Solved

How to use checkbox in java server faces (jsf) when the database is oracle

Posted on 2009-05-07
8
943 Views
Last Modified: 2013-11-24
Hello,

we got a problem with a form that is programmed with jsf.
We got no idea how to programm checkboxes when the database behind is oracle.
A checkbox is usually of type boolean, but oracle cannot handle this type.
 
Do we have to write some kind of wrapper around each checkbox to convert [x] to number "1" and send this to the database?

Any good code example would be appreciated.

0
Comment
Question by:Rainer Meller
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
8 Comments
 
LVL 48

Expert Comment

by:schwertner
ID: 24324076
Checkbox is Boolean (Boolean doesn't exist in the DB), but behind the checkbox sits code.
And PL/SQL and java both support BOOLEAN type.
E.g. the Boolean could be used to conditionally create on the fly SQL statement.
0
 
LVL 27

Author Comment

by:Rainer Meller
ID: 24324379
ok, will discuss this with the programmer.

I also need some more details why he is not using the oracle jsf api

http://www.oracle.com/technology/products/jdev/htdocs/partners/addins/exchange/jsf/doc/tagdoc/core/imageIndex.html
0
 
LVL 48

Expert Comment

by:schwertner
ID: 24325107
Checkboxes in most cases are used for two things:

1. To check what to show and what to hide in the Forms (no matter which - Oracle forms, HTML, etc.)
2. As hint how to modify SELECT and DMA statements before executing in order to achieve special
    functionalities and to restrict the data set (in the WHERE clause)
0
Learn by Doing. Anytime. Anywhere.

Do you like to learn by doing?
Our labs and exercises give you the chance to do just that: Learn by performing actions on real environments.

Hands-on, scenario-based labs give you experience on real environments provided by us so you don't have to worry about breaking anything.

 
LVL 27

Author Comment

by:Rainer Meller
ID: 24326825
Well in this case we want to allow users to specify entries in a form like:

New record:

User 4711 what do you agree more:

I like the weather [ ]
the weather is awful []

What is your favorite color:

green ( )
blue ( )
yellow ( )

This should results in a dataset in an oracle table:

user_number: 4711
likes_weather_yes: true
likes_weather_not:false
preferred_color: green
 
something like that.

the programmer did use postgreSQL before with jsf - it provides the type boolean so binding is no problem at all.
Oracle is different, the programmer cannot bind the datafield "likes_weather_yes" to the checkbox "I like the weather [ ]"

This is, what the entire problem is all about.


Tolomir
0
 
LVL 48

Accepted Solution

by:
schwertner earned 500 total points
ID: 24328185
The checkbox has trigger ot at least the value could be checked:

IF cb_weather = 'checked' THEN v_weatner := 'good' (or TRUE, or YES)
                                           ELSE v_weather := 'bad'   (or FALSE, or NO);
END;

INSERT INTO our_table (weather,....) VALUES (v_weather, ....);
0
 
LVL 27

Author Comment

by:Rainer Meller
ID: 24328767
interesting approach.  Will discuss it with the programmer tomorrow. Thank you.
0
 
LVL 48

Expert Comment

by:schwertner
ID: 24333778
Glad to help.
0
 
LVL 27

Author Closing Comment

by:Rainer Meller
ID: 31578887
Programmer insisted that a direct database connection without " if / then / else" should be used due to performance issues. Still for me it's a good approach.
0

Featured Post

AWS Certified Solutions Architect - Associate

This course has been developed to provide you with the requisite knowledge to not only pass the AWS CSA certification exam but also gain the hands-on experience required to become a qualified AWS Solutions architect working in a real-world environment.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This post first appeared at Oracleinaction  (http://oracleinaction.com/undo-and-redo-in-oracle/)by Anju Garg (Myself). I  will demonstrate that undo for DML’s is stored both in undo tablespace and online redo logs. Then, we will analyze the reaso…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
This video shows setup options and the basic steps and syntax for duplicating (cloning) a database from one instance to another. Examples are given for duplicating to the same machine and to different machines
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question