package SQL::Translator;
# ----------------------------------------------------------------------
-# $Id: Translator.pm,v 1.4 2002-03-21 18:50:53 dlc Exp $
+# $Id: Translator.pm,v 1.14 2002-11-26 03:59:57 kycl4rk Exp $
# ----------------------------------------------------------------------
-# Copyright (C) 2002 Ken Y. Clark <kycl4rk@users.sourceforge.net>,
+# Copyright (C) 2002 Ken Y. Clark <kclark@cpan.org>,
# darren chamberlain <darren@cpan.org>
#
# This program is free software; you can redistribute it and/or
=head1 SYNOPSIS
use SQL::Translator;
- my $translator = SQL::Translator->new;
- my $output = $translator->translate(
- from => "MySQL",
- to => "Oracle",
- filename => $file,
- ) or die $translator->error;
+ my $translator = SQL::Translator->new(
+ xlate => $xlate || {}, # Overrides for field translation
+ debug => $debug, # Print debug info
+ trace => $trace, # Print Parse::RecDescent trace
+ no_comments => $no_comments, # Don't include comments in output
+ show_warnings => $show_warnings, # Print name mutations, conflicts
+ add_drop_table => $add_drop_table, # Add "drop table" statements
+ );
+
+ my $output = $translator->translate(
+ from => "MySQL",
+ to => "Oracle",
+ filename => $file,
+ ) or die $translator->error;
+
print $output;
=head1 DESCRIPTION
This module attempts to simplify the task of converting one database
-create syntax to another through the use of Parsers and Producers.
-The idea is that any Parser can be used with any Producer in the
-conversion process. So, if you wanted PostgreSQL-to-Oracle, you would
-use the PostgreSQL parser and the Oracle producer.
-
-Currently, the existing parsers use Parse::RecDescent, but this not
-a requirement, or even a recommendation. New parser modules don't
-necessarily have to use Parse::RecDescent, as long as the module
-implements the appropriate API. With this separation of code, it is
-hoped that developers will find it easy to add more database dialects
-by using what's written, writing only what they need, and then
-contributing their parsers or producers back to the project.
+create syntax to another through the use of Parsers (which understand
+the sourced format) and Producers (which understand the destination
+format). The idea is that any Parser can be used with any Producer in
+the conversion process. So, if you wanted PostgreSQL-to-Oracle, you
+would use the PostgreSQL parser and the Oracle producer.
=cut
use strict;
-use vars qw($VERSION $DEFAULT_SUB $DEBUG);
-$VERSION = sprintf "%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/;
-$DEBUG = 1 unless defined $DEBUG;
+use vars qw( $VERSION $REVISION $DEFAULT_SUB $DEBUG $ERROR );
+use base 'Class::Base';
+
+$VERSION = '0.01';
+$REVISION = sprintf "%d.%02d", q$Revision: 1.14 $ =~ /(\d+)\.(\d+)/;
+$DEBUG = 0 unless defined $DEBUG;
+$ERROR = "";
+
+use Carp qw(carp);
+
+use File::Spec::Functions qw(catfile);
+use File::Basename qw(dirname);
+use IO::Dir;
# ----------------------------------------------------------------------
# The default behavior is to "pass through" values (note that the
# ----------------------------------------------------------------------
$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 optional hash of options.
=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
=cut
-# {{{ new
# ----------------------------------------------------------------------
-# new([ARGS])
+# init([ARGS])
# The constructor.
#
# new takes an optional hash of arguments. These arguments may
# given directly to the parser or producer methods, respectively.
# See the appropriate method description below for details about
# what each expects/accepts.
-#
-# TODO
-# * Support passing an input (filename or string) as with
-# translate
# ----------------------------------------------------------------------
-sub new {
- my $class = shift;
- my $args = isa($_[0], 'HASH') ? shift : { @_ };
- my $self = bless { } => $class;
+sub init {
+ my ( $self, $config ) = @_;
- # ------------------------------------------------------------------
+ #
# 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);
+ #
+ $self->parser ($config->{'parser'} || $config->{'from'} || $DEFAULT_SUB);
+ $self->producer($config->{'producer'} || $config->{'to'} || $DEFAULT_SUB);
+
+ #
+ # Set the parser_args and producer_args
+ #
+ for my $pargs ( qw[ parser_args producer_args ] ) {
+ $self->$pargs( $config->{$pargs} ) if defined $config->{ $pargs };
+ }
+
+ #
+ # Set the data source, if 'filename' or 'file' is provided.
