| org.apache.tapestry.internal.services.ComponentInstantiatorSource
All known Subclasses: org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl,
| ComponentInstantiatorSource | | public interface ComponentInstantiatorSource extends InvalidationEventHub(Code) | | Creates
org.apache.tapestry.internal.services.Instantiator s for components, based on
component class name. This will involve transforming the component's class before it is loaded.
In addition, a source acts as an event hub for
org.apache.tapestry.internal.events.InvalidationListener s, so that any information derived from
loaded classes can be discarded and rebuilt when classes change.
The strategy used is that when any class (in a controlled package) changes, the entire
class loader is discarded, along with any instances derived from those classes. A new class
loader is created, and then invalidation events are fired to listeners.
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| Method Summary | |
| void | addPackage(String packageName)
Adds a controlled package. | | boolean | exists(String className)
Checks to see if a fully qualfied class name exists. | | Instantiator | findInstantiator(String classname)
Given the name of a component class, provides an instantiator for that component. | | ClassFactory | getClassFactory()
Returns a class factory that can be used to generate additional classes around enhanced
classes, or create subclasses of enhanced classes. |
| addPackage | | void addPackage(String packageName)(Code) | | Adds a controlled package. Only classes within controlled packages are subject to
transformation.
Parameters:
packageName - the package name to add (must not be blank) |
| exists | | boolean exists(String className)(Code) | | Checks to see if a fully qualfied class name exists.
Parameters:
className - name of class to check true if the class exists (there's a ".class" file), false otherwise |
| findInstantiator | | Instantiator findInstantiator(String classname)(Code) | | Given the name of a component class, provides an instantiator for that component.
Instantiators are cached, so repeated calls to this method with the same class name will
return the same instance; however, callers should also be aware that the instantiators may
lose validity after an invalidation (caused by changes to external Java class files).
Parameters:
classname - FQCN to find (and perhaps transform and load) an object which can instantiate an instance of the component |
| getClassFactory | | ClassFactory getClassFactory()(Code) | | Returns a class factory that can be used to generate additional classes around enhanced
classes, or create subclasses of enhanced classes.
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