Net::LDAP::Control::VLUser Contributed Perl DocumentNet::LDAP::Control::VLV(3)NAMENet::LDAP::Control::VLV - LDAPv3 Virtual List View control object
SYNOPSIS
use Net::LDAP;
use Net::LDAP::Control::VLV;
use Net::LDAP::Constant qw( LDAP_CONTROL_VLVRESPONSE );
$ldap = Net::LDAP->new( "ldap.mydomain.eg" );
# Get the first 20 entries
$vlv = Net::LDAP::Control::VLV->new(
before => 0, # No entries from before target entry
after => 19, # 19 entries after target entry
content => 0, # List size unknown
offset => 1, # Target entry is the first
);
$sort = Net::LDAP::Control::Sort->new( order => 'cn' );
@args = ( base => "o=Ace Industry, c=us",
scope => "subtree",
filter => "(objectClass=inetOrgPerson)",
callback => \&process_entry, # Call this sub for each entry
control => [ $vlv, $sort ],
);
$mesg = $ldap->search( @args );
# Get VLV response control
($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;
$vlv->response( $resp );
# Set the control to get the last 20 entries
$vlv->end;
$mesg = $ldap->search( @args );
# Get VLV response control
($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;
$vlv->response( $resp );
# Now get the previous page
$vlv->scroll_page( -1 );
$mesg = $ldap->search( @args );
# Get VLV response control
($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;
$vlv->response( $resp );
# Now page with first entry starting with "B" in the middle
$vlv->before(9); # Change page to show 9 before
$vlv->after(10); # Change page to show 10 after
$vlv->assert("B"); # assert "B"
$mesg = $ldap->search( @args );
DESCRIPTION
"Net::LDAP::Control::VLV" provides an interface for the creation and
manipulation of objects that represent the Virtual List View as
described by draft-ietf-ldapext-ldapv3-vlv-09.txt.
When using a Virtual List View control in a search, it must be
accompanied by a sort control. See Net::LDAP::Control::Sort
CONSTRUCTOR ARGUMENTS
In addition to the constructor arguments described in
Net::LDAP::Control the following are provided.
after
Set the number of entries the server should return from the list
after the target entry.
assert
Set the assertion value user to locate the target entry. This value
should be a legal value to compare with the first attribute in the
sort control that is passed with the VLV control. The target entry
is the first entry in the list which is greater than or equal the
assert value.
before
Set the number of entries the server should return from the list
before the target entry.
content
Set the number of entries in the list. On the first search this
value should be set to zero. On subsequent searches it should be
set to the length of the list, as returned by the server in the
VLVResponse control.
context
Set the context identifier. On the first search this value should
be set to zero. On subsequent searches it should be set to the
context value returned by the server in the VLVResponse control.
offset
Set the offset of the target entry.
METHODS
As with Net::LDAP::Control each constructor argument described above is
also available as a method on the object which will return the current
value for the attribute if called without an argument, and set a new
value for the attribute if called with an argument.
The "offset" and "assert" attributes are mutually exclusive. Setting
one or the other will cause previous values set by the other to be
forgotten. The "content" attribute is also associated with the "offset"
attribute, so setting "assert" will cause any "content" value to be
forgotten.
end Set the target entry to the end of the list. This method will
change the "before" and "after" attributes so that the target entry
is the last in the page.
response VLV_RESPONSE
Set the attributes in the control as per VLV_RESPONSE. VLV_RESPONSE
should be a control of type Net::LDAP::Control::VLVResponse
returned from the server. "response" will populate the "context",
"offset" and "content" attibutes of the control with the values
from VLV_RESPONSE. Because this sets the "offset" attribute, any
previous setting of the "assert" attribute will be forgotten.
scroll NUM
Move the target entry by NUM entries. A positive NUM will move the
target entry towards the end of the list and a negative NUM will
move the target entry towards the start of the list. Returns the
index of the new target entry, or "undef" if the current target is
identified by an assertion.
"scroll" may change the "before" and "after" attributes if the
scroll value would cause the page to go off either end of the list.
But the page size will be maintained.
scroll_page NUM
Scroll by NUM pages. This method simple calculates the current page
size and calls "scroll" with "NUM * $page_size"
start
Set the target entry to the start of the list. This method will
change the "before" and "after" attributes to the the target entry
is the first entry in the page.
SEE ALSO
Net::LDAP, Net::LDAP::Control, Net::LDAP::Control::Sort,
Net::LDAP::Control::VLVResponse
AUTHOR
Graham Barr <gbarr@pobox.com>
Please report any bugs, or post any suggestions, to the perl-ldap
mailing list <perl-ldap@perl.org>
COPYRIGHT
Copyright (c) 2000-2004 Graham Barr. All rights reserved. This program
is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.
perl v5.18.1 2013-10-18 Net::LDAP::Control::VLV(3)
