跳至主要内容

JSF 2.3: More CDI alignments

More CDI alignments

JSF 2.2 starts CDI integration, provides built-in CDI compatible ViewScoped and @FlowScoped, and all CDI scopes are compatible with JSF.
In JSF 2.3, more CDI alignments are added.
A lots of JSF built-in facilites are exposed as CDI beans, and can be injected as general CDI beans.
In JSF 2.2, to get JSF facilites.
FacesContext context= FacesContext.getCurrentInstance();
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
Map<String, Object> cookieMap = FacesContext.getCurrentInstance().getExternalContext().getRequestCookieMap();
Map<String, Object> viewMap = FacesContext.getCurrentInstance().getViewRoot().getViewMap();
In JSF 2.3, you can inject them directly in your backing bean.
@Inject
FacesContext facesContext;

@Inject
ExternalContext externalContext;

@Inject
@RequestCookieMap
Map<String, Object> cookieMap;

@Inject
@ViewMap
Map<String, Object> viewMap;
And all of these can be resolved via EL in facelets template.
There is a table listed all supported facilites in Arjan Tijms's blog entry, What's new in JSF 2.3? .
Artifact EL name Qualifier Type
Application #{application} - java.lang.Object (javax.servlet.ServletContext)
ApplicationMap #{applicationScope} @ApplicationMap java.util.Map<String, Object>
CompositeComponent #{cc} (Not injectable) javax.faces.component.UIComponent
Component #{component} (Not injectable) javax.faces.component.UIComponent
RequestCookieMap #{cookie} @RequestCookieMap java.util.Map<String, Object>
FacesContext #{facesContext} - javax.faces.context.FacesContext
Flash #{flash} - javax.faces.context.Flash
FlowMap #{flowScope} @FlowMap java.util.Map<Object, Object>
HeaderMap #{header} @HeaderMap java.util.Map<String, String>
HeaderValuesMap #{headerValues} @HeaderValuesMap java.util.Map<String, String[]>
InitParameterMap #{initParam} @InitParameterMap java.util.Map<String, String>
RequestParameterMap #{param} @RequestParameterMap java.util.Map<String, String>
RequestParameterValuesMap #{paramValues} @RequestParameterValuesMap java.util.Map<String, String[]>
Request #{request} (Not injectable) java.lang.Object (javax.servlet.http.HttpServletRequest)
RequestMap #{requestScope} @RequestMap java.util.Map<String, Object>
ResourceHandler #{"resource"} - javax.faces.application.ResourceHandler
Session #{session} (Not injectable) java.lang.Object (javax.servlet.http.HttpSession)
SessionMap #{sessionScope} @SessionMap java.util.Map<String, Object>
View #{view} - javax.faces.component.UIViewRoot
ViewMap #{viewScope} @ViewMap java.util.Map<String, Object>
ExternalContext #{externalContext} (new) - javax.faces.context.ExternalContext

评论

此博客中的热门博文

AngularJS CakePHP Sample codes

Introduction This sample is a Blog application which has the same features with the official CakePHP Blog tutorial, the difference is AngularJS was used as frontend solution, and CakePHP was only use for building backend RESR API. Technologies AngularJS   is a popular JS framework in these days, brought by Google. In this example application, AngularJS and Bootstrap are used to implement the frontend pages. CakePHP   is one of the most popular PHP frameworks in the world. CakePHP is used as the backend REST API producer. MySQL   is used as the database in this sample application. A PHP runtime environment is also required, I was using   WAMP   under Windows system. Post links I assume you have some experience of PHP and CakePHP before, and know well about Apache server. Else you could read the official PHP introduction( php.net ) and browse the official CakePHP Blog tutorial to have basic knowledge about CakePHP. In these posts, I tried to follow the steps describ

Replace ng-annotate with babel-plugin-angularjs-annotate

Replace ng-annotate with babel-plugin-angularjs-annotate ng-annotate was deprecated, the successor is babel-plugin-angularjs-annotate . More details, please read this post . babel-plugin-angularjs-annotate is a standard Babel plugin. Install babel-plugin-angularjs-annotate . npm install babel-plugin-angularjs-annotate --save-dev It is easy to configure it in the babel configuration file, there is a .babelrc file located in the project root folder. { "plugins": ["transform-runtime", ["angularjs-annotate", { "explicitOnly" : true}]], "presets": ["es2015", "stage-0"] } The explicitOnly option force you to use ngInject or /*@ngInject*/ to handle the dependency injection. I have used ngInject in all of the smaple codes to process dependency injection explicitly, there is no need to change the codes. In the former codes, I configured a webpack loader named ng-annotate-loader to process ngInjec

JPA 2.1: Attribute Converter

JPA 2.1: Attribute Converter If you are using Hibernate, and want a customized type is supported in your Entity class, you could have to write a custom Hibernate Type. JPA 2.1 brings a new feature named attribute converter, which can help you convert your custom class type to JPA supported type. Create an Entity Reuse the   Post   entity class as example. @Entity @Table(name="POSTS") public class Post implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name="ID") private Long id; @Column(name="TITLE") private String title; @Column(name="BODY") private String body; @Temporal(javax.persistence.TemporalType.DATE) @Column(name="CREATED") private Date created; @Column(name="TAGS") private List<String> tags=new ArrayList<>(); } Create an attribute convert