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What's the difference between the @Component and @InjectComponent annotations?
The @Component annotation is used to define the type of component, and its parameter bindings. When using @Component, the template must not define the type, and any parameter bindings are merged in:
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@Component(parameters={ "page=index" })
private PageLink home;
Here the type of component is defined by the field type. The field name is matched against the t:id in the template. The page parameter is set in the Java class, and the informal class parameter is set in the template. If the tag in the template was , or if the template tag included the attribute t:type="pagelink", then you would see an exception.
By contrast, @InjectComponent expects the component to be already defined, and doesn't allow any configuration of it:
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@InjectComponent
private Form login;
Again, we're matching the field name to the component id, and you would get an error if the component is not defined in the template.
refer:
1. http://tapestry.apache.org/injection-faq.html
2. http://tapestry.formos.com/nightly/tapestry5/faq/general.html#component-vs-injectcomponent |
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