/// <summary>
/// Method called by the EvaluationEngine when an attribute is not found.
/// </summary>
/// <param name="context">The evaluation context instance.</param>
/// <param name="designator">The attribute designator.</param>
/// <returns>An instance of an Attribute with it's value.</returns>
public AttributeElement GetAttribute(EvaluationContext context, AttributeDesignatorBase designator)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (designator == null)
{
throw new ArgumentNullException("designator");
}
foreach (var attrib in _attributes.Cast <AttributeElement>().Where(attrib => attrib.AttributeId == designator.AttributeId))
{
if (!string.IsNullOrEmpty(designator.Issuer))
{
if (designator.Issuer == attrib.Issuer)
{
return(attrib);
}
}
else
{
return(attrib);
}
}
return(null);
}
/// <summary>
/// Matches the designator within the values of this attribute element.
/// </summary>
/// <param name="attributeDesignator">The attribute designator instance.</param>
/// <returns><c>true</c> if the designator matches with this attribute.</returns>
public bool Match(AttributeDesignatorBase attributeDesignator)
{
if (attributeDesignator == null)
{
throw new ArgumentNullException("attributeDesignator");
}
if (AttributeId != attributeDesignator.AttributeId || DataType != attributeDesignator.DataType)
{
return(false);
}
if (string.IsNullOrEmpty(attributeDesignator.Issuer))
{
return(true);
}
return(Issuer == attributeDesignator.Issuer);
}
/// <summary>
/// Matches the designator within the values of this attribute element.
/// </summary>
/// <param name="attributeDesignator">The attribute designator instance.</param>
/// <returns><c>true</c> if the designator matches with this attribute.</returns>
public bool Match(AttributeDesignatorBase attributeDesignator)
{
if (attributeDesignator == null) throw new ArgumentNullException("attributeDesignator");
if (AttributeId != attributeDesignator.AttributeId || DataType != attributeDesignator.DataType)
return false;
if (string.IsNullOrEmpty(attributeDesignator.Issuer)) return true;
return Issuer == attributeDesignator.Issuer;
}