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JDeveloper allows to easily create tables with the af:table component. The table allows easy access to the selected row or rows. However, if you are interested in which cell of a table has been clicked, ADF needs some tweaking. This blog is about how to tweak an af:table to get exactly this info.

Use Case

You like to know which cell in an af:table a user has clicked, e.g. to get some detailed information about the clicked item or cell in the selected row. The sample I show get the information about the current row, and column of the cell and the value of the cell clicked. The final sample will show the info like

How to do it?

The normal af:table component doesn’t give information about the cell a user has clicked on. The ADF pivot table offers this but is complex to use.

We use JavaScript in form of a clientListener to intercept the click on a cell and a serverListener to call a bean method to get more data on the cell. This article 011. ADF Faces RC – How-to use the Client and Server Listener Component shows how to use clientListener and serverListener in detail.

As we are interested in the selected cell, we add a clientListerer to each af:outputText which shows the column value in the af:table which fires on the click event. The clientListener calls a JavaScript method. In the JavaScript method, we build a payload of the UIComponent which is used to show the column value and the column name of the cell. To get this information we have several possible ways: Read the complete article here.

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Technorati Tags: PaaS,Cloud,Middleware Update,WebLogic, WebLogic Community,Oracle,OPN,Jürgen Kress

Oracle JavaScript Extension Toolkit (JET) empowers developers by providing a free and open source modular client-side toolkit based on modern JavaScript, CSS3, and HTML5 design and development principles.

In the development of JET, Oracle believes that following standards and specifications is extremely important whenever possible, especially in the context of enterprise applications. The W3C Web Component specification is one of these standards, with the potential of enabling a larger vision of building and consuming reusable components across a team of developers and, even, across organizations throughout the industry.

Oracle itself is embracing the W3C Web Component specification to provide a consistent way of interoperating with, and extending, Oracle products from all corners of the company. For example, imagine the power of being able create an Oracle JET Web Component that can be reused across Oracle’s PaaS, SaaS, and Database tools like APEX, without changing your code. In the same way, any other application with its client-side developed by means of JET can benefit from these advantages, too.

In this two week Massive Open Online Course (MOOC) you will learn:

• Understanding the W3C Web Component standard.
• How Oracle JET follows the W3C Web Component standard.
• How to set up JET Web Components.
• The architecture of JET Web Components.
• Working with Attributes, Properties, Events, Methods, Slots.
• Translation/Internationalization of JET Web Components.
• Use Case: CRUD application development with JET Web Components.
• Use Case: Extending the Oracle Visual Builder Cloud.

Attend the training here.

Developer Partner Community

For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center.

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Today I had to fix an issue in one of our ADF applications. For those of you working with ADF (as I do too occasionally) this might be valuable, so I decided to share this. The application is based on an old Oracle Forms applications and I had to implement the following functionality:
FRM-41830 : List of Values contains no entries.
In other words (more ADF like) : If you are about to render a List of Values and that List of Values contains no rows, just show a message instead of showing the List of Values.
In this post I will describe how I was able to implement this although it turned out to be a challenge.
Below are the steps that I took. Note that the Application can be downloaded from GIT.
1) I use a UI pattern where we use readonly table and do edits in a popup. That means that any List of Values will add an additional popup to the UI. Read the complete article here.

Developer Partner Community

For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center.

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I develop sample applications pretty often. I try out some ideas, play with some techniques and share the result of my investigations with my colleagues and blog readers by the means of sample applications. When someone wants to see how the technique was implemented they just look into the source code and that’s enough to get the idea. But if they want to see how it actually works and play with it, they need to find the right version of JDeveloper, start it, run the sample application and, probably, dance a little with a tambourine to get it working. Too complicated and not fun. What would be fun is to have a lightweight Docker container with deployed sample application which everyone can easily run on their Docker environment. In this post I am going to show what I did to create a preconfigured docker-image-template which I will use to create images with deployed sample applications.
Since the key is to have a lightweight container and since my sample ADF applications rarely go beyond essentials functionality I decided to create a Docker container running Tomcat with ADF Essentials on top of that.
So, let’s start: 1. Pull and run Tomcat image from Docker hub. Read the complete article here.

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We have new tool from Oracle which can help to simplify offline logic implementation for JS apps.  In this post I will describe how to use Oracle Offline Persistence Toolkit with Oracle JET. However Offline Persistence is not constrained by JET usage only, this toolkit is available on NPM and can be integrated with other JS solutions.
I should emphasise – offline toolkit primary role is to enable mobile hybrid apps to work offline. In my opinion, toolkit usage doesn’t stop here. It can enable user to continue his work, when internet connection is available, but back-end server goes down. Technically user would remain online in this case, but in practice application will be broken – no response from back-end for REST calls. Offline persistence toolkit could help to solve such cases – user could continue working with local cache, until back-end is down.
If you want to learn how offline toolkit works and how to use its API, go to GitHub page – check readme, add it to your JET app and try to run/test. Hands-on is the best way to learn something new. Read the complete article here.

Developer Partner Community

For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center.

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Technorati Tags: PaaS,Cloud,Middleware Update,WebLogic, WebLogic Community,Oracle,OPN,Jürgen Kress