package SQL::Translator;
-#-----------------------------------------------------
-# $Id: Translator.pm,v 1.3.2.1 2002-03-07 14:14:48 dlc Exp $
-#-----------------------------------------------------
-# Copyright (C) 2002 Ken Y. Clark <kycl4rk@users.sourceforge.net>,
-# darren chamberlain <darren@cpan.org>
+# ----------------------------------------------------------------------
+# $Id: Translator.pm,v 1.8 2002-07-08 14:42:56 dlc Exp $
+# ----------------------------------------------------------------------
+# Copyright (C) 2002 Ken Y. Clark <kycl4rk@users.sourceforge.net>,
+# darren chamberlain <darren@cpan.org>
#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; version 2.
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; version 2.
#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+# 02111-1307 USA
# -------------------------------------------------------------------
=head1 NAME
use SQL::Translator;
my $translator = SQL::Translator->new;
- my $output = $translator->translate(
- parser => 'mysql',
- producer => 'oracle',
- file => $file,
- ) or die $translator->error;
+
+ my $output = $translator->translate(
+ from => "MySQL",
+ to => "Oracle",
+ filename => $file,
+ ) or die $translator->error;
print $output;
=head1 DESCRIPTION
This module attempts to simplify the task of converting one database
-create syntax to another through the use of Parsers and Producers.
-The idea is that any Parser can be used with any Producer in the
-conversion process. So, if you wanted PostgreSQL-to-Oracle, you could
-just write the PostgreSQL parser and use an existing Oracle producer.
-
-Currently, the existing parsers use Parse::RecDescent, and the
-producers are just printing formatted output of the parsed data
-structure. New parsers don't necessarily have to use
-Parse::RecDescent, however, as long as the data structure conforms to
-what the producers are expecting. With this separation of code, it is
-hoped that developers will find it easy to add more database dialects
-by using what's written, writing only what they need, and then
-contributing their parsers or producers back to the project.
+create syntax to another through the use of Parsers (which understand
+the sourced format) and Producers (which understand the destination
+format). The idea is that any Parser can be used with any Producer in
+the conversion process. So, if you wanted PostgreSQL-to-Oracle, you
+would use the PostgreSQL parser and the Oracle producer.
=cut
use strict;
use vars qw($VERSION $DEFAULT_SUB $DEBUG);
-$VERSION = sprintf "%d.%02d", q$Revision: 1.3.2.1 $ =~ /(\d+)\.(\d+)/;
+$VERSION = sprintf "%d.%02d", q$Revision: 1.8 $ =~ /(\d+)\.(\d+)/;
$DEBUG = 1 unless defined $DEBUG;
-$DEFAULT_SUB = sub { $_[0] } unless defined $DEFAULT_SUB;
+# ----------------------------------------------------------------------
+# The default behavior is to "pass through" values (note that the
+# SQL::Translator instance is the first value ($_[0]), and the stuff
+# to be parsed is the second value ($_[1])
+# ----------------------------------------------------------------------
+$DEFAULT_SUB = sub { $_[1] } unless defined $DEFAULT_SUB;
+
*isa = \&UNIVERSAL::isa;
+use Carp qw(carp);
+
=head1 CONSTRUCTOR
-The constructor is called B<new>, and accepts a hash of options.
+The constructor is called B<new>, and accepts a optional hash of options.
Valid options are:
=over 4
=item parser (aka from)
+=item parser_args
+
=item producer (aka to)
-=item filename
+=item producer_args
+
+=item filename (aka file)
+
+=item data
+
+=item debug
=back
All options are, well, optional; these attributes can be set via
-instance methods.
+instance methods. Internally, they are; no (non-syntactical)
+advantage is gained by passing options to the constructor.
=cut
-# {{{ new
-
+# ----------------------------------------------------------------------
+# new([ARGS])
+# The constructor.
+#
+# new takes an optional hash of arguments. These arguments may
+# include a parser, specified with the keys "parser" or "from",
+# and a producer, specified with the keys "producer" or "to".
+#
+# The values that can be passed as the parser or producer are
+# given directly to the parser or producer methods, respectively.
+# See the appropriate method description below for details about
+# what each expects/accepts.
+# ----------------------------------------------------------------------
sub new {
my $class = shift;
- my $args = isa($_[0], 'HASH') ? shift : { @_ };
+ my $args = $_[0] && isa($_[0], 'HASH') ? shift : { @_ };
my $self = bless { } => $class;
- #
- # Set the parser and producer. If a 'parser' or 'from' parameter
- # is passed in, use that as the parser; if a 'producer' or 'to'
- # parameter is passed in, use that as the producer; both default
- # to $DEFAULT_SUB.
