setProperty method

@override void setProperty(String name, Object? value)

Updates or adds a property (resets signature).

Modifying properties invalidates the existing signature (both isValid and the stored signature will be reset). A new signature must be generated with sign() after making changes.

name: Name of the property to update/add

value: New value for the property (may be null to remove)

Implementation

@override
void setProperty(String name, Object? value) {
  // 1. reset status
  assert(_status >= 0, 'status error: $this');
  _status = 0;
  // 2. update property value with name
  Map? dict = properties;
  if (dict == null) {
    assert(false, 'failed to get properties: $this');
  } else if (value == null) {
    dict.remove(name);
  } else {
    dict[name] = value;
  }
  // 3. clear data signature after properties changed
  remove('data');
  remove('signature');
  _json = null;
  _sig = null;
}