/// <summary>
/// Validates the component properties.
/// </summary>
/// <remarks>
/// Throws an exception if any of the properties is invalid.
/// </remarks>
protected override List <string> Validate()
{
List <string> errors = new List <string>();
if (this.XPathProperties == null || this.XPathProperties.Count == 0)
{
errors.Add(Resources.XPathPropertiesValidationMessage);
}
for (int i = 0; i < this.XPathProperties.Count; i++)
{
XPathProperty xpathProperty = this.XPathProperties[i];
if (string.IsNullOrEmpty(xpathProperty.Name) == true)
{
errors.Add(string.Format("Property {0} - Name cannot be empty.", i));
}
if (string.IsNullOrEmpty(xpathProperty.Namespace) == true)
{
errors.Add(string.Format("Property {0} - Namespace cannot be empty.", i));
}
if (string.IsNullOrEmpty(xpathProperty.XPath) == true)
{
errors.Add(string.Format("Property {0} - XPath expression cannot be empty.", i));
}
}
return(errors);
}
/// <summary>
/// Evaluates an xpath property.
/// </summary>
/// <param name="xpathProperty">XPathProperty instance.</param>
/// <param name="navigator">XPathNavigator instance.</param>
/// <returns>XPath expression result.</returns>
private object Evaluate(XPathProperty xpathProperty, XPathNavigator navigator)
{
object result = null;
// create an xpath expression
XPathExpression expression = XPathExpression.Compile(xpathProperty.XPath);
switch (expression.ReturnType)
{
case XPathResultType.String:
case XPathResultType.Number:
result = navigator.Evaluate(expression);
break;
case XPathResultType.NodeSet:
XPathNodeIterator ni = navigator.Select(expression);
if (ni.Count == 0 && this.RaiseXPathExceptions == true)
{
throw new ApplicationException(string.Format(Resources.XPathNodeNotFoundException, xpathProperty.XPath));
}
if (ni.Count > 1 && this.RaiseXPathExceptions == true)
{
throw new ApplicationException(string.Format(Resources.XPathMultipleResultsException, xpathProperty.XPath));
}
if (ni.Count == 1 && ni.MoveNext() == true)
{
result = ni.Current.ToString();
}
break;
case XPathResultType.Boolean:
result = (bool)navigator.Evaluate(expression);
break;
}
return(result);
}
public static StateBase ConvertXpathToStates(string xPath)
{
int len = xPath.Length;
StateBase state = null;
var levels = xPath.Split('.');
for (int i = 0; i < levels.Length; i++)
{
levels[i] = levels[i].Trim();
StateBase newState = null;
if (levels[i].Contains("/"))
{
newState = XPathProperty.Parser(levels[i]);
}
else
if (levels[i].Contains("("))
{
newState = MethodObject.Parser(levels[i]);
}
else
if (levels[i].Contains("["))
{
newState = ArrayListProperty.Parser(levels[i]);
}
else
{
newState = DirectProperty.Parser(levels[i]);
}
newState.Parent = state;
state = newState;
}
return(state);
//for (int i = 0; i < len; i++)
//{
// if(xPath[i]=='/' || i==0 )
// {
// int xPathStart = i;
// int xPathEnd = i;
// while (xPath[i] != '.' && i != len)
// {
// }
// xPathEnd = i-1;
// var value = xPath.Substring(xPathStart, xPathEnd- xPathStart);
// value = value.Trim('.', ' ');
// StateBase newState = new XPathProperty(value);
// }
// else
// {
// }
//}
}
