3 TestObject - An implementation of TestInterface
7 This module attempts to provide an implementation of TestInterface and
8 is used for illustrating exception throwing using Graham Barr's
13 Steve Chervitz E<lt>sac@bioperl.orgE<gt>
24 # Define a special type of error "Bio::TestException" as a subclass of Error.
26 # 1. The ISA declaration effectively defines our new Exception object.
27 # 2. This declaration doesn't have to be located in the Bio directory.
28 # 3. We don't have to use Bio::Root::Exception in this module.
29 # 4. If Error.pm isn't available this statement doesn't matter.
30 @Bio::TestException
::ISA
= qw( Bio::Root::Exception );
32 use base
qw(Bio::Root::Root TestInterface);
35 # Note that we're not implementing foo(), so calling it
36 # will result in a Bio::Root::NotImplemented exception.
39 my ($self, $data) = @_;
40 print "Setting test data ($data)\n" if $data && $self->verbose;
41 $self->{'data'} = $data if $data;
43 return $self->{'data'}
50 print "\nExecuting method bar() in TestObject\n" if $self->verbose;
51 print "Throwing a Bio::TestException\n" if $self->verbose;
53 my $message = "A Test error";
55 # Bio::Root::Root::throw() will make use of Error.pm if present.
56 # The type of Error is specified with a -class parameter.
57 # If -class is not supplied, a Bio::Root::Exception is throw.
58 # In this case, the argument can consist of a simple string.
60 $self->throw( -class => 'Bio::TestException',
63 print "Code within bar() below the throw that shouldn't be executed.\n" if $self->verbose;