X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FTranslator.pm;h=e6dbc5b59abddea9cdfbbe47bafeb57d9c2893d8;hb=4eb28bc31cdc1d754b7a853e7bd00244b683e7cb;hp=446fa21d600c1a612d9144d6eca130421a0ea319;hpb=2d993495a15b2fb29200f85e65caaf2ebef7add3;p=dbsrgits%2FSQL-Translator.git diff --git a/lib/SQL/Translator.pm b/lib/SQL/Translator.pm index 446fa21..e6dbc5b 100644 --- a/lib/SQL/Translator.pm +++ b/lib/SQL/Translator.pm @@ -1,7 +1,7 @@ package SQL::Translator; # ---------------------------------------------------------------------- -# $Id: Translator.pm,v 1.57 2004-04-22 19:59:46 kycl4rk Exp $ +# $Id: Translator.pm,v 1.68 2005-06-09 02:02:00 grommit Exp $ # ---------------------------------------------------------------------- # Copyright (C) 2002-4 The SQLFairy Authors # @@ -26,8 +26,8 @@ use base 'Class::Base'; require 5.004; -$VERSION = '0.06'; -$REVISION = sprintf "%d.%02d", q$Revision: 1.57 $ =~ /(\d+)\.(\d+)/; +$VERSION = '0.07'; +$REVISION = sprintf "%d.%02d", q$Revision: 1.68 $ =~ /(\d+)\.(\d+)/; $DEBUG = 0 unless defined $DEBUG; $ERROR = ""; @@ -73,13 +73,14 @@ sub init { $self->parser ($config->{'parser'} || $config->{'from'} || $DEFAULT_SUB); $self->producer($config->{'producer'} || $config->{'to'} || $DEFAULT_SUB); - # - # Set up callbacks for formatting of pk,fk,table,package names in producer - # - $self->format_table_name($config->{'format_table_name'}); - $self->format_package_name($config->{'format_package_name'}); - $self->format_fk_name($config->{'format_fk_name'}); - $self->format_pk_name($config->{'format_pk_name'}); + # + # Set up callbacks for formatting of pk,fk,table,package names in producer + # MOVED TO PRODUCER ARGS + # + #$self->format_table_name($config->{'format_table_name'}); + #$self->format_package_name($config->{'format_package_name'}); + #$self->format_fk_name($config->{'format_fk_name'}); + #$self->format_pk_name($config->{'format_pk_name'}); # # Set the parser_args and producer_args @@ -89,13 +90,21 @@ sub init { } # + # Initialize the filters. + # + if ( $config->{filters} && ref $config->{filters} eq "ARRAY" ) { + $self->filters( @{$config->{filters}} ) + || return $self->error('Error inititializing filters: '.$self->error); + } + + # # 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 + # Finally, if there is a 'data' parameter, use that in # preference to filename and file # if ( my $data = $config->{'data'} ) { @@ -108,7 +117,7 @@ sub init { $self->{'debug'} = defined $config->{'debug'} ? $config->{'debug'} : $DEBUG; $self->add_drop_table( $config->{'add_drop_table'} ); - + $self->no_comments( $config->{'no_comments'} ); $self->show_warnings( $config->{'show_warnings'} ); @@ -150,68 +159,12 @@ sub no_comments { # Get or set the producer for the current translator. # ---------------------------------------------------------------------- sub producer { - my $self = shift; - - # producer as a mutator - if (@_) { - my $producer = shift; - - # Passed a module name (string containing "::") - if ($producer =~ /::/) { - 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\n"); - } - - # passed an anonymous subroutine reference - elsif (isa($producer, 'CODE')) { - $self->{'producer'} = $producer; - $self->{'producer_type'} = "CODE"; - $self->debug("Got producer: code ref\n"); - } - - # passed a string containing no "::"; relative package name - else { - $producer =~ s/-/::/g; - 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\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'}; -}; + shift->_tool({ + name => 'producer', + path => "SQL::Translator::Producer", + default_sub => "produce", + }, @_); +} # ---------------------------------------------------------------------- # producer_type() @@ -234,86 +187,57 @@ sub producer_type { $_[0]->{'producer_type'} } # is cleared; all subsequent elements are added to the hash of name, # value pairs stored as producer_args. # ---------------------------------------------------------------------- -sub producer_args { - my $self = shift; - return $self->_args("producer", @_); -} +sub producer_args { shift->_args("producer", @_); } # ---------------------------------------------------------------------- # parser([$parser_spec]) # ---------------------------------------------------------------------- sub parser { - my $self = shift; + shift->_tool({ + name => 'parser', + path => "SQL::Translator::Parser", + default_sub => "parse", + }, @_); +} - # parser as a mutator - if (@_) { - my $parser = shift; - - # Passed a module name (string containing "::") - if ($parser =~ /::/) { - 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"; - } +sub parser_type { $_[0]->{'parser_type'}; } - # 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\n"); - } - - # passed an anonymous subroutine reference - elsif ( isa( $parser, 'CODE' ) ) { - $self->{'parser'} = $parser; - $self->{'parser_type'} = "CODE"; - $self->debug("Got parser: code ref\n"); - } +sub parser_args { shift->_args("parser", @_); } - # passed a string containing no "::"; relative package name +# ---------------------------------------------------------------------- +# e.g. +# $sqlt->filters => [ +# sub { }, +# [ "NormalizeNames", field => "lc", tabel => "ucfirst" ], +# [ +# "DataTypeMap", +# "TEXT" => "BIGTEXT", +# ], +# ], +# ---------------------------------------------------------------------- +sub filters { + my $self = shift; + my $filters = $self->{filters} ||= []; + return @$filters unless @_; + + # Set. Convert args to list of [\&code,@args] + foreach (@_) { + my ($filt,@args) = ref($_) eq "ARRAY" ? @$_ : $_; + if ( isa($filt,"CODE") ) { + push @$filters, [$filt,@args]; + next; + } else { - $parser =~ s/-/::/g; - 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\n"); - } - - # - # At this point, $self->{'parser'} contains a subroutine - # reference that is ready to run - # - $self->parser_args( @_ ) if (@_); + $self->debug("Adding $filt filter. Args:".Dumper(\@args)."\n"); + $filt = _load_sub("$filt\::filter", "SQL::Translator::Filter") + || return $self->error(__PACKAGE__->error); + push @$filters, [$filt,@args]; + } } - - return $self->{'parser'}; + return @$filters; } # ---------------------------------------------------------------------- -sub parser_type { $_[0]->{'parser_type'} } - -sub parser_args { - my $self = shift; - return $self->_args("parser", @_); -} - sub show_warnings { my $self = shift; my $arg = shift; @@ -426,7 +350,9 @@ sub schema { my $self = shift; unless ( defined $self->{'schema'} ) { - $self->{'schema'} = SQL::Translator::Schema->new; + $self->{'schema'} = SQL::Translator::Schema->new( + translator => $self, + ); } return $self->{'schema'}; @@ -463,7 +389,7 @@ sub translate { my ($parser_output, $producer_output); # Parse arguments - if (@_ == 1) { + if (@_ == 1) { # Passed a reference to a hash? if (isa($_[0], 'HASH')) { # yep, a hashref @@ -546,12 +472,14 @@ sub translate { $producer_type = $self->producer_type; # ---------------------------------------------------------------- - # Execute the parser, then execute the producer with that output. + # Execute the parser, the filters and then execute the producer. # 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. # ---------------------------------------------------------------- + + # Run parser unless ( defined $self->{'schema'} ) { eval { $parser_output = $parser->($self, $$data) }; if ($@ || ! $parser_output) { @@ -560,14 +488,25 @@ sub translate { return $self->error($msg); } } - $self->debug("Schema =\n", Dumper($self->schema), "\n"); + # Validate the schema if asked to. if ($self->validate) { my $schema = $self->schema; return $self->error('Invalid schema') unless $schema->is_valid; } + # Run filters + my $filt_num = 0; + foreach ($self->filters) { + $filt_num++; + my ($code,@args) = @$_; + eval { $code->($self->schema, @args) }; + my $err = $@ || $self->error || 0; + return $self->error("Error with filter $filt_num : $err") if $err; + } + + # Run producer eval { $producer_output = $producer->($self) }; if ($@ || ! $producer_output) { my $err = $@ || $self->error || "no results"; @@ -648,6 +587,67 @@ sub _args { } # ---------------------------------------------------------------------- +# Does the get/set work for parser and producer. e.g. +# return $self->_tool({ +# name => 'producer', +# path => "SQL::Translator::Producer", +# default_sub => "produce", +# }, @_); +# ---------------------------------------------------------------------- +sub _tool { + my ($self,$args) = (shift, shift); + my $name = $args->{name}; + return $self->{$name} unless @_; # get accessor + + my $path = $args->{path}; + my $default_sub = $args->{default_sub}; + my $tool = shift; + + # passed an anonymous subroutine reference + if (isa($tool, 'CODE')) { + $self->{$name} = $tool; + $self->{"$name\_type"} = "CODE"; + $self->debug("Got $name: code ref\n"); + } + + # 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, + # so we give it a go. + else { + $tool =~ s/-/::/g if $tool !~ /::/; + my ($code,$sub); + ($code,$sub) = _load_sub("$tool\::$default_sub", $path); + unless ($code) { + if ( __PACKAGE__->error =~ m/Can't find module/ ) { + # Mod not found so try sub + ($code,$sub) = _load_sub("$tool", $path) unless $code; + die "Can't load $name subroutine '$tool' : ".__PACKAGE__->error + unless $code; + } + else { + die "Can't load $name '$tool' : ".__PACKAGE__->error; + } + } + + # get code reference and assign + my (undef,$module,undef) = $sub =~ m/((.*)::)?(\w+)$/; + $self->{$name} = $code; + $self->{"$name\_type"} = $sub eq "CODE" ? "CODE" : $module; + $self->debug("Got $name: $sub\n"); + } + + # At this point, $self->{$name} contains a subroutine + # reference that is ready to run + + # Anything left? If so, it's args + my $meth = "$name\_args"; + $self->$meth(@_) if (@_); + + return $self->{$name}; +} + +# ---------------------------------------------------------------------- # _list($type) # ---------------------------------------------------------------------- sub _list { @@ -705,21 +705,60 @@ sub _list { } # ---------------------------------------------------------------------- -# load($module) +# load(MODULE [,PATH[,PATH]...]) # # Loads a Perl module. Short circuits if a module is already loaded. +# +# MODULE - is the name of the module to load. +# +# PATH - optional list of 'package paths' to look for the module in. e.g +# If you called load('Super::Foo' => 'My', 'Other') it will +# try to load the mod Super::Foo then My::Super::Foo then Other::Super::Foo. +# +# Returns package name of the module actually loaded or false and sets error. +# +# Note, you can't load a name from the root namespace (ie one without '::' in +# it), therefore a single word name without a path fails. # ---------------------------------------------------------------------- sub load { - my $module = do { my $m = shift; $m =~ s[::][/]g; "$m.pm" }; - return 1 if $INC{$module}; + my $name = shift; + my @path; + push @path, "" if $name =~ /::/; # Empty path to check name on its own first + push @path, @_ if @_; + + foreach (@path) { + my $module = $_ ? "$_\::$name" : $name; + my $file = $module; $file =~ s[::][/]g; $file .= ".pm"; + __PACKAGE__->debug("Loading $name as $file\n"); + return $module if $INC{$file}; # Already loaded + + eval { require $file }; + next if $@ =~ /Can't locate $file in \@INC/; + eval { $module->import() } unless $@; + return __PACKAGE__->error("Error loading $name as $module : $@") + if $@ && $@ !~ /"SQL::Translator::Producer" is not exported/; + + return $module; # Module loaded ok + } - eval { - require $module; - $module->import(@_); - }; + return __PACKAGE__->error("Can't find module $name. Path:".join(",",@path)); +} - return __PACKAGE__->error($@) if ($@); - return 1; +# ---------------------------------------------------------------------- +# Load the sub name given (including package), optionally using a base package +# path. Returns code ref and name of sub loaded, including its package. +# (\&code, $sub) = load_sub( 'MySQL::produce', "SQL::Translator::Producer" ); +# (\&code, $sub) = load_sub( 'MySQL::produce', @path ); +# ---------------------------------------------------------------------- +sub _load_sub { + my ($tool, @path) = @_; + + my (undef,$module,$func_name) = $tool =~ m/((.*)::)?