1 package DBM::Deep::Hash;
6 use warnings FATAL => 'all';
11 eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
14 sub _repr { return {} }
18 # Tied hash constructor method, called by Perl's tie() function.
21 my $args = $class->_get_args( @_ );
23 $args->{type} = $class->TYPE_HASH;
25 return $class->_init($args);
29 my $self = shift->_get_self;
30 DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
31 my $key = ($self->_storage->{filter_store_key})
32 ? $self->_storage->{filter_store_key}->($_[0])
35 return $self->SUPER::FETCH( $key, $_[0] );
39 my $self = shift->_get_self;
40 DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
41 my $key = ($self->_storage->{filter_store_key})
42 ? $self->_storage->{filter_store_key}->($_[0])
46 return $self->SUPER::STORE( $key, $value, $_[0] );
50 my $self = shift->_get_self;
51 DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
52 my $key = ($self->_storage->{filter_store_key})
53 ? $self->_storage->{filter_store_key}->($_[0])
56 return $self->SUPER::EXISTS( $key );
60 my $self = shift->_get_self;
61 DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
62 my $key = ($self->_storage->{filter_store_key})
63 ? $self->_storage->{filter_store_key}->($_[0])
66 return $self->SUPER::DELETE( $key, $_[0] );
71 # Locate and return first key (in no particular order)
73 my $self = shift->_get_self;
77 my $result = $self->_engine->get_next_key( $self );
81 return ($result && $self->_storage->{filter_fetch_key})
82 ? $self->_storage->{filter_fetch_key}->($result)
88 # Return next key (in no particular order), given previous one
90 my $self = shift->_get_self;
92 my $prev_key = ($self->_storage->{filter_store_key})
93 ? $self->_storage->{filter_store_key}->($_[0])
98 my $result = $self->_engine->get_next_key( $self, $prev_key );
102 return ($result && $self->_storage->{filter_fetch_key})
103 ? $self->_storage->{filter_fetch_key}->($result)
108 # Public method aliases
110 sub first_key { (shift)->FIRSTKEY(@_) }
111 sub next_key { (shift)->NEXTKEY(@_) }
117 my $key = $self->first_key();
119 my $value = $self->get($key);
120 $self->_copy_value( \$db_temp->{$key}, $value );
121 $key = $self->next_key($key);