Set::Groups - A set of groups.

  use Set::Groups ;

  # create a set of groups
  $groups = new Set::Groups ;

  # create a group MyGroup with a single member
  $groups->addOwnSingleTo("single1","MyGroup") ;

  # add a group member into MyGroup
  $groups->addOwnGroupTo("Member1Group","MyGroup") ; 

  # add a single members into the previous member group
  $groups->addOwnSingleTo("single2","Member1Group") ;

  # add a group member into the previous member group
  $groups->addOwnGroupTo("Member2Group","Member1Group") ; 

  # add a single members into the previous member group
  $groups->addOwnSingleTo("single3","Member2Group") ;

  # flatten the group MyGroup
  @singles = $groups->getSinglesOf("MyGroup") ; 
  @groups = $groups->getGroupsOf("MyGroup") ; 
  $present = $groups->isSingleOf("single3","MyGroup") ; 
  $present = $groups->isGroupOf("Member2Group","MyGroup") ; 

The Groups object implements a set of groups. Each group can own single members and group members. A group can be flattened, i.e. expansed until each of his members is a single one.

Create a new group set.

  my $groups = new Set::Groups

Set a debug level (0 or 1).

  $groups->setDebug(1) ;

Create a new empty group and add it into the set. A group is everything which can be a key of a hash. Returns 1 on success, 0 otherwise.

  $groups->newGroup("a_group") ;
  $groups->newGroup(1) ;

Delete a group from the set. Return 1 on success, 0 otherwise.

  $groups->deleteGroup("a_group") ;

Return the list of the groups present into the set.

  @groups = $groups->getGroups() ; 

Return the list of the cyclic groups (i.e. self-contained) present into the set.

  @groups = $groups->getGroups() ; 

Return the list of the acyclic groups (i.e. not self-contained) present into the set.

  @groups = $groups->getGroups() ; 

Check if a group is present into the set.

  $present = $groups->hasGroup("a_group") ;

Add a single member to a group. A single is everything which can be a key of a hash. If the group doesn't exist in the set, it is created. Return 1 on success, 0 otherwise.

  $groups->addOwnSingleTo("single","a_group") ;

Add a group member to a group. If the embedding group doesn't exist in the set, it is created. If the member group doesn't exist in the set, it is created as an empty group. Return 1 on success, 0 otherwise.

  $groups->addOwnGroupTo("group_member","a_group") ;

Remove an own single from a group. Return 1 on success, 0 otherwise.

  $groups->removeOwnSingleFrom("single","a_group") ;

Remove a group member from a group. Return 1 on success, 0 otherwise.

  $groups->removeOwnGroupFrom("a_member_group","a_group") ;

Check if a group is acyclic.

  $is_acyclic = $groups->isAcyclic("a_group") ;

Check if a single is an own member of a group.

  $present = $groups->isOwnSingleOf("single","a_group") ;

Check if a group is an own member of a group.

  $present = $groups->isOwnGroupOf("a_group_member","a_group") ;

Check if a single is a (own or not) member of a group.

  $present = $groups->isSingleOf("single","an_acyclic_group") ;

Warning - Calling this method with a cyclic group as argument gives a infinite recursion.

Check if a group is a (own or not) member of a group.

  $present = $groups->isGroupOf("a_group_member","an_acyclic_group") ;

Warning - Calling this method with a cyclic group as argument gives a infinite recursion.

Return the list of own singles of a group.

  @singles = $groups->getOwnSinglesOf("a_group") ;

Return the list of own groups of a group.

  @groups = $groups->getOwnGroupsOf("a_group") ;

Return the list of (own or not) singles of an acyclic group.

  @singles = $groups->getSinglesOf("an_acyclic_group") ;

Warning - Calling this method with a cyclic group as argument gives a infinite recursion.

Return the list of (own or not) groups of an acyclic group.

  @groups = $groups->getGroupsOf("an_acyclic_group") ;

Warning - Calling this method with a cyclic group as argument gives a infinite recursion.

Deprecated - Replaced by addOwnGroupTo.

Deprecated - Replaced by addOwnSingleTo.

Deprecated - Replaced by removeOwnGroupFrom.

Deprecated - Replaced by removeOwnSingleFrom.

Suppose a group file like :

	admin:root,adm
	team:piotr,lioudmila,adam,annette,jacquelin
	true-users:james,sophie,@team,mohammed
	everybody:@admin,operator,@true-users
	daemon:apache,smmsp,named,daemon
	virtual:nobody,halt,@daemon
	all:@everybody,@virtual

where @name means group name, then the following code :

	use Set::Groups ;

	$groups = new Set::Groups ;
	while(<>)
	{
	  ($group,$members) = /^(\S+):(.*)$/ ;
	  @members = split(/,/,$members) ;
	  for $member (@members)
	  {
	    if ($member=~/^@/)
	    {
	      $member=~s/^@// ;
	      $groups->addOwnGroupTo($member,$group) ;
	    }
	    else
	    {
	      $groups->addOwnSingleTo($member,$group) ;
	    }
	  }
	}
	die "some groups are cyclic" if scalar($groups->getCyclicGroups())>0 ;
	print "singles: ",join(', ',$groups->getSinglesOf("all")),"\n" ;
	print "groups: ",join(', ',$groups->getGroupsOf("all")),"\n" ;

gives :

	singles: apache, sophie, jacquelin, lioudmila, mohammed, smmsp, nobody, adm, annette, operator, james, named, adam, halt, root, daemon, piotr
	groups: admin, everybody, team, daemon, true-users, virtual

Please report any bugs or feature requests to bug-Set-Groups at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Set-Groups. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

You can find documentation for this module with the perldoc command.

    perldoc Set-Groups

You can also look for information at:

* AnnoCPAN: Annotated CPAN documentation

http://annocpan.org/dist/Set-Groups

* CPAN Ratings

http://cpanratings.perl.org/s/Set-Groups

* RT: CPAN's request tracker

http://rt.cpan.org/NoAuth/Bugs.html?Dist=Set-Groups

* Search CPAN

http://search.cpan.org/dist/Set-Groups

Copyright Jacquelin Charbonnel < jacquelin.charbonnel at math.cnrs.fr >

This software is governed by the CeCILL-C license under French law and abiding by the rules of distribution of free software. You can use, modify and/ or redistribute the software under the terms of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following URL "http://www.cecill.info".

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