/// <summary>
/// Gets the comparison strategy for the current XML node.
/// </summary>
/// <param name="reader">The XML reader.</param>
private ObjectGraphComparisonStrategy GetStrategy(XmlReader reader)
{
ObjectGraphComparisonStrategy strategy = null;
if (reader.HasAttributes)
{
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
if (string.Equals(
reader.Name, ComparisonStrategyXmlAttribute,
StringComparison.OrdinalIgnoreCase))
{
if (strategy != null)
{
throw new XmlException("XML node can have only one comparison strategy attribute");
}
TryFindStrategy(reader.Value, out strategy);
}
}
reader.MoveToElement();
}
return(strategy);
}
/// <summary>
/// Tries to find the strategy by its name.
/// </summary>
private bool TryFindStrategy(string name, out ObjectGraphComparisonStrategy strategy)
{
Debug.Assert(name != null);
if (string.IsNullOrEmpty(name.Trim()))
{
throw new XmlException("Comparison strategy name is empty or whitespaces.");
}
if (!strategies.TryGetValue(name, out strategy))
{
if (ThrowExceptionOnUnknownComparisonStrategy)
{
throw new XmlException(
string.Format("Comparison strategy with an unknown name is found: {0}.", name));
}
return(false);
}
return(true);
}
/// <summary>
/// Gets the name of the strategy.
/// </summary>
private static string GetStrategyName(ObjectGraphComparisonStrategy strategy)
{
Debug.Assert(strategy != null);
return(strategy.GetType().Name);
}