Data::Range::Compare::Stream::Iterator::Compare::LayerCake - Compare Result Filtering layer
use Data::Range::Compare::Stream; use Data::Range::Compare::Stream::Iterator::Array; use Data::Range::Compare::Stream::Iterator::Consolidate; use Data::Range::Compare::Stream::Iterator::Compare::LayerCake; my $iterator_a=Data::Range::Compare::Stream::Iterator::Array->new( new_from=>'Data::Range::Compare::Stream', ); # create a new range and add it to the iterator $iterator_a->create_range(0,0); my $iterator_b=Data::Range::Compare::Stream::Iterator::Array->new( new_from=>'Data::Range::Compare::Stream', ); # create a new range and add it to the iterator $iterator_b->create_range(1,2); $iterator_a->prepare_for_consolidate_asc; $iterator_b->prepare_for_consolidate_asc; my $consolidate_a=Data::Range::Compare::Stream::Iterator::Consolidate->new($iterator_a); my $consolidate_b=Data::Range::Compare::Stream::Iterator::Consolidate->new($iterator_b); my $compare=new Data::Range::Compare::Stream::Iterator::Compare::LayerCake; $compare->add_consolidator($consolidate_a); $compare->add_consolidator($consolidate_b); while($compare->has_next) { # Result objects are instances of: Data::Range::Compare::Stream::Iterator::Compare::Result my $result=$compare->get_next; }
This module extends Data::Range::Compare::Stream::Iterator::Compare::Asc.
Data::Range::Compare::Stream::Iterator::Compare::LayerCake compares results from Data::Range::Compare::Stream::Iterator::Consolidate in the following order: Consolidation Asc range_start asc,range_end desc
my $compare=new Data::Range::Compare::Stream::Iterator::Compare::LayerCake;
my $compare=new Data::Range::Compare::Stream::Iterator::Compare::LayerCake(key=>value);
The constructor takes all the same arguments Data::Range::Compare::Stream::Iterator::Compare::Asc does along with the following optional arguments:
factory_instance =>$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. ignore_empty=>0|1 # default 0 # when set to true all empty result sets are returned ignore_full=>0|1 # default 0 # when set to true all full result sets are returned filter=>undef|code_ref # Default: undef # When Defined: code_ref is used to filter results, code_ref->($result); # if the code_ref returns false the result is ignored # if the code_ref returns true the result will be used as the next valid result
$compare->add_consolidator($iterator);
An $iterator object must implement one of the following iterator classes: Data::Range::Compare::Stream::Iterator::Consolidate, Data::Range::Compare::Stream::Iterator::Compare::Asc. Result objects from $iterator->has_next must implement one of the following result objects: Data::Range::Compare::Stream::Iterator::Consolidate::Result, Data::Range::Compare::Stream::Iterator::Compare::Result.
while($compare->has_next) { do something }
Returns true when the there are more ranges to consolidate.
my $result=$compare->get_next;
if $compare->has_next returns true Returns a instance of Data::Range::Compare::Stream::Iterator::Compare::Result.
my $count=$compare->get_column_count_human_readable;
Returns a human readable count of the columns in the comparison object.
my $count=$compare->get_column_count;
Returns the last index id of the iterator column counts.
my $range=$compare->get_current_row;
Returns the range object that will be used in the $compare->get_next call
my $boolean=$compare->iterators_empty;
Returns false when all iterator objects in $compare are depleted
If $compare->has_next returns true Returns an instance of Data::Range::Compare::Stream::Iterator::Compare::Result.
Data::Range::Compare::Stream::Iterator::Compare::Result
Data::Range::Compare::Stream::Iterator::Consolidate::Result
Data::Range::Compare::Stream::Iterator::Consolidate
Data::Range::Compare::Stream::Cookbook
Michael Shipper
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 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.
To install Data::Range::Compare::Stream, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Data::Range::Compare::Stream
CPAN shell
perl -MCPAN -e shell install Data::Range::Compare::Stream
For more information on module installation, please visit the detailed CPAN module installation guide.