use strict;
sub _get_self {
eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
}
sub TIEHASH {
##
# Tied hash constructor method, called by Perl's tie() function.
##
my $class = shift;
my $args = $class->_get_args( @_ );
$args->{type} = $class->TYPE_HASH;
return $class->_init($args);
}
sub FETCH {
my $self = shift->_get_self;
my $key = ($self->_root->{filter_store_key})
? $self->_root->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::FETCH( $key );
}
sub STORE {
my $self = shift->_get_self;
my $key = ($self->_root->{filter_store_key})
? $self->_root->{filter_store_key}->($_[0])
: $_[0];
my $value = $_[1];
return $self->SUPER::STORE( $key, $value );
}
sub EXISTS {
my $self = shift->_get_self;
my $key = ($self->_root->{filter_store_key})
? $self->_root->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::EXISTS( $key );
}
sub DELETE {
my $self = shift->_get_self;
my $key = ($self->_root->{filter_store_key})
? $self->_root->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::DELETE( $key );
}
sub FIRSTKEY {
##
# Locate and return first key (in no particular order)
##
my $self = $_[0]->_get_self;
##
# Make sure file is open
##
if (!defined($self->_fh)) { $self->_open(); }
##
# Request shared lock for reading
##
$self->lock( $self->LOCK_SH );
my $result = $self->_get_next_key();
$self->unlock();
return ($result && $self->_root->{filter_fetch_key})
? $self->_root->{filter_fetch_key}->($result)
: $result;
}
sub NEXTKEY {
##
# Return next key (in no particular order), given previous one
##
my $self = $_[0]->_get_self;
my $prev_key = ($self->_root->{filter_store_key})
? $self->_root->{filter_store_key}->($_[1])
: $_[1];
my $prev_md5 = $Number::Phone::UK::DBM::Deep::DIGEST_FUNC->($prev_key);
##
# Make sure file is open
##
if (!defined($self->_fh)) { $self->_open(); }
##
# Request shared lock for reading
##
$self->lock( $self->LOCK_SH );
my $result = $self->_get_next_key( $prev_md5 );
$self->unlock();
return ($result && $self->_root->{filter_fetch_key})
? $self->_root->{filter_fetch_key}->($result)
: $result;
}
##
# Public method aliases
##
*first_key = *FIRSTKEY;
*next_key = *NEXTKEY;
1;
__END__