http://wenku.baidu.com/view/a9dbebc789eb172ded63b7f4.html
http://wenku.baidu.com/view/dde6eb040740be1e650e9aeb.html
https://forums.oracle.com/thread/2270724?start=0&tstart=0
https://forums.oracle.com/thread/643594
https://support.oracle.com/epmos/faces/DocumentDisplay?_afrLoop=275590934283536&id=434567.1&_afrWindowMode=0&_adf.ctrl-state=10435ui0o5_9