public void Add(string sourceColumn, string destinationColumn, ColumnTransformDelegate columnTransform)
{
if (string.IsNullOrWhiteSpace(sourceColumn))
{
throw new ArgumentNullException(nameof(sourceColumn), "Destination column '" + destinationColumn + "' must have a corresponding source column.");
}
if (string.IsNullOrWhiteSpace(sourceColumn))
{
throw new ArgumentNullException(nameof(destinationColumn), "Source column '" + sourceColumn + "' must have a corresponding destination column.");
}
if (!ContainsSourceColumn(sourceColumn) && !ContainsDestinationColumn(destinationColumn))
{
SourceToDestination.Add(sourceColumn, destinationColumn);
DestinationToSource.Add(destinationColumn, sourceColumn);
}
else if (ContainsSourceColumn(sourceColumn) && GetDestinationColumn(sourceColumn) != destinationColumn)
{
throw new ArgumentException("The source column '" + sourceColumn + "' cannot be mapped to destination column '" + destinationColumn + "' because it has already been mapped to the column '" + GetDestinationColumn(sourceColumn) + "'.");
}
else if (ContainsDestinationColumn(destinationColumn) && GetSourceColumn(destinationColumn) != sourceColumn)
{
throw new ArgumentException("The destination column '" + destinationColumn + "' cannot be mapped to source column '" + sourceColumn + "' because it has already been mapped to the column '" + GetSourceColumn(destinationColumn) + "'.");
}
if (columnTransform != null)
{
AddColumnTransform(sourceColumn, columnTransform);
}
}
/// <summary>
/// Adds the specified column transform to the transform list at the specified location for the specified source column
/// </summary>
/// <param name="sourceColumn">The name of the source column for which to add the column transform</param>
/// <param name="columnTransform">The transform delegate to add</param>
/// <param name="executionOrder">The order of execution for this transform</param>
public void AddColumnTransform(string sourceColumn, ColumnTransformDelegate columnTransform, int executionOrder)
{
AddColumnTransform(sourceColumn, new DataColumnTransform(columnTransform, executionOrder));
}
/// <summary>
/// Adds the specified column transform to the end of the transform list for the specified source column
/// </summary>
/// <param name="sourceColumn">The name of the source column for which to add the column transform</param>
/// <param name="columnTransform">The transform delegate to add</param>
public void AddColumnTransform(string sourceColumn, ColumnTransformDelegate columnTransform)
{
AddColumnTransform(sourceColumn, columnTransform, GetMaxExecutionOrder(sourceColumn) + 1);
}
public DataColumnTransform(ColumnTransformDelegate transform, int executionOrder)
: this(transform)
{
ExecutionOrder = executionOrder;
}
public DataColumnTransform(ColumnTransformDelegate transform)
{
Transform = transform;
}
protected DataColumnTransform()
{
Transform = IdentityTransform;
}