TSIBLEY / App-RecordStream-4.0.9-TRIAL / lib / App / RecordStream / Aggregator / Concatenate.pm 

            

              
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package App::RecordStream::Aggregator::Concatenate;
our $VERSION = "4.0.9";
use strict;
use warnings;
use App::RecordStream::Aggregator::MapReduce::Field;
use App::RecordStream::Aggregator;
use App::RecordStream::DomainLanguage::Registry;
use base 'App::RecordStream::Aggregator::MapReduce::Field';
sub new
{
  my $class = shift;
  my $delim = shift;
  my $field = shift;
  my $this = $class->SUPER::new($field);
  $this->{'delim'} = $delim;
  return $this;
}
sub new_from_valuation
{
  my $class     = shift;
  my $delim     = shift;
  my $valuation = shift;
  my $this = $class->SUPER::new_from_valuation($valuation);
  $this->{'delim'} = $delim;
  return $this;
}
sub map_field
{
  my ($this, $value) = @_;
  return [$value];
}
sub reduce
{
  my ($this, $cookie, $cookie2) = @_;
  return [@$cookie, @$cookie2];
}
sub squish
{
  my ($this, $cookie) = @_;
  return join($this->{'delim'}, @$cookie);
}
sub long_usage
{
  return <<EOF;
Usage: concat,<delimiter>,<field>
   Concatenate values from specified field.
EOF
}
sub short_usage
{
  return "concatenate values from provided field";
}
sub argct
{
  return 2;
}
App::RecordStream::Aggregator->register_implementation('concatenate', __PACKAGE__);
App::RecordStream::Aggregator->register_implementation('concat', __PACKAGE__);
App::RecordStream::DomainLanguage::Registry::register_vfn(__PACKAGE__, 'new_from_valuation', 'concatenate', 'SCALAR', 'VALUATION');
App::RecordStream::DomainLanguage::Registry::register_vfn(__PACKAGE__, 'new_from_valuation', 'concat', 'SCALAR', 'VALUATION');
1;