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User::Identity::Item(3User Contributed Perl DocumentaUser::Identity::Item(3pm)

       User::Identity::Item - general base class for User::Identity

       The "User::Identity::Item" base class is extended into useful modules:
       it has no use by its own.


       User::Identity::Item->new([NAME], OPTIONS)

        Option     --Default
        description  undef
        name         <required>
        parent       undef

           . description => STRING

               Free format description on the collected item.

           . name => STRING

               A simple name for this item.  Try to give a useful name in the
               context of the item time.  Each time when you lookup items, you
               need to specify this name, so it should be unique and not to
               hard to handle in your program.  For instance, when a person is
               addressed, you usually will give him/her this a nickname.

           . parent => OBJECT

               The encapsulating object: the object which collects this one.



           Free format description on this item.  Please do not add any sig-
           nificance to the content of this field: if you are in need for an
           extra attribute, please contact the author of the module to imple-
           ment it, or extend the object to suit your needs.


           The name of this item.  Names are unique within a collection... a
           second object with the same name within any collection will destroy
           the already existing object with that name.

           Changing the name of an item is quite dangerous.  You probably want
           to call User::Identity::Collection::renameRole() instead.


       $obj->add(COLLECTION, ROLE)

           The ROLE is added to the COLLECTION.  The COLLECTION is the name of
           a collection, which will be created automatically with addCollec-
           tion() if needed.  The COLLECTION can also be specified as existing
           collection object.

           The ROLE is anything what is acceptable to User::Identity::Collec-
           tion::addRole() of the collection at hand, and is returned.  ROLE
           typically is a list of parameters for one role, or a reference to
           an array containing these values.


            my $ui   = User::Identity->new(...);
            my $home = $ui->add(location => [home => street => '27 Roadstreet', ...] );
            my $work = $ui->add(location => work, tel => '+31-2231-342-13', ... );

            my $travel = User::Identity::Location->new(travel => ...);
            $ui->add(location => $travel);

            my $system = User::Identity::Collection::System->new(...);
            $ui->add($system => 'localhost');

       $obj->addCollection(OBJECT | ([TYPE], OPTIONS))

           Add a new collection of roles to an item.  This can be achieved in
           two ways: either create an User::Identity::Collection OBJECT your-
           self and then pass that to this method, or supply all the OPTIONS
           needed to create such an object and it will be created for you.
           The object which is added is returned, and can be used for many
           methods directly.

           For OPTIONS, see the specific type of collection.  Additional
           options are listed below.

            type    <required>

           . type => STRING|CLASS

               The nickname of a collection class or the CLASS name itself of
               the object to be created.  Required if an object has to be cre-
               ated.  Predefined type nicknames are "email", "system", and


            my $me   = User::Identity->new(...);
            my $locs = User::Identity::Collection::Locations->new();

            my $email = $me->addCollection(type => 'email');
            my $email = $me->addCollection('email');


           In scalar context the collection object with the NAME is returned.
           In list context, all the roles within the collection are returned.


            my @roles = $me->collection('email');        # list of collected items
            my @roles = $me->collection('email')->roles; # same of collected items
            my $coll  = $me->collection('email');        # a User::Identity::Collection

       $obj->find(COLLECTION, ROLE)

           Returns the object with the specified ROLE within the named collec-
           tion.  The collection can be specified as name or object.


            my $role  = $me->find(location => 'work');       # one location
            my $role  = $me->collection('location')->find('work'); # same

            my $email = $me->addCollection('email');
            $me->find($email => 'work');
            $email->find('work');   # same


           Returns the parent of an Item (the enclosing item).  This may
           return "undef" if the object is stand-alone.




           Returns a nice symbolic name for the type.


           Go from this object to its parent, to its parent, and so on, until
           a User::Identity is found or the top of the object tree has been


            print $email->user->fullName;

       Error: $object is not a collection.

           The first argument is an object, but not of a class which extends

       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: 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.

       Error: Each item requires a name

           You have to specify a name for each item.  These names need to be
           unique within one collection, but feel free to give the same name
           to an e-mail address and a location.

       Warning: No collection $name

           The collection with $name does not exist and can not be created.

       Warning: Unknown option $name for a $class

           One used option is not defined.  Check the manual page of the class
           to see which options are accepted.

       Warning: Unknown options @names for a $class

           More than one option is not defined.

       This module is part of User-Identity distribution version 0.92, built
       on July 25, 2007. Website: http://perl.overmeer.net/userid/

       Copyrights 2003,2004,2007 by Mark Overmeer <perlATovermeer.net>. For
       other contributors see Changes.

       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.  See

perl v5.8.8                       2008-02-28         User::Identity::Item(3pm)