private static TOptions SetEnvironmentVariables <TOptions>(TOptions eventStoreArguments, string environmentPrefix) where TOptions : class, IOptions, new()
{
var instanceToUseForDefaultValueComparrison = new TOptions();
foreach (var property in typeof(TOptions).GetProperties())
{
var defaultValue = property.GetValue(instanceToUseForDefaultValueComparrison, null);
var environmentVariableName = EnvironmentVariableNameProvider.GetName(environmentPrefix, property.Name);
var environmentVariableValue = Environment.GetEnvironmentVariable(environmentVariableName);
var currentValue = property.GetValue(eventStoreArguments, null);
if (defaultValue != null &&
defaultValue.Equals(currentValue) &&
environmentVariableValue != null)
{
try
{
var typeConverter = GetTypeConverter(property.PropertyType);
var valueToUse = typeConverter.ConvertFrom(environmentVariableValue);
SetDumpedOptions(property.Name, FromEnvironmentVariable, valueToUse);
property.SetValue(eventStoreArguments, valueToUse, null);
}
catch (Exception ex)
{
throw new OptionException(ex.Message, property.Name);
}
}
}
return(eventStoreArguments);
}
public OptionSource[] Parse <TOptions>(string environmentPrefix) where TOptions : class
{
_parsedOptions = new List <OptionSource>();
foreach (var property in typeof(TOptions).GetProperties())
{
var environmentVariableName = EnvironmentVariableNameProvider.GetName(environmentPrefix, property.Name);
var environmentVariableValue = Environment.GetEnvironmentVariable(environmentVariableName);
if (!String.IsNullOrEmpty(environmentVariableValue))
{
_parsedOptions.Add(new OptionSource("Environment Variable", property.Name, environmentVariableValue));
}
}
return(_parsedOptions.ToArray());
}
