barcode vb.net source code Java EE 5 Annotations in Java

Creation QR in Java Java EE 5 Annotations

Java EE 5 Annotations
QR Drawer In Java
Using Barcode creation for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
Reading QR Code 2d Barcode In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
The JSF Expression Language
Barcode Generator In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Decoding Bar Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
In the preceding examples (and in earlier chapters), you saw how to access managed bean properties and invoke managed bean custom (action) methods using special expressions with delimiters #{ and } These expressions follow syntactic rules defined by the Expression Language Specification Let s now take a closer look at the expression language in JavaServer Faces One thing to understand at the outset is that there are differences between the expression language for JSF 11 and the expression language for JSF 12 In the following discussion, the key differences between the expression language for JSF 11 and that for JSF 12 are described
Printing Quick Response Code In C#.NET
Using Barcode drawer for .NET framework Control to generate, create QR Code image in VS .NET applications.
QR Generation In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Important Expression Languages Changes Between JSF 11 and JSF 12
Painting QR Code In VS .NET
Using Barcode maker for VS .NET Control to generate, create Quick Response Code image in VS .NET applications.
Making Denso QR Bar Code In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create QR image in .NET framework applications.
The most fundamental difference between JavaServer Faces versions 11 and 12 is the introduction of the Unified EL Specification With JSF 11, a JSF-specific implementation of EL was created, and although very similar to other EL implementations, such as those used by JSP 20 and the JSP Standard Tag Library (JSTL), it still had significant differences Because expression languages had become an increasingly popular and well-utilized technology across the Java Web tier, it was decided to generalize the EL concepts introduced specifically by JSF so that they could be used by a wider set of Java Web-tier technologies This resulted in the creation of the Unified EL
Make GS1 DataBar Expanded In Java
Using Barcode maker for Java Control to generate, create GS1 DataBar Limited image in Java applications.
Code 128B Maker In Java
Using Barcode generator for Java Control to generate, create Code 128C image in Java applications.
5:
Print UPC-A In Java
Using Barcode generator for Java Control to generate, create UPCA image in Java applications.
Code 128A Creator In Java
Using Barcode encoder for Java Control to generate, create Code 128 Code Set B image in Java applications.
Managed Beans and the JSF Expression Language
British Royal Mail 4-State Customer Code Maker In Java
Using Barcode printer for Java Control to generate, create Royal Mail Barcode image in Java applications.
Bar Code Drawer In None
Using Barcode generator for Online Control to generate, create barcode image in Online applications.
E XPERT GROUP I NSIGHT The Unified EL is now provided by the JSP 21 specification, though it
UPC-A Supplement 2 Creation In Objective-C
Using Barcode generator for iPhone Control to generate, create UPC Symbol image in iPhone applications.
Data Matrix Decoder In VB.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET framework applications.
is specified in a separate subdocument in that specification This was done to facilitate eventually separating the Unified EL out into its own JCP specification for use by the entire Java platform Also, separating the EL from the specific technology hosting it, such as the Java Web tier, means that several important concepts that were formerly in the domain of the EL, such as the notion of scope, are now outside of the EL proper and reside only in JSP or JSF Even so, the rest of this discussion will treat these concepts as if they were a part of the core EL
Barcode Generation In VB.NET
Using Barcode creator for .NET Control to generate, create barcode image in .NET applications.
Bar Code Reader In VS .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
PARTIII PART PART
Code 128C Decoder In C#.NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
ANSI/AIM Code 39 Encoder In Objective-C
Using Barcode maker for iPad Control to generate, create Code 39 Full ASCII image in iPad applications.
JSF 11 developers needn t worry about having to change the syntax of their expressions to upgrade to 12, because the Unified EL accepts syntax compatible with JSF 11 For example, the following still holds true: JSF 12 expressions still use delimiters #{ and } Expressions starting with #{ are still evaluated at runtime, which is referred to as deferred evaluation Expressions starting with ${ are still evaluated at page compile time, in what is referred to as immediate evaluation
JSF 12 TIP The JSF 11 expression language is upwardly compatible with JSF 12 Examining the Evolution of the EL: Deferred vs Immediate Expressions
The EL used in JSF 10 and 11 is an extension of the EL first used in the JSP Standard Tag Library (JSTL), and later in JSP versions 12 and 20 The main extension brought to the EL by JSF that is not present in previous versions is the concept of deferred expressions In JSP, any ${} expression that appears in the page is evaluated immediately as the page is rendered If an expression appears as the value of a JSP tag attribute, such as
<c:set var="name" value="Falstaff" scope="page" /> <demo:customTag value='${pageScopename}' />
then the JavaBeans property named value in the CustomTagjava tag handler class must have a type that matches the type to which the expression evaluates Furthermore, the expression ${pageScopename} is evaluated immediately when the demo:customTag tag is encountered and the setValue( ) method of the CustomTagjava tag handler receives the evaluated value Immediate evaluation is perfectly adequate for JSP, but JSF needed something more JSF introduced the request processing lifecycle (described in 3), which governs what happens when the form is submitted (postback) During a postback, the JSP page that rendered the markup that is being posted back is not known and not available to the JSF runtime; therefore, any expressions in that page are not available, since they were evaluated immediately when the page was rendered JSF introduced the deferred expression concept to allow expressions to be useful both during the rendering of the page, and during a postback This concept allows a deferred expression, such as #{username}, to show a value to the user, and also to be the target of a value entered by the user As described earlier, JSF reserves the #{} delimiter to mean deferred expression and allows JSP to claim ${} to mean immediate expression The #{} delimiter was chosen because it prevents the JSP runtime from evaluating the
Part I:
Copyright © OnBarcode.com . All rights reserved.