protected virtual XacmlContextAttribute ReadContextAttribute(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (!reader.IsStartElement(XacmlConstants.ElementNames.Attribute, this.Version.NamespaceContext))
{
throw ThrowHelperXml(reader, "XML message is not valid.");
}
// Read attributes
Uri attributeId = this.ReadAttribute <Uri>(reader, XacmlConstants.AttributeNames.AttributeId, isRequered: true);
Uri dataType = this.ReadAttribute <Uri>(reader, XacmlConstants.AttributeNames.DataType, isRequered: true);
string issuer = this.ReadAttribute <string>(reader, XacmlConstants.AttributeNames.Issuer, isRequered: false);
DateTime?issueInstant = null;
string issueInstantString = this.ReadAttribute <string>(reader, XacmlConstants.AttributeNames.IssueInstant, isRequered: false);
if (!string.IsNullOrWhiteSpace(issueInstantString))
{
issueInstant = XmlConvert.ToDateTime(issueInstantString, XmlDateTimeSerializationMode.Local);
}
reader.ReadStartElement(XacmlConstants.ElementNames.Attribute, this.Version.NamespaceContext);
// Read elements
XacmlContextAttributeValue attrVal = this.ReadRequired(XacmlConstants.ElementNames.AttributeValue, this.Version.NamespaceContext, this.ReadContextAttributeValue, reader);
XacmlContextAttribute result = new XacmlContextAttribute(attributeId, dataType, attrVal)
{
Issuer = issuer,
IssueInstant = issueInstant,
};
reader.ReadEndElement();
return(result);
}
protected virtual void WriteContextAttribute(XmlWriter writer, XacmlContextAttribute attr)
{
if (writer == null)
{
throw new ArgumentNullException(nameof(writer));
}
if (attr == null)
{
throw new ArgumentNullException(nameof(attr));
}
writer.WriteStartElement(XacmlConstants.Prefixes.Context, XacmlConstants.ElementNames.Attribute, this.Version.NamespaceContext);
writer.WriteAttributeString(XacmlConstants.AttributeNames.AttributeId, attr.AttributeId.ToString());
writer.WriteAttributeString(XacmlConstants.AttributeNames.DataType, attr.DataType.ToString());
if (!string.IsNullOrEmpty(attr.Issuer))
{
writer.WriteAttributeString(XacmlConstants.AttributeNames.Issuer, attr.Issuer);
}
if (attr.IssueInstant != null)
{
writer.WriteAttributeString(XacmlConstants.AttributeNames.IssueInstant, attr.IssueInstant.ToString());
}
if (attr.AttributeValues.Count > 1)
{
throw new InvalidOperationException("AttributeValues shoul be 1 in version 1.0");
}
this.WriteContextAttributeValue(writer, attr.AttributeValues.First());
writer.WriteEndElement();
}