+ # ------------------------------------------------------------------
+ # Set the parser and producer.
#
+ # If a 'parser' or 'from' parameter is passed in, use that as the
+ # parser; if a 'producer' or 'to' parameter is passed in, use that
+ # as the producer; both default to $DEFAULT_SUB.
+ # ------------------------------------------------------------------
$self->parser( $args->{'parser'} || $args->{'from'} || $DEFAULT_SUB);
$self->producer($args->{'producer'} || $args->{'to'} || $DEFAULT_SUB);
- #
+ # ------------------------------------------------------------------
+ # Set the parser_args and producer_args
+ # ------------------------------------------------------------------
+ for my $pargs (qw(parser_args producer_args)) {
+ $self->$pargs($args->{$pargs}) if defined $args->{$pargs};
+ }
+
+ # ------------------------------------------------------------------
+ # Set the data source, if 'filename' or 'file' is provided.
+ # ------------------------------------------------------------------
+ $args->{'filename'} ||= $args->{'file'} || "";
+ $self->filename($args->{'filename'}) if $args->{'filename'};
+
+ # ------------------------------------------------------------------
+ # Finally, if there is a 'data' parameter, use that in preference
+ # to filename and file
+ # ------------------------------------------------------------------
+ if (my $data = $args->{'data'}) {
+ $self->data($data);
+ }
+
+ $self->{'debug'} = $DEBUG;
+ $self->{'debug'} = $args->{'debug'} if (defined $args->{'debug'});
+
+ # ------------------------------------------------------------------
# Clear the error
- #
+ # ------------------------------------------------------------------
$self->error_out("");
return $self;
}
-# }}}
=head1 METHODS
-
=head2 B<producer>
The B<producer> method is an accessor/mutator, used to retrieve or
define what subroutine is called to produce the output. A subroutine
-defined as a producer subroutine will be invoked as a function (not a
-method) and passed a data structure as its only argument. It is
-expected that the function transform the data structure to the output
-format, and return a string.
-
-When defining a producer, one of three things can be passed
-in: A full module name (e.g., My::Groovy::Parser), a module name
-relative to the SQL::Translator::Producer namespace (e.g., MySQL), or
-a reference to an anonymous subroutine. If a full module name is
-passed in, it is treated as a package, and a function called
-"transform" will be invoked as $modulename::transform.
+defined as a producer will be invoked as a function (not a method) and
+passed 2 parameters: its container SQL::Translator instance and a
+data structure. It is expected that the function transform the data
+structure to a string. The SQL::Transformer instance is provided for
+informational purposes; for example, the type of the parser can be
+retrieved using the B<parser_type> method, and the B<error> and
+B<debug> methods can be called when needed.
+
+When defining a producer, one of several things can be passed
+in: A module name (e.g., My::Groovy::Producer), a module name
+relative to the SQL::Translator::Producer namespace (e.g., MySQL), a
+module name and function combination (My::Groovy::Producer::transmogrify),
+or a reference to an anonymous subroutine. If a full module name is
+passed in (for the purposes of this method, a string containing "::"
+is considered to be a module name), it is treated as a package, and a
+function called "produce" will be invoked: $modulename::produce. If
+$modulename cannot be loaded, the final portion is stripped off and
+treated as a function. In other words, if there is no file named
+My/Groovy/Producer/transmogrify.pm, SQL::Translator will attempt to load
+My/Groovy/Producer.pm and use transmogrify as the name of the function,
+instead of the default "produce".
my $tr = SQL::Translator->new;
- # This will invoke My::Groovy::Producer::transform($data)
+ # This will invoke My::Groovy::Producer::produce($tr, $data)
$tr->producer("My::Groovy::Producer");
- # This will invoke SQL::Translator::Producer::Sybase::transform($data)
+ # This will invoke SQL::Translator::Producer::Sybase::produce($tr, $data)
$tr->producer("Sybase");
- # This will inoke the referenced subroutine directly
+ # This will invoke My::Groovy::Producer::transmogrify($tr, $data),
+ # assuming that My::Groovy::Producer::transmogrify is not a module
+ # on disk.
