1 package DBM::Deep::Array;
7 no warnings 'recursion';
9 our $VERSION = q(1.0013);
11 # This is to allow DBM::Deep::Array to handle negative indices on
12 # its own. Otherwise, Perl would intercept the call to negative
13 # indices for us. This was causing bugs for negative index handling.
14 our $NEGATIVE_INDICES = 1;
21 eval { local $SIG{'__DIE__'}; tied( @{$_[0]} ) } || $_[0]
28 my $args = $class->_get_args( @_ );
30 $args->{type} = $class->TYPE_ARRAY;
32 return $class->_init($args);
36 my $self = shift->_get_self;
41 if ( !defined $key ) {
43 DBM::Deep->_throw_error( "Cannot use an undefined array index." );
45 elsif ( $key =~ /^-?\d+$/ ) {
47 $key += $self->FETCHSIZE;
48 unless ( $key >= 0 ) {
54 elsif ( $key ne 'length' ) {
56 DBM::Deep->_throw_error( "Cannot use '$key' as an array index." );
59 my $rv = $self->SUPER::FETCH( $key );
67 my $self = shift->_get_self;
68 my ($key, $value) = @_;
70 $self->lock_exclusive;
74 if ( !defined $key ) {
76 DBM::Deep->_throw_error( "Cannot use an undefined array index." );
78 elsif ( $key =~ /^-?\d+$/ ) {
81 $size = $self->FETCHSIZE;
82 if ( $key + $size < 0 ) {
83 die( "Modification of non-creatable array value attempted, subscript $key" );
88 elsif ( $key ne 'length' ) {
90 DBM::Deep->_throw_error( "Cannot use '$key' as an array index." );
93 my $rv = $self->SUPER::STORE( $key, $value );
95 if ( $idx_is_numeric ) {
96 $size = $self->FETCHSIZE unless defined $size;
97 if ( $key >= $size ) {
98 $self->STORESIZE( $key + 1 );
108 my $self = shift->_get_self;
113 if ( !defined $key ) {
115 DBM::Deep->_throw_error( "Cannot use an undefined array index." );
117 elsif ( $key =~ /^-?\d+$/ ) {
119 $key += $self->FETCHSIZE;
120 unless ( $key >= 0 ) {
126 elsif ( $key ne 'length' ) {
128 DBM::Deep->_throw_error( "Cannot use '$key' as an array index." );
131 my $rv = $self->SUPER::EXISTS( $key );
139 my $self = shift->_get_self;
141 warn "ARRAY::DELETE($self,$key)\n" if DBM::Deep::DEBUG;
143 $self->lock_exclusive;
145 my $size = $self->FETCHSIZE;
146 if ( !defined $key ) {
148 DBM::Deep->_throw_error( "Cannot use an undefined array index." );
150 elsif ( $key =~ /^-?\d+$/ ) {
153 unless ( $key >= 0 ) {
159 elsif ( $key ne 'length' ) {
161 DBM::Deep->_throw_error( "Cannot use '$key' as an array index." );
164 my $rv = $self->SUPER::DELETE( $key );
166 if ($rv && $key == $size - 1) {
167 $self->STORESIZE( $key );
175 # Now that we have a real Reference sector, we should store arrayzize there. However,
176 # arraysize needs to be transactionally-aware, so a simple location to store it isn't
179 my $self = shift->_get_self;
183 my $SAVE_FILTER = $self->_engine->storage->{filter_fetch_value};
184 $self->_engine->storage->{filter_fetch_value} = undef;
186 my $size = $self->FETCH('length') || 0;
188 $self->_engine->storage->{filter_fetch_value} = $SAVE_FILTER;
196 my $self = shift->_get_self;
197 my ($new_length) = @_;
199 $self->lock_exclusive;
201 my $SAVE_FILTER = $self->_engine->storage->{filter_store_value};
202 $self->_engine->storage->{filter_store_value} = undef;
204 my $result = $self->STORE('length', $new_length, 'length');
206 $self->_engine->storage->{filter_store_value} = $SAVE_FILTER;
214 my $self = shift->_get_self;
216 $self->lock_exclusive;
218 my $length = $self->FETCHSIZE();
221 my $content = $self->FETCH( $length - 1 );
222 $self->DELETE( $length - 1 );
235 my $self = shift->_get_self;
237 $self->lock_exclusive;
239 my $length = $self->FETCHSIZE();
241 while (my $content = shift @_) {
242 $self->STORE( $length, $content );
251 # XXX This really needs to be something more direct within the file, not a
252 # fetch and re-store. -RobK, 2007-09-20
255 my ($old_key, $new_key) = @_;
257 return $self->_engine->make_reference( $self, $old_key, $new_key );
261 my $self = shift->_get_self;
262 warn "SHIFT($self)\n" if DBM::Deep::DEBUG;
264 $self->lock_exclusive;
266 my $length = $self->FETCHSIZE();
273 my $content = $self->DELETE( 0 );
275 # Unless the deletion above has cleared the array ...
