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.\" ========================================================================
.\"
.IX Title "Net::Jabber::Data 3pm"
.TH Net::Jabber::Data 3pm "2004-08-17" "perl v5.18.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Net::Jabber::Data \- Jabber Data Library
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\&  Net::Jabber::Data is a companion to the Net::Jabber::XDB module. It
\&  provides the user a simple interface to set and retrieve all
\&  parts of a Jabber XDB Data.
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.Vb 3
\&  Net::Jabber::Data differs from the other modules in that its behavior
\&  and available functions are based off of the XML namespace that is
\&  set in it.  The current list of supported namespaces is:
\&
\&    jabber:iq:auth
\&    jabber:iq:auth:0k
\&    jabber:iq:register
\&    jabber:iq:roster
\&
\&  For more information on what these namespaces are for, visit 
\&  http://www.jabber.org and browse the Jabber Programmers Guide.
\&
\&  Each of these namespaces provide Net::Jabber::Data with the functions
\&  to access the data.  By using the AUTOLOAD function the functions for
\&  each namespace is used when that namespace is active.
\&
\&  To access a Data object you must create an XDB object and use the
\&  access functions there to get to the Data.  To initialize the XDB with
\&  a Jabber <xdb/> you must pass it the XML::Stream hash from the
\&  Net::Jabber::Client module.
\&
\&    my $xdb = new Net::Jabber::XDB(%hash);
\&
\&  There has been a change from the old way of handling the callbacks.
\&  You no longer have to do the above yourself, a Net::Jabber::XDB
\&  object is passed to the callback function for the message.  Also,
\&  the first argument to the callback functions is the session ID from
\&  XML::Streams.  There are some cases where you might want this
\&  information, like if you created a Client that connects to two servers
\&  at once, or for writing a mini server.
\&
\&    use Net::Jabber qw(Client);
\&
\&    sub xdbCB {
\&      my ($sid,$XDB) = @_;
\&      my $data = $XDB\->GetData();
\&      .
\&      .
\&      .
\&    }
\&
\&  You now have access to all of the retrieval functions available for
\&  that namespace.
\&
\&  To create a new xdb to send to the server:
\&
\&    use Net::Jabber;
\&
\&    my $xdb = new Net::Jabber::XDB();
\&    $data = $xdb\->NewData("jabber:iq:auth");
\&
\&  Now you can call the creation functions for the Data as defined in the
\&  proper namespaces.  See below for the general <data/> functions, and
\&  in each data module for those functions.
\&
\&  For more information about the array format being passed to the
\&  CallBack please read the Net::Jabber::Client documentation.
.Ve
.SH "METHODS"
.IX Header "METHODS"
.SS "Retrieval functions"
.IX Subsection "Retrieval functions"
.Vb 2
\&  GetXMLNS() \- returns a string with the namespace of the data that
\&               the <xdb/> contains.
\&
\&               $xmlns  = $XDB\->GetXMLNS();
\&
\&  GetData() \- since the behavior of this module depends on the
\&               namespace, a Data object may contain Data objects.
\&               This helps to leverage code reuse by making children
\&               behave in the same manner.  More than likely this
\&               function will never be called.
\&
\&               @data = GetData()
.Ve
.SS "Creation functions"
.IX Subsection "Creation functions"
.Vb 1
\&  SetXMLNS(string) \- sets the xmlns of the <data/> to the string.
\&
\&                     $data\->SetXMLNS("jabber:xdb:roster");
.Ve
.PP
In an effort to make maintaining this document easier, I am not going
to go into full detail on each of these functions.  Rather I will
present the functions in a list with a type in the first column to
show what they return, or take as arugments.  Here is the list of
types I will use:
.PP
.Vb 10
\&  string  \- just a string
\&  array   \- array of strings
\&  flag    \- this means that the specified child exists in the
\&            XML <child/> and acts like a flag.  get will return
\&            0 or 1.
\&  JID     \- either a string or Net::Jabber::JID object.
\&  objects \- creates new objects, or returns an array of
\&            objects.
\&  special \- this is a special case kind of function.  Usually
\&            just by calling Set() with no arguments it will
\&            default the value to a special value, like OS or time.
\&            Sometimes it will modify the value you set, like
\&            in jabber:xdb:version SetVersion() the function
\&            adds on the Net::Jabber version to the string
\&            just for advertisement purposes. =)
\&  master  \- this desribes a function that behaves like the
\&            SetMessage() function in Net::Jabber::Message.
\&            It takes a hash and sets all of the values defined,
\&            and the Set returns a hash with the values that
\&            are defined in the object.
.Ve
.SH "jabber:iq:"
.IX Header "jabber:iq:"
.Vb 2
\&  Type     Get               Set               Defined
\&  =======  ================  ================  ==================
.Ve
.SH "jabber:iq:"
.IX Header "jabber:iq:"
.Vb 2
\&  Type     Get               Set               Defined
\&  =======  ================  ================  ==================
.Ve
.SH "jabber:iq:"
.IX Header "jabber:iq:"
.Vb 2
\&  Type     Get               Set               Defined
\&  =======  ================  ================  ==================
.Ve
.SH "jabber:iq:"
.IX Header "jabber:iq:"
.Vb 2
\&  Type     Get               Set               Defined
\&  =======  ================  ================  ==================
.Ve
.SH "jabber:iq:"
.IX Header "jabber:iq:"
.Vb 2
\&  Type     Get               Set               Defined
\&  =======  ================  ================  ==================
.Ve
.SH "CUSTOM NAMESPACES"
.IX Header "CUSTOM NAMESPACES"
.Vb 3
\&  Part of the flexability of this module is that you can define your own
\&  namespace.  For more information on this topic, please read the
\&  Net::Jabber::Namespaces man page.
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
By Ryan Eatmon in May of 2001 for http://jabber.org..
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
This module is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.