1 package DBM::Deep::Hash;
8 eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
13 # Tied hash constructor method, called by Perl's tie() function.
16 my $args = $class->_get_args( @_ );
18 $args->{type} = $class->TYPE_HASH;
20 return $class->_init($args);
24 my $self = shift->_get_self;
25 my $key = ($self->_root->{filter_store_key})
26 ? $self->_root->{filter_store_key}->($_[0])
29 return $self->SUPER::FETCH( $key );
33 my $self = shift->_get_self;
34 my $key = ($self->_root->{filter_store_key})
35 ? $self->_root->{filter_store_key}->($_[0])
39 return $self->SUPER::STORE( $key, $value );
43 my $self = shift->_get_self;
44 my $key = ($self->_root->{filter_store_key})
45 ? $self->_root->{filter_store_key}->($_[0])
48 return $self->SUPER::EXISTS( $key );
52 my $self = shift->_get_self;
53 my $key = ($self->_root->{filter_store_key})
54 ? $self->_root->{filter_store_key}->($_[0])
57 return $self->SUPER::DELETE( $key );
62 # Locate and return first key (in no particular order)
64 my $self = $_[0]->_get_self;
67 # Request shared lock for reading
69 $self->lock( $self->LOCK_SH );
71 my $result = $self->_get_next_key();
75 return ($result && $self->_root->{filter_fetch_key})
76 ? $self->_root->{filter_fetch_key}->($result)
82 # Return next key (in no particular order), given previous one
84 my $self = $_[0]->_get_self;
86 my $prev_key = ($self->_root->{filter_store_key})
87 ? $self->_root->{filter_store_key}->($_[1])
90 my $prev_md5 = $DBM::Deep::DIGEST_FUNC->($prev_key);
93 # Request shared lock for reading
95 $self->lock( $self->LOCK_SH );
97 my $result = $self->_get_next_key( $prev_md5 );
101 return ($result && $self->_root->{filter_fetch_key})
102 ? $self->_root->{filter_fetch_key}->($result)
107 # Public method aliases
109 *first_key = *FIRSTKEY;
110 *next_key = *NEXTKEY;