setStringToAttribute method

@override bool setStringToAttribute(String name, String string)

Helper to parse a string and update the attribute name accordingly. If the attribute type is recognized (e.g., int, bool), we parse the string. Otherwise, store the string as-is.

Implementation

@override
bool setStringToAttribute(String name, String string) {
  if (_concept == null) {
    throw ConceptException('Entity concept is not defined.');
  }

  Attribute? attribute =
      _concept?.attributes.singleWhereCode(name) as Attribute?;
  if (attribute == null) {
    String msg = '${_concept?.code}.$name is not correct attribute name.';
    throw UpdateException(msg);
  }

  // If literal 'null', we interpret that as no value.
  if (string == 'null') {
    return setAttribute(name, null);
  }

  // Attempt to parse based on declared attribute type.
  if (attribute.type?.code == 'DateTime') {
    try {
      return setAttribute(name, DateTime.parse(string));
    } on ArgumentError catch (e) {
      throw TypeException('${_concept?.code}.${attribute.code} '
          'attribute value is not DateTime: $e');
    }
  } else if (attribute.type?.code == 'bool') {
    if (string == 'true') {
      return setAttribute(name, true);
    } else if (string == 'false') {
      return setAttribute(name, false);
    } else {
      throw TypeException('${attribute.code} attribute value is not bool.');
    }
  } else if (attribute.type?.code == 'int') {
    try {
      return setAttribute(name, int.parse(string));
    } on FormatException catch (e) {
      throw TypeException('${attribute.code} '
          'attribute value is not int: $e');
    }
  } else if (attribute.type?.code == 'double') {
    try {
      return setAttribute(name, double.parse(string));
    } on FormatException catch (e) {
      throw TypeException('${attribute.code} '
          'attribute value is not double: $e');
    }
  } else if (attribute.type?.code == 'num') {
    try {
      return setAttribute(name, int.parse(string));
    } on FormatException catch (e1) {
      try {
        return setAttribute(name, double.parse(string));
      } on FormatException catch (e2) {
        throw TypeException(
            '${attribute.code} attribute value is not num: $e1; $e2');
      }
    }
  } else if (attribute.type?.code == 'Uri') {
    try {
      return setAttribute(name, Uri.parse(string));
    } on ArgumentError catch (e) {
      throw TypeException('${attribute.code} attribute value is not Uri: $e');
    }
  } else {
    // For any other or custom type, store string as-is.
    return setAttribute(name, string);
  }
}