NAME

Tree::Simple::Visitor::BreadthFirstTraversal - A Visitor for breadth-first traversal a Tree::Simple hierarchy

SYNOPSIS

  use Tree::Simple::Visitor::BreadthFirstTraversal;

  # create an visitor
  my $visitor = Tree::Simple::Visitor::BreadthFirstTraversal->new();

  # pass our visitor to the tree
  $tree->accept($visitor);

  # print our results
  print join ", " => $visitor->getResults();

  # this will print this:
  #   1, 2, 3, 1.1, 1.2, 2.1, 3.1, 1.1.1
  # assuming your tree is like this:
  #   1
  #     1.1
  #       1.1.1
  #     1.2
  #   2
  #     2.1
  #   3
  #     3.1

DESCRIPTION

This implements a breadth-first traversal of a Tree::Simple hierarchy. This can be an alternative to the built in depth-first traversal of the Tree::Simple "traverse" method.

METHODS

new: There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize its behavior.
includeTrunk ($boolean): Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well.
setNodeFilter ($filter_function): This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple object.
visit ($tree): This is the method that is used by the Tree::Simple "accept" method. It can also be used on its own, it requires the $tree argument to be a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise.
getResults: This method returns the accumulated results of the application of the node filter to the tree.

Repository

<https://github.com/ronsavage/Tree-Simple-VisitorFactory>

SUPPORT

Bugs should be reported via the CPAN bug tracker at

<https://github.com/ronsavage/Tree-Simple-VisitorFactory/issues>

CODE COVERAGE

See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more information.

AUTHOR

stevan little, <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

<http://www.iinteractive.com>

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