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DataFlow-Proc-DPath-1.112100
River stage one • 1 direct dependent • 1 total dependent
++
/ DataFlow::Proc::DPath

NAME

DataFlow::Proc::DPath - A processor that filters parts of data structures

VERSION

version 1.112100

SYNOPSIS

  use DataFlow::Proc::DPath;
  my $proc =
    DataFlow::Proc::DPath->new( search_dpath => '//*[key =~ /potatoes/]' );

  @result = $proc->process($data);   # some complex data structure

  # Or, more commonly

  use DataFlow;

  my $flow = DataFlow->new([
    # ...
        [ DPath => search_dpath => '//*[key =~ /potatoes/]' ],
    # ...
  ]);

  @result = $flow->process($data);

DESCRIPTION

This processor provides a filter for Perl data structures using the Data::DPath module. Items will always be treated as scalars (it is likely they will be references to more complex structures, but nonetheless, scalars) and the result will always be an array, with zero or more elements.

Use the references attribute if you want to receive references to the filtered-down content (perhaps you would like to modify only a part of the data structure).

ATTRIBUTES

search_dpath

The path expression used by the Data::DPath functions.

references

This attribute is a boolean, and it signals whether the result list should have references into the data structure or simple copies. The default is 0 (false).

SUPPORT

Perldoc

You can find documentation for this module with the perldoc command.

  perldoc DataFlow::Proc::DPath

Websites

The following websites have more information about this module, and may be of help to you. As always, in addition to those websites please use your favorite search engine to discover more resources.

Email

You can email the author of this module at RUSSOZ at cpan.org asking for help with any problems you have.

Internet Relay Chat

You can get live help by using IRC ( Internet Relay Chat ). If you don't know what IRC is, please read this excellent guide: http://en.wikipedia.org/wiki/Internet_Relay_Chat. Please be courteous and patient when talking to us, as we might be busy or sleeping! You can join those networks/channels and get help:

  • irc.perl.org

    You can connect to the server at 'irc.perl.org' and join this channel: #sao-paulo.pm then talk to this person for help: russoz.

Bugs / Feature Requests

Please report any bugs or feature requests by email to bug-dataflow-proc-dpath at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=DataFlow-Proc-DPath. You will be automatically notified of any progress on the request by the system.

Source Code

The code is open to the world, and available for you to hack on. Please feel free to browse it and play with it, or whatever. If you want to contribute patches, please send me a diff or prod me to pull from your repository :)

https://github.com/russoz/DataFlow-Proc-DPath

  git clone https://github.com/russoz/DataFlow-Proc-DPath

AUTHOR

Alexei Znamensky <russoz@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Alexei Znamensky.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests through the web interface at http://rt.cpan.org.

DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.