/// <summary>
/// Creates a new stream adapter metadata.
/// </summary>
/// <param name="streamAdapterType">The type of the stream adapter.</param>
/// <param name="logWriter">The log writer where errors should be written to.</param>
/// <returns>A stream adapter metadata.</returns>
public static StreamAdapterMetadata Create(Type streamAdapterType, VisualizationLogWriter logWriter)
{
if (streamAdapterType == null)
{
throw new NullReferenceException(nameof(streamAdapterType));
}
// Stream adapter must not be a generic type
if (streamAdapterType.IsGenericType)
{
logWriter.WriteError("StreamAdapter {0} could not be loaded because it is a generic type", streamAdapterType.Name);
return(null);
}
// Find the stream adapter base type
Type baseStreamAdapterType = streamAdapterType;
while ((baseStreamAdapterType != null) && (baseStreamAdapterType.Name != typeof(StreamAdapter <,>).Name))
{
baseStreamAdapterType = baseStreamAdapterType.BaseType;
}
// Make sure ouor type really derives from the base stream adapter type.
if (baseStreamAdapterType == null)
{
logWriter.WriteError("StreamAdapter {0} could not be loaded because it is not derived from StreamAdapter<TSrc, TDest>", streamAdapterType.Name);
return(null);
}
// Create the stream adapter metadata
return(new StreamAdapterMetadata(baseStreamAdapterType.GenericTypeArguments[0], baseStreamAdapterType.GenericTypeArguments[1], streamAdapterType));
}
/// <summary>
/// Creates a new summarizer metadata.
/// </summary>
/// <param name="summarizerType">The type of the summarizer.</param>
/// <param name="logWriter">The log writer where errors should be written to.</param>
/// <returns>A summarizer metadata.</returns>
public static SummarizerMetadata Create(Type summarizerType, VisualizationLogWriter logWriter)
{
if (summarizerType == null)
{
throw new NullReferenceException(nameof(summarizerType));
}
// Summarizer must not be a generic type
if (summarizerType.IsGenericType)
{
logWriter.WriteError("Summarizer {0} could not be loaded because it is a generic type", summarizerType.Name);
return(null);
}
// Summarizers must be directly derived from Summarizer<TSrc, TDest>
Type baseType = summarizerType.BaseType;
if (baseType.Name != typeof(Summarizer <,>).Name || baseType.Module.Name != typeof(Summarizer <,>).Module.Name)
{
logWriter.WriteError("Summarizer {0} could not be loaded because it is not directly derived from Summarizer<TSrc, TDest>", summarizerType.Name);
return(null);
}
// Create the summarizer metadata
return(new SummarizerMetadata(summarizerType.BaseType.GenericTypeArguments[0], summarizerType.BaseType.GenericTypeArguments[1], summarizerType));
}
private static BatchProcessingTaskAttribute GetBatchProcessingTaskAttribute(Type taskType, VisualizationLogWriter logWriter)
{
var taskAttribute = taskType.GetCustomAttribute <BatchProcessingTaskAttribute>();
if (taskAttribute == null)
{
logWriter.WriteError($"Task {0} could not be loaded because it is not decorated with a {nameof(BatchProcessingTaskAttribute)}", taskType.Name);
return(null);
}
if (string.IsNullOrWhiteSpace(taskAttribute.Name))
{
logWriter.WriteError($"Task {0} could not be loaded because its {nameof(BatchProcessingTaskAttribute)} does not specify a Name property", taskType.Name);
return(null);
}
return(taskAttribute);
}