int prefixLength = _PROP_PREFIX.length();
// �v���p�e�B�ɐݒ肳�ꂽConnectionParameter�֘A�v���p�e�B��
// �������āA�O���[�v����Properties�Ƃ���groupMap�ɕۑ�����B
Config config = Config.getInstance();
Enumeration<?> names = config.propertyNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
if (!name.startsWith(_PROP_PREFIX))
continue;