+ #
+ $config->{'filename'} ||= $config->{'file'} || "";
+ $self->filename( $config->{'filename'} ) if $config->{'filename'};
+
+ #
+ # Finally, if there is a 'data' parameter, use that in
+ # preference to filename and file
+ #
+ if ( my $data = $config->{'data'} ) {
+ $self->data( $data );
+ }
+
+ #
+ # Set various other options.
+ #
+ $self->{'debug'} = defined $config->{'debug'} ? $config->{'debug'} : $DEBUG;
+
- # ------------------------------------------------------------------
- # Clear the error
- # ------------------------------------------------------------------
- $self->error_out("");
+ $self->add_drop_table( $config->{'add_drop_table'} );
+
+ $self->custom_translate( $config->{'xlate'} );
+
+ $self->no_comments( $config->{'no_comments'} );
+
+ $self->show_warnings( $config->{'show_warnings'} );
+
+ $self->trace( $config->{'trace'} );
return $self;
}
-# }}}
=head1 METHODS
+# ----------------------------------------------------------------------
+=head2 B<add_drop_table>
+
+Toggles whether or not to add "DROP TABLE" statements just before the
+create definitions.
+
+=cut
+
+sub add_drop_table {
+ my $self = shift;
+ if ( defined (my $arg = shift) ) {
+ $self->{'add_drop_table'} = $arg ? 1 : 0;
+ }
+ return $self->{'add_drop_table'} || 0;
+}
+
+
+# ----------------------------------------------------------------------
+=head2 B<custom_translate>
+
+Allows the user to override default translation of fields. For example,
+if a MySQL "text" field would normally be converted to a "long" for Oracle,
+the user could specify to change it to a "CLOB." Accepts a hashref where
+keys are the "from" value and values are the "to," returns the current
+value of the field.
+
+=cut
+
+sub custom_translate {
+ my $self = shift;
+ $self->{'custom_translate'} = shift if @_;
+ return $self->{'custom_translate'} || {};
+}
+
+# ----------------------------------------------------------------------
+=head2 B<no_comments>
+
+Toggles whether to print comments in the output. Accepts a true or false
+value, returns the current value.
+
+=cut
+
+sub no_comments {
+ my $self = shift;
+ my $arg = shift;
+ if ( defined $arg ) {
+ $self->{'no_comments'} = $arg ? 1 : 0;
+ }
+ return $self->{'no_comments'} || 0;
+}
+
+# ----------------------------------------------------------------------
=head2 B<producer>
The B<producer> method is an accessor/mutator, used to retrieve or
# This will invoke My::Groovy::Producer::transmogrify($tr, $data),
# assuming that My::Groovy::Producer::transmogrify is not a module
# on disk.
- # $tr->producer("My::Groovy::Producer::transmogrify);
+ $tr->producer("My::Groovy::Producer::transmogrify");
# This will invoke the referenced subroutine directly, as
# $subref->($tr, $data);
belongs. In the case of anonymous subroutines, this method returns
the string "CODE".
+Finally, there is a method named B<producer_args>, which is both an
+accessor and a mutator. Arbitrary data may be stored in name => value
+pairs for the producer subroutine to access:
+
+ sub My::Random::producer {
+ my ($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
-# {{{ producer and producer_type
+# producer and producer_type
sub producer {
my $self = shift;
- # {{{ producer as a mutator
+ # producer as a mutator
if (@_) {
my $producer = shift;
- # {{{ Passed a module name (string containing "::")
+ # Passed a module name (string containing "::")
if ($producer =~ /::/) {
my $func_name;
