/// <summary>
/// Reads the advice expression.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns></returns>
/// <exception cref="XacmlSerializationException">Wrong XacmlEffectType value</exception>
protected virtual XacmlAdviceExpression ReadAdviceExpression(XmlReader reader) {
Contract.Requires<ArgumentNullException>(reader != null, "reader");
Contract.Requires<XmlException>(reader.IsStartElement(XacmlConstants.ElementNames.AdviceExpression, this.version.NamespacePolicy));
string appliesTo = this.ReadAttribute<string>(reader, XacmlConstants.AttributeNames.AppliesTo);
XacmlEffectType effectType = XacmlEffectType.Deny;
if (string.Equals(appliesTo, "Deny", StringComparison.OrdinalIgnoreCase)) {
effectType = XacmlEffectType.Deny;
}
else if (string.Equals(appliesTo, "Permit", StringComparison.OrdinalIgnoreCase)) {
effectType = XacmlEffectType.Permit;
}
else {
throw Diagnostic.DiagnosticTools.ExceptionUtil.ThrowHelperError(new XacmlSerializationException("Wrong XacmlEffectType value"));
}
XacmlAdviceExpression result = new XacmlAdviceExpression(
this.ReadAttribute<Uri>(reader, XacmlConstants.AttributeNames.AdviceId),
effectType
);
reader.ReadStartElement(XacmlConstants.ElementNames.AdviceExpression, this.version.NamespacePolicy);
this.ReadList<XacmlAttributeAssignmentExpression>(result.AttributeAssignmentExpressions, XacmlConstants.ElementNames.AttributeAssignmentExpression, this.version.NamespacePolicy, this.ReadAttributeAssignmentExpression, reader, isRequired: false);
reader.ReadEndElement();
return result;
}
/// <summary>
/// Writes the advice expression.
/// </summary>
/// <param name="writer">The writer.</param>
/// <param name="data">The data.</param>
protected virtual void WriteAdviceExpression(XmlWriter writer, XacmlAdviceExpression data) {
Contract.Requires<ArgumentNullException>(writer != null);
Contract.Requires<ArgumentNullException>(data != null);
writer.WriteStartElement(XacmlConstants.Prefixes.Policy, XacmlConstants.ElementNames.AdviceExpression, this.version.NamespacePolicy);
writer.WriteAttributeString(XacmlConstants.AttributeNames.AdviceId, data.AdviceId.OriginalString);
writer.WriteAttributeString(XacmlConstants.AttributeNames.AppliesTo, data.AppliesTo.ToString());
foreach (XacmlAttributeAssignmentExpression expr in data.AttributeAssignmentExpressions) {
this.WriteAttributeAssignmentExpression(writer, expr);
}
writer.WriteEndElement();
}