NAME¶
Tree::Simple::Visitor::LoadClassHierarchy - A Visitor for loading class
hierarchies into a Tree::Simple hierarchy
SYNOPSIS¶
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 $class
DESCRIPTION¶
This visitor will traverse a class's inheritance hierarchy (through the @ISA
arrays) and create a Tree::Simple hierarchy which mirrors it.
METHODS¶
- new
- There are no arguments to the constructor the object will be in its
default state. You can use the "setNodeFilter" method to
customize its behavior.
- includeTrunk ($boolean)
- Setting the $boolean value to true (1) will cause the node value of the
$tree object passed into "visit" to be set with the root value
found in the class hierarchy. Setting it to false (0), or not setting it,
will result in the first value in the class hierarchy creating a new node
level.
- includeMethods ($boolean)
- Setting the $boolean value to true (1) will cause methods to be added as a
children of the class node. Setting it to false (0), or not setting it,
will result in this not happening.
NOTE: Methods are sorted ascii-betically before they are added to
the tree. This allows a more predictable hierarchy.
- setClass ($class)
- The argument $class should be either a class name or an instance, it is
then used as the root from which to determine the class hierarchy.
- setNodeFilter ($filter_function)
- This method accepts a CODE reference as its $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 $filter_function is
passed the node value extracted from the hash prior to it being inserted
into the tree being built. The $filter_function is expected to return the
value desired for inclusion into the tree.
- visit ($tree)
- This is the method that is used by Tree::Simple's "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.
The $tree argument which is passed to "visit" 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 $tree argument.
TO DO¶
- Improve the "includeMethods" functionality
- 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.
- Add "includeFullSymbolTable" 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.
BUGS¶
None that I am aware of. Of course, if you find a bug, let me know, and I will
be sure to fix it.
CODE COVERAGE¶
See the
CODE COVERAGE section in Tree::Simple::VisitorFactory for more
information.
SEE ALSO¶
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.
AUTHOR¶
stevan little, <stevan@iinteractive.com>
COPYRIGHT AND LICENSE¶
Copyright 2004, 2005 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.