- # {{{ Module name was passed directly
+ # Module name was passed directly
# We try to load the name; if it doesn't load, there's
# a possibility that it has a function name attached to
# it.
if (load($producer)) {
$func_name = "produce";
- } # }}}
+ }
- # {{{ Module::function was passed
+ # Module::function was passed
else {
# Passed Module::Name::function; try to recover
my @func_parts = split /::/, $producer;
# If this doesn't work, then we have a legitimate
# problem.
load($producer) or die "Can't load $producer: $@";
- } # }}}
+ }
- # {{{ get code reference and assign
+ # get code reference and assign
$self->{'producer'} = \&{ "$producer\::$func_name" };
$self->{'producer_type'} = $producer;
- $self->debug("Got 'producer': $producer\::$func_name");
- # }}}
- } # }}}
+ $self->debug("Got producer: $producer\::$func_name\n");
+ }
- # {{{ passed an anonymous subroutine reference
+ # passed an anonymous subroutine reference
elsif (isa($producer, 'CODE')) {
$self->{'producer'} = $producer;
$self->{'producer_type'} = "CODE";
- $self->debug("Got 'producer': code ref");
- } # }}}
+ $self->debug("Got producer: code ref\n");
+ }
- # {{{ passed a string containing no "::"; relative package name
+ # 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\::produce" };
$self->{'producer_type'} = $Pp;
- $self->debug("Got producer: $Pp");
- } # }}}
+ $self->debug("Got producer: $Pp\n");
+ }
# At this point, $self->{'producer'} contains a subroutine
# 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.
+#
+# XXX All calls to producer_args with a value clobbers old values!
+# Should probably check if $_[0] is undef, and delete stored
+# args if it is:
+#
+# if (@_) {
+# unless (defined $_[0]) {
+# %{ $self->{'producer_args'} } = ();
+# }
+# my $args = isa($_[0], 'HASH') ? shift : { @_ };
+# %{ $self->{'producer_args'} } = (
+# %{ $self->{'producer_args'} },
+# %{ $args }
+# );
+# }
+# ----------------------------------------------------------------------
+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
B<producer> (see above), except the default subroutine name is
"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?).
+entirety of the data to be parsed.
# Invokes SQL::Translator::Parser::MySQL::parse()
$tr->parser("MySQL");
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 and parser_type
sub parser {
my $self = shift;
- # {{{ parser as a mutator
+ # parser as a mutator
if (@_) {
my $parser = shift;
- # {{{ Passed a module name (string containing "::")
+ # Passed a module name (string containing "::")
if ($parser =~ /::/) {
my $func_name;
- # {{{ Module name was passed directly
+ # Module name was passed directly
# We try to load the name; if it doesn't load, there's
# a possibility that it has a function name attached to
# it.
if (load($parser)) {
$func_name = "parse";
- } # }}}
+ }
- # {{{ Module::function was passed
+ # Module::function was passed
else {
# Passed Module::Name::function; try to recover
my @func_parts = split /::/, $parser;
# If this doesn't work, then we have a legitimate
# problem.
load($parser) or die "Can't load $parser: $@";
- } # }}}
+ }
- # {{{ get code reference and assign
+ # get code reference and assign
$self->{'parser'} = \&{ "$parser\::$func_name" };
$self->{'parser_type'} = $parser;
- $self->debug("Got parser: $parser\::$func_name");
- # }}}
- } # }}}
+ $self->debug("Got parser: $parser\::$func_name\n");
+ }
- # {{{ passed an anonymous subroutine reference
- elsif (isa($parser, 'CODE')) {
- $self->{'parser'} = $parser;
+ # passed an anonymous subroutine reference
+ elsif ( isa( $parser, 'CODE' ) ) {
+ $self->{'parser'} = $parser;
$self->{'parser_type'} = "CODE";
- $self->debug("Got 'parser': code ref");
- } # }}}
+ $self->debug("Got parser: code ref\n");
+ }
- # {{{ passed a string containing no "::"; relative package name
+ # 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" };
+ my $Pp = "SQL::Translator::Parser::$parser";
+ load( $Pp ) or die "Can't load $Pp: $@";
+ $self->{'parser'} = \&{ "$Pp\::parse" };
$self->{'parser_type'} = $Pp;
- $self->debug("Got parser: $Pp");
- } # }}}
+ $self->debug("Got parser: $Pp\n");
+ }
+ #
# 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'} }
-# }}}
+# ----------------------------------------------------------------------
+# XXX See notes on producer_args, above
+sub parser_args {
+ my $self = shift;
+ if (@_) {
+ my $args = isa($_[0], 'HASH') ? shift : { @_ };
+ $self->{'parser_args'} = $args;
+ }
+ $self->{'parser_args'};
+}
+
+# ----------------------------------------------------------------------
+=head2 B<show_warnings>
+
+Toggles whether to print warnings of name conflicts, identifier
+mutations, etc. Probably only generated by producers to let the user
+know when something won't translate very smoothly (e.g., MySQL "enum"
+fields into Oracle). Accepts a true or false value, returns the
+current value.