277 for (my $i = 0; $i < $length - 1; $i++) {
278 $self->_move_value( $i+1, $i );
281 $self->DELETE( $length - 1 );
290 my $self = shift->_get_self;
291 my @new_elements = @_;
293 $self->lock_exclusive;
295 my $length = $self->FETCHSIZE();
296 my $new_size = scalar @new_elements;
299 for (my $i = $length - 1; $i >= 0; $i--) {
300 $self->_move_value( $i, $i+$new_size );
303 $self->STORESIZE( $length + $new_size );
306 for (my $i = 0; $i < $new_size; $i++) {
307 $self->STORE( $i, $new_elements[$i] );
312 return $length + $new_size;
316 my $self = shift->_get_self;
318 $self->lock_exclusive;
320 my $length = $self->FETCHSIZE();
323 # Calculate offset and length of splice
326 $offset = 0 unless defined $offset;
327 if ($offset < 0) { $offset += $length; }
330 if (scalar @_) { $splice_length = shift; }
331 else { $splice_length = $length - $offset; }
332 if ($splice_length < 0) { $splice_length += ($length - $offset); }
335 # Setup array with new elements, and copy out old elements for return
337 my @new_elements = @_;
338 my $new_size = scalar @new_elements;
340 my @old_elements = map {
342 } $offset .. ($offset + $splice_length - 1);
345 # Adjust array length, and shift elements to accomodate new section.
347 if ( $new_size != $splice_length ) {
348 if ($new_size > $splice_length) {
349 for (my $i = $length - 1; $i >= $offset + $splice_length; $i--) {
350 $self->_move_value( $i, $i + ($new_size - $splice_length) );
352 $self->STORESIZE( $length + $new_size - $splice_length );
355 for (my $i = $offset + $splice_length; $i < $length; $i++) {
356 $self->_move_value( $i, $i + ($new_size - $splice_length) );
358 for (my $i = 0; $i < $splice_length - $new_size; $i++) {
359 $self->DELETE( $length - 1 );
366 # Insert new elements into array
368 for (my $i = $offset; $i < $offset + $new_size; $i++) {
369 $self->STORE( $i, shift @new_elements );
375 # Return deleted section, or last element in scalar context.
377 return wantarray ? @old_elements : $old_elements[-1];
380 # We don't need to populate it, yet.
381 # It will be useful, though, when we split out HASH and ARRAY
384 # Perl will call EXTEND() when the array is likely to grow.
385 # We don't care, but include it because it gets called at times.
393 my $length = $self->length();
394 for (my $index = 0; $index < $length; $index++) {
395 $self->_copy_value( \$db_temp->[$index], $self->get($index) );
402 # Public method aliases
404 sub length { (shift)->FETCHSIZE(@_) }
405 sub pop { (shift)->POP(@_) }
406 sub push { (shift)->PUSH(@_) }
407 sub unshift { (shift)->UNSHIFT(@_) }
408 sub splice { (shift)->SPLICE(@_) }
410 # This must be last otherwise we have to qualify all other calls to shift
411 # as calls to CORE::shift
412 sub shift { (CORE::shift)->SHIFT(@_) }