Enforce limitations regarding beans of different scopes

[GoogleCodeExporter]

Issue 190 specifies requirement for support for other Spring bean scopes.

However, until this is place, the limitations should be better enforced
- beans must be singletons
- factory beans must be singletons (check this)

Original issue reported on code.google.com by philzoio...@googlemail.com on 2 May 2009 at 5:47

[GoogleCodeExporter]

Issue 190 will be fixed in this release, so this is less critical. However,
restrictions include:

- auto-export (NamedServiceAutoExportPostProcessor) does not apply to 
non-singletons
(ie at bean level or non-singleton factory beans) - r4003
- service registry list and maps also do not apply for the above - r4002
- same applies for filter based imported beans

However for standard beans imported via name or type, any non-singleton bean 
type can
be imported. 

Original comment by philzoio...@googlemail.com on 7 May 2009 at 9:32

• Changed state: Fixed