private static JsValue ScalarToRawString(JsValue self2, JsValue[] args)
{
if (args.Length != 2)
{
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) may be called on with two parameters only");
}
JsValue firstParam = args[0];
if (firstParam.IsObject() == false || args[0].AsObject() is BlittableObjectInstance == false)
{
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) may be called with a document first parameter only");
}
JsValue secondParam = args[1];
if (args[1].IsObject() == false || secondParam.AsObject() is FunctionInstance == false)
{
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) must be called with a second lambda argument");
}
BlittableObjectInstance selfInstance = firstParam.AsObject() as BlittableObjectInstance;
FunctionInstance lambda = secondParam.AsObject() as FunctionInstance;
//TODO: expose this in Jint directly instead of reflection
var funcDeclField = typeof(ScriptFunctionInstance).GetField("_functionDeclaration", BindingFlags.Instance | BindingFlags.NonPublic);
var func = (IFunction)funcDeclField.GetValue(lambda);
var ret = func.Body.Body.As <ReturnStatement[]>();
if (ret.Length != 1)
{
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) lambda to field must contain a single return expression");
}
StaticMemberExpression staticMemberExpression = ret[0].Argument.As <StaticMemberExpression>();
var prop = staticMemberExpression.Property;
if (staticMemberExpression.Object is Identifier == false)
{
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) lambda to field must contain a single return expression of a single field");
}
var propName = prop.As <Identifier>().Name;
if (selfInstance.OwnValues.TryGetValue(propName, out var existingValue))
{
if (existingValue.Changed)
{
return(existingValue.Value);
}
}
var propertyIndex = selfInstance.Blittable.GetPropertyIndex(propName);
if (propertyIndex == -1)
{
return(new JsValue(new ObjectInstance(selfInstance.Engine)
{
Extensible = true
}));
}
BlittableJsonReaderObject.PropertyDetails propDetails = new BlittableJsonReaderObject.PropertyDetails();
selfInstance.Blittable.GetPropertyByIndex(propertyIndex, ref propDetails);
var value = propDetails.Value;
switch (propDetails.Token & BlittableJsonReaderBase.TypesMask)
{
case BlittableJsonToken.Null:
return(JsValue.Null);
case BlittableJsonToken.Boolean:
return(new JsValue((bool)propDetails.Value));
case BlittableJsonToken.Integer:
return(new JsValue(new ObjectWrapper(selfInstance.Engine, value)));
case BlittableJsonToken.LazyNumber:
return(new JsValue(new ObjectWrapper(selfInstance.Engine, value)));
case BlittableJsonToken.String:
return(new JsValue(new ObjectWrapper(selfInstance.Engine, value)));
case BlittableJsonToken.CompressedString:
return(new JsValue(new ObjectWrapper(selfInstance.Engine, value)));
default:
throw new InvalidOperationException("scalarToRawString(document, lambdaToField) lambda to field must return either raw numeric or raw string types");
}
}
public virtual void Visit(StaticMemberExpression expression, TContext context)
{
VisitExpression(expression.Object, context);
VisitExpression(expression.Property, context);
}