+
+=cut
+
+sub show_warnings {
+ my $self = shift;
+ my $arg = shift;
+ if ( defined $arg ) {
+ $self->{'show_warnings'} = $arg ? 1 : 0;
+ }
+ return $self->{'show_warnings'} || 0;
+}
+
+# ----------------------------------------------------------------------
=head2 B<translate>
The B<translate> method calls the subroutines referenced by the
=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";
+ return $self->error($msg);
+ } elsif (-f _ && -r _) {
+ $self->{'filename'} = $filename;
+ $self->debug("Got filename: '$self->{'filename'}'\n");
+ } else {
+ my $msg = "Cannot use '$filename' as input source: ".
+ "file does not exist or is not readable.";
+ return $self->error($msg);
+ }
+ }
+
+ $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.\n");
+ local *FH;
+ local $/;
+ my $data;
+
+ unless (open FH, $filename) {
+ return $self->error("Can't read file '$filename': $!");
+ }
+
+ $data = <FH>;
+ $self->{'data'} = \$data;
+
+ unless (close FH) {
+ return $self->error("Can't close file '$filename': $!");
+ }
+ }
+
+ return $self->{'data'};
+}
+
+# ----------------------------------------------------------------------
+=pod
+
+=head2 B<trace>
+
+Turns on/off the tracing option of Parse::RecDescent.
+
+=cut
+
+sub trace {
+ my $self = shift;
+ my $arg = shift;
+ if ( defined $arg ) {
+ $self->{'trace'} = $arg ? 1 : 0;
+ }
+ return $self->{'trace'} || 0;
+}
+
+# ----------------------------------------------------------------------
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
- $self->debug("translate: Got a hashref");
+ # yep, a hashref
+ $self->debug("translate: Got a hashref\n");
$args = $_[0];
}
+
+ # Passed a reference to a string containing the data
elsif (isa($_[0], 'SCALAR')) {
- # passed a ref to a string; deref it
- $self->debug("translate: Got a SCALAR reference (string)");
- $args = { data => ${$_[0]} };
+ # passed a ref to a string
+ $self->debug("translate: Got a SCALAR reference (string)\n");
+ $self->data($_[0]);
}
+
+ # Not a reference; treat it as a filename
elsif (! ref $_[0]) {
# Not a ref, it's a filename
- $self->debug("translate: Got a filename");
- $args = { filename => $_[0] };
+ $self->debug("translate: Got a filename\n");
+ $self->filename($_[0]);
}
+
+ # Passed something else entirely.
else {
# We're not impressed. Take your empty string and leave.
- return "";
+ # 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 {
$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 "Can't open $args->{'filename'} for reading: $!";
- $args->{'data'} = <FH>;
- close FH or die "Can't close $args->{'filename'}: $!";
+ 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 $$data) {
+ return $self->error("Empty data file!");
+ }
- #
+ # ----------------------------------------------------------------
# Local reference to the parser subroutine
- #
+ # ----------------------------------------------------------------
if ($parser = ($args->{'parser'} || $args->{'from'})) {
$self->parser($parser);
- } else {
- $parser = $self->parser;
}
+ $parser = $self->parser;
+ $parser_type = $self->parser_type;
- #
+ # ----------------------------------------------------------------
# Local reference to the producer subroutine
- #
+ # ----------------------------------------------------------------
if ($producer = ($args->{'producer'} || $args->{'to'})) {
$self->producer($producer);
- } else {
- $producer = $self->producer;
+ }
+ $producer = $self->producer;
+ $producer_type = $self->producer_type;
+
+ # ----------------------------------------------------------------
+ # Execute the parser, then execute the producer with that output.
