1 package DBM::Deep::Hash;
8 eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
11 sub _repr { shift;return { @_ } }
18 local $SIG{'__DIE__'};
19 foreach my $key (keys %$struct) {
20 $self->put($key, $struct->{$key});
23 $self->_throw_error("Cannot import: type mismatch");
31 # Tied hash constructor method, called by Perl's tie() function.
34 my $args = $class->_get_args( @_ );
36 $args->{type} = $class->TYPE_HASH;
38 return $class->_init($args);
42 my $self = shift->_get_self;
43 my $key = ($self->_root->{filter_store_key})
44 ? $self->_root->{filter_store_key}->($_[0])
47 return $self->SUPER::FETCH( $key );
51 my $self = shift->_get_self;
52 my $key = ($self->_root->{filter_store_key})
53 ? $self->_root->{filter_store_key}->($_[0])
57 return $self->SUPER::STORE( $key, $value );
61 my $self = shift->_get_self;
62 my $key = ($self->_root->{filter_store_key})
63 ? $self->_root->{filter_store_key}->($_[0])
66 return $self->SUPER::EXISTS( $key );
70 my $self = shift->_get_self;
71 my $key = ($self->_root->{filter_store_key})
72 ? $self->_root->{filter_store_key}->($_[0])
75 return $self->SUPER::DELETE( $key );
80 # Locate and return first key (in no particular order)
82 my $self = shift->_get_self;
85 # Request shared lock for reading
87 $self->lock( $self->LOCK_SH );
89 my $result = $self->{engine}->get_next_key($self);
93 return ($result && $self->_root->{filter_fetch_key})
94 ? $self->_root->{filter_fetch_key}->($result)
100 # Return next key (in no particular order), given previous one
102 my $self = shift->_get_self;
104 my $prev_key = ($self->_root->{filter_store_key})
105 ? $self->_root->{filter_store_key}->($_[0])
108 my $prev_md5 = $self->{engine}{digest}->($prev_key);
111 # Request shared lock for reading
113 $self->lock( $self->LOCK_SH );
115 my $result = $self->{engine}->get_next_key( $self, $prev_md5 );
119 return ($result && $self->_root->{filter_fetch_key})
120 ? $self->_root->{filter_fetch_key}->($result)
125 # Public method aliases
127 sub first_key { (shift)->FIRSTKEY(@_) }
128 sub next_key { (shift)->NEXTKEY(@_) }
134 my $key = $self->first_key();
136 my $value = $self->get($key);
137 $self->_copy_value( \$db_temp->{$key}, $value );
138 $key = $self->next_key($key);