public void LoggingExample()
{
var expression = OPathExpression.Compile("StringArray[0].Length > Int");
var document = new OPathDocument {
{ "StringArray", new[] { "String" } }, { "Int", 0 }
};
var navigator = OPathNavigator.CreateNavigator(document);
var result = navigator.Evaluate(expression, OPathOptions.Defaults, null, Console.WriteLine);
Console.WriteLine(result);
}
public void HelloOPathNETExample()
{
var expression = OPathExpression.Compile("MyVariable = 'OPath.NET'");
var document = new OPathDocument {
{ "MyVariable", "OPath.NET" }
};
var navigator = OPathNavigator.CreateNavigator(document);
var result = navigator.Evaluate(expression);
Console.WriteLine(result);
}
public void CustomFunctionExample()
{
var expression = OPathExpression.Compile("my-prefix:my-function(String, Int)");
var document = new OPathDocument {
{ "String", "String" }, { "Int", 616 }
};
var navigator = OPathNavigator.CreateNavigator(document);
navigator.RegisterCustomFunction("my-prefix", "my-function",
args => string.Join(",", Array.ConvertAll(args, o => o + "")));
var result = navigator.Evaluate(expression);
Console.WriteLine(result);
}
public void TestOPathPerformance()
{
HiPerfTimer rawTimer = new HiPerfTimer();
rawTimer.Start();
for (int i = 0; i < EVALUATION_COUNT; i++)
{
OPathExpression opathExpression = OPathExpression.Compile(EXPRESSION);
OPathDocument opathDocument = new OPathDocument();
opathDocument.Add("listDictionary", m_ListDictionary);
OPathNavigator opathNavigator = OPathNavigator.CreateNavigator(opathDocument);
opathNavigator.Evaluate(opathExpression);
}
rawTimer.Stop();
Console.WriteLine("Uncompiled OPath performance {0} evaluations in {1:0.000} millis",
EVALUATION_COUNT, (rawTimer.Duration * 1000));
HiPerfTimer cachedTimer = new HiPerfTimer();
cachedTimer.Start();
OPathExpression cachedOPathExpression = OPathExpression.Compile(EXPRESSION);
for (int i = 0; i < EVALUATION_COUNT; i++)
{
OPathDocument opathDocument = new OPathDocument();
opathDocument.Add("listDictionary", m_ListDictionary);
OPathNavigator opathNavigator = OPathNavigator.CreateNavigator(opathDocument);
opathNavigator.Evaluate(cachedOPathExpression);
}
cachedTimer.Stop();
Console.WriteLine("Compiled OPath performance {0} evaluations in {1:0.000} millis",
EVALUATION_COUNT, (cachedTimer.Duration * 1000));
}
public void OPathOptionsExample()
{
var expression = OPathExpression.Compile("MyVariable.Length = 0");
var document = new OPathDocument {
{ "MyVariable", null }
};
var navigator = OPathNavigator.CreateNavigator(document);
try
{
var result = navigator.Evaluate(expression);
Console.WriteLine(result);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
var result = navigator.Evaluate(expression, OPathOptions.ReturnDefaultForNull);
Console.WriteLine(result);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
var result = navigator.Evaluate(expression, OPathOptions.ReturnDefaultForNull, 0);
Console.WriteLine(result);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}