public ParseExpressionOutCome ParseExpression(string Expression)
{
var OutCome = new ParseExpressionOutCome();
OutCome.ExpressionString = Expression;
Hl7.FhirPath.FhirPathCompiler.DefaultSymbolTable.AddFhirExtensions();
FhirPathCompiler Compiler = new FhirPathCompiler();
try
{
OutCome.Expression = Compiler.Parse(Expression);
OutCome.PasreOk = true;
return(OutCome);
}
catch (Exception Exec)
{
OutCome.PasreOk = false;
OutCome.ErrorMessage = Exec.Message;
return(OutCome);
}
}
public CompiledExpressionOutCome GetCompiledExpression(Resource Resource, ParseExpressionOutCome ParseExpressionOutCome)
{
CompiledExpressionOutCome CompiledExpressionOutCome = new CompiledExpressionOutCome();
CompiledExpressionOutCome.ParseExpressionOutCome = ParseExpressionOutCome;
Hl7.FhirPath.FhirPathCompiler.DefaultSymbolTable.AddFhirExtensions();
FhirPathCompiler Compiler = new FhirPathCompiler();
var PocoNavigator = Resource.ToTypedElement();
//var PocoNavigator = new Hl7.Fhir.ElementModel.PocoNavigator(Resource);
try
{
CompiledExpressionOutCome.CompiledExpression = Compiler.Compile(ParseExpressionOutCome.ExpressionString);
}
catch (Exception ex)
{
CompiledExpressionOutCome.Ok = false;
CompiledExpressionOutCome.ErrorMessage = ex.Message;
return(CompiledExpressionOutCome);
}
if (CompiledExpressionOutCome.CompiledExpression != null)
{
try
{
var oFhirEvaluationContext = new Hl7.Fhir.FhirPath.FhirEvaluationContext(PocoNavigator);
oFhirEvaluationContext.ElementResolver = CustomFhirPathResolver.Resolver;
CompiledExpressionOutCome.Ok = CompiledExpressionOutCome.CompiledExpression.Predicate(PocoNavigator, oFhirEvaluationContext);
}
catch (System.Exception Exec)
{
CompiledExpressionOutCome.Ok = false;
CompiledExpressionOutCome.ErrorMessage = Exec.Message;
return(CompiledExpressionOutCome);
}
}
return(CompiledExpressionOutCome);
}