/usr/share/perl5/Tangram/Type/Abstract/Array.pm is in libtangram-perl 2.10-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | use strict;
use Tangram::Type::Abstract::Coll;
package Tangram::Type::Abstract::Array;
use vars qw(@ISA);
@ISA = qw( Tangram::Type::Abstract::Coll );
use Carp;
sub demand
{
my ($self, $def, $storage, $obj, $member, $class) = @_;
my (@coll, @lost);
if (my $prefetch = $storage->{PREFETCH}{$class}{$member}{$storage->export_object($obj)})
{
print $Tangram::TRACE "demanding ".$storage->id($obj)
.".$member from prefetch\n" if $Tangram::TRACE;
@coll = @$prefetch;
}
else
{
print $Tangram::TRACE "demanding ".$storage->id($obj)
.".$member from storage\n" if $Tangram::TRACE;
my $cursor = $self->cursor($def, $storage, $obj, $member);
for (my $item = $cursor->select(); $item; $item = $cursor->next)
{
my $slot = shift @{ $cursor->{-residue} };
if (defined $slot) {
$coll[$slot] = $item;
} else {
warn "object ".$storage->id($item)." has no slot in array ".$storage->id($obj)."/$member!";
push @lost, $item
}
}
# last-ditch effort to automatically DTRT
if (@lost) {
foreach(@coll) {
if (!defined $_) {
$_ = shift @lost;
}
last unless @lost;
}
push @coll, @lost;
}
}
$self->set_load_state($storage, $obj, $member, [ map { ($_) ? $storage->id($_) : undef } @coll ]);
return \@coll;
}
sub get_export_cols
{
return (); # arrays are not stored on object's table
}
sub save_content
{
my ($obj, $field, $context) = @_;
# has collection been loaded? if not, then it hasn't been modified
my $tied = tied $obj->{$field};
my $storage = $context->{storage};
if ($tied and $tied->can("storage")
and $tied->storage == $storage ) {
#print STDERR "not saving $obj -> {$field} (tied = $tied)\n";
return;
}
foreach my $item (@{ $obj->{$field} }) {
$storage->insert($item)
unless $storage->id($item);
}
}
sub deep_save_content
{
my ($obj, $field, $context) = @_;
# has collection been loaded? if not, then it hasn't been modified
return if tied $obj->{$field};
my $storage = $context->{storage};
foreach my $item (@{$obj->{$field}}) {
$storage->_save($item, $context->{SAVING});
}
}
sub check_content
{
my ($obj, $field, $coll, $class) = @_;
foreach my $item ($obj->{$field}) {
Tangram::Type::Abstract::Coll::bad_type($obj, $field, $class, $item)
unless $item->isa($class);
}
}
sub get_exporter
{
my ($self, $context) = @_;
my $save_content = $self->{deep_update} ? \&deep_save_content : \&save_content;
my $field = $self->{name};
return sub {
my ($obj, $context) = @_;
$save_content->($obj, $self->{name}, $context);
$context->{storage}->defer(sub { $self->defered_save(shift, $obj, $field, $self) } );
();
}
}
sub defered_save
{
use integer;
my ($self, $storage, $obj, $field, $def) = @_;
return if tied $obj->{$field}; # collection has not been loaded, thus not modified
my $coll_id = $storage->id($obj);
my ($ne, $modify, $add, $remove) =
$self->get_save_closures($storage, $obj, $def, $storage->id($obj));
my $new_state = $obj->{$field} || [];
my $new_size = @$new_state;
my $old_state = $self->get_load_state($storage, $obj, $field) || [];
my $old_size = @$old_state;
my ($common, $changed) = Tangram::Type::Abstract::Coll::array_diff($new_state, $old_state, $ne);
for my $slot (@$changed)
{
$modify->($slot, $new_state->[$slot], $old_state->[$slot]);
}
for my $slot ($old_size .. ($new_size-1))
{
$add->($slot, $new_state->[$slot]);
}
if ($old_size > $new_size)
{
$remove->($new_size, $old_size);
}
$self->set_load_state($storage, $obj, $field, [ @$new_state ] );
$storage->tx_on_rollback( sub { $self->set_load_state($storage, $obj, $field, $old_state) } );
}
1;
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