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 { |
2ac02042 |
8 | eval { 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; |
16 | my $args; |
17 | if (scalar(@_) > 1) { $args = {@_}; } |
18 | #XXX This use of ref() is bad and is a bug |
19 | elsif (ref($_[0])) { $args = $_[0]; } |
20 | else { $args = { file => shift }; } |
21 | |
22 | $args->{type} = $class->TYPE_HASH; |
23 | |
24 | return $class->_init($args); |
25 | } |
26 | |
81d3d316 |
27 | sub STORE { |
28 | my $self = shift->_get_self; |
29 | my $key = ($self->root->{filter_store_key}) |
30 | ? $self->root->{filter_store_key}->($_[0]) |
31 | : $_[0]; |
32 | my $value = $_[1]; |
33 | |
34 | return $self->SUPER::STORE( $key, $value ); |
35 | } |
36 | |
6fe26b29 |
37 | sub FIRSTKEY { |
38 | ## |
39 | # Locate and return first key (in no particular order) |
40 | ## |
2ac02042 |
41 | my $self = $_[0]->_get_self; |
6fe26b29 |
42 | |
43 | ## |
44 | # Make sure file is open |
45 | ## |
46 | if (!defined($self->fh)) { $self->_open(); } |
47 | |
48 | ## |
49 | # Request shared lock for reading |
50 | ## |
51 | $self->lock( $self->LOCK_SH ); |
52 | |
53 | my $result = $self->_get_next_key(); |
54 | |
55 | $self->unlock(); |
56 | |
57 | return ($result && $self->root->{filter_fetch_key}) |
58 | ? $self->root->{filter_fetch_key}->($result) |
59 | : $result; |
60 | } |
61 | |
62 | sub NEXTKEY { |
63 | ## |
64 | # Return next key (in no particular order), given previous one |
65 | ## |
2ac02042 |
66 | my $self = $_[0]->_get_self; |
6fe26b29 |
67 | |
68 | my $prev_key = ($self->root->{filter_store_key}) |
69 | ? $self->root->{filter_store_key}->($_[1]) |
70 | : $_[1]; |
71 | |
72 | my $prev_md5 = $DBM::Deep::DIGEST_FUNC->($prev_key); |
73 | |
74 | ## |
75 | # Make sure file is open |
76 | ## |
77 | if (!defined($self->fh)) { $self->_open(); } |
78 | |
79 | ## |
80 | # Request shared lock for reading |
81 | ## |
82 | $self->lock( $self->LOCK_SH ); |
83 | |
84 | my $result = $self->_get_next_key( $prev_md5 ); |
85 | |
86 | $self->unlock(); |
87 | |
88 | return ($result && $self->root->{filter_fetch_key}) |
89 | ? $self->root->{filter_fetch_key}->($result) |
90 | : $result; |
91 | } |
92 | |
93 | ## |
94 | # Public method aliases |
95 | ## |
96 | *first_key = *FIRSTKEY; |
97 | *next_key = *NEXTKEY; |
98 | |
99 | 1; |
100 | __END__ |