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| MEMBERS: | Passing Parameters In A Data Table Using JSF
Some working knowledge of J2EE or JSF is assumed for this article. Like some of you I've been frustrated with this technology known as JSF or Java Server Faces. There are several different flavors out there that are built on the shoulders of JSF. For instance Oracle's ADF (Application Development Framework). Oracle ADF Faces Components is a set of over a 100 JSF components that let you build a richer user interface for your Java EE applications. Oracle ADF Faces also includes many of the framework features most needed by JSF developers today. That is great, and in many ways it will make life easier to develop in a JSF environment. Some items you will find available in these "add on" packages have a real benefit. For instance, as of the date of this article, I was very surprised that a File Upload is a feature still not implemented in JSF in respect to using natural jsf tags. There are ways to accomplish this task in JSF but they are not native JSF approaches. The process is a "no brainer" in just about every other framework available today, including asp.net. Another simple task (I thought) was having a data table present the results of a query in an editable format. Possibly to update a user record or shopping cart. After working in other technologies it was very efficient to return a result set to a data table object and let that object take care of some of the trivial behaviors and characteristics of the table itself. When I started exploring JSF I was frequently and at every turn becoming more and more frustrated in trying to duplicate some of the most basic of processes similar to managing records through data tables. There are not a whole lot of resources out there yet on JSF although it is growing steadily, and I found that all too often the resources that I was finding on the internet either didn't apply to the more simple tasks or the information was just completely wrong. One example of that was that it was stated in one article I read that you cannot use command buttons inside of a JSF data table. The recommendation was to use JSF hyperlinks instead when trying to perform an action from a data table due to a bug in the framework that prevented command button actions to fire if the button resided inside of a data table. At first I thought "you've got to be kidding me"! Then I remembered that I've been finding a fair amount of "bogus" information in regards to JSF development so I decided to do further research and discovered that information to be less than accurate as well. I simply had to find a way to populate a data table through a result set and get a command button to fire an action and pass all of the data in the data table to the backing bean to update the record. Multiple command buttons would exist as well as hidden fields pertaining to id numbers and so forth. Pretty basic stuff and we've all done it before with relative ease. It turned out that the solution was in fact a simple one. "Binding". You've heard about it and read about it. But this approach was something a little different as far as I could find. Many of the blogs and articles that I read dealt with passing the values as parameters and following the steps to define the parameters in faces.config files etc., then retrieving the parameters in a backing bean. Processing the passed data required another set of procedures to utilize mapping to each of the field parameters passed and then processing could begin. That seemed like a whole heck of a lot to me just to retrieve form data. Then it occurred to me that I should be able to "bind" a text field component on a page to a backing bean. Once it is bound then all I have to do is extract the data. And that's all there is to it. My query returned results and pre-populated a data table including text fields with the values of the query pre-populated in the text fields. Each one of those text fields was bound to a "HtmlInputText" type in my backing bean. It was not a String type like other approaches define. Doing that does require you to map parameters and populate that String variable through your set methods once the form is submitted. What I found is that if I bind my text field to a property of text field type that it solved my problem of passing values from a data table, and I didn't have to define parameter fields anywhere in any xml file. Now that I had that figured that out I needed to figure out how to get the value of that property that I've bound my form field to, well why not getValue()? I personally hadn't seen any examples online or in books for retrieving the value from a form binding it to the type of form element it was and simply use the getValue() to pull out the value of the object. Used like this getParameterFromForm().getValue(). Let me clarify that I am NOT saying that trying this approach isn't documented anywhere, I find it hard to believe that I've had some stroke of genius that no one has had before in the world of java, especially since I'm coming from .NET and ColdFusion. After doing that I no longer had any problems passing form data to my backing bean. I was able to dynamically populate data tables with any number of records including any number of command buttons within that data table and I didn't have to concern myself with remembering to define parameters in any other areas of the application. So put simply you can bind your form fields to properties of the same type in your backing bean, and then extract the value of that object using getValue() if you prefer over utilizing parameter string mapping and similar approaches for processing form data. I found it to be easier and less time consuming which has costs associated to it as well.
The Successful Ingredients That You Need To Apply When Building A Website
So you decided you wanted to build a website and now you are faced with all this information and you do not know where to start. Everybody online is promising the moon and stars and it's almost impossible to tell which ones are genuine and which ones are not. A lot of these sales pitches make it sound like you can build a site go to sleep wake up in the morning to thousands in your bank account. So its time to step back from it all and take stock of your position as this will help clear your mind. What are you prepared to do? What are your strengths and weaknesses? Often times we run off and buy stuff and never think out how we can practically apply it. Remember information is one thing it is the application of information which becomes knowledge and this will provide you with a real experience. A real experience will provide real results. The speed of implementation will bring about these results sooner rather than later. Where to start? Note down your interests and then visit article directories and forums and see how popular your subjects of interest are. From here you will get keywords and then you want see how often those keywords get searched. Keywords are your sites building blocks. If the building blocks are weak the overall structure will be weak. Take your time in the research phase as this lays the foundation. Don't be afraid to deviate from your central idea especially if you find that a particular topic under the main subject seems to generate more searches and interest. In other words be flexible. When it comes to building a site you can use a site builder. Just make sure they can build webpage's that are structurally sound in terms of code and keyword density. Take care of the basics, keep it simple and your odds of success will be vastly increased.
Small Business Web Site Development, Design & Hosting
Anybody who wants to start a business looks for minimum investment & maximum returns, especially small businesses where capital is low. The cheapest mode of marketing your business & letting people know about your products/services is internet. That's the reason why lots & lots of small business enterprises are now looking for internet marketing as a new potential area of business. Of course, to promote your business online, you need to have a powerful website. A website is a virtual portal containing information about your company, products & services. You can either setup an online store & sell products thereon, or you can simply provide your contact information on your website, so that people can contact you for your services. In either case, it is very important that you design an attractive website so that users get drawn to it. Attractive does not mean loads of graphics & colors. But it means a site that has balance of all. A good website has a decent layout, great information & is easily accessible. Too much graphics, flash & other such factors delay the downloading of the site, which can be frustrating to user. It also means it is difficult to promote it through search engines freely. The best solution is to approach a professional company & make your goal clearer to them. For a little investment, you can get a great website ready to market. A properly designed website goes a long way to determine your online business. If you can increase your customer base online, you can then think of creating your brand offline as well. Once people start visiting your website & you offer them services/products online, you can built a base to your business wherein you can expand it offline as well. Lot of companies provide complete package for small business website development, design & hosting. These services also extend to online promotion of your site like search engine optimization services. So, in short, you can hire a company that can manage your entire online business. While choosing a company, you can either be specific about how you want your website designed, developed or hosted; or you can just provide them with your business idea. Of course, you should be prepared to offer your services/products once customers start pouring in. So, if you are planning to start a small business then developing a website is the first step you should take.
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