Class Config

src/Config.java:51–387

A configuration class that stores key/value pairs as strings similar to the System properties object. The class includes helper methods to parse the strings into numbers or booleans and it allows for loading a standard Java properties file from disk. The loadSystemAndDefaults will be called

 * @since 1.7.0
 */
public class Config {
  private static final Logger LOG = LoggerFactory.getLogger(Config.class);

  /** Flag to determine if we're running under Windows or not */
  public static final boolean RUNNING_WINDOWS;
  static {
    // this should never be null, but who knows?
    RUNNING_WINDOWS = System.getProperty("os.name") != null ? System
        .getProperty("os.name").contains("Windows") : false;
  }
  
  /**
   * The list of properties configured to their defaults or modified by users.
   * We use a non-synchronized hash map for fast access as opposed to the
   * HashTable backed properties objects.
   */
  protected final HashMap<String, String> properties = new HashMap<String, String>();

  /** Holds default values for the config */
  protected final HashMap<String, String> default_map = new HashMap<String, String>();

  /** Tracks the location of the file that was actually loaded */
  protected String config_location;

  /**
   * Constructor that initializes default configuration values from the
   * System.properties map.
   */
  public Config() {
    loadSystemAndDefaults();
  }

  /**
   * Constructor that initializes default values and attempts to load the given
   * properties file
   * @param file Path to the file to load
   * @throws IOException Thrown if unable to read or parse the file
   */
  public Config(final String file) throws IOException {
    loadSystemAndDefaults();
    loadConfig(file);
  }

  /**
   * Constructor for subclasses who want a copy of the parent config but without
   * the ability to modify the original values.
   * 
   * This constructor will not re-read the file, but it will copy the location
   * so if a child wants to reload the properties periodically, they may do so
   * @param parent Parent configuration object to load from
   */
  public Config(final Config parent) {
    properties.putAll(parent.properties);
    config_location = parent.config_location;
    loadSystemAndDefaults();
  }

  /**