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package BookDB;
use strict;
use warnings;
my $dbh;
my $bind = '';
my $oldq = '';
sub new {
my $self = shift;
# create an attributes hash
my $atts = {
'sql' => undef,
'res' => [0],
};
# create the object
bless $atts, $self;
$dbh = $atts;
return $atts;
}
use Data::Dumper;
my @miles1 = (
['book1', 'Lawrence Miles'],
['book2', 'Lawrence Miles'],
['book3', 'Lawrence Miles'],
['book4', 'Lawrence Miles'],
['book5', 'Lawrence Miles'],
['book6', 'Lawrence Miles'],
['book7', 'Lawrence Miles']);
my @miles2 = (
{title=>'book1', author=>'Lawrence Miles'},
{title=>'book2', author=>'Lawrence Miles'},
{title=>'book3', author=>'Lawrence Miles'},
{title=>'book4', author=>'Lawrence Miles'},
{title=>'book5', author=>'Lawrence Miles'},
{title=>'book6', author=>'Lawrence Miles'},
{title=>'book7', author=>'Lawrence Miles'});
my @miles3 = (
7,
);
my @lance = (
{title=>'book1', author=>'Lance Parkin'},
{title=>'book2', author=>'Lance Parkin'},
{title=>'book3', author=>'Lance Parkin'},
{title=>'book4', author=>'Lance Parkin'},
{title=>'book5', author=>'Lance Parkin'},
{title=>'book6', author=>'Lance Parkin'},
{title=>'book7', author=>'Lance Parkin'});
my @magrs = (
{title=>'book1', author=>'Paul Magrs'},
{title=>'book2', author=>'Paul Magrs'},
{title=>'book3', author=>'Paul Magrs'});
sub prepare {
shift; #print STDERR "\n#prepare=".Dumper(\@_);
$dbh->{sql} = shift;
$dbh->{cache} = shift;
$dbh
}
sub prepare_cached {
shift; #print STDERR "\n#prepare_cached=".Dumper(\@_);
$dbh->{sql} = shift;
$dbh->{cache} = shift;
$dbh
}
sub rebind {
shift;
$dbh->{sql} = $dbh->{cache};
}
sub bind_param {
shift;
#print STDERR "\n#bind_param(@_)\n";
$bind = $_[1];
return;
}
sub execute {
shift;
my $query = $dbh->{sql} || $oldq;
my $arg = @_ ? (scalar @_ > 1 ? $_[1] : $_[0]) : $bind;
$bind = $arg;
$oldq = $query;
return unless($query);
if($query =~ /select title,author from books where author/) {
if($arg && $arg =~ /Lawrence Miles/) {
$dbh->{array} = \@miles1;
$dbh->{hash} = \@miles2;
}
}
if($query =~ /select count(1) from books where author/) {
$dbh->{res} = \@miles3 if($arg && $arg =~ /Lawrence Miles/);
}
if($query =~ /select class,title,author from books where author/) {
if($arg && $arg =~ /Lance Parkin/) {
my @list = @lance;
$dbh->{hash} = \@list;
}
if($arg && $arg =~ /Paul Magrs/) {
$dbh->{hash} = \@magrs;
}
if($arg && $arg =~ /Lawrence Miles/) {
my @list = @miles2;
$dbh->{hash} = \@list;
}
}
$dbh->{Active} = 1;
}
sub fetchrow_hashref {
return shift @{$dbh->{hash}}}
sub fetchall_arrayref {
return \@{$dbh->{array}}}
sub fetchrow_array {
return (7)}
sub finish {
$dbh->{Active} = 0;
$dbh->{sql} = undef;
}
sub can { 1 }
DESTROY { }
END { }
1;
|
