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  (c) 2006, 2007 Anupam Sengupta

  http://rubytree.rubyforge.org

Rubytree is a simple implementation of the generic Tree data structure.  This

implementation is node-centric, where the individual nodes on the tree are the

primary objects and drive the structure.

== INSTALL:

Rubytree is an open source project and is hosted at:

   http://rubytree.rubyforge.org

Rubytree can be downloaded as a Rubygem or as a tar/zip file from:

   http://rubyforge.org/frs/?group_id=1215&release_id=8817

The file-name is one of:

    rubytree-<VERSION>.gem - The Rubygem

    rubytree-<VERSION>.tgz - GZipped source files

    rubytree-<VERSION>.zip - Zipped  source files

Download the appropriate file-type for your system.

It is recommended to install Rubytree as a Ruby Gem, as this is an easy way to

keep the version updated, and keep multiple versions of the library available on

your system.

=== Installing the Gem

To Install the Gem, from a Terminal/CLI command prompt, issue the command:

   gem install rubytree

This should install the gem file for Rubytree. Note that you may need to be a

super-user (root) to successfully install the gem.

=== Installing from the tgz/zip file

Extract the archive file (tgz or zip) and run the following command from the

top-level source directory:

    ruby ./setup.rb

You may need administrator/super-user privileges to complete the setup using

this method.

== DOCUMENTATION:

The primary class for this implementation is Tree::TreeNode. See the

class documentation for an usage example.

From a command line/terminal prompt, you can issue the following command to view

the text mode ri documentation:

    ri Tree::TreeNode

Documentation on the web is available at:

http://rubytree.rubyforge.org/rdoc

== EXAMPLE:

The following code-snippet implements this tree structure:

                 +------------+

                 |    ROOT    |

                 +-----+------+

         +-------------+------------+

         |                          |

 +-------+-------+          +-------+-------+

 |  CHILD 1      |          |  CHILD 2      |

 +-------+-------+          +---------------+

         |

         |

 +-------+-------+

 | GRANDCHILD 1  |

 +---------------+

 require 'tree'

 myTreeRoot = Tree::TreeNode.new("ROOT", "Root Content")

 myTreeRoot << Tree::TreeNode.new("CHILD1", "Child1 Content") << Tree::TreeNode.new("GRANDCHILD1", "GrandChild1 Content")

 myTreeRoot << Tree::TreeNode.new("CHILD2", "Child2 Content")

 myTreeRoot.printTree

 child1 = myTreeRoot["CHILD1"]

 grandChild1 = myTreeRoot["CHILD1"]["GRANDCHILD1"]

 siblingsOfChild1Array = child1.siblings

 immediateChildrenArray = myTreeRoot.children

 # Process all nodes

 myTreeRoot.each { |node| node.content.reverse }

 myTreeRoot.remove!(child1) # Remove the child

== LICENSE:

Rubytree is licensed under BSD license.

Copyright (c) 2006, 2007 Anupam Sengupta

All rights reserved.

Redistribution and use in source and binary forms, with or without modification,

are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this

  list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice, this

  list of conditions and the following disclaimer in the documentation and/or

  other materials provided with the distribution.

- Neither the name of the organization nor the names of its contributors may

  be used to endorse or promote products derived from this software without

  specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR

ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

(Document Revision: $Revision: 1.16 $ by $Author: anupamsg $)