@Override public Object retrieve(String field) { if (field == null) { return null; } else if (field.equals(ID)) { return getId(); } else if (field.equals(ENTITYID)) { return getEntityId(); } else if (field.equals(ENTITYTYPE)) { return getEntityType(); } else if (field.equals(LSID)) { return getLsid(); } else if (field.equals(UUID)) { return getUuid(); } else if (field.equals(DETAILS)) { return getDetails(); } else { if (_dynamicFields != null) { return _dynamicFields.get(field); } return null; } }