(\w+)$/; + if ( my $module = load($module => @path) ) { + my $sub = "$module\::$func_name"; + return wantarray ? ( \&{ $sub }, $sub ) : \&$sub; + } + return undef; } # ---------------------------------------------------------------------- @@ -743,7 +782,7 @@ sub format_pk_name { } # ---------------------------------------------------------------------- -# The other format_*_name methods rely on this one. It optionally +# The other format_*_name methods rely on this one. It optionally # accepts a subroutine ref as the first argument (or uses an identity # sub if one isn't provided or it doesn't already exist), and applies # it to the rest of the arguments (if any). @@ -816,15 +855,15 @@ SQL::Translator - manipulate structured data definitions (SQL and more) # Print debug info debug => 1, # Print Parse::RecDescent trace - trace => 0, + trace => 0, # Don't include comments in output - no_comments => 0, + no_comments => 0, # Print name mutations, conflicts - show_warnings => 0, + show_warnings => 0, # Add "drop table" statements - add_drop_table => 1, + add_drop_table => 1, # Validate schema object - validate => 1, + validate => 1, # Make all table names CAPS in producers which support this option format_table_name => sub {my $tablename = shift; return uc($tablename)}, # Null-op formatting, only here for documentation's sake @@ -837,7 +876,7 @@ SQL::Translator - manipulate structured data definitions (SQL and more) from => 'MySQL', to => 'Oracle', # Or an arrayref of filenames, i.e. [ $file1, $file2, $file3 ] - filename => $file, + filename => $file, ) or die $translator->error; print $output; @@ -886,6 +925,10 @@ producer_args =item * +filters + +=item * + filename / file =item * @@ -1023,6 +1066,56 @@ entirety of the data to be parsed. There is also C and C, which perform analogously to C and C +=head2 filters + +Set or retreive the filters to run over the schema during the +translation, before the producer creates its output. Filters are sub +routines called, in order, with the schema object to filter as the 1st +arg and a hash of options (passed as a list) for the rest of the args. +They are free to do whatever they want to the schema object, which will be +handed to any following filters, then used by the producer. + +Filters are set as an array, which gives the order they run in. +Like parsers and producers, they can be defined by a module name, a +module name relative to the SQL::Translator::Filter namespace, a module +name and function name together or a reference to an anonymous subroutine. +When using a module name a function called C will be invoked in +that package to do the work. + +To pass args to the filter set it as an array ref with the 1st value giving +the filter (name or sub) and the rest its args. e.g. + + $tr->filters( + sub { + my $schema = shift; + # Do stuff to schema here! + }, + DropFKeys, + [ "Names", table => 'lc' ], + [ "Foo", foo => "bar", hello => "world" ], + [ "Filter5" ], + ); + +Although you normally set them in the constructor, which calls +through to filters. i.e. + + my $translator = SQL::Translator->new( + ... + filters => [ + sub { ... }, + [ "Names", table => 'lc' ], + ], + ... + ); + +See F for more examples. + +Multiple set calls to filters are cumulative with new filters added to +the end of the current list. + +Returns the filters as a list of array refs, the 1st value being a +reference to the filter sub and the rest its args. + =head2 show_warnings Toggles whether to print warnings of name conflicts, identifier @@ -1033,11 +1126,12 @@ current value. =head2 translate -The C method calls the subroutines referenced by the -C and C data members (described above). It accepts -as arguments a number of things, in key => value format, including -(potentially) a parser and a producer (they are passed directly to the -C and C methods). +The C method calls the subroutine referenced by the +C data member, then calls any C and finally calls +the C sub routine (these members are described above). +It accepts as arguments a number of things, in key => value format, +including (potentially) a parser and a producer (they are passed +directly to the C and C methods). Here is how the parameter list to C is parsed: