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package DBM::Deep::Hash;
use 5.006_000;
use strict;
use warnings;
our $VERSION = q(1.0013);
use base 'DBM::Deep';
sub _get_self {
eval { local $SIG{'__DIE__'}; tied( %{$_[0]} ) } || $_[0]
}
sub _repr { return {} }
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;
DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
my $key = ($self->_storage->{filter_store_key})
? $self->_storage->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::FETCH( $key, $_[0] );
}
sub STORE {
my $self = shift->_get_self;
DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
my $key = ($self->_storage->{filter_store_key})
? $self->_storage->{filter_store_key}->($_[0])
: $_[0];
my $value = $_[1];
return $self->SUPER::STORE( $key, $value, $_[0] );
}
sub EXISTS {
my $self = shift->_get_self;
DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
my $key = ($self->_storage->{filter_store_key})
? $self->_storage->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::EXISTS( $key );
}
sub DELETE {
my $self = shift->_get_self;
DBM::Deep->_throw_error( "Cannot use an undefined hash key." ) unless defined $_[0];
my $key = ($self->_storage->{filter_store_key})
? $self->_storage->{filter_store_key}->($_[0])
: $_[0];
return $self->SUPER::DELETE( $key, $_[0] );
}
sub FIRSTKEY {
##
# Locate and return first key (in no particular order)
##
my $self = shift->_get_self;
##
# Request shared lock for reading
##
$self->lock( $self->LOCK_SH );
my $result = $self->_engine->get_next_key( $self );
$self->unlock();
return ($result && $self->_storage->{filter_fetch_key})
? $self->_storage->{filter_fetch_key}->($result)
: $result;
}
sub NEXTKEY {
##
# Return next key (in no particular order), given previous one
##
my $self = shift->_get_self;
my $prev_key = ($self->_storage->{filter_store_key})
? $self->_storage->{filter_store_key}->($_[0])
: $_[0];
##
# Request shared lock for reading
##
$self->lock( $self->LOCK_SH );
my $result = $self->_engine->get_next_key( $self, $prev_key );
$self->unlock();
return ($result && $self->_storage->{filter_fetch_key})
? $self->_storage->{filter_fetch_key}->($result)
: $result;
}
##
# Public method aliases
##
sub first_key { (shift)->FIRSTKEY(@_) }
sub next_key { (shift)->NEXTKEY(@_) }
sub _copy_node {
my $self = shift;
my ($db_temp) = @_;
my $key = $self->first_key();
while ($key) {
my $value = $self->get($key);
$self->_copy_value( \$db_temp->{$key}, $value );
$key = $self->next_key($key);
}
return 1;
}
1;
__END__
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