+ # Allowances are made for each piece to die, or fail to compile,
+ # since the referenced subroutines could be almost anything. In
+ # the future, each of these might happen in a Safe environment,
+ # depending on how paranoid we want to be.
+ # ----------------------------------------------------------------
+ eval { $parser_output = $parser->($self, $$data) };
+ if ($@ || ! $parser_output) {
+ my $msg = sprintf "translate: Error with parser '%s': %s",
+ $parser_type, ($@) ? $@ : " no results";
+ return $self->error($msg);
}
- #
- # Execute the parser, then execute the producer with that output
- #
- return $producer->($self, $parser->($self, $args->{'data'}));
-}
-# }}}
-
-=head2 B<error>
-
-The error method returns the last error.
-
-=cut
+ eval { $producer_output = $producer->($self, $parser_output) };
+ if ($@ || ! $producer_output) {
+ my $msg = sprintf "translate: Error with producer '%s': %s",
+ $producer_type, ($@) ? $@ : " no results";
+ return $self->error($msg);
+ }
-# {{{ error
-#-----------------------------------------------------
-sub error {
-#
-# Return the last error.
-#
- return shift()->{'error'} || '';
+ return $producer_output;
}
-# }}}
-=head2 B<error_out>
-
-Record the error and return undef. The error can be retrieved by
-calling programs using $tr->error.
+# ----------------------------------------------------------------------
+sub list_producers {
+ require SQL::Translator::Producer;
+ my $path = catfile(dirname($INC{'SQL/Translator/Producer.pm'}), "Producer");
+ my $dh = IO::Dir->new($path);
-For Parser or Producer writers, primarily.
+ my @available = map { join "::", "SQL::Translator::Producer", $_ }
+ grep /\.pm$/, $dh->read;
-=cut
-
-# {{{ error_out
-sub error_out {
- my $self = shift;
- if ( my $error = shift ) {
- $self->{'error'} = $error;
- }
- return;
+ return @available;
}
-# }}}
-=head2 B<debug>
-
-If the global variable $SQL::Translator::DEBUG is set to a true value,
-then calls to $tr->debug($msg) will be carped to STDERR. If $DEBUG is
-not set, then this method does nothing.
+# ----------------------------------------------------------------------
+sub list_parsers {
+ require SQL::Translator::Parser;
+ my $path = catfile(dirname($INC{'SQL/Translator/Parser.pm'}), "Parser");
+ my $dh = IO::Dir->new($path);
-=cut
+ my @available = map { join "::", "SQL::Translator::Parser", $_ }
+ grep /\.pm$/, $dh->read;
-# {{{ debug
-sub debug {
- my $self = shift;
- carp @_ if ($DEBUG);
+ return @available;
}
-# }}}
-# {{{ load
+# ----------------------------------------------------------------------
sub load {
my $module = do { my $m = shift; $m =~ s[::][/]g; "$m.pm" };
return 1 if $INC{$module};
return if ($@);
return 1;
}
-# }}}
+
+# ----------------------------------------------------------------------
+sub isa { UNIVERSAL::isa($_[0], $_[1]) }
1;
-__END__
#-----------------------------------------------------
# Rescue the drowning and tie your shoestrings.
# Henry David Thoreau
#-----------------------------------------------------
-=head1 AUTHOR
+=pod
+
+=head1 AUTHORS
-Ken Y. Clark, E<lt>kclark@logsoft.comE<gt>,
-darren chamberlain E<lt>darren@cpan.orgE<gt>
+Ken Y. Clark, E<lt>kclark@cpan.org<gt>,
+darren chamberlain E<lt>darren@cpan.orgE<gt>,
+Chris Mungall E<lt>cjm@fruitfly.orgE<gt>
=head1 COPYRIGHT
projects / dbsrgits/SQL-Translator.git / blobdiff