/// <summary>
/// Get a named parameter.
/// </summary>
/// <remarks>
/// Will throw <see cref="DreamAbortException"/> if the named parameter does not exist.
/// </remarks>
/// <param name="key"><see cref="DreamFeatureParamAttribute"/> name.</param>
/// <returns>Text value of parameter.</returns>
/// <exception cref="DreamAbortException">Throws if parameter does not exist.</exception>
public string GetParam(string key)
{
EnsureFeatureIsSet();
if (key == null)
{
throw new ArgumentNullException("key");
}
string result;
string[] values;
_pathParams.TryGetValue(key, out values);
if ((values != null) && (values.Length > 0))
{
result = values[0];
}
else
{
result = Uri.GetParam(key, null);
}
if (result == null)
{
throw new DreamAbortException(DreamMessage.BadRequest(string.Format("missing feature parameter '{0}'", key)));
}
return(result);
}
/// <summary>
/// Get a named parameter.
/// </summary>
/// <typeparam name="T">Type to convert parameter to.</typeparam>
/// <param name="key"><see cref="DreamFeatureParamAttribute"/> name.</param>
/// <returns>Parameter value converted to requested type.</returns>
public T GetParam <T>(string key)
{
string result = GetParam(key);
try {
return((T)SysUtil.ChangeType(result, typeof(T)));
} catch {
throw new DreamAbortException(DreamMessage.BadRequest(string.Format("invalid value for feature parameter '{0}'", key)));
}
}
/// <summary>
/// Get a named parameter.
/// </summary>
/// <typeparam name="T">Type to convert parameter to.</typeparam>
/// <param name="key"><see cref="DreamFeatureParamAttribute"/> name.</param>
/// <param name="def">Default value to return in case parameter is not defined.</param>
/// <returns>Parameter value converted to requested type.</returns>
public T GetParam <T>(string key, T def) where T : struct
{
string result = GetParam(key, null);
if (result != null)
{
try {
return((T)SysUtil.ChangeType <T>(result));
} catch {
throw new DreamAbortException(DreamMessage.BadRequest(string.Format("invalid value for feature parameter '{0}'", key)));
}
}
return(def);
}
private static DreamFeatureAdapter MakeConvertingContextParamGetter(string name, Type type)
{
return(new DreamFeatureAdapter(name, (context, request, response) => {
object value = context.GetParam(name, null);
if (value == null && type.IsInterface)
{
object resolvedInstance;
if (context.Container.TryResolve(type, out resolvedInstance))
{
return resolvedInstance;
}
}
if (value != null)
{
return SysUtil.ChangeType(value, type);
}
if (!type.IsValueType || (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>)))
{
return null;
}
throw new DreamAbortException(DreamMessage.BadRequest(string.Format("invalid value for feature parameter '{0}'", name)));
}));
}
/// <summary>
/// Create a new instance for a <see cref="DreamStatus.BadRequest"/> condition.
/// </summary>
/// <param name="message">Text message to use for <see cref="Exception.Message"/> and the internal <see cref="DreamMessage"/>.</param>
/// <param name="innerException">Inner Exception</param>
public DreamBadRequestException(string message, Exception innerException) : base(DreamMessage.BadRequest(message), message, innerException)
{
}
//--- Constructors ---
/// <summary>
/// Create a new instance for a <see cref="DreamStatus.BadRequest"/> condition.
/// </summary>
/// <param name="message">Text message to use for <see cref="Exception.Message"/> and the internal <see cref="DreamMessage"/>.</param>
public DreamBadRequestException(string message) : base(DreamMessage.BadRequest(message), message)
{
}
