Method decodeArray

mapstructure.go:1155–1220

(name string, data interface{}, val reflect.Value)

}

func (d *Decoder) decodeArray(name string, data interface{}, val reflect.Value) error {
	dataVal := reflect.Indirect(reflect.ValueOf(data))
	dataValKind := dataVal.Kind()
	valType := val.Type()
	valElemType := valType.Elem()
	arrayType := reflect.ArrayOf(valType.Len(), valElemType)

	valArray := val

	if valArray.Interface() == reflect.Zero(valArray.Type()).Interface() || d.config.ZeroFields {
		// Check input type
		if dataValKind != reflect.Array && dataValKind != reflect.Slice {
			if d.config.WeaklyTypedInput {
				switch {
				// Empty maps turn into empty arrays
				case dataValKind == reflect.Map:
					if dataVal.Len() == 0 {
						val.Set(reflect.Zero(arrayType))
						return nil
					}

				// All other types we try to convert to the array type
				// and "lift" it into it. i.e. a string becomes a string array.
				default:
					// Just re-try this function with data as a slice.
					return d.decodeArray(name, []interface{}{data}, val)
				}
			}

			return fmt.Errorf(
				"'%s': source data must be an array or slice, got %s", name, dataValKind)

		}
		if dataVal.Len() > arrayType.Len() {
			return fmt.Errorf(
				"'%s': expected source data to have length less or equal to %d, got %d", name, arrayType.Len(), dataVal.Len())

		}

		// Make a new array to hold our result, same size as the original data.
		valArray = reflect.New(arrayType).Elem()
	}

	// Accumulate any errors
	errors := make([]string, 0)

	for i := 0; i < dataVal.Len(); i++ {
		currentData := dataVal.Index(i).Interface()
		currentField := valArray.Index(i)

		fieldName := name + "[" + strconv.Itoa(i) + "]"
		if err := d.decode(fieldName, currentData, currentField); err != nil {
			errors = appendErrors(errors, err)
		}
	}

	// Finally, set the value to the array we built up
	val.Set(valArray)