public JScriptAssertion(string expression, string[] assemblyNames, string[] imports)
{
if (string.IsNullOrEmpty(expression) ||
expression.TrimStart().Length == 0)
{
return;
}
ProcessDirectives(expression, ref assemblyNames, ref imports);
var engine = VsaEngine.CreateEngineAndGetGlobalScope(/* fast */ false,
assemblyNames ?? new string[0]).engine;
if (imports != null && imports.Length > 0)
{
foreach (var import in imports)
{
Import.JScriptImport(import, engine);
}
}
//
// We pick on of two expression evaluation strategies depending
// on the level of trust available. The full trust version is
// faster as it compiles the expression once into a JScript
// function and then simply invokes at the time it needs to
// evaluate the context. The partial trust strategy is slower
// as it compiles the expression each time an evaluation occurs
// using the JScript eval.
//
_evaluationStrategy = FullTrustEvaluationStrategy.IsApplicable() ? (EvaluationStrategy)
new FullTrustEvaluationStrategy(expression, engine) :
new PartialTrustEvaluationStrategy(expression, engine);
}
private object EvalJScript0(string src)
{
Evaluator.EvaluationStrategy ft = null;
if (false)
{
try
{
ft = new PartialTrustEvaluationStrategy(src, this, Evaluator.Evaluator.Engine);
object hndlr31 = ft.Eval(this);
if (hndlr31 != null)
{
return(hndlr31);
}
}
catch (Exception ex)
{
writeToLogWarn("ERROR PartialTrustEvaluationStrategy: " + ex);
}
}
try
{
ft = new FullTrustEvaluationStrategy(src, this, Evaluator.Evaluator.Engine);
try
{
object hndlr31 = ft.Eval(this);
if (hndlr31 != null)
{
return(hndlr31);
}
}
catch (Exception ex)
{
writeToLogWarn("ERROR FullTrustEvaluationStrategy: " + ex);
}
}
catch (Exception ex)
{
writeToLogWarn("ERROR FullTrustEvaluationStrategy: " + ex);
}
try
{
object hndlr31 = Evaluator.Evaluator.EvalJScript(src);
if (hndlr31 != null)
{
return(hndlr31);
}
}
catch (Exception ex)
{
writeToLogWarn("ERROR EvalJScript " + ex);
return("ERROR EvalJScript: " + ex.Message);
}
return(null);
}