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joko |
1.1 |
# (c) Sound Object Logic 2000-2001 |
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use strict; |
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package Tangram::AbstractHash; |
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use Tangram::Coll; |
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jonen |
1.3 |
use vars qw(@ISA); |
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@ISA = qw( Tangram::Coll ); |
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joko |
1.1 |
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use Carp; |
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sub content |
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{ |
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shift; |
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@{shift()}; |
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} |
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sub demand |
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{ |
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my ($self, $def, $storage, $obj, $member, $class) = @_; |
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print $Tangram::TRACE "loading $member\n" if $Tangram::TRACE; |
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jonen |
1.3 |
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joko |
1.1 |
my %coll; |
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if (my $prefetch = $storage->{PREFETCH}{$class}{$member}{$storage->id($obj)}) |
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{ |
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%coll = %$prefetch; |
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} |
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else |
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{ |
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my $cursor = $self->cursor($def, $storage, $obj, $member); |
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jonen |
1.3 |
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joko |
1.1 |
for (my $item = $cursor->select; $item; $item = $cursor->next) |
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{ |
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my $slot = shift @{ $cursor->{-residue} }; |
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$coll{$slot} = $item; |
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} |
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} |
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jonen |
1.3 |
$self->set_load_state($storage, $obj, $member, { map { $_ => ($coll{$_} && $storage->id( $coll{$_} ) ) } keys %coll } ); |
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joko |
1.1 |
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return \%coll; |
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} |
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joko |
1.2 |
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sub save_content |
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{ |
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my ($obj, $field, $context) = @_; |
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# has collection been loaded? if not, then it hasn't been modified |
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return if tied $obj->{$field}; |
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return unless exists $obj->{$field} && defined $obj->{$field}; |
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my $storage = $context->{storage}; |
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foreach my $item (values %{ $obj->{$field} }) { |
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$storage->insert($item) |
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unless $storage->id($item); |
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} |
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} |
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sub get_exporter |
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{ |
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my ($self, $context) = @_; |
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my $field = $self->{name}; |
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return sub { |
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my ($obj, $context) = @_; |
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return if tied $obj->{$field}; |
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return unless exists $obj->{$field} && defined $obj->{$field}; |
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my $storage = $context->{storage}; |
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foreach my $item (values %{ $obj->{$field} }) { |
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$storage->insert($item) |
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unless $storage->id($item); |
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} |
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$context->{storage}->defer(sub { $self->defered_save($obj, $field, $storage) } ); |
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(); |
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} |
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} |
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joko |
1.1 |
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