XAttributeLiteral AssignToValues(XAttributeList list, XAttribute definedAttribute, string value)
{
if (value != null)
{
XAttributeLiteral attr = (XAttributeLiteral)definedAttribute.Clone();
attr.Value = value;
list.AddToCollection(attr);
return(attr);
}
return(null);
}
/// <summary>
/// Derives a prototype for the given attribute. This prototype attribute
/// will be equal in all respects, expect for the value of the attribute.
/// This value will be set to a default value, depending on the specific type
/// of the given attribute.
/// </summary>
/// <returns>The derived prototype attribute.</returns>
/// <param name="instance">Attribute to derive prototype from.</param>
public static XAttribute DerivePrototype(XAttribute instance)
{
XAttribute prototype = (XAttribute)instance.Clone();
if (!(prototype is XAttributeList))
{
if (!(prototype is XAttributeContainer))
{
if (prototype is XAttributeLiteral)
{
((XAttributeLiteral)prototype).Value = "DEFAULT";
}
else if (prototype is XAttributeBoolean)
{
((XAttributeBoolean)prototype).Value = true;
}
else if (prototype is XAttributeContinuous)
{
((XAttributeContinuous)prototype).Value = 0.0D;
}
else if (prototype is XAttributeDiscrete)
{
((XAttributeDiscrete)prototype).Value = 0L;
}
else if (prototype is IXAttributeTimestamp)
{
((XAttributeTimestamp)prototype).ValueMillis = 0L;
}
else if (prototype is XAttributeID)
{
((XAttributeID)prototype).Value = XIDFactory.Instance.CreateId();
}
else
{
throw new InvalidOperationException("Unexpected attribute type!");
}
}
}
return(prototype);
}
