Source code for aries_cloudagent.config.settings

"""Settings implementation."""

from typing import Mapping

from .base import BaseSettings

[docs]class Settings(BaseSettings): """Mutable settings implementation.""" def __init__(self, values: Mapping[str, object] = None): """Initialize a Settings object. Args: values: An optional dictionary of settings """ self._values = {} if values: self._values.update(values)
[docs] def get_value(self, *var_names, default=None): """Fetch a setting. Args: var_names: A list of variable name alternatives default: The default value to return if none are defined """ for k in var_names: if k in self._values: return self._values[k] return default
[docs] def set_value(self, var_name: str, value): """Add a setting. Args: var_name: The name of the setting value: The value to assign """ if not isinstance(var_name, str): raise TypeError("Setting name must be a string") if not var_name: raise ValueError("Setting name must be non-empty") self._values[var_name] = value
[docs] def set_default(self, var_name: str, value): """Add a setting if not currently defined. Args: var_name: The name of the setting value: The value to assign """ if var_name not in self: self.set_value(var_name, value)
[docs] def clear_value(self, var_name: str): """Remove a setting. Args: var_name: The name of the setting """ if var_name in self._values: del self._values[var_name]
def __contains__(self, index): """Define 'in' operator.""" return index in self._values def __iter__(self): """Iterate settings keys.""" return iter(self._values) def __setitem__(self, index, value): """Implement update operator for array index.""" self.set_value(index, value) def __delitem__(self, index): """Implement del operator for array index.""" self.clear_value(index) def __len__(self): """Fetch the length of the mapping.""" return len(self._values) def __bool__(self): """Convert settings to a boolean.""" return True
[docs] def copy(self) -> BaseSettings: """Produce a copy of the settings instance.""" return Settings(self._values)
[docs] def extend(self, other: Mapping[str, object]) -> BaseSettings: """Merge another settings instance to produce a new instance.""" vals = self._values.copy() vals.update(other) return Settings(vals)