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- # -*- perl -*-
- #
- # Copyright (C) 2004-2006 Daniel P. Berrange
- #
- # This program is free software; You can redistribute it and/or modify
- # it under the same terms as Perl itself. Either:
- #
- # a) the GNU General Public License as published by the Free
- # Software Foundation; either version 2, or (at your option) any
- # later version,
- #
- # or
- #
- # b) the "Artistic License"
- #
- # The file "COPYING" distributed along with this file provides full
- # details of the terms and conditions of the two licenses.
-
- =pod
-
- =head1 NAME
-
- Net::DBus::Callback - a callback for receiving reactor events
-
- =head1 SYNOPSIS
-
- use Net::DBus::Callback;
-
- # Assume we have a 'terminal' object and its got a method
- # to be invoked everytime there is input on its terminal.
- #
- # To create a callback to invoke this method one might use
- my $cb = Net::DBus::Callback->new(object => $terminal,
- method => "handle_stdio");
-
-
- # Whatever is monitoring the stdio channel, would then
- # invoke the callback, perhaps passing in a parameter with
- # some 'interesting' data, such as number of bytes available
- $cb->invoke($nbytes)
-
- #... which results in a call to
- # $terminal->handle_stdio($nbytes)
-
- =head1 DESCRIPTION
-
- This module provides a simple container for storing details
- about a callback to be invoked at a later date. It is used
- when registering to receive events from the L<Net::DBus::Reactor>
- class
-
- =head1 METHODS
-
- =over 4
-
- =cut
-
- package Net::DBus::Callback;
-
- use 5.006;
- use strict;
- use warnings;
-
- =item my $cb = Net::DBus::Callback->new(method => $name, [args => \@args])
-
- Creates a new callback object, for invoking a plain old function. The C<method>
- parameter should be the fully qualified function name to invoke, including the
- package name. The optional C<args> parameter is an array reference of parameters
- to be pass to the callback, in addition to those passed into the C<invoke> method.
-
- =item my $cb = Net::DBus::Callback->new(object => $object, method => $name, [args => \@args])
-
- Creates a new callback object, for invoking a method on an object. The C<method>
- parameter should be the name of the method to invoke, while the C<object> parameter
- should be a blessed object on which the method will be invoked. The optional C<args>
- parameter is an array reference of parameters to be pass to the callback, in addition
- to those passed into the C<invoke> method.
-
- =cut
-
- sub new {
- my $proto = shift;
- my $class = ref($proto) || $proto;
- my %params = @_;
- my $self = {};
-
- $self->{object} = $params{object} ? $params{object} : undef;
- $self->{method} = $params{method} ? $params{method} : die "method parameter is required";
- $self->{args} = $params{args} ? $params{args} : [];
-
- bless $self, $class;
-
- return $self;
- }
-
- =item $cb->invoke(@args)
-
- Invokes the callback. The argument list passed to the callback
- is a combination of the arguments supplied in the callback
- constructor, followed by the arguments supplied in the C<invoke>
- method.
-
- =cut
-
- sub invoke {
- my $self = shift;
-
- if ($self->{object}) {
- my $obj = $self->{object};
- my $method = $self->{method};
-
- $obj->$method(@{$self->{args}}, @_);
- } else {
- my $method = $self->{method};
-
- &$method(@{$self->{args}}, @_);
- }
- }
-
- 1;
-
- __END__
-
- =back
-
- =head1 AUTHOR
-
- Daniel P. Berrange.
-
- =head1 COPYRIGHT
-
- Copyright (C) 2004-2006 Daniel P. Berrange
-
- =head1 SEE ALSO
-
- L<Net::DBus::Reactor>
-
- =cut
-
-