Commit | Line | Data |
6fe26b29 |
1 | package DBM::Deep::Hash; |
2 | |
3 | use strict; |
4 | |
5 | use base 'DBM::Deep'; |
6 | |
596e9574 |
7 | sub _get_self { |
a4e2db58 |
8 | eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0] |
596e9574 |
9 | } |
10 | |
6fe26b29 |
11 | sub TIEHASH { |
12 | ## |
13 | # Tied hash constructor method, called by Perl's tie() function. |
14 | ## |
15 | my $class = shift; |
0ca7ea98 |
16 | my $args = $class->_get_args( @_ ); |
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17 | |
18 | $args->{type} = $class->TYPE_HASH; |
19 | |
20 | return $class->_init($args); |
21 | } |
22 | |
cb79ec85 |
23 | sub FETCH { |
24 | my $self = shift->_get_self; |
4d35d856 |
25 | my $key = ($self->_root->{filter_store_key}) |
26 | ? $self->_root->{filter_store_key}->($_[0]) |
cb79ec85 |
27 | : $_[0]; |
28 | |
29 | return $self->SUPER::FETCH( $key ); |
30 | } |
31 | |
81d3d316 |
32 | sub STORE { |
33 | my $self = shift->_get_self; |
4d35d856 |
34 | my $key = ($self->_root->{filter_store_key}) |
35 | ? $self->_root->{filter_store_key}->($_[0]) |
81d3d316 |
36 | : $_[0]; |
37 | my $value = $_[1]; |
38 | |
39 | return $self->SUPER::STORE( $key, $value ); |
40 | } |
41 | |
baa27ab6 |
42 | sub EXISTS { |
43 | my $self = shift->_get_self; |
4d35d856 |
44 | my $key = ($self->_root->{filter_store_key}) |
45 | ? $self->_root->{filter_store_key}->($_[0]) |
baa27ab6 |
46 | : $_[0]; |
47 | |
48 | return $self->SUPER::EXISTS( $key ); |
49 | } |
50 | |
feaf1e6f |
51 | sub DELETE { |
52 | my $self = shift->_get_self; |
4d35d856 |
53 | my $key = ($self->_root->{filter_store_key}) |
54 | ? $self->_root->{filter_store_key}->($_[0]) |
feaf1e6f |
55 | : $_[0]; |
56 | |
57 | return $self->SUPER::DELETE( $key ); |
58 | } |
59 | |
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60 | sub FIRSTKEY { |
61 | ## |
62 | # Locate and return first key (in no particular order) |
63 | ## |
2ac02042 |
64 | my $self = $_[0]->_get_self; |
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65 | |
66 | ## |
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67 | # Request shared lock for reading |
68 | ## |
69 | $self->lock( $self->LOCK_SH ); |
70 | |
6736c116 |
71 | my $result = $self->{engine}->get_next_key($self); |
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72 | |
73 | $self->unlock(); |
74 | |
4d35d856 |
75 | return ($result && $self->_root->{filter_fetch_key}) |
76 | ? $self->_root->{filter_fetch_key}->($result) |
6fe26b29 |
77 | : $result; |
78 | } |
79 | |
80 | sub NEXTKEY { |
81 | ## |
82 | # Return next key (in no particular order), given previous one |
83 | ## |
2ac02042 |
84 | my $self = $_[0]->_get_self; |
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85 | |
4d35d856 |
86 | my $prev_key = ($self->_root->{filter_store_key}) |
87 | ? $self->_root->{filter_store_key}->($_[1]) |
6fe26b29 |
88 | : $_[1]; |
89 | |
612969fb |
90 | my $prev_md5 = $self->{engine}{digest}->($prev_key); |
6fe26b29 |
91 | |
92 | ## |
6fe26b29 |
93 | # Request shared lock for reading |
94 | ## |
95 | $self->lock( $self->LOCK_SH ); |
96 | |
6736c116 |
97 | my $result = $self->{engine}->get_next_key( $self, $prev_md5 ); |
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98 | |
99 | $self->unlock(); |
100 | |
4d35d856 |
101 | return ($result && $self->_root->{filter_fetch_key}) |
102 | ? $self->_root->{filter_fetch_key}->($result) |
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103 | : $result; |
104 | } |
105 | |
106 | ## |
107 | # Public method aliases |
108 | ## |
109 | *first_key = *FIRSTKEY; |
110 | *next_key = *NEXTKEY; |
111 | |
112 | 1; |
113 | __END__ |