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lib/Crypt/RSA/Errorhandler.pm  view on Meta::CPAN

package Crypt::RSA::Errorhandler; 
use strict;
use warnings;

## Crypt::RSA::Errorhandler -- Base class that provides error 
##                             handling functionality.
##
## Copyright (c) 2001, Vipul Ved Prakash.  All rights reserved.
## This code is free software; you can redistribute it and/or modify
## it under the same terms as Perl itself.

sub new { 
    bless {}, shift
}


sub error { 
    my ($self, $errstr, @towipe) = @_;
    $$self{errstr} = "$errstr\n";
    for (@towipe) { 
        my $var = $_;
        if (ref($var) =~ /Crypt::RSA/) { 
            $var->DESTROY();
        } elsif (ref($var) eq "SCALAR") { 
            $$var = ""; 
        } elsif (ref($var) eq "ARRAY") { 
            @$var = ();
        } elsif (ref($var) eq "HASH") { 
            %$var = ();
        }
    }
    return;    
} 


sub errstr { 
    my $self = shift;
    return $$self{errstr};
}

sub errstrrst { 
    my $self = shift;
    $$self{errstr} = "";
}

1;


=head1 NAME

Crypt::RSA::Errorhandler - Error handling mechanism for Crypt::RSA.

=head1 SYNOPSIS

    package Foo;

    use Crypt::RSA::Errorhandler;
    @ISA = qw(Crypt::RSA::Errorhandler);
    
    sub alive { 
        ..
        ..
        return 
        $self->error ("Awake, awake! Ring the alarum bell. \
                       Murther and treason!", $dagger) 
            if $self->murdered($king);
    }


    package main; 

    use Foo;
    my $foo = new Foo;