Commit | Line | Data |
---|---|---|
6fe26b29 | 1 | package DBM::Deep::Hash; |
2 | ||
460b1067 | 3 | use 5.6.0; |
4 | ||
6fe26b29 | 5 | use strict; |
460b1067 | 6 | use warnings; |
6fe26b29 | 7 | |
8 | use base 'DBM::Deep'; | |
9 | ||
596e9574 | 10 | sub _get_self { |
a4e2db58 | 11 | eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0] |
596e9574 | 12 | } |
13 | ||
f9c33187 | 14 | sub _repr { shift;return { @_ } } |
15 | ||
16 | sub _import { | |
17 | my $self = shift; | |
18 | my ($struct) = @_; | |
19 | ||
20 | eval { | |
21 | local $SIG{'__DIE__'}; | |
22 | foreach my $key (keys %$struct) { | |
23 | $self->put($key, $struct->{$key}); | |
24 | } | |
25 | }; if ($@) { | |
26 | $self->_throw_error("Cannot import: type mismatch"); | |
27 | } | |
28 | ||
29 | return 1; | |
30 | } | |
31 | ||
6fe26b29 | 32 | sub TIEHASH { |
33 | ## | |
34 | # Tied hash constructor method, called by Perl's tie() function. | |
35 | ## | |
36 | my $class = shift; | |
0ca7ea98 | 37 | my $args = $class->_get_args( @_ ); |
6fe26b29 | 38 | |
39 | $args->{type} = $class->TYPE_HASH; | |
40 | ||
41 | return $class->_init($args); | |
42 | } | |
43 | ||
cb79ec85 | 44 | sub FETCH { |
45 | my $self = shift->_get_self; | |
460b1067 | 46 | my $key = ($self->_fileobj->{filter_store_key}) |
47 | ? $self->_fileobj->{filter_store_key}->($_[0]) | |
cb79ec85 | 48 | : $_[0]; |
49 | ||
50 | return $self->SUPER::FETCH( $key ); | |
51 | } | |
52 | ||
81d3d316 | 53 | sub STORE { |
54 | my $self = shift->_get_self; | |
460b1067 | 55 | my $key = ($self->_fileobj->{filter_store_key}) |
56 | ? $self->_fileobj->{filter_store_key}->($_[0]) | |
81d3d316 | 57 | : $_[0]; |
58 | my $value = $_[1]; | |
59 | ||
60 | return $self->SUPER::STORE( $key, $value ); | |
61 | } | |
62 | ||
baa27ab6 | 63 | sub EXISTS { |
64 | my $self = shift->_get_self; | |
460b1067 | 65 | my $key = ($self->_fileobj->{filter_store_key}) |
66 | ? $self->_fileobj->{filter_store_key}->($_[0]) | |
baa27ab6 | 67 | : $_[0]; |
68 | ||
69 | return $self->SUPER::EXISTS( $key ); | |
70 | } | |
71 | ||
feaf1e6f | 72 | sub DELETE { |
73 | my $self = shift->_get_self; | |
460b1067 | 74 | my $key = ($self->_fileobj->{filter_store_key}) |
75 | ? $self->_fileobj->{filter_store_key}->($_[0]) | |
feaf1e6f | 76 | : $_[0]; |
77 | ||
78 | return $self->SUPER::DELETE( $key ); | |
79 | } | |
80 | ||
6fe26b29 | 81 | sub FIRSTKEY { |
82 | ## | |
83 | # Locate and return first key (in no particular order) | |
84 | ## | |
eea0d863 | 85 | my $self = shift->_get_self; |
6fe26b29 | 86 | |
87 | ## | |
6fe26b29 | 88 | # Request shared lock for reading |
89 | ## | |
90 | $self->lock( $self->LOCK_SH ); | |
91 | ||
6736c116 | 92 | my $result = $self->{engine}->get_next_key($self); |
6fe26b29 | 93 | |
94 | $self->unlock(); | |
95 | ||
460b1067 | 96 | return ($result && $self->_fileobj->{filter_fetch_key}) |
97 | ? $self->_fileobj->{filter_fetch_key}->($result) | |
6fe26b29 | 98 | : $result; |
99 | } | |
100 | ||
101 | sub NEXTKEY { | |
102 | ## | |
103 | # Return next key (in no particular order), given previous one | |
104 | ## | |
eea0d863 | 105 | my $self = shift->_get_self; |
6fe26b29 | 106 | |
460b1067 | 107 | my $prev_key = ($self->_fileobj->{filter_store_key}) |
108 | ? $self->_fileobj->{filter_store_key}->($_[0]) | |
eea0d863 | 109 | : $_[0]; |
6fe26b29 | 110 | |
612969fb | 111 | my $prev_md5 = $self->{engine}{digest}->($prev_key); |
6fe26b29 | 112 | |
113 | ## | |
6fe26b29 | 114 | # Request shared lock for reading |
115 | ## | |
116 | $self->lock( $self->LOCK_SH ); | |
117 | ||
6736c116 | 118 | my $result = $self->{engine}->get_next_key( $self, $prev_md5 ); |
6fe26b29 | 119 | |
120 | $self->unlock(); | |
121 | ||
460b1067 | 122 | return ($result && $self->_fileobj->{filter_fetch_key}) |
123 | ? $self->_fileobj->{filter_fetch_key}->($result) | |
6fe26b29 | 124 | : $result; |
125 | } | |
126 | ||
127 | ## | |
128 | # Public method aliases | |
129 | ## | |
f9c33187 | 130 | sub first_key { (shift)->FIRSTKEY(@_) } |
131 | sub next_key { (shift)->NEXTKEY(@_) } | |
132 | ||
133 | sub _copy_node { | |
898fd1fd | 134 | my $self = shift; |
f9c33187 | 135 | my ($db_temp) = @_; |
136 | ||
137 | my $key = $self->first_key(); | |
138 | while ($key) { | |
139 | my $value = $self->get($key); | |
140 | $self->_copy_value( \$db_temp->{$key}, $value ); | |
141 | $key = $self->next_key($key); | |
142 | } | |
143 | ||
144 | return 1; | |
145 | } | |
6fe26b29 | 146 | |
147 | 1; | |
148 | __END__ |