static RelDataType deduceRowType()

in src/main/java/net/hydromatic/optiq/impl/csv/CsvTable.java [109:157]
47 lines of code
9 McCabe index (conditional complexity)

  static RelDataType deduceRowType(JavaTypeFactory typeFactory, File file,
      List<CsvFieldType> fieldTypes) {
    final List<RelDataType> types = new ArrayList<RelDataType>();
    final List<String> names = new ArrayList<String>();
    CSVReader reader = null;
    try {
      reader = new CSVReader(new FileReader(file));
      final String[] strings = reader.readNext();
      for (String string : strings) {
        final String name;
        final CsvFieldType fieldType;
        final int colon = string.indexOf(':');
        if (colon >= 0) {
          name = string.substring(0, colon);
          String typeString = string.substring(colon + 1);
          fieldType = CsvFieldType.of(typeString);
        } else {
          name = string;
          fieldType = null;
        }
        final RelDataType type;
        if (fieldType == null) {
          type = typeFactory.createJavaType(String.class);
        } else {
          type = fieldType.toType(typeFactory);
        }
        names.add(name);
        types.add(type);
        if (fieldTypes != null) {
          fieldTypes.add(fieldType);
        }
      }
    } catch (IOException e) {
      // ignore
    } finally {
      if (reader != null) {
        try {
          reader.close();
        } catch (IOException e) {
          // ignore
        }
      }
    }
    if (names.isEmpty()) {
      names.add("line");
      types.add(typeFactory.createJavaType(String.class));
    }
    return typeFactory.createStructType(Pair.zip(names, types));
  }