Binding Converters, Listeners, and Validators to Managed Bean Properties (original) (raw)
2. Using the Tutorial Examples
3. Getting Started with Web Applications
4. JavaServer Faces Technology
7. Using JavaServer Faces Technology in Web Pages
8. Using Converters, Listeners, and Validators
9. Developing with JavaServer Faces Technology
10. JavaServer Faces Technology: Advanced Concepts
11. Using Ajax with JavaServer Faces Technology
12. Composite Components: Advanced Topics and Example
13. Creating Custom UI Components and Other Custom Objects
Determining Whether You Need a Custom Component or Renderer
When to Use a Custom Component
Component, Renderer, and Tag Combinations
Understanding the Image Map Example
Why Use JavaServer Faces Technology to Implement an Image Map?
Understanding the Rendered HTML
Understanding the Facelets Page
Summary of the Image Map Application Classes
Steps for Creating a Custom Component
Creating Custom Component Classes
Specifying the Component Family
Enabling Component Properties to Accept Expressions
Delegating Rendering to a Renderer
Implementing an Event Listener
Implementing Value-Change Listeners
Handling Events for Custom Components
Defining the Custom Component Tag in a Tag Library Descriptor
Creating and Using a Custom Converter
Creating and Using a Custom Validator
Implementing the Validator Interface
Binding Component Values and Instances to Managed Bean Properties
Binding a Component Value to a Property
Binding a Component Value to an Implicit Object
Binding a Component Instance to a Bean Property
14. Configuring JavaServer Faces Applications
16. Uploading Files with Java Servlet Technology
17. Internationalizing and Localizing Web Applications
18. Introduction to Web Services
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20. Building RESTful Web Services with JAX-RS
21. JAX-RS: Advanced Topics and Example
23. Getting Started with Enterprise Beans
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25. A Message-Driven Bean Example
26. Using the Embedded Enterprise Bean Container
27. Using Asynchronous Method Invocation in Session Beans
Part V Contexts and Dependency Injection for the Java EE Platform
28. Introduction to Contexts and Dependency Injection for the Java EE Platform
29. Running the Basic Contexts and Dependency Injection Examples
30. Contexts and Dependency Injection for the Java EE Platform: Advanced Topics
31. Running the Advanced Contexts and Dependency Injection Examples
32. Introduction to the Java Persistence API
33. Running the Persistence Examples
34. The Java Persistence Query Language
35. Using the Criteria API to Create Queries
36. Creating and Using String-Based Criteria Queries
37. Controlling Concurrent Access to Entity Data with Locking
38. Using a Second-Level Cache with Java Persistence API Applications
39. Introduction to Security in the Java EE Platform
40. Getting Started Securing Web Applications
41. Getting Started Securing Enterprise Applications
42. Java EE Security: Advanced Topics
Part VIII Java EE Supporting Technologies
43. Introduction to Java EE Supporting Technologies
45. Resources and Resource Adapters
46. The Resource Adapter Example
47. Java Message Service Concepts
48. Java Message Service Examples
49. Bean Validation: Advanced Topics
50. Using Java EE Interceptors
51. Duke's Bookstore Case Study Example
52. Duke's Tutoring Case Study Example
53. Duke's Forest Case Study Example
As described in Adding Components to a Page Using HTML Tags, a page author can bind converter, listener, and validator implementations to managed bean properties using the binding attributes of the tags that are used to register the implementations on components.
This technique has similar advantages to binding component instances to managed bean properties, as described in Binding Component Values and Instances to Managed Bean Properties. In particular, binding a converter, listener, or validator implementation to a managed bean property yields the following benefits:
- The managed bean can instantiate the implementation instead of allowing the page author to do so.
- The managed bean can programmatically modify the attributes of the implementation. In the case of a custom implementation, the only other way to modify the attributes outside of the implementation class would be to create a custom tag for it and require the page author to set the attribute values from the page.
Whether you are binding a converter, listener, or validator to a managed bean property, the process is the same for any of the implementations:
- Nest the converter, listener, or validator tag within an appropriate component tag.
- Make sure that the managed bean has a property that accepts and returns the converter, listener, or validator implementation class that you want to bind to the property.
- Reference the managed bean property using a value expression from the binding attribute of the converter, listener, or validator tag.
For example, say that you want to bind the standard DateTime converter to a managed bean property because you want to set the formatting pattern of the user’s input in the managed bean rather than on the Facelets page. First, the page registers the converter onto the component by nesting the f:convertDateTimetag within the component tag.
Then, the page references the property with the binding attribute of the f:convertDateTimetag:
<h:inputText value="#{loginBean.birthDate}"> <f:convertDateTime binding="#{loginBean.convertDate}" />
The convertDate property would look something like this:
private DateTimeConverter convertDate; public DateTimeConverter getConvertDate() { ... return convertDate; } public void setConvertDate(DateTimeConverter convertDate) { convertDate.setPattern("EEEEEEEE, MMM dd, yyyy"); this.convertDate = convertDate; }
See Writing Properties Bound to Converters, Listeners, or Validators for more information on writing managed bean properties for converter, listener, and validator implementations.
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