1 package DBIx::Data::Collection::Set;
4 use Method::Signatures::Simple;
5 use Data::Perl::Stream::Array;
7 has _store => (is => 'ro', required => 1, init_arg => 'store');
9 has _class => (is => 'ro', predicate => '_has_class');
11 has _set_over => (is => 'ro', required => 1, init_arg => 'set_over');
13 ## member cache (all members)
15 has _member_cache => (
16 is => 'rw', lazy_build => 1,
17 predicate => '_member_cache_built',
20 method _build__member_cache {
21 my $stream = $self->_new_raw_stream;
23 while (my ($raw) = $stream->next) {
25 if (my ($obj) = $self->_key_cache_get_raw($raw)) {
26 $self->_merge($obj, $raw)
28 $self->_add_to_key_cache($self->_inflate($raw))
36 method _add_to_member_cache ($to_add) {
37 return $to_add unless $self->_member_cache_built;
38 push @{$self->_member_cache}, $to_add;
42 method _remove_from_member_cache ($to_remove) {
43 return $to_remove unless $self->_member_cache_built;
44 @{$self->_member_cache} = grep $_ ne $to_remove, @{$self->_member_cache};
48 ## key cache - by primary/unique key
50 has _key_cache => (is => 'ro', default => sub { {} });
52 method _add_to_key_cache ($to_add) {
53 $self->_key_cache->{$self->_object_to_id($to_add)} = $to_add;
57 method _remove_from_key_cache ($to_remove) {
58 # should return $to_remove
59 delete $self->_key_cache->{$self->_object_to_id($to_remove)}
62 method _key_cache_has_raw ($raw) {
63 exists $self->_key_cache->{$self->_raw_to_id($raw)}
66 method _key_cache_has_object ($obj) {
67 exists $self->_key_cache->{$self->_object_to_id($obj)}
70 method _key_cache_get_raw ($raw) {
71 my $id = $self->_raw_to_id($raw);
72 exists $self->_key_cache->{$id}
73 ? ($self->_key_cache->{$id})
77 method _key_cache_get_object ($obj) {
78 $self->_key_cache_get_raw($self->_deflate($obj))
83 method _new_raw_stream {
84 $self->_store->new_select_command([])->execute
87 ## thunking between the store representation and the set representation
89 # _inflate is raw data -> final repr
90 # _deflate is final repr -> raw data
91 # _merge takes final repr + raw data and updates the repr
92 # (this is used for pk-generated values and later lazy loading)
94 method _inflate ($raw) {
95 bless($raw, $self->_class) if $self->_has_class;
99 method _deflate ($obj) {
103 method _merge ($obj, $raw) {
104 @{$obj}{keys %$raw} = values %$raw;
108 ## methods to get ids
110 method _raw_to_id ($raw) {
111 # XXX must escape this. or do something else.
112 join ';', map $raw->{$_}, @{$self->_set_over}
115 method _object_to_id ($obj) {
116 $self->_raw_to_id($self->_deflate($obj))
119 ## array-ish operations - i.e. get all members
122 @{$self->_member_cache};
126 Data::Perl::Stream::Array->new(array => $self->_member_cache);
132 $self->_add_to_store($new);
133 $self->_add_to_caches($new);
137 method _add_to_store ($new) {
138 my $new_raw = $self->_deflate($new);
139 $self->_merge($new, $self->_store->new_insert_command($new_raw)->execute);
143 method _add_to_caches ($new) {
144 $self->_add_to_member_cache($new);
145 $self->_add_to_key_cache($new);
151 method remove ($old) {
152 $self->_remove_from_store($old);
153 $self->_remove_from_caches($old);
157 method _remove_from_store ($old) {
158 $self->_store->new_delete_command($self->_deflate($old))->execute;
161 method _remove_from_caches ($old) {
162 $self->_remove_from_member_cache($old);
163 $self->_remove_from_key_cache($old);