/// <summary>
/// Evaluates this <see cref="Precondition"/> against the contents of the
/// indicated <see cref="NodeIndex"/>.
/// </summary>
/// <param name="nodeIndex">The <see cref="NodeIndex"/> of a <see cref="XmlDocument"/></param>
/// <param name="cache">A cache of previously evaluated precondition results.</param>
/// <returns>A <see cref="bool"/> value indicating the applicability of this
/// <see cref="Precondition"/> to the <see cref="XmlDocument"/>.</returns>
public override bool Evaluate(NodeIndex nodeIndex, Dictionary <Precondition, bool> cache)
{
if (nodeIndex.HasTypeInformation)
{
string ns = FpMLRuleSet.DetermineNamespace(nodeIndex);
foreach (string type in types)
{
XmlNodeList list = nodeIndex.GetElementsByType(ns, type);
if ((list != null) && (list.Count > 0))
{
return(true);
}
}
}
else
{
foreach (String element in elements)
{
XmlNodeList list = nodeIndex.GetElementsByName(element);
if ((list != null) && (list.Count > 0))
{
return(true);
}
}
}
return(false);
}
/// <summary>
/// Validates all the elements registered at construction using the
/// <see cref="NodeIndex"/> to locate them as quickly as possible.
/// </summary>
/// <param name="nodeIndex">The <see cref="NodeIndex"/> of the test document.</param>
/// <param name="errorHandler">The <see cref="ValidationErrorHandler"/> used to report issues.</param>
/// <returns><c>true</c> if the code values pass the checks, <c>false</c>
/// otherwise.</returns>
protected override bool Validate(NodeIndex nodeIndex, ValidationErrorHandler errorHandler)
{
if (nodeIndex.HasTypeInformation)
{
string ns = FpMLRuleSet.DetermineNamespace(nodeIndex);
return(Validate(
nodeIndex.GetElementsByType(ns, contextType),
nodeIndex.GetElementsByType(ns, targetType), errorHandler));
}
return(Validate(
nodeIndex.GetElementsByName(contextElements),
nodeIndex.GetElementsByName(targetElements), errorHandler));
}
/// <summary>
/// Returns a <see cref="XmlNodeList"/> containing all the elements
/// defined in the <see cref="NodeIndex"/> that match the context
/// specification.
/// </summary>
/// <param name="nodeIndex">A <see cref="NodeIndex"/> for the test document.</param>
/// <returns>A <see cref="XmlNodeList"/> containing all the matching
/// <see cref="XmlElement"/> instances, if any.</returns>
public XmlNodeList GetMatchingElements(NodeIndex nodeIndex)
{
return(nodeIndex.GetElementsByType(FpMLRuleSet.DetermineNamespace(nodeIndex), typeName));
}