Grouper Developers Forum

["GW Brown, Information Systems and Computing" <>]

Hi Chris,

A couple of comments below.

Gary

--On 18 January 2008 01:20 -0500 Chris Hyzer 
<>
 wrote:

> Hey,
>
> I got clarification of some terms about grouper from Tom and Gary, and I
> updated the Javadoc on a bunch of classes and methods.  Here is the gist
> of what I learned.  Let me know if I should change anything and I am
> happy to do it.
>
> FYI.
>
> Kind regards,
>
> Chris
>
> Immediate member:
>
>    * An immediate member is directly assigned to a group.
>    * A composite group has no immediate members.  Note that
>    * a member can have an immediate membership and an effective
> membership.
'and potentially unlimited effective memberships'
> Effective member:
>
>    * An effective member has an indirect membership to a group
>    * (e.g. in a group within a group).  All subjects in a
>    * composite group are effective members (since the composite
>    * group has two groups and a set operator and no other immediate
>    * members).  Note that a member can have an immediate membership
>    * and an effective membership.
'group within a group' can be nested to any level so long as it does not 
become circular
'and potentially unlimited effective memberships'
> Composite member:
>
>    * A composite group has two groups as members and a set operator
There is potential for confusion here in the use of 'member'. A group can 
have  a single 'composite member' (which prevents any immediate members) - 
which is not defined in grouper_memberships, but in grouper_composites
>    * (e.g. union, intersection, etc).  A composite group has no immediate
> members.    * All subjects in a composite group are effective members.
>
> Member (i.e. group.getMember):
>
>    * All immediate subjects, and effective members are members.
>    * No duplicates will be returned (e.g. if immediate and effective).
>
> Membership:
>
>    * A membership is the object which represents a join of member
>    * and group.  Has metadata like type and creator.
and, if an effective membership, the parent membership
>



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GW Brown, Information Systems and Computing