Filter second selectOneChoice depending on choice in first selectOneChoice

I have JSP page Report_start.jsp. On this page found 3 selectOneChoice. 1 - Country, 2 - Archive, 3 - Fund.
First falling out list (country) is filled by class FillCountryComboBox, located in file FillCountryComboBox.java.
Second falling out list (archive) is filled by class FillArchiveComboBox, located in file FillArchiveComboBox.java.
Third falling out list (fund) is filled by class FillFundComboBox, located in file FillFundComboBox.java.
Data are found in views qCountry, qArchive, qFund. On event OnChange first selectOneChoice is fixed action "history.go(0)", since filling occurs at renovation of the page Report_start.jsp. Then me and it is necessary to hear, is chose some importance in list. When filling second falling out list it is necessary to take into account choice first, but when filling third falling out list it is necessary to take into account choice second.
The Question - as in class FillArchiveComboBox to hear what importance is chose in list selecOneChoice1 (country)?
I using JDeleloper 10.1.3, ADF BC, ADF Faces

Hi,
this example from Steve Muench has different background, but maybe will help you.
(Cascading Lists in JSF [10.1.3]) http://radio.weblogs.com/0118231/stories/2004/09/23/notYetDocumentedAdfSampleApplications.html#62

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