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# -*- Mode: Perl -*- |
# -*- Mode: Cperl -*- |
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# Index.pm -- |
# Index.pm -- |
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# ITIID : $ITI$ $Header $__Header$ |
# ITIID : $ITI$ $Header $__Header$ |
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# Author : Ulrich Pfeifer |
# Author : Ulrich Pfeifer |
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# Created On : Thu Aug 8 13:05:10 1996 |
# Created On : Thu Aug 8 13:05:10 1996 |
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# Last Modified By: Ulrich Pfeifer |
# Last Modified By: Ulrich Pfeifer |
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# Last Modified On: Sun Nov 22 18:44:43 1998 |
# Last Modified On: Sat Apr 27 18:06:47 2002 |
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# Language : CPerl |
# Language : CPerl |
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# Update Count : 107 |
# Update Count : 128 |
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# Status : Unknown, Use with caution! |
# Status : Unknown, Use with caution! |
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# |
# |
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# Copyright (c) 1996-1997, Ulrich Pfeifer |
# Copyright (c) 1996-1997, Ulrich Pfeifer |
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package WAIT::Index; |
package WAIT::Index; |
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use WAIT::IndexScan; |
use WAIT::IndexScan; |
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use strict; |
use strict; |
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use DB_File; |
use BerkeleyDB; |
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use Fcntl; |
use Fcntl; |
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use vars qw($VERSION); |
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sub fail { |
$VERSION = "1.801"; # Table.pm tests if we are loaded by checking $VERSION |
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$@ .= join "\n", @_; |
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return undef; |
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} |
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sub new { |
sub new { |
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my $type = shift; |
my $type = shift; |
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my %parm = @_; |
my %parm = @_; |
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my $self = {}; |
my $self = {}; |
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$self->{file} = $parm{file} or return fail("No file specified"); |
unless ($self->{file} = $parm{file}) { |
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$self->{attr} = $parm{attr} or return fail("No attributes specified"); |
require Carp; |
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Carp::croak("No file specified"); |
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} |
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unless ($self->{name} = $parm{name}) { |
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require Carp; |
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Carp::croak("No name specified"); |
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} |
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unless ($self->{attr} = $parm{attr}) { |
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require Carp; |
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Carp::croak("No attributes specified"); |
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} |
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bless $self, ref($type) || $type; |
bless $self, ref($type) || $type; |
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} |
} |
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my $self = shift; |
my $self = shift; |
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if ((caller)[0] eq 'WAIT::Table') { # Table knows about this |
if ((caller)[0] eq 'WAIT::Table') { # Table knows about this |
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my $file = $self->{file}; |
my $file = $self->{file}; |
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! (!-e $file or unlink $file); |
! (!-e $file or unlink $file); |
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} else { # notify our database |
} else { # notify our database |
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fail ref($self)."::drop called directly"; |
require Carp; |
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Carp::croak(ref($self)."::drop called directly"); |
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} |
} |
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} |
} |
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my $self = shift; |
my $self = shift; |
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my $file = $self->{file}; |
my $file = $self->{file}; |
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if (exists $self->{dbh}) { |
if ($self->{dbh}) { |
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$self->{dbh}; |
$self->{dbh}; |
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} else { |
} else { |
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$self->{dbh} = tie(%{$self->{db}}, 'DB_File', $file, |
my $dbmode = ($self->{mode} & O_CREAT) ? DB_CREATE : 0; |
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$self->{mode}, 0664, $DB_BTREE); |
$self->{dbh} = tie(%{$self->{db}}, 'BerkeleyDB::Btree', |
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-Filename => $self->{file}, |
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-Subname => 'records', |
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-Flags => $dbmode, |
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-Mode => 0664); |
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} |
} |
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} |
} |
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# duplicate entry |
# duplicate entry |
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return undef; |
return undef; |
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} |
} |
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print STDERR "$tuple => $key\n"; |
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$self->{db}->{$tuple} = $key; |
$self->{db}->{$tuple} = $key; |
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} |
} |
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my $tuple = join($;, map($parm{$_}, @{$self->{attr}})); |
my $tuple = join($;, map($parm{$_}, @{$self->{attr}})); |
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exists $self->{db}->{$tuple} && $self->{db}->{$tuple}; |
print STDERR "$tuple <= ", $self->{db}->{$tuple}, "\n"; |
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$self->{db}->{$tuple}; |
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} |
} |
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sub fetch { |
sub fetch { |
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my $self = shift; |
my $self = shift; |
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my %parm = @_; |
my %parm = @_; |
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my @keys = @{$self->{attr}->[0]}; |
my @keys = @{$self->{attr}->[0]}; |
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defined $self->{db} or $self->open; |
defined $self->{db} or $self->open; |
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my $key = join($;, map($parm{$_}, @keys)); |
my $key = join($;, map($parm{$_}, @keys)); |
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defined $self->{db} or $self->open; |
defined $self->{db} or $self->open; |
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my $tuple = join($;, map($parm{$_}, @{$self->{attr}})); |
my $tuple = join($;, map($parm{$_}||"", @{$self->{attr}})); |
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delete $self->{db}->{$tuple}; |
delete $self->{db}->{$tuple}; |
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} |
} |
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sub sync { |
sub sync { |
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my $self = shift; |
my $self = shift; |
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$self->{dbh}->sync if $self->{dbh}; |
$self->{dbh}->db_sync if $self->{dbh}; |
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} |
} |
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sub close { |
sub close { |
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if ($self->{dbh}) { |
if ($self->{dbh}) { |
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delete $self->{dbh}; |
delete $self->{dbh}; |
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untie %{$self->{db}}; |
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delete $self->{db}; |
delete $self->{db}; |
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#untie %{$self->{db}}; |
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} |
} |
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} |
} |
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sub open_scan { |
sub open_scan { |
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my $self = shift; |
my $self = shift; |
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my $code = shift; |
my $code = shift; |
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$self->{dbh} or $self->open; |
$self->{dbh} or $self->open; |
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new WAIT::IndexScan $self, $code; |
new WAIT::IndexScan $self, $code; |
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} |
} |