private IDictionary <string, object> GetVariableValueDictionary(OPathExpression opathExpression,
OPathOptions opathOptions, object defaultValue, ValueLogger valueLogger)
{
IDictionary <string, object> variableValueDictionary = new Dictionary <string, object>();
foreach (OPathVariable opathVariable in opathExpression.Variables)
{
object sourceObject = GetSourceObject(opathVariable);
object variableValue = null;
try
{
variableValue =
EvaluateVariableReference(
sourceObject, opathVariable, opathOptions, defaultValue, valueLogger,
opathExpression.OPath);
}
catch (Exception ex)
{
throw new OPathException(string.Format(
"Exception occurred evaluating variable reference {0}: {1}",
opathVariable.GetReference(), ex.Message), ex);
}
variableValueDictionary.Add(opathVariable.XPathName, variableValue);
}
return(variableValueDictionary);
}
public object Evaluate(OPathExpression opathExpression, OPathOptions opathOptions,
object defaultValue)
{
object opathValue = Evaluate(opathExpression, opathOptions, defaultValue, null);
return(opathValue);
}
public static OPathExpression Compile(string opath)
{
OPathParseResult parseResult = OPathParser.Parse(opath);
string xpath = parseResult.GetXPath();
OPathVariable[] opathVariables = parseResult.GetVariables();
XPathExpression xpathExpression = null;
try
{
xpathExpression = XPathExpression.Compile(xpath);
}
catch (XPathException ex)
{
throw new OPathException(string.Format(
"An XPathException was thrown when compiling the expression '{0}': {1}",
xpath, ex.Message), ex);
}
OPathExpression opathExpression = new OPathExpression(opath, opathVariables, xpathExpression);
return(opathExpression);
}
public static object Evaluate(OPathDocument opathDocument, OPathExpression opathExpression)
{
OPathNavigator targetNavigator = CreateNavigator(opathDocument);
object opathValue = targetNavigator.Evaluate(opathExpression, OPathOptions.Defaults);
return(opathValue);
}
public static object Evaluate(OPathDocument opathDocument, OPathExpression opathExpression,
OPathOptions opathOptions, object defaultValue, ValueLogger valueLogger)
{
OPathNavigator targetNavigator = CreateNavigator(opathDocument);
object opathValue =
targetNavigator.Evaluate(opathExpression, opathOptions, defaultValue, valueLogger);
return(opathValue);
}
private object EvaluateSingleVariable(OPathExpression opathExpression, OPathOptions opathOptions,
object defaultValue, ValueLogger valueLogger)
{
OPathVariable opathVariable = opathExpression.Variables[0];
object sourceObject = GetSourceObject(opathVariable);
object variableValue =
EvaluateVariableReference(
sourceObject, opathVariable, opathOptions, defaultValue, valueLogger, opathExpression.OPath);
return(variableValue);
}
private object EvaluateOPathExpression(OPathExpression opathExpression, OPathOptions opathOptions,
object defaultValue, ValueLogger valueLogger)
{
XPathNavigator variableValueNavigator = (new XmlDocument()).CreateNavigator();
// Clone the XPath expression so we can set a context on it in a thread-safe manner
XPathExpression clonedXPathExpression = opathExpression.XPathExpression.Clone();
IDictionary <string, object> variableValueDictionary =
GetVariableValueDictionary(opathExpression, opathOptions, defaultValue, valueLogger);
clonedXPathExpression.SetContext(
new OPathXsltContext(variableValueDictionary, m_CustomFunctions, GetXPathValue));
object evaluatedExpression = variableValueNavigator.Evaluate(clonedXPathExpression);
return(evaluatedExpression);
}
public object Evaluate(OPathExpression opathExpression, OPathOptions opathOptions,
object defaultValue, ValueLogger valueLogger)
{
object evaluatedExpression;
if (m_OPathDocument == null)
{
m_OPathDocument = new OPathDocument();
}
if (opathExpression.IsSingleVariable())
{
evaluatedExpression =
EvaluateSingleVariable(opathExpression, opathOptions, defaultValue, valueLogger);
}
else
{
evaluatedExpression =
EvaluateOPathExpression(opathExpression, opathOptions, defaultValue, valueLogger);
}
return(evaluatedExpression);
}
public object Evaluate(OPathExpression opathExpression)
{
object opathValue = Evaluate(opathExpression, OPathOptions.Defaults);
return(opathValue);
}
