/// <summary>
/// Called by the 'BuildEngine' method to handle
/// creation of the engine instance.
/// </summary>
/// <param name="properties"></param>
/// <returns>
/// An <see cref="IAspectEngine"/>.
/// </returns>
protected override DeviceDetectionHashEngine NewEngine(
List <string> properties)
{
if (DataFiles.Count != 1)
{
throw new PipelineConfigurationException(
"This builder requires one and only one configured file " +
$"but it has {DataFileConfigs.Count}");
}
var dataFile = DataFiles.First();
// We remove the data file configuration from the list.
// This is because the on-premise engine builder base class
// adds all the data file configs after engine creation.
// However, the device detection data files are supplied
// directly to the constructor.
// Consequently, we remove it here to stop it from being added
// again by the base class.
DataFiles.Remove(dataFile);
// Update the swig configuration object.
SwigConfig.setUseUpperPrefixHeaders(false);
if (dataFile.Configuration.CreateTempCopy && String.IsNullOrEmpty(TempDir) == false)
{
using (var tempDirs = new VectorStringSwig())
{
tempDirs.Add(TempDir);
SwigConfig.setTempDirectories(tempDirs);
}
SwigConfig.setUseTempFile(true);
}
// Create swig property configuration object.
IRequiredPropertiesConfigSwigWrapper propertyConfig = null;
using (var vProperties = new VectorStringSwig(properties)) {
propertyConfig = SwigFactory.CreateRequiredProperties(vProperties);
}
return(new DeviceDetectionHashEngine(
_loggerFactory,
dataFile,
SwigConfig,
propertyConfig,
CreateAspectData,
TempDir,
SwigFactory));
}