private static JToken[] SelectTokens([NotNull] JToken[] tokens, [NotNull] IConfigurationSelector <JToken, JToken> selector)
{
if (tokens == null)
{
throw new ArgumentNullException(nameof(tokens));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
var configs = new JToken[tokens.Length];
for (var i = 0; i < tokens.Length; i++)
{
var config = tokens[i];
if (config != null)
{
config = selector.Select(config);
}
configs[i] = config;
}
return(configs);
}
/// <summary>
/// Initializes new instance of <see cref="MicrosoftConfigurationCache{T}"/>.
/// </summary>
/// <param name="configurationProvider">Configuration provider.</param>
/// <param name="selector">Configuration selector.</param>
/// <param name="changeTokenSource">Change token.</param>
public MicrosoftConfigurationCache(
[NotNull] IConfigurationProvider <IConfiguration, IConfiguration> configurationProvider,
[CanBeNull] IConfigurationSelector <IConfiguration, IConfiguration> selector,
[NotNull] MicrosoftConfigurationChangeTokenSource changeTokenSource)
{
if (changeTokenSource == null)
{
throw new ArgumentNullException(nameof(changeTokenSource));
}
_configurationProvider = configurationProvider ?? throw new ArgumentNullException(nameof(configurationProvider));
_selector = selector;
_changeTokenListener = ChangeToken.OnChange(changeTokenSource.GetChangeToken, () => _lazyConfig = CreateLazyConfig());
_lazyConfig = CreateLazyConfig();
}
private JToken[] SelectTokens(IConfigurationSelector <JToken, JToken> selector)
{
if (selector == null)
{
return(_tokens);
}
var configs = new JToken[_tokens.Length];
for (var i = 0; i < _tokens.Length; i++)
{
var config = _tokens[i];
if (config != null)
{
config = selector.Select(config);
}
configs[i] = config;
}
return(configs);
}
/// <inheritdoc />
public TConfiguration GetConfiguration <TConfiguration>(IConfigurationSelector <JToken, JToken> selector = null)
{
var tokens = SelectTokens(selector);
return(_tokenConverter.Convert <TConfiguration>(tokens));
}
/// <inheritdoc />
public TConfiguration GetConfiguration <TConfiguration>(IConfigurationSelector <IConfiguration, IConfiguration> selector = null)
{
var configuration = selector == null ? _configuration : selector.Select(_configuration);
return(_converter.Convert <TConfiguration>(configuration));
}
