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lib/Algorithm/ConstructDFA2.pm  view on Meta::CPAN

    JSON->new->canonical(1)->indent(0)->ascii(1)
  },
);

sub BUILD {
  my ($self) = @_;

  ###################################################################
  # Create dbh

  $self->_log->debug("Creating database");

  my $dbh = DBI->connect( $self->storage_dsn );
  $dbh->{RaiseError} = 1;
#  $dbh->{AutoCommit} = 1;

  $self->_set_dbh( $dbh );

  ###################################################################
  # Register Extension functions

  $self->_log->debug("Register extension functions");

  $self->_dbh->sqlite_create_function( '_vertex_matches', 2, sub {
    return !! $self->vertex_matches->(@_);
  });

  $self->_dbh->sqlite_create_function( '_vertex_nullable', 1, sub {
    return !! $self->vertex_nullable->(@_);
  });

  $self->_dbh->sqlite_create_function( '_canonical', 1, sub {
    # Since SQLite's json_group_array does not guarantee ordering,
    # we sort the items in the list ourselves here.
    my @vertices = $self->_vertex_str_to_vertices(@_);
    return $self->_vertex_str_from_vertices(@vertices);
  });

  ###################################################################
  # Deploy schema

  $self->_log->debug("Deploying schema");
  $self->_deploy_schema();

  ###################################################################
  # Insert input data

  $self->_log->debug("Initialising input");
  $self->_init_input;

  $self->_log->debug("Initialising vertices");
  $self->_init_vertices;

  $self->_log->debug("Initialising edges");
  $self->_init_edges;

  ###################################################################
  # Insert pre-computed data

  $self->_log->debug("Initialising match data");
  $self->_init_matches;

  $self->_log->debug("Computing epsilon closures");
  $self->_init_epsilon_closure;

  ###################################################################
  # Let DB analyze data so far

  $self->_log->debug("Updating DB statistics");
  $self->_dbh->do('ANALYZE');

  # FIXME: strictly speaking, the dead state is a ombination of all
  # vertices from which an accepting combination of vertices cannot
  # be reached. That might be important. Perhaps when later merging
  # dead states, this would be resolved automatically? Probably not.

  my $dead_state_id = $self->find_or_create_state_id();
  $self->_set_dead_state_id($dead_state_id);
}