+ $tr->producer("My::Groovy::Producer::transmogrify");
+
+ # This will invoke the referenced subroutine directly, as
+ # $subref->($tr, $data);
$tr->producer(\&my_producer);
+There is also a method named B<producer_type>, which is a string
+containing the classname to which the above B<produce> function
+belongs. In the case of anonymous subroutines, this method returns
+the string "CODE".
+
+Finally, there is a method named B<producer_args>, which is both an
+accessor and a mutator. Arbitrary data may be stored in name => value
+pairs for the producer subroutine to access:
+
+ sub My::Random::producer {
+ my ($tr, $data) = @_;
+ my $pr_args = $tr->producer_args();
+
+ # $pr_args is a hashref.
+
+Extra data passed to the B<producer> method is passed to
+B<producer_args>:
+
+ $tr->producer("xSV", delimiter => ',\s*');
+
+ # In SQL::Translator::Producer::xSV:
+ my $args = $tr->producer_args;
+ my $delimiter = $args->{'delimiter'}; # value is ,\s*
+
=cut
-# TODO Make mod_perl-like assumptions about the name being passed in:
-# try to load the module; if that fails, pop off the last piece
-# (everything after the last ::) and try to load that; if that loads,
-# use the popped off piece as the function name, and not transform.
-# {{{ producer
+# producer and producer_type
sub producer {
my $self = shift;
+
+ # producer as a mutator
if (@_) {
my $producer = shift;
+
+ # Passed a module name (string containing "::")
if ($producer =~ /::/) {
- load($producer) or die "Can't load $producer: $@";
- $self->{'producer'} = \&{ "$producer\::'producer'" };
- $self->debug("Got 'producer': $producer\::'producer'");
- } elsif (isa($producer, 'CODE')) {
+ my $func_name;
+
+ # Module name was passed directly
+ # We try to load the name; if it doesn't load, there's
+ # a possibility that it has a function name attached to
+ # it.
+ if (load($producer)) {
+ $func_name = "produce";
+ }
+
+ # Module::function was passed
+ else {
+ # Passed Module::Name::function; try to recover
+ my @func_parts = split /::/, $producer;
+ $func_name = pop @func_parts;
+ $producer = join "::", @func_parts;
+
+ # If this doesn't work, then we have a legitimate
+ # problem.
+ load($producer) or die "Can't load $producer: $@";
+ }
+
+ # get code reference and assign
+ $self->{'producer'} = \&{ "$producer\::$func_name" };
+ $self->{'producer_type'} = $producer;
+ $self->debug("Got producer: $producer\::$func_name");
+ }
+
+ # passed an anonymous subroutine reference
+ elsif (isa($producer, 'CODE')) {
$self->{'producer'} = $producer;
- $self->debug("Got 'producer': code ref");
- } else {
+ $self->{'producer_type'} = "CODE";
+ $self->debug("Got producer: code ref");
+ }
+
+ # passed a string containing no "::"; relative package name
+ else {
my $Pp = sprintf "SQL::Translator::Producer::$producer";
load($Pp) or die "Can't load $Pp: $@";
- $self->{'producer'} = \&{ "$Pp\::translate" };
+ $self->{'producer'} = \&{ "$Pp\::produce" };
+ $self->{'producer_type'} = $Pp;
$self->debug("Got producer: $Pp");
}
+
# At this point, $self->{'producer'} contains a subroutine
- # reference that is ready to run!
+ # reference that is ready to run
+
+ # Anything left? If so, it's producer_args
+ $self->producer_args(@_) if (@_);
}
+
return $self->{'producer'};
};
-# }}}
+
+# ----------------------------------------------------------------------
+# producer_type
+#
+# producer_type is an accessor that allows producer subs to get
+# information about their origin. This is poptentially important;
+# since all producer subs are called as subroutine refernces, there is
+# no way for a producer to find out which package the sub lives in
+# originally, for example.
+# ----------------------------------------------------------------------
+sub producer_type { $_[0]->{'producer_type'} }
+
+# ----------------------------------------------------------------------
+# producer_args
+#
+# Arbitrary name => value pairs of paramters can be passed to a
+# producer using this method.
+# ----------------------------------------------------------------------
+sub producer_args {
+ my $self = shift;
+ if (@_) {
+ my $args = isa($_[0], 'HASH') ? shift : { @_ };
+ $self->{'producer_args'} = $args;
+ }
+ $self->{'producer_args'};
+}
=head2 B<parser>
The B<parser> method defines or retrieves a subroutine that will be
called to perform the parsing. The basic idea is the same as that of
B<producer> (see above), except the default subroutine name is
-"parse", and will be invoked as $module_name::parse. Also, the parser
-subroutine will be passed a string containing the entirety of the data
-to be parsed.
