NAME

Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn - Consolidates by moving overlaps to new columns

SYNOPSIS

use Data::Range::Compare::Stream::Iterator::File;
use Data::Range::Compare::Stream;
use Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn;
use Data::Range::Compare::Stream::Iterator::Compare::Asc;

my $compare=new  Data::Range::Compare::Stream::Iterator::Compare::Asc();

foreach my $file (qw(source_a.src source_b.src source_d.src source_c.src source_d.src)) {
  my $src=Data::Range::Compare::Stream::Iterator::File->new(filename=>$file);
  my $con=new Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn($src,$compare);
  $compare->add_consolidator($con);
}

my $format='  | %-12s | %-26s |  %-26s|  %-26s|  %-26s|'."\n";
my $break="  +--------------+----------------------------+----------------------------+----------------------------+----------------------------+\n";
printf "$break$format$break","Intersection","Set A",'Set B','Set C','Set D';

while($compare->has_next) {

  my $result=$compare->get_next;
  next if $result->is_empty;

  my $columns=$result->get_root_results($result);
  my @row=($result->get_common);
  foreach my $id (@{$result->get_root_ids}) {
    if($#{$columns->[$id]}!=-1) {
      push @row, join ', ',map { $_->get_common } @{$columns->[$id]};
    } else {
      push @row,"No Data";
    }
  }

  printf $format,@row;
  print $break;
}

DESCRIPTION

This module extends the consolidation engine for Data::Range::Compare::Stream. Unlike the default consolidation object this class does not merge ranges when they overlap: It creates additional instances of itself and inserts them into the "Compare" object. Each new object refers to the object that created it.

Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn can consolidate ranges sorted in the following order:

Consolidation Asc range_start asc,range_end desc.

OO Methods

• my $processor=new Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn($iterator,$cmp);

  Object constructor has 2 required arguments: $processor and $cmp: An $iterator object must implement Data::Range::Compare::Stream::Iterator::Base. A $cmp object must implement Data::Range::Compare::Stream::Iterator::Compare::Asc.

  Optional Arguments:

  factory_instance =>$obj
    
    # defines the object that implements the $obj->factory($start,$end,$data).
    # new ranges are constructed from the factory interfcae.  If a factory interface
    # is not created an instance of Data::Range::Compare::Stream is assumed.

• while($processor->has_next) { do something }

  Returns true when the there are more ranges to consolidate

• my $range=$processor->get_next;

  if $processor->has_next returns true Returns a instance of Data::Range::Compare::Stream::Iterator::Consolidate::Result.

• $self->on_consolidate($new_range,$overlapping_range,$next_range)

  Called during the consolidation process to copy ranges that overlap with the current range being compared into the next valid column.

• $processor->set_column_id($id);

  Sets the column_id value. This is used by the Compare Layer

• my $id=$processor->get_column_id($id);

  Gets the column_id, returns undef if not set.

• my $cmp=$processor->get_compare

  Returns the Data::Range::Compare::Stream::Iterator::Compare::Asc object passed to the constructor.

• my $result=$processor->get_current_result;

  Returns the last Data::Range::Compare::Stream::Iterator::Consolidate::Result object from the $processor->has_next call.

• my $count=$processor->buffer_count;

  Returns the current buffer count.

• if($processor->iterator_has_next) { ... }

  Returns the internal iterator has_next state

• $self->push_to_buffer;

  Internal function. Pushes results onto the buffer.

• my $class=$processor->NEW_ARRAY_ITERATOR_FROM;

  Defines the class that will be used to create iterator objects: $class must implement Data::Range::Compare::Stream::Iterator::Base.

• my $class=$processor->NEW_CHILD_CONSOLIDATOR_FROM;

  Defines the class that will be used to create consolidator objects that will be pushed into the compare object at runtime. $class must implement Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn .

• my $id=$processor->get_root_column_id;

  Gets the parent object's column_id, returns undef if not set.

• if($processor->is_child) { ... }

  Returns true if this object is a child of another Consolidator object.

SEE ALSO

Data::Range::Compare::Stream::Iterator::Consolidate::OverlapAsColumn::Result

Data::Range::Compare::Stream::Iterator::Base

Data::Range::Compare::Stream::Cookbook

AUTHOR

Michael Shipper

Source-Forge Project

As of version 0.001 the Project has been moved to Source-Forge.net

Data Range Compare https://sourceforge.net/projects/data-range-comp/

COPYRIGHT

Copyright 2011 Michael Shipper. All rights reserved.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.