Tapestry5的注解之@Inject

@Inject

Tapestry5中有好多个有用的注解，今天记录些@Inject相关的东西。

Injection is Tapestry's way of making a dependency – such as a resource, asset, component, block or service – available in a page, component, mixin or service class.

Injection是Tapestry中定义从属关系的方式 - 例如，resource, asset, component, block or service - 在page，component，mixin或者服务类中都可以定义。

胡乱翻译的。

1 Block Injection 插入一个块儿。。。

@Inject
private Block foo; //默认id为foo的

或者

@Inject
@Id("bar")
private Block barBlock; //id已经被指定

2 Resource Injection 资源插入

• java.util.Locale – The locale for the component (all components within a page use the same locale).

• org.slf4j.Logger – A Logger instance configured for the component, based on the component's class name. SLF4J is a wrapper around Log4J or other logging toolkits.

• org.apache.tapestry5.ComponentResources – The resources for the component, often used to generate links related to the component.

• org.apache.tapestry5.ioc.Messages – The component message catalog for the component, from which localized messages can be generated.

@Inject
private ComponentResources resources;

3 Asset Injection class或者src什么的

@Inject
@Path("context:images/top_banner.png")
private Asset banner;

4 Service Injection

这个比较普遍。。。

5 Request Injection

这个目前只见过，request.isXHR() ? someZone.getBody() : null;这一种情况。。。