+"parse", and will be invoked as $module_name::parse($tr, $data).
+Also, the parser subroutine will be passed a string containing the
+entirety of the data to be parsed (or possibly a reference to a string?).
# Invokes SQL::Translator::Parser::MySQL::parse()
$tr->parser("MySQL");
# Invoke an anonymous subroutine directly
$tr->parser(sub {
- my $dumper = Data::Dumper->new([ $_[0] ], [ "SQL" ]);
+ my $dumper = Data::Dumper->new([ $_[1] ], [ "SQL" ]);
$dumper->Purity(1)->Terse(1)->Deepcopy(1);
return $dumper->Dump;
});
+There is also B<parser_type> and B<parser_args>, which perform
+analogously to B<producer_type> and B<producer_args>
+
=cut
-# {{{ parser
sub parser {
my $self = shift;
+
+ # parser as a mutator
if (@_) {
my $parser = shift;
+
+ # Passed a module name (string containing "::")
if ($parser =~ /::/) {
- load($parser) or die "Can't load $parser: $@";
- $self->{'parser'} = \&{ "$parser\::parse" };
- $self->debug("Got parser: $parser\::parse");
- } elsif (isa($parser, 'CODE')) {
+ my $func_name;
+
+ # Module name was passed directly
+ # We try to load the name; if it doesn't load, there's
+ # a possibility that it has a function name attached to
+ # it.
+ if (load($parser)) {
+ $func_name = "parse";
+ }
+
+ # Module::function was passed
+ else {
+ # Passed Module::Name::function; try to recover
+ my @func_parts = split /::/, $parser;
+ $func_name = pop @func_parts;
+ $parser = join "::", @func_parts;
+
+ # If this doesn't work, then we have a legitimate
+ # problem.
+ load($parser) or die "Can't load $parser: $@";
+ }
+
+ # get code reference and assign
+ $self->{'parser'} = \&{ "$parser\::$func_name" };
+ $self->{'parser_type'} = $parser;
+ $self->debug("Got parser: $parser\::$func_name");
+ }
+
+ # passed an anonymous subroutine reference
+ elsif (isa($parser, 'CODE')) {
$self->{'parser'} = $parser;
+ $self->{'parser_type'} = "CODE";
$self->debug("Got parser: code ref");
- } else {
- my $Pp = "SQL::Translator::Parser::$parser";
+ }
+
+ # passed a string containing no "::"; relative package name
+ else {
+ my $Pp = sprintf "SQL::Translator::Parser::$parser";
load($Pp) or die "Can't load $Pp: $@";
$self->{'parser'} = \&{ "$Pp\::parse" };
+ $self->{'parser_type'} = $Pp;
$self->debug("Got parser: $Pp");
- }
- # At this point, $self->{$pp} contains a subroutine
- # reference that is ready to run!
+ }
+
+ # At this point, $self->{'parser'} contains a subroutine
+ # reference that is ready to run
+
+ $self->parser_args(@_) if (@_);
}
+
return $self->{'parser'};
}
-# }}}
+
+sub parser_type { $_[0]->{'parser_type'} }
+
+# parser_args
+sub parser_args {
+ my $self = shift;
+ if (@_) {
+ my $args = isa($_[0], 'HASH') ? shift : { @_ };
+ $self->{'parser_args'} = $args;
+ }
+ $self->{'parser_args'};
+}
=head2 B<translate>
=item *
1 argument means it's the data to be parsed; which could be a string
-(filename), a reference to a GLOB (filehandle from which to read a
-string), a refernce to a scalar (a string stored in memory), or a
-reference to a hash (which means the same thing as below).
+(filename) or a refernce to a scalar (a string stored in memory), or a
+reference to a hash, which is parsed as being more than one argument
+(see next section).
# Parse the file /path/to/datafile
my $output = $tr->translate("/path/to/datafile");
- # The same thing:
- my $fh = IO::File->new("/path/to/datafile");
- my $output = $tr->translate($fh);
-
- # Again, the same thing:
- my $fh = IO::File->new("/path/to/datafile");
- my $data = { local $/; <$fh> };
+ # Parse the data contained in the string $data
my $output = $tr->translate(\$data);
=item *
-> 1 argument means its a hash of things, and it might be setting a
-parser, producer, or datasource (this key is named "filename" or
-"file" if it's a file, or "data" for a GLOB or SCALAR reference).
