GWILLIAMS / RDF-Trine-1.006 / lib / RDF / Trine / Error.pm 

            

              
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# RDF::Trine::Error
# -----------------------------------------------------------------------------
=head1 NAME
RDF::Trine::Error - Error classes for RDF::Trine
=head1 VERSION
This document describes RDF::Trine::Error version 1.006
=head1 SYNOPSIS
 use RDF::Trine::Error qw(:try);
=head1 DESCRIPTION
RDF::Trine::Error provides a class hierarchy of errors that other RDF::Trine
classes may throw using the L<Error|Error> API. See L<Error> for more
information.
=head1 REQUIRES
L<Error|Error>
=cut
package RDF::Trine::Error;
use strict;
use warnings;
no warnings 'redefine';
use Carp qw(carp croak confess);
use base qw(Error);
######################################################################
our ($VERSION);
BEGIN {
        $VERSION        = '1.006';
}
######################################################################
package RDF::Trine::Error::CompilationError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::QuerySyntaxError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::MethodInvocationError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::SerializationError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::DatabaseError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::ParserError;
use base qw(RDF::Trine::Error);
package RDF::Trine::Error::ParserError::Explainable;
use base qw(RDF::Trine::Error::ParserError);
use Module::Load::Conditional qw[can_load];
our $ANSI;
BEGIN {
        $ANSI   = can_load( modules => { 'Term::ANSIColor' => undef } );
}
sub _get_line {
        my $self        = shift;
        my $fh          = shift;
        my $line        = shift;
        my $buffer;
        do {
                $buffer = $fh->getline;
        } while (--$line);
        return $buffer;
}
package RDF::Trine::Error::ParserError::Tokenized;
use base qw(RDF::Trine::Error::ParserError::Explainable);
sub explain {
        my $self        = shift;
        my $fh          = shift;
        seek($fh, 0, 0);
        my $text        = $self->text;
        my $t           = $self->object;
        my $line        = $t->start_line;
        my $col         = $t->start_column;
        my $buffer      = $self->_get_line( $fh, $line );
        my $maxlen      = length($buffer) - $col;
        my $len         = 1;
        if ($t->line == $t->start_line) {
                $len    = ($t->column - $t->start_column);
        } else {
                $len    = $maxlen;
        }
         
        my $tabs        = ($buffer =~ tr/\t//);
        $buffer         =~ s/\t/    /g;
        $col            += 3 * $tabs;
         
        chomp($text);
         
        if ($RDF::Trine::Error::ParserError::Explainable::ANSI) {
                print STDERR Term::ANSIColor::color('red');
                print STDERR "$text:\n";
                print STDERR Term::ANSIColor::color('reset');
                print STDERR substr($buffer, 0, $col-1);
                print STDERR Term::ANSIColor::color('red');
                print STDERR substr($buffer, $col-1, $len);
                print STDERR Term::ANSIColor::color('reset');
                print STDERR substr($buffer, $col+$len-1);
                print STDERR " " x ($col-1);
                print STDERR Term::ANSIColor::color('blue');
                print STDERR "^";
                if ($len > 1) {
                        print STDERR ("~" x ($len-1));
                }
                print STDERR "\n";
                print STDERR Term::ANSIColor::color('reset');
        } else {
                print STDERR "$text:\n";
                print STDERR $buffer;
                print STDERR " " x ($col-1);
                print STDERR "^";
                if ($len > 1) {
                        print STDERR ("~" x ($len-1));
                }
                print STDERR "\n";
        }
}
package RDF::Trine::Error::ParserError::Positioned;
use base qw(RDF::Trine::Error::ParserError::Explainable);
sub explain {
        my $self        = shift;
        my $fh          = shift;
        seek($fh, 0, 0);
        my $text        = $self->text;
        my $pos         = $self->value;
        my ($line, $col)        = @$pos;
        my $buffer      = $self->_get_line( $fh, $line );
         
        my $tabs        = ($buffer =~ tr/\t//);
        $buffer         =~ s/\t/    /g;
        $col            += 3 * $tabs;
         
        chomp($text);
         
        if ($RDF::Trine::Error::ParserError::Explainable::ANSI) {
                print STDERR Term::ANSIColor::color('red');
                print STDERR "$text:\n";
                print STDERR Term::ANSIColor::color('reset');
                print STDERR $buffer;
                print STDERR Term::ANSIColor::color('red');
                print STDERR " " x ($col-1);
                print STDERR "^";
                print STDERR Term::ANSIColor::color('reset');
                print STDERR "\n";
        } else {
                print STDERR "$text:\n";
                print STDERR $buffer;
                print STDERR " " x ($col-1);
                print STDERR "^";
                print STDERR "\n";
        }
}
package RDF::Trine::Error::UnimplementedError;
use base qw(RDF::Trine::Error);
1;
__END__
=head1 BUGS
Please report any bugs or feature requests to through the GitHub web interface
at L<https://github.com/kasei/perlrdf/issues>.
=head1 AUTHOR
Gregory Todd Williams  C<< <gwilliams@cpan.org> >>
=head1 COPYRIGHT
Copyright (c) 2006-2012 Gregory Todd Williams. This
program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut