Java API to retrieve work sets assigned to a specific role in SAP EP 7.3

Is it possible using some Java API to retrieve work sets assigned to a specific role in SAP EP 7.3.

Similarly Is it possible using some Java API to retrieve pages assigned to a specific Work set in SAP EP 7.3.

Similarly Is it possible using some Java API to retrieve Iviews assigned to a specific portal Page in SAP EP 7.3.

If yes, which API and which JAR file to import to support the imports.

Following API can be used for this purpose.

IWDPageService pageService = (IWDPageService) WDPortalUtils.getService(WDPortalServiceType.PAGE_SERVICE);

More ideas welcome.

Keywords : SAP EP 7.3, SAP Web Dynpro java, java API