Method put

src/main/java/com/googlecode/aviator/utils/Env.java:482–496

Assign an value, if it's already in overrides, it will update it, otherwise set it to default map. @param key @param value @return previous value for key (from default map, if not present in overrides)

(final String key, final Object value)

   * @return previous value for key (from default map, if not present in overrides)
   */
  @Override
  public Object put(final String key, final Object value) {
    Object prior = null;
    Map<String, Object> overrides = getmOverrides(false);
    if (overrides.containsKey(key)) {
      prior = overrides.put(key, value);
    } else {
      if (this.mDefaults.containsKey(key)) {
        prior = this.mDefaults.put(key, value);
      } else {
        overrides.put(key, value);
      }
    }
    return prior;
  }

  /**
   * Add all key-value pairs from another map into the overrides map.