protected T ReadOptional <T>(string elementName, string elementNamespace, ReadElement <T> readFunction, XmlReader reader)
{
if (elementName == null)
{
throw new ArgumentNullException(nameof(elementName));
}
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (readFunction == null)
{
throw new ArgumentNullException(nameof(readFunction));
}
if (!reader.IsStartElement(elementName, elementNamespace))
{
return(default(T));
}
else
{
T result = readFunction.Invoke(reader);
return(result);
}
}
protected T1 ReadOptionalAbstract <T1, T2>(string elementName, string elementNamespace, ReadElement <T2> readFunction, XmlReader reader)
where T1 : T2
{
if (elementName == null)
{
throw new ArgumentNullException(nameof(elementName));
}
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (readFunction == null)
{
throw new ArgumentNullException(nameof(readFunction));
}
if (!reader.IsStartElement(elementName, elementNamespace))
{
return((T1)default(T2));
}
else
{
T1 result = (T1)readFunction.Invoke(reader);
return(result);
}
}
protected T ReadRequired <T>(string elementName, string elementNamespace, ReadElement <T> readFunction, XmlReader reader)
{
if (elementName == null)
{
throw new ArgumentNullException(nameof(elementName));
}
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (readFunction == null)
{
throw new ArgumentNullException(nameof(readFunction));
}
if (!reader.IsStartElement(XacmlConstants.ElementNames.ActionAttributeDesignator, this.Version.NamespacePolicy))
{
T result = readFunction.Invoke(reader);
return(result);
}
else
{
throw new XmlException(elementName + " is required");
}
}
