.WhereEqual);
case CompareOperator.NotEqual:
return(comparer.WhereNotEqual);
case CompareOperator.GreaterThan:
return(comparer.WhereGreaterThan);
case CompareOperator.GreaterThanOrEqual:
return(comparer.WhereGreaterThanOrEqual);
case CompareOperator.LessThan:
return(comparer.WhereLessThan);
case CompareOperator.LessThanOrEqual:
return(comparer.WhereLessThanOrEqual);
case CompareOperator.Contains:
// Contains resolves to Equals by default
return(comparer.WhereEqual);
}
// Throw if this comparison isn't supported
throw new ArgumentException($"{cOp} not supported for column");
}
public EqualityComparerAdapter(IXArrayComparer inner)
{
_inner = (IXArrayComparer <T>)inner;
}
