NAME

Catmandu::Importer - Namespace for packages that can import

SYNOPSIS

package Catmandu::Importer::Hello;

use Catmandu::Sane;
use Moo;

with 'Catmandu::Importer';

sub generator {
    my ($self) = @_;
    state $fh = $self->fh;
    my $n = 0;
    return sub {
        $self->log->debug("generating record " . ++$n);
        my $name = $self->readline;
        return defined $name ? { "hello" => $name } : undef;
    };
} 

package main;

use Catmandu;

my $importer = Catmandu->importer('Hello', file => '/tmp/names.txt');
$importer->each(sub {
    my $items = shift;
    .
    .
    .
});

# Or on the command line
$ catmandu convert Hello to YAML < /tmp/names.txt

DESCRIPTION

A Catmandu::Importer is a Perl package that can import data from an external source (a file, the network, ...). Most importers read from an input stream, such as STDIN, a given file, or an URL to fetch data from, so this base class provides helper method for consuming the input stream once.

Every Catmandu::Importer is a Catmandu::Fixable and thus inherits a 'fix' parameter that can be set in the constructor. When given then each item returned by the generator will be automatically Fixed using one or more Catmandu::Fixes. E.g.

my $importer = Catmandu->importer('Hello',fix => ['upcase(hello)']);
$importer->each( sub {
    my $item = shift ; # Every item will be upcased... 
} );

Every Catmandu::Importer is a Catmandu::Iterable and inherits the methods (first, each, to_array...) etc.

CONFIGURATION

file

Read input from a local file given by its path. Alternatively a scalar reference can be passed to read from a string.

fh

Read input from an IO::Handle. If not specified, Catmandu::Util::io is used to create the input stream from the file argument or by using STDIN.

encoding

Binmode of the input stream fh. Set to :utf8 by default.

fix

An ARRAY of one or more fixes or file scripts to be applied to imported items.

METHODS

readline

Read a line from the input stream. Equivalent to $importer->fh->getline.

readall

Read the whole input stream as string.

first, each, rest , ...

See Catmandu::Iterable for all inherited methods.

SEE ALSO

Catmandu::Iterable , Catmandu::Fix , Catmandu::Importer::CSV, Catmandu::Importer::JSON , Catmandu::Importer::YAML