+More than 1 argument means its a hash of things, and it might be
+setting a parser, producer, or datasource (this key is named
+"filename" or "file" if it's a file, or "data" for a SCALAR reference.
# As above, parse /path/to/datafile, but with different producers
for my $prod ("MySQL", "XML", "Sybase") {
}
# The filename hash key could also be:
- datasource => $fh,
-
- # or
datasource => \$data,
You get the idea.
=back
+=head2 B<filename>, B<data>
+
+Using the B<filename> method, the filename of the data to be parsed
+can be set. This method can be used in conjunction with the B<data>
+method, below. If both the B<filename> and B<data> methods are
+invoked as mutators, the data set in the B<data> method is used.
+
+ $tr->filename("/my/data/files/create.sql");
+
+or:
+
+ my $create_script = do {
+ local $/;
+ open CREATE, "/my/data/files/create.sql" or die $!;
+ <CREATE>;
+ };
+ $tr->data(\$create_script);
+
+B<filename> takes a string, which is interpreted as a filename.
+B<data> takes a reference to a string, which is used as the data to be
+parsed. If a filename is set, then that file is opened and read when
+the B<translate> method is called, as long as the data instance
+variable is not set.
+
=cut
-# {{{ translate
+# filename - get or set the filename
+sub filename {
+ my $self = shift;
+ if (@_) {
+ my $filename = shift;
+ if (-d $filename) {
+ my $msg = "Cannot use directory '$filename' as input source";
+ $self->error_out($msg);
+ return;
+ } elsif (-f _ && -r _) {
+ $self->{'filename'} = $filename;
+ $self->debug("Got filename: $self->{'filename'}");
+ } else {
+ my $msg = "Cannot use '$filename' as input source: ".
+ "file does not exist or is not readable.";
+ $self->error_out($msg);
+ return;
+ }
+ }
+
+ $self->{'filename'};
+}
+
+# data - get or set the data
+# if $self->{'data'} is not set, but $self->{'filename'} is, then
+# $self->{'filename'} is opened and read, whith the results put into
+# $self->{'data'}.
+sub data {
+ my $self = shift;
+
+ # Set $self->{'data'} to $_[0], if it is provided.
+ if (@_) {
+ my $data = shift;
+ if (isa($data, "SCALAR")) {
+ $self->{'data'} = $data;
+ }
+ elsif (! ref $data) {
+ $self->{'data'} = \$data;
+ }
+ }
+
+ # If we have a filename but no data yet, populate.
+ if (not $self->{'data'} and my $filename = $self->filename) {
+ $self->debug("Opening '$filename' to get contents...");
+ local *FH;
+ local $/;
+ my $data;
+
+ unless (open FH, $filename) {
+ $self->error_out("Can't open $filename for reading: $!");
+ return;
+ }
+
+ $data = <FH>;
+ $self->{'data'} = \$data;
+
+ unless (close FH) {
+ $self->error_out("Can't close $filename: $!");
+ return;
+ }
+ }
+
+ return $self->{'data'};
+}
+
+# translate
sub translate {
my $self = shift;
- my ($args, $parser, $producer);
+ my ($args, $parser, $parser_type, $producer, $producer_type);
+ my ($parser_output, $producer_output);
- if (@_ == 1) {
+ # Parse arguments
+ if (@_ == 1) {
+ # Passed a reference to a hash?
if (isa($_[0], 'HASH')) {
- # Passed a hashref
+ # yep, a hashref
+ $self->debug("translate: Got a hashref");
$args = $_[0];
}
- elsif (isa($_[0], 'GLOB')) {
- # passed a filehandle; slurp it
- local $/;
- $args = { data => <$_[0]> };
- }
+
+ # Passed a reference to a string containing the data
elsif (isa($_[0], 'SCALAR')) {
- # passed a ref to a string; deref it
- $args = { data => ${$_[0]} };
+ # passed a ref to a string
+ $self->debug("translate: Got a SCALAR reference (string)");
+ $self->data($_[0]);
}
- else {
+
+ # Not a reference; treat it as a filename
+ elsif (! ref $_[0]) {
# Not a ref, it's a filename
- $args = { filename => $_[0] };
+ $self->debug("translate: Got a filename");
+ $self->filename($_[0]);
+ }
+
+ # Passed something else entirely.
+ else {
+ # We're not impressed. Take your empty string and leave.
