DateFieldHandler.java 文件源码

@Override
public Date load(final PortletPreferences preferences, final String key, final String defaultValue) {
    final String value = preferences.getValue(key, defaultValue);
    if (value == null) {
        return null;
    }
    try {
        return parseValue(value);
    } catch (final ParseException e) {
        log.error("Could not parse date object " + key + " from preferences: " + value, e);
        if (!value.equals(defaultValue)) {
            // Try to return the default value
            try {
                return parseValue(defaultValue);
            } catch (final ParseException e2) {
                // Ignore - we already logged an exception
            }
        }
        return null;
    }
}