[Cocoon Wiki] Update of "CocoonFormsLibraryProject" by MaxPfingsthorn

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The following page has been changed by MaxPfingsthorn:
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'''Google Summer of Code Proposal'''

by MaxPfingsthorn ([mailto:m.pfingsthorn.at.hippo.nl email]).


'''Synopsis'''

Cocoon Forms is a, if not the most, prominent part of Apache's Cocoon framework. With CForms (short of Cocoon Forms), it is possible to define a form independent from the display and handling of the POST/GET data returned from the client browser. It is also possible to bind the input/output of the form to Java Beans or XML streams. This way it is easy to generate complex and mutable forms with server-side validation which produce XML: The core technology used in Cocoon.
This project focuses on making the form definitions more readable, portable, extensible, maintainable and sharable. A rough sketch of the desired functionality is available at WhiteBoardCocoonForms.
After the completion of this project, form definition blocks (or widgets) will be able to be defined in separate "widget library" files which can be tied in to a specific definition easily. Also, widgets are inheritable so to override properties or add behaviour as needed in the more specific form definitions.

'''Benefits to the Community'''

While CForms is a very widely used feature within the Cocoon Community, it is still heavily under development. Currently, form definitions have to be rewritten many times for very similar cases. Building the briefly described extension will allow CForms to grow even faster and stand out as a formidable feature of Cocoon even more, ultimately advancing Cocoon itself. With already implemented extensions, such as AJAX-based update of rendered forms, CForms is in need of a more handy development interface to reach even more developers.

'''Deliverables'''

Deliverables include:

 1. Complete library implementation as described above
 1. Documentation for developer usage of the new feature on the wiki as well as the new Cocoon Zone ([http://cocoon.zones.apache.org/daisy/cocooninaction/4.html Daisy])

'''Project Details'''

The project will mostly be contained within the Cocoon Forms formmodel class heirachy. After some inspection of the current code and code which already very basically implements parts of this feature (available at [http://svn.apache.org/repos/asf/cocoon/whiteboard/forms/ SVN Whiteboard]), I come to the conclusion that there should be a separate component to store library definitions which are kept in memory (maybe in a LRUMap commonly used for Last-Recently-Used chaches) and provide definition objects of the widgets that are referenced in form definitions. As some kind of inheritance of widgets is required, the general WidgetDefinitionBuilder heirarchy has to be extended to allow for overriding parameters in a given definition of the same kind.

'''Project Schedule'''

The schedule governing the execution of this project would look as follows:

|| June 24th - July 24th || Design and coding (and code documentation) of requirements ||
|| July 24th - August 10th || Testing and evaluation ||
|| August 10th - August 17th || User documenation on the Cocoon Zone ||
|| August 17th - September 1st || Buffer Time ||
 

'''Biography/Motivation'''

My name is Max Pfingsthorn and I am currently enrolled in the University of Amsterdam, The Netherlands. I pursue a Master of Science in Grid Computing (soon to be Artificial Intelligence) with a specialisation in Multimodal and Intelligent Systems. I started programming around 8th grade in high school, which was about 9 years ago. Since then, my knowledge of programming languages was continually broadened, starting at Pascal to C/C++, Java, Python, PHP, and Assembler.
Since about 7 months, I have been working at [http://www.hippo.nl Hippo] where I gained a significant insight into Cocoon and learned to appreciate it a lot. Through my constant exposure to the ASF and its various projects (I am currently working on Slide as well as Lucene, and Excalibur/Avalon of course), I have grown quite fond of the ASF and its great user community. Apart from the experience gained from contributing to such a prestigious ASF project, I would like to get to know the Open Source community better as an active member instead of a passive one. Personally, I have been using Linux and Open Source Software for about 4-5 years, and I cannot wait to be an active part of it.

I am very excited to start contributing!

For more information about me please have a look at my [http://student.science.uva.nl/~mpfingst/cv/CV.Max.Pfingsthorn.pdf CV].

Best regards,
Max Pfingsthorn