/// <summary> /// </summary> protected abstract bool TryResolveValue(out object result, out NodeError error);
/// <summary>
/// </summary>
protected override bool TryResolveValue(out object value, out NodeError error)
{
bool result;
var valSchema = NodeSchema as ValueNodeSchema;
var rawVal = _rawVal;
if (valSchema == null)
{
value = rawVal;
error = default(NodeError);
result = true;
}
else
{
try
{
var dataType = valSchema.DataType;
if (rawVal == null || Equals(rawVal, "") || valSchema.IsReadOnly)
{
if (valSchema.IsComputed())
{
value = this.Evaluate<object>(valSchema.Default);
}
else
{
if (!String.IsNullOrWhiteSpace(valSchema.Default))
{
value = dataType == DataType.String
? valSchema.Default
: Parsers.ParseString(valSchema.Default, valSchema, Context);
}
else
{
value = dataType.GetDefaultValue();
}
}
}
else
{
value = dataType == DataType.String
? rawVal
: Parsers.ParseObject(rawVal, valSchema, Context);
//TODO:if the schema is still Evaluatable, compare the input val and the evaluated val, put in a warning if they don't match up
}
error = default(NodeError);
result = true;
}
catch (FormatException)
{
result = false;
value = NodeSchema.DataType.GetDefaultValue();
error = new NodeError
{
Message = "The input value was in an incorrect format",
Type = ValidationType.Format
};
}
catch (OverflowException)
{
result = false;
value = NodeSchema.DataType.GetDefaultValue();
error = new NodeError
{
Message = "The input value was too big or too small for data type: " + NodeSchema.DataType,
Type = ValidationType.Format
};
}
catch (EvaluationException evalEx)
{
result = false;
value = NodeSchema.DataType.GetDefaultValue();
error = new NodeError
{
Message = "Could not evaluate the formula: {0}, ERROR: {1}".FormatWith(NodeSchema.Default, evalEx.Message),
Type = ValidationType.Evaluation
};
}
catch (KeyNotFoundException kEx)
{
result = false;
value = NodeSchema.DataType.GetDefaultValue();
error = new NodeError
{
Message = "Could not evaluate the formula: {0}, missing variable: {1}".FormatWith(NodeSchema.Default, kEx.Data["name"]),
Type = ValidationType.Evaluation
};
}
}
return result;
}