NAME
DBIx::DR::Iterator - iterator for DBIx::DR.
SYNOPSIS
my $it = DBIx::DR::Iterator->new($arrayref);
printf "Rows count: %d\n", $it->count;
while(my $row == $it->next) {
print "Row: %s\n", $row->field;
}
my $row = $it->get(15); # element 15
my $it = DBIx::DR::Iterator->new($hashref);
printf "Rows count: %d\n", $it->count;
while(my $row == $it->next) {
print "Row: %s\n", $row->field;
}
my $row = $it->get('abc'); # element with key name eq 'abc'DESCRIPTION
The package constructs iterator from HASHREF or ARRAYREF value.
Methods
new
Constructor.
my $i = DBIx::DR::Iterator->new($arrayset [, OPTIONS ]);Where OPTIONS are:
- -item => 'decamelized_obj_define';
-
It will bless (or construct) row into specified class. See below.
By default it constructs DBIx::DR::Iterator::Item objects.
- -noitem_iter => TRUE|FALSE
-
Don't pass iterator to item constructor.
- -keep_blessed => TRUE|FALSE
-
Force store blessed item into iterator. Default value is
true.
count
Returns count of elements.
is_changed
Returns (or set) flag that one of contained elements was changed.
exists(name|number)
Returns true if element 'name|number' is exists.
get(name|number)
Returns element by 'name|number'. It will throw exception if element isn't exists.
next
Returns next element or undef.
reset
Resets internal iterator (that is used by next).
all
Returns all elements (as an array).
If You notice an argument it will extract specified fields:
my @ids = $it->all('id');The same as:
my @ids = map { $_->id } $it->all;grep
Constructs new iterator that is subset of parent iterator.
my $busy = $list->grep(sub { $_[0]->busy ? 1 : 0 });push
Pushes one element into iterator.
If You use HASH-iterator You have to note key name.
Example
$hiter->push(abc => { id => 1 });
$hiter->push(abc => $oiter->get('abc'));
$aiter->push({ id => 1 });DBIx::DR::Iterator::Item
One row. It has methods names coincident with field names. Also it has a few additional methods:
new
Constructor. Receives two arguments: HASHREF and link to iterator.
my $row = DBIx::DR::Iterator::Item->new({ id => 1 });
$row = DBIx::DR::Iterator::Item->new({ id => 1 }, $iterator); }iterator
Returns (or set) iterator object. The link is created by constructor. This is a weaken link.
is_changed
Returns (or set) flag if the row has been changed. If You change any of row's fields the flag will be set. Also iterator's flag will be set.
COPYRIGHT
Copyright (C) 2011 Dmitry E. Oboukhov <unera@debian.org>
Copyright (C) 2011 Roman V. Nikolaev <rshadow@rambler.ru>
This program is free software, you can redistribute it and/or
modify it under the terms of the Artistic License.