+ # return "";
+
+ # Actually, if data, parser, and producer are set, then we
+ # can continue. Too bad, because I like my comment
+ # (above)...
+ return "" unless ($self->data &&
+ $self->producer &&
+ $self->parser);
}
}
else {
- # Should we check if @_ % 2, or just eat the errors if they occur?
+ # You must pass in a hash, or you get nothing.
+ return "" if @_ % 2;
$args = { @_ };
}
- if ((defined $args->{'filename'} ||
- defined $args->{'file'} ) && not $args->{'data'}) {
- local *FH;
- local $/;
+ # ----------------------------------------------------------------------
+ # Can specify the data to be transformed using "filename", "file",
+ # "data", or "datasource".
+ # ----------------------------------------------------------------------
+ if (my $filename = ($args->{'filename'} || $args->{'file'})) {
+ $self->filename($filename);
+ }
- open FH, $args->{'filename'} or die $!;
- $args->{'data'} = <FH>;
- close FH or die $!;
+ if (my $data = ($self->{'data'} || $self->{'datasource'})) {
+ $self->data($data);
}
- #
- # Last chance to bail out; if there's nothing in the data
- # key of %args, back out.
- #
- return unless defined $args->{'data'};
+ # ----------------------------------------------------------------
+ # Get the data.
+ # ----------------------------------------------------------------
+ my $data = $self->data;
+ unless (length $$data) {
+ $self->error_out("Empty data file!");
+ return "";
+ }
- #
+ # ----------------------------------------------------------------
# Local reference to the parser subroutine
- #
+ # ----------------------------------------------------------------
if ($parser = ($args->{'parser'} || $args->{'from'})) {
$self->parser($parser);
- } else {
- $parser = $self->parser;
}
+ $parser = $self->parser;
+ $parser_type = $self->parser_type;
- #
+ # ----------------------------------------------------------------
# Local reference to the producer subroutine
- #
+ # ----------------------------------------------------------------
if ($producer = ($args->{'producer'} || $args->{'to'})) {
$self->producer($producer);
- } else {
- $producer = $self->producer;
+ }
+ $producer = $self->producer;
+ $producer_type = $self->producer_type;
+
+ # ----------------------------------------------------------------
+ # Execute the parser, then execute the producer with that output.
+ # Allowances are made for each piece to die, or fail to compile,
+ # since the referenced subroutines could be almost anything. In
+ # the future, each of these might happen in a Safe environment,
+ # depending on how paranoid we want to be.
+ # ----------------------------------------------------------------
+ eval { $parser_output = $parser->($self, $$data) };
+ if ($@ || ! $parser_output) {
+ my $msg = sprintf "translate: Error with parser '%s': %s",
+ $parser_type, ($@) ? $@ : " no results";
+ $self->error_out($msg);
+ return;
}
- #
- # Execute the parser, then execute the producer with that output
- #
- my $translated = $parser->($args->{'data'});
+ eval { $producer_output = $producer->($self, $parser_output) };
+ if ($@ || ! $producer_output) {
+ my $msg = sprintf "translate: Error with producer '%s': %s",
+ $producer_type, ($@) ? $@ : " no results";
+ $self->error_out($msg);
+ return;
+ }
- return $producer->($translated);
+ return $producer_output;
}
-# }}}
=head2 B<error>
=cut
-# {{{ error
#-----------------------------------------------------
sub error {
#
#
return shift()->{'error'} || '';
}
-# }}}
=head2 B<error_out>
=cut
-# {{{ error_out
+# error_out
sub error_out {
my $self = shift;
if ( my $error = shift ) {
}
return;
}
-# }}}
=head2 B<debug>
=cut
-# {{{ debug
-use Carp qw(carp);
+# debug
sub debug {
my $self = shift;
- carp @_ if ($DEBUG);
+# if (ref $self) {
+# carp @_ if $self->{'debug'};
+# }
+# else {
+ if ($DEBUG) {
+ my $class = ref $self || $self;
+ carp "[$class] $_" for @_;
+ }
+# }
}
-# }}}
-# {{{ load
sub load {
my $module = do { my $m = shift; $m =~ s[::][/]g; "$m.pm" };
return 1 if $INC{$module};
return if ($@);
return 1;
}
-# }}}
1;
# Henry David Thoreau
#-----------------------------------------------------
-=head1 AUTHOR
+=head1 AUTHORS
Ken Y. Clark, E<lt>kclark@logsoft.comE<gt>,
darren chamberlain E<lt>darren@cpan.orgE<gt>