1 package DX::DependencyMap;
3 use DX::Utils qw(CONTENTS_OF INDICES_OF);
6 # { x => [ { y => [ ...
7 # my $targ = $root; $targ = $targ->[0]{$_[0]} for @path
8 # my $deps = $targ->[$${$dep_type}];
10 has deps => (is => 'ro', isa => DependencyTree, required => 1);
12 has revdeps => (is => 'ro', required => 1);
16 $class->new(deps => {}, revdeps => {});
20 my ($self, $for_id, $deps_for) = @_;
25 my $new_deps = $self->_merge_deps_for(
26 $self->deps, $for_id, @$deps_for
30 revdeps => $new_revdeps
34 sub without_entries_for {
35 my ($self, @for_ids) = @_;
36 my %new_revdeps = %{$self->revdeps};
37 my $new_deps = $self->deps;
38 $new_deps = $self->_unmerge_deps_for(
39 $new_deps, $_, @{$new_revdeps{$_}}
41 delete @new_revdeps{@for_ids};
44 revdeps => \%new_revdeps
49 my ($self, $deps, $for_id, @merge_these) = @_;
50 $self->_mangle_deps($deps, sub {
51 +{ %{$_[0]}, $for_id => 1 };
55 sub _unmerge_deps_for {
56 my ($self, $deps, $for_id, @unmerge_these) = @_;
57 $self->_mangle_deps($deps, sub {
58 my %for_ids = %{$_[0]};
59 delete $for_ids{$for_id};
65 my ($self, $deps, $mangler, @to_mangle) = @_;
67 foreach my $mangle_this (@to_mangle) {
68 assert_DependencySpec $mangle_this;
69 my ($type, @path) = @$mangle_this;
71 foreach my $part (@path) {
72 my $sub = $targ->[0] = { %{$targ->[0]||{}} };
73 $targ = $sub->{$part} = [ @{$sub->{$part}||[]} ];
75 $targ->[$$$type] = $mangler->($targ->[$$$type]||{});
81 my ($self, $event) = @_;
82 my ($type, @path) = @$event;
83 my $root = [ $self->deps ];
87 foreach my $part (@path) {
88 $targ = $targ->[0]{$part};
89 # set/add/remove x.y or x.y.z affects contents of x
90 push @dep_sets, $targ->[$${+CONTENTS_OF}];
93 # add/remove x.y affects indices of x
94 push @dep_sets, $targ->[$${+INDICES_OF}];
96 $targ = $targ->[0]{$last};
98 # add/remove x affects existence of x
99 # set/add/remove x affects everything else too
100 push @dep_sets, @{$targ}[map $$$_, @$$type];
102 # set/add/remove x affects all dependencies on x.y, x.y.z etc.
103 my @q = values %{$targ->[0]};
104 while (my $el = shift @q) {
105 my ($el_kids, @el_deps) = @$el;
106 push @dep_sets, @el_deps;
107 push @q, values %{$el_kids||{}};
110 map +($_ => 1), map keys %$_, grep defined, @dep_sets
114 sub but_expire_dependents_of {
115 my ($self, @events) = @_;
116 my @expired = keys %{{
117 map +($_ => 1), map $self->_dependents_of($_), @events
119 # Didn't expire anything? Don't clone self
120 return $self unless @expired;
121 ($self->without_entries_for(@expired), @expired);
124 sub dependencies_for { $_[0]->revdeps->{$_[1]} }