/// <summary>
/// Checks if a schema has a specific column name.
/// </summary>
/// <param name="column">The name of the column to verify.</param>
/// <returns>A callback asserting the presence of the column in the schema.</returns>
private static Action <StructType> HasColumn(string column) =>
schema =>
{
if (!AnalyzersExt.HasColumn(schema, column))
{
throw new Exception("Input data does not include column!");
}
};
/// <inheritdoc cref="StandardScanShareableAnalyzer{S}.AdditionalPreconditions" />
public override IEnumerable <Action <StructType> > AdditionalPreconditions()
{
return(new[]
{
AnalyzersExt.HasColumn(ColumnA), AnalyzersExt.IsNumeric(ColumnA),
AnalyzersExt.HasColumn(ColumnB), AnalyzersExt.IsNumeric(ColumnB)
});
}
/// <inheritdoc cref="StandardScanShareableAnalyzer{S}.AdditionalPreconditions"/>
public override IEnumerable <Action <StructType> > AdditionalPreconditions() =>
new[] { AnalyzersExt.HasColumn(Column), AnalyzersExt.IsString(Column.GetOrElse(string.Empty)) };
/// <inheritdoc cref="StandardScanShareableAnalyzer{S}.AdditionalPreconditions"/>
public override IEnumerable <Action <StructType> > AdditionalPreconditions() =>
new[] { AnalyzersExt.HasColumn(Column), AnalyzersExt.IsNotNested(Column) };
/// <inheritdoc cref="StandardScanShareableAnalyzer{S}.Preconditions"/>.
public override IEnumerable <Action <StructType> > Preconditions() =>
new[] { AnalyzersExt.HasColumn(Column), AnalyzersExt.IsNotNested(Column) }.Concat(base.Preconditions());
/// <inheritdoc cref="Analyzer{S,M}.Preconditions"/>
public override IEnumerable <Action <StructType> > Preconditions() =>
new[] { PARAM_CHECK(), AnalyzersExt.HasColumn(Column) };