Download e-book for kindle: JSF 2.0 Cookbook by Anghel Leonard

By Anghel Leonard

ISBN-10: 1847199526

ISBN-13: 9781847199522

This publication, because the description says is geared toward builders with present Java programming wisdom yet i feel the downloadable examples could make it valuable to a much broader viewers to boot.

I could additionally wish to suggest this ebook to anyone who's attracted to what could be completed server aspect, in a short time and with little past wisdom. JSF 2.0 cookbook explains good how JSF can be utilized in conjunction different applied sciences.

In precis in the event that your into JSF or are looking to get into JSF this can be worth it. in case your curious, do not know what JSF is yet like doing cool stuff on web content whereas including ideas on your expertise repertoire then this is able to be for you in addition.

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How to do it... The idea is to have a placebo object—an object that it is not NULL and which is passed to the converter instead of every NULL object. The converter can identify this object by a fixed property, for example its hash code, and every time it gets this object, it will return a custom message to be rendered. getClass()) { return false; } final Placebo other = (Placebo) obj; return true; } } 19 Using Standard and Custom Converters in JSF Notice that we have arbitrarily chosen a fixed hash code as 0011001100.

A RichFaces custom converter follows the same principles as a JSF custom converter. We can implement the Converter interface or extend an existing converter class. For example, in this case we will implement the Converter interface and we will implement the getAsString and getAsObject methods. color = color; } } How it works... It works exactly like a JSF custom converter. See the How it works… section, in the Creating and using a custom converter recipe. See also The code bundled with this book contains a complete example of this recipe.

A JSF converter is called from two directions. It is called once during the Apply Request Values Phase and once during the Render Response Phase. In Apply Request Values Phase the converter is called through getAsObject method, which is responsible to for converting the user inputs, while in the Render Response the converter is called through the getAsString method, which is responsible to for converting outputs before rendering. There's more... xml descriptor, and converters need not be declared in any XML file.

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JSF 2.0 Cookbook by Anghel Leonard

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