protected IEnumerable<string> GetEnvironmentAttributeDesignator(XacmlEnvironmentAttributeDesignator designator) {
Contract.Requires<ArgumentNullException>(designator != null);
IEnumerable<string> attributeBag = this.pip.GetEnvironmentAttributeDesignatorValues(
designator.AttributeId,
designator.DataType,
designator.Issuer
);
if (!attributeBag.Any()) {
if (designator.MustBePresent.HasValue && designator.MustBePresent.Value) {
// return "Indeterminate”
return null;
}
}
return attributeBag;
}
/// <summary>
/// Initializes a new instance of the <see cref="XacmlEnvironmentMatch"/> class.
/// </summary>
/// <param name="matchId">The match identifier.</param>
/// <param name="attributeValue">The attribute value.</param>
/// <param name="attributeDesignator">The attribute designator.</param>
public XacmlEnvironmentMatch(Uri matchId, XacmlAttributeValue attributeValue, XacmlEnvironmentAttributeDesignator attributeDesignator)
: base(matchId, attributeValue, attributeDesignator) {
Contract.Requires<ArgumentNullException>(matchId != null);
Contract.Requires<ArgumentNullException>(attributeValue != null);
Contract.Requires<ArgumentNullException>(attributeDesignator != null);
}