NAME

SYNOPSIS

  use Tree::Simple::Visitor::FindByPath;

  # create a visitor object
  my $visitor = Tree::Simple::Visitor::FindByPath->new();

  # set the search path for our tree
  $visitor->setSearchPath(qw(1 1.2 1.2.2));

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

  # fetch the result, which will
  # be the Tree::Simple object that
  # we have found, or undefined
  my $result = $visitor->getResult() || die "No Tree found";

  # our result's node value should match
  # the last element in our path
  print $result->getNodeValue(); # this should print 1.2.2

DESCRIPTION

METHODS

new

There are no arguments to the constructor the object will be in its default state. You can use the "setSearchPath" and "setNodeFilter" methods 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 search as well.

setSearchPath (@path)

This is the path we will attempt to follow down the tree. We will do a stringified comparison of each element of the path and the current tree's node (or the value returned by the node filter if it is set).

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 Tree::Simple's "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.

getResult

This method will return the tree found at the specified path (set by the "setSearchPath" method) or "undef" if no tree is found.

getResults

This method will return the tree's that make up the path specified in "setSearchPath". In the case of a failed search, this can be used to find the elements which did successfully match along the way.

Repository

SUPPORT

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

CODE COVERAGE

SEE ALSO

AUTHOR

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.