Tree::Simple::Visitor::LoadClassHierarchy - A Visitor for loading class hierarchies into a Tree::Simple hierarchy

  use Tree::Simple::Visitor::LoadClassHierarchy;

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

  # set class as an instance, or
  $visitor->setClass($class);

  # as a package name
  $visitor->setClass("My::Class");

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

  # the $tree now mirrors the inheritance hierarchy of the $class

This visitor will traverse a class's inheritance hierarchy (through the CW@ISA arrays) and create a Tree::Simple hierarchy which mirrors it.

new

There are no arguments to the constructor the object will be in its default state. You can use the CWsetNodeFilter method to customize its behavior.

includeTrunk ($boolean)

Setting the CW$boolean value to true (CW1) will cause the node value of the CW$tree object passed into CWvisit to be set with the root value found in the class heirarchy. Setting it to false (CW0), or not setting it, will result in the first value in the class heirarchy creating a new node level.

includeMethods ($boolean)

Setting the CW$boolean value to true (CW1) will cause methods to be added as a children of the class node. Setting it to false (CW0), or not setting it, will result in this not happening. NOTE: Methods are sorted ascii-betically before they are added to the tree. This allows a more predictable heirarchy.

setClass ($class)

The argument CW$class should be either a class name or an instance, it is then used as the root from which to determine the class hierarchy.

setNodeFilter ($filter_function)

This method accepts a CODE reference as its CW$filter_function argument and throws an exception if it is not a code reference. This code reference is used to filter the tree nodes as they are created, the CW$filter_function is passed the node value extracted from the hash prior to it being inserted into the tree being built. The CW$filter_function is expected to return the value desired for inclusion into the tree.

visit ($tree)

This is the method that is used by Tree::Simple's CWaccept method. It can also be used on its own, it requires the CW$tree argument to be a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise. The CW$tree argument which is passed to CWvisit must be a leaf node. This is because this Visitor will create all the sub-nodes for this tree. If the tree is not a leaf, an exception is thrown. We do not require the tree to be a root though, and this Visitor will not affect any nodes above the CW$tree argument.

I am not sure the tree this creates is the optimal tree for this situation. It is sufficient for now, until I have more of an actual need for this functionality. This would traverse the full symbol tables and produce a detailed tree of everything it finds. This takes a lot more work, and as I have no current need for it, it remains in the TO DO list.

None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.

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

These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that module for more information.

stevan little, <stevan@iinteractive.com>

Copyright 2004 by Infinity Interactive, Inc.

<http://www.iinteractive.com>

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