Provided by: libuser-identity-perl_0.98-1_all 
NAME
User::Identity::Collection - base class for collecting roles of a user
INHERITANCE
User::Identity::Collection
is a User::Identity::Item
User::Identity::Collection is extended by
User::Identity::Collection::Emails
User::Identity::Collection::Locations
User::Identity::Collection::Systems
User::Identity::Collection::Users
SYNOPSIS
use User::Identity;
use User::Identity::Collection;
my $me = User::Identity->new(...);
my $set = User::Identity::Collection::Emails->new(...);
$me->addCollection($set);
# Simpler
use User::Identity;
my $me = User::Identity->new(...);
my $set = $me->addCollection(type => 'email', ...)
my $set = $me->addCollection('email', ...)
my @roles = $me->collection('email'); # list of collected items
my $coll = $me->collection('email'); # a User::Identity::Collection
my @roles = $coll->roles;
my @roles = @$coll; # same, by overloading
my $role = $me->collection('email')->find($coderef);
my $role = $me->collection('location')->find('work');
my $role = $me->find(location => 'work');
DESCRIPTION
The "User::Identity::Collection" object maintains a set user related objects. It helps
selecting these objects, which is partially common to all collections (for instance, each
object has a name so you can search on names), and sometimes specific to the extension of
this collection.
Currently imlemented extensions are
• people is a collection of users
• whereabouts are locations
• a mailinglist is a
collection of email addresses
• a network contains
groups of systems
Extends "DESCRIPTION" in User::Identity::Item.
OVERLOADED
overload: @{}
When the reference to a collection object is used as array-reference, it will be shown
as list of roles.
example:
my $locations = $ui->collection('location');
foreach my $loc (@$location) ...
print $location->[0];
overload: stringification
Returns the name of the collection and a sorted list of defined items.
example:
print "$collection\n"; # location: home, work
METHODS
Extends "METHODS" in User::Identity::Item.
Constructors
Extends "Constructors" in User::Identity::Item.
User::Identity::Collection->new( [$name], %options )
-Option --Defined in --Default
description User::Identity::Item undef
item_type <required>
name User::Identity::Item <required>
parent User::Identity::Item undef
roles undef
description => STRING
item_type => CLASS
The CLASS which is used to store the information for each of the maintained objects
within this collection.
name => STRING
parent => OBJECT
roles => ROLE|ARRAY
Immediately add some roles to this collection. In case of an ARRAY, each element of
the array is passed separately to addRole(). So, you may end-up with an ARRAY of
arrays each grouping a set of options to create a role.
Attributes
Extends "Attributes" in User::Identity::Item.
$obj->description()
Inherited, see "Attributes" in User::Identity::Item
$obj->itemType()
Returns the type of the items collected.
$obj->name( [$newname] )
Inherited, see "Attributes" in User::Identity::Item
$obj->roles()
Returns all defined roles within this collection. Be warned: the rules are returned
in random (hash) order.
Collections
Extends "Collections" in User::Identity::Item.
$obj->add($collection, $role)
Inherited, see "Collections" in User::Identity::Item
$obj->addCollection( $object | <[$type], %options> )
Inherited, see "Collections" in User::Identity::Item
$obj->collection($name)
Inherited, see "Collections" in User::Identity::Item
$obj->parent( [$parent] )
Inherited, see "Collections" in User::Identity::Item
$obj->removeCollection($object|$name)
Inherited, see "Collections" in User::Identity::Item
$obj->type()
User::Identity::Collection->type()
Inherited, see "Collections" in User::Identity::Item
$obj->user()
Inherited, see "Collections" in User::Identity::Item
Maintaining roles
$obj->addRole($role| <[$name],%options> | ARRAY)
Adds a new role to this collection. $role is an object of the right type (depends on
the extension of this module which type that is) or a list of %options which are used
to create such role. The options can also be passed as reference to an ARRAY. The
added role is returned.
example:
my $uicl = User::Identity::Collection::Locations->new;
my $uil = User::Identity::Location->new(home => ...);
$uicl->addRole($uil);
$uicl->addRole( home => address => 'street 32' );
$uicl->addRole( [home => address => 'street 32'] );
Easier
$ui = User::Identity;
$ui->add(location => 'home', address => 'street 32' );
$ui->add(location => [ 'home', address => 'street 32' ] );
$obj->removeRole($role|$name)
The deleted role is returned (if it existed).
$obj->renameRole( <$role|$oldname>, $newname )
Give the role a different name, and move it in the collection.
$obj->sorted()
Returns the roles sorted by name, alphabetically and case-sensitive.
Searching
Extends "Searching" in User::Identity::Item.
$obj->find($name|CODE|undef)
Find the object with the specified $name in this collection. With "undef", a randomly
selected role is returned.
When a code reference is specified, all collected roles are scanned one after the
other (in unknown order). For each role,
CODE->($object, $collection)
is called. When the CODE returns true, the role is selected. In list context, all
selected roles are returned. In scalar context, the first match is returned and the
scan is aborted immediately.
example:
my $emails = $ui->collection('emails');
$emails->find('work');
sub find_work($$) {
my ($mail, $emails) = @_;
$mail->location->name eq 'work';
}
my @at_work = $emails->find(\&find_work);
my @at_work = $ui->find(location => \&find_work);
my $any = $ui->find(location => undef );
DIAGNOSTICS
Error: $object is not a collection.
The first argument is an object, but not of a class which extends
User::Identity::Collection.
Error: Cannot create a $type to add this to my collection.
Some options are specified to create a $type object, which is native to this
collection. However, for some reason this failed.
Error: Cannot load collection module for $type ($class).
Either the specified $type does not exist, or that module named $class returns
compilation errors. If the type as specified in the warning is not the name of a
package, you specified a nickname which was not defined. Maybe you forgot the
'require' the package which defines the nickname.
Error: Cannot rename $name into $newname: already exists
Error: Cannot rename $name into $newname: doesn't exist
Error: Creation of a collection via $class failed.
The $class did compile, but it was not possible to create an object of that class
using the options you specified.
Error: Don't know what type of collection you want to add.
If you add a collection, it must either by a collection object or a list of options
which can be used to create a collection object. In the latter case, the type of
collection must be specified.
Warning: No collection $name
The collection with $name does not exist and can not be created.
Error: Wrong type of role for $collection: requires a $expect but got a $type
Each $collection groups sets of roles of one specific type ($expect). You cannot add
objects of a different $type.
SEE ALSO
This module is part of User-Identity distribution version 0.98, built on November 08,
2017.
Do not forget to read Mail::Box-Overview, Mail::Box-Cookbook, and Mail::Box-Index.
Examples are included in the Mail-Box distribution, directories 'examples' and 'scripts'.
Browseable manuals, papers, and other released material van be found at Website:
http://perl.overmeer.net/userid/
The central modules (in separate distributions) in the MailBox suite are: Mail::Message,
Mail::Box, Mail::Box::IMAP4, Mail::Box::POP3, Mail::Box::Parser::C, Mail::Box::Dbx
(unpublished), Mail::Transport, Object::Realize::Later, and User::Identity.
Please post questions or ideas to the author markov@cpan.org.
LICENSE
Copyrights 2003-2017 by [Mark Overmeer <markov@cpan.org>]. For other contributors see
Changes.
This program is free software; you can redistribute it and/or modify it under the Artistic
license. See http://dev.perl.org/licenses/artistic.html