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Java Source Code / Java Documentation » Library » Tapestry » org.apache.tapestry.ioc 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.tapestry.ioc.ObjectLocator

All known Subclasses:   org.apache.tapestry.ioc.internal.ObjectLocatorImpl,
ObjectLocator
public interface ObjectLocator (Code)
Defines an object which can provide access to services defined within a org.apache.tapestry.ioc.Registry , or to objects or object instances available by other means. Services are accessed via service id, or (when appropriate) by just service interface. