public virtual IDataWriter Find(string extension)
{
extension = DataProviderUtility.NormalizeExtension(extension);
IDataWriter writer;
if (this.WritersByExt.TryGetValue(extension, out writer))
{
return(writer);
}
return(null);
}
/// <summary>
/// Ctor
/// </summary>
/// <param name="writers">inject with all possible writers</param>
public DataWriterProvider(IEnumerable <IDataWriter> writers)
{
if (writers != null)
{
foreach (IDataWriter writer in writers)
{
if (this.DefaultWriter == null)
{
// TODO: decide less arbitrary way to choose default
// without hardcoding value into IDataWriter.
// Currently first DataWriter wins default.
this.DefaultWriter = writer;
}
foreach (string contentType in writer.ContentType)
{
if (String.IsNullOrEmpty(contentType) ||
this.WritersByMime.ContainsKey(contentType))
{
continue;
}
this.WritersByMime[contentType] = writer;
}
foreach (string fileExt in writer.FileExtension)
{
if (String.IsNullOrEmpty(fileExt) ||
this.WritersByExt.ContainsKey(fileExt))
{
continue;
}
string ext = DataProviderUtility.NormalizeExtension(fileExt);
this.WritersByExt[ext] = writer;
}
}
}
}