1 package DBM::Deep::Hash;
11 eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
14 sub _repr { shift;return { @_ } }
21 local $SIG{'__DIE__'};
22 foreach my $key (keys %$struct) {
23 $self->put($key, $struct->{$key});
26 $self->_throw_error("Cannot import: type mismatch");
34 # Tied hash constructor method, called by Perl's tie() function.
37 my $args = $class->_get_args( @_ );
39 $args->{type} = $class->TYPE_HASH;
41 return $class->_init($args);
45 my $self = shift->_get_self;
46 my $key = ($self->_fileobj->{filter_store_key})
47 ? $self->_fileobj->{filter_store_key}->($_[0])
50 return $self->SUPER::FETCH( $key, $_[0] );
54 my $self = shift->_get_self;
55 my $key = ($self->_fileobj->{filter_store_key})
56 ? $self->_fileobj->{filter_store_key}->($_[0])
60 return $self->SUPER::STORE( $key, $value, $_[0] );
64 my $self = shift->_get_self;
65 my $key = ($self->_fileobj->{filter_store_key})
66 ? $self->_fileobj->{filter_store_key}->($_[0])
69 return $self->SUPER::EXISTS( $key );
73 my $self = shift->_get_self;
74 my $key = ($self->_fileobj->{filter_store_key})
75 ? $self->_fileobj->{filter_store_key}->($_[0])
78 return $self->SUPER::DELETE( $key, $_[0] );
83 # Locate and return first key (in no particular order)
85 my $self = shift->_get_self;
88 # Request shared lock for reading
90 $self->lock( $self->LOCK_SH );
92 my $result = $self->{engine}->get_next_key($self);
96 return ($result && $self->_fileobj->{filter_fetch_key})
97 ? $self->_fileobj->{filter_fetch_key}->($result)
103 # Return next key (in no particular order), given previous one
105 my $self = shift->_get_self;
107 my $prev_key = ($self->_fileobj->{filter_store_key})
108 ? $self->_fileobj->{filter_store_key}->($_[0])
111 my $prev_md5 = $self->{engine}{digest}->($prev_key);
114 # Request shared lock for reading
116 $self->lock( $self->LOCK_SH );
118 my $result = $self->{engine}->get_next_key( $self, $prev_md5 );
122 return ($result && $self->_fileobj->{filter_fetch_key})
123 ? $self->_fileobj->{filter_fetch_key}->($result)
128 # Public method aliases
130 sub first_key { (shift)->FIRSTKEY(@_) }
131 sub next_key { (shift)->NEXTKEY(@_) }
137 my $key = $self->first_key();
139 my $value = $self->get($key);
140 $self->_copy_value( \$db_temp->{$key}, $value );
141 $key = $self->next_key($key);