/// <summary>
/// Initializes a new instance of the <see cref="FileBackedProcessingPipelineStageSetting{T}"/> class.
/// </summary>
/// <param name="rawSetting">The corresponding raw setting in the configuration.</param>
/// <param name="valueToStringConverter">Delegate that converts a string to the setting value.</param>
/// <param name="stringToValueConverter">Delegate that converts the setting value to a string.</param>
internal FileBackedProcessingPipelineStageSetting(
FileBackedProcessingPipelineStageRawSetting rawSetting,
ObjectToStringConversionDelegate <T> valueToStringConverter,
StringToObjectConversionDelegate <T> stringToValueConverter)
{
mRawSetting = rawSetting;
mValueToStringConverter = valueToStringConverter;
mStringToValueConverter = stringToValueConverter;
}
/// <summary>
/// Sets the setting with the specified name (supports custom types using the specified converters).
/// Creates a new setting, if it does not exist, yet.
/// </summary>
/// <typeparam name="T">Type of the setting.</typeparam>
/// <param name="name">
/// Name of the setting. The following characters are allowed:
/// - alphanumeric characters ( a-z, A-Z, 0-9 )
/// - square brackets ( [] )
/// - Period (.)
/// </param>
/// <param name="value">New value of the setting.</param>
/// <param name="valueToStringConverter">Delegate that converts the object to its string representation.</param>
/// <param name="stringToValueConverter">Delegate that converts the string representation to an object of the type <typeparamref name="T"/>.</param>
/// <returns>The setting.</returns>
/// <exception cref="ArgumentNullException">
/// The argument <paramref name="name"/>, <paramref name="valueToStringConverter"/> and/or <paramref name="stringToValueConverter"/> is <c>null</c>.
/// </exception>
/// <exception cref="ArgumentException">
/// The setting exists already, but the specified type differs from the value type of the existing setting.
/// </exception>
/// <exception cref="FormatException">
/// The <paramref name="name"/> is not a valid setting name.
/// </exception>
public override IProcessingPipelineStageSetting <T> SetSetting <T>(
string name,
T value,
ObjectToStringConversionDelegate <T> valueToStringConverter,
StringToObjectConversionDelegate <T> stringToValueConverter)
{
// check arguments
if (valueToStringConverter == null)
{
throw new ArgumentNullException(nameof(valueToStringConverter));
}
if (stringToValueConverter == null)
{
throw new ArgumentNullException(nameof(stringToValueConverter));
}
CheckSettingName(name);
lock (Sync)
{
if (!mSettings.TryGetValue(name, out var setting))
{
// the setting was not requested before
// => create a setting
var rawSetting = new FileBackedProcessingPipelineStageRawSetting(this, name);
setting = new FileBackedProcessingPipelineStageSetting <T>(rawSetting, valueToStringConverter, stringToValueConverter);
mSettings.Add(name, setting);
}
// setting with the name exists
// ensure that the setting value types are the same
if (setting.ValueType != typeof(T))
{
string message = $"The setting exists already, but the specified types ({typeof(T).FullName}) differs from the value type of the existing setting ({setting.ValueType.FullName}).";
throw new ArgumentException(message);
}
// set the value
setting.Value = value;
return((IProcessingPipelineStageSetting <T>)setting);
}
}
/// <summary>
/// Registers the setting with the specified name (supports custom types using the specified converters).
/// Creates a new setting with the specified value, if the setting does not exist.
/// </summary>
/// <typeparam name="T">Type of the setting.</typeparam>
/// <param name="name">
/// Name of the setting. The following characters are allowed:
/// - alphanumeric characters ( a-z, A-Z, 0-9 )
/// - square brackets ( [] )
/// - Period (.)
/// </param>
/// <param name="defaultValue">Value of the setting, if the setting does not exist, yet.</param>
/// <param name="valueToStringConverter">Delegate that converts a setting value to its string representation.</param>
/// <param name="stringToValueConverter">Delegate that converts the string representation of a setting value to an object of the specified type.</param>
/// <returns>The setting.</returns>
/// <exception cref="ArgumentNullException">
/// The argument <paramref name="name"/>, <paramref name="valueToStringConverter"/> and/or <paramref name="stringToValueConverter"/> is <c>null</c>.
/// </exception>
/// <exception cref="ArgumentException">
/// The setting exists already, but the specified type differs from the value type of the existing setting.
/// </exception>
/// <exception cref="FormatException">
/// The <paramref name="name"/> is not a valid setting name.
/// </exception>
public override IProcessingPipelineStageSetting <T> RegisterSetting <T>(
string name,
T defaultValue,
ObjectToStringConversionDelegate <T> valueToStringConverter,
StringToObjectConversionDelegate <T> stringToValueConverter)
{
// check arguments
if (valueToStringConverter == null)
{
throw new ArgumentNullException(nameof(valueToStringConverter));
}
if (stringToValueConverter == null)
{
throw new ArgumentNullException(nameof(stringToValueConverter));
}
CheckSettingName(name);
lock (Sync)
{
FileBackedProcessingPipelineStageRawSetting rawSetting;
bool isNewSetting = false;
if (!mSettings.TryGetValue(name, out var setting))
{
// the setting was not requested before
// => create a setting
isNewSetting = true;
rawSetting = new FileBackedProcessingPipelineStageRawSetting(this, name, valueToStringConverter(defaultValue, CultureInfo.InvariantCulture));
setting = new FileBackedProcessingPipelineStageSetting <T>(rawSetting, valueToStringConverter, stringToValueConverter);
mSettings.Add(name, setting);
}
// setting with the name exists
// ensure that the setting value types are the same
if (setting.ValueType != typeof(T))
{
string message = $"The setting exists already, but the specified types ({typeof(T).FullName}) differs from the value type of the existing setting ({setting.ValueType.FullName}).";
throw new ArgumentException(message);
}
// set the default value of the raw item, if it is not already set
// (this can happen, if a setting has been created without a default value before)
rawSetting = ((FileBackedProcessingPipelineStageSetting <T>)setting).Raw;
if (!rawSetting.HasDefaultValue)
{
rawSetting.DefaultValue = valueToStringConverter(defaultValue, CultureInfo.InvariantCulture);
}
// ensure that the setting default values are the same
string settingDefaultValueAsString = valueToStringConverter(((FileBackedProcessingPipelineStageSetting <T>)setting).DefaultValue, CultureInfo.InvariantCulture);
string defaultValueAsString = valueToStringConverter(defaultValue, CultureInfo.InvariantCulture);
if (settingDefaultValueAsString != defaultValueAsString)
{
string message = $"The setting exists already, but the specified default value ({defaultValueAsString}) does not match the default value of the existing setting ({settingDefaultValueAsString}).";
throw new ArgumentException(message);
}
// the setting with the specified name has been registered successfully
// => notify, if a new setting was added (changes are handled differently)
if (isNewSetting)
{
LogConfiguration.OnChanged();
}
return((IProcessingPipelineStageSetting <T>)setting);
}
}
