package SQL::Translator::Parser::xSV;
-#-----------------------------------------------------
-# $Id: xSV.pm,v 1.1 2002-03-25 14:27:23 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 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
-# -------------------------------------------------------------------
+=head1 NAME
+
+SQL::Translator::Parser::xSV - parser for arbitrarily delimited text files
+
+=head1 SYNOPSIS
+
+ use SQL::Translator;
+ use SQL::Translator::Parser::xSV;
+
+ my $translator = SQL::Translator->new(
+ parser => 'xSV',
+ parser_args => { field_separator => "\t" },
+ );
+
+=head1 DESCRIPTION
+
+Parses arbitrarily delimited text files. See the
+Text::RecordParser manpage for arguments on how to parse the file
+(e.g., C<field_separator>, C<record_separator>). Other arguments
+include:
+
+=head1 OPTIONS
+
+=over
+
+=item * scan_fields
+
+Indicates that the columns should be scanned to determine data types
+and field sizes. True by default.
+
+=item * trim_fields
+
+A shortcut to sending filters to Text::RecordParser, will create
+callbacks that trim leading and trailing spaces from fields and headers.
+True by default.
+
+=back
+
+Field names will automatically be normalized by
+C<SQL::Translator::Utils::normalize_name>.
+
+=cut
use strict;
-use vars qw($VERSION @EXPORT);
-$VERSION = sprintf "%d.%02d", q$Revision: 1.1 $ =~ /(\d+)\.(\d+)/;
+use warnings;
+our @EXPORT;
+our $VERSION = '1.59';
use Exporter;
use Text::ParseWords qw(quotewords);
+use Text::RecordParser;
+use SQL::Translator::Utils qw(debug normalize_name);
use base qw(Exporter);
@EXPORT = qw(parse);
+#
# Passed a SQL::Translator instance and a string containing the data
+#
sub parse {
- my ($tr, $data) = @_;
-
- # Skeleton structure, mostly empty
- my $parsed = {
- table1 => {
- "type" => undef,
- "indeces" => [ { } ],
- "fields" => { },
- },
- };
-
- # Discard all but the first line
- $data = (split m,$/,, $data)[0];
-
- my @parsed = quotewords(',\s*', 0, $data);
-
- for (my $i = 0; $i < @parsed; $i++) {
- $parsed->{"table1"}->{"fields"}->{$parsed[$i]} = {
- type => "field",
- order => $i,
- name => $parsed[$i],
-
- # Default datatype is "char"
- data_type => "char",
-
- # default size is 8bits; something more reasonable?
- size => 255,
- null => 1,
- default => "",
- is_auto_inc => undef,
-
- # field field is the primary key
- is_primary_key => ($i == 0) ? 1 : undef,
+ my ( $tr, $data ) = @_;
+ my $args = $tr->parser_args;
+ my $parser = Text::RecordParser->new(
+ field_separator => $args->{'field_separator'} || ',',
+ record_separator => $args->{'record_separator'} || "\n",
+ data => $data,
+ header_filter => \&normalize_name,
+ );
+
+ $parser->field_filter( sub { $_ = shift || ''; s/^\s+|\s+$//g; $_ } )
+ unless defined $args->{'trim_fields'} && $args->{'trim_fields'} == 0;
+
+ my $schema = $tr->schema;
+ my $table = $schema->add_table( name => 'table1' );
+
+ #
+ # Get the field names from the first row.
+ #
+ $parser->bind_header;
+ my @field_names = $parser->field_list;
+
+ for ( my $i = 0; $i < @field_names; $i++ ) {
+ my $field = $table->add_field(
+ name => $field_names[$i],
+ data_type => 'char',
+ default_value => '',
+ size => 255,
+ is_nullable => 1,
+ is_auto_increment => undef,
+ ) or die $table->error;
+
+ if ( $i == 0 ) {
+ $table->primary_key( $field->name );
+ $field->is_primary_key(1);
}
}
- # Field 0 is primary key, by default, so add an index
- for ($parsed->{"table1"}->{"indeces"}->[0]) {
- $_->{"type"} = "primary_key";
- $_->{"name"} = undef;
- $_->{"fields"} = [ $parsed[0] ];
+ #
+ # If directed, look at every field's values to guess size and type.
+ #
+ unless (
+ defined $args->{'scan_fields'} &&
+ $args->{'scan_fields'} == 0
+ ) {
+ my %field_info = map { $_, {} } @field_names;
+ while ( my $rec = $parser->fetchrow_hashref ) {
+ for my $field ( @field_names ) {
+ my $data = defined $rec->{ $field } ? $rec->{ $field } : '';
+ my $size = [ length $data ];
+ my $type;
+
+ if ( $data =~ /^-?\d+$/ ) {
+ $type = 'integer';
+ }
+ elsif (
+ $data =~ /^-?[,\d]+\.[\d+]?$/
+ ||
+ $data =~ /^-?[,\d]+?\.\d+$/
+ ||
+ $data =~ /^-?\.\d+$/
+ ) {
+ $type = 'float';
+ my ( $w, $d ) =
+ map { s/,//g; length $_ || 1 } split( /\./, $data );
+ $size = [ $w + $d, $d ];
+ }
+ else {
+ $type = 'char';
+ }
+
+ for my $i ( 0, 1 ) {
+ next unless defined $size->[ $i ];
+ my $fsize = $field_info{ $field }{'size'}[ $i ] || 0;
+ if ( $size->[ $i ] > $fsize ) {
+ $field_info{ $field }{'size'}[ $i ] = $size->[ $i ];
+ }
+ }
+
+ $field_info{ $field }{ $type }++;
+ }
+ }
+
+ for my $field ( keys %field_info ) {
+ my $size = $field_info{ $field }{'size'} || [ 1 ];
+ my $data_type =
+ $field_info{ $field }{'char'} ? 'char' :
+ $field_info{ $field }{'float'} ? 'float' :
+ $field_info{ $field }{'integer'} ? 'integer' : 'char';
+
+ if ( $data_type eq 'char' && scalar @$size == 2 ) {
+ $size = [ $size->[0] + $size->[1] ];
+ }
+
+ my $field = $table->get_field( $field );
+ $field->size( $size );
+ $field->data_type( $data_type );
+ }
}
- return $parsed;
+ return 1;
}
-
1;
-__END__
+
+=pod
+
+=head1 AUTHORS
+
+Darren Chamberlain E<lt>darren@cpan.orgE<gt>,
+Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
+
+=head1 SEE ALSO
+
+Text::RecordParser, SQL::Translator.
+
+=cut
projects / dbsrgits/SQL-Translator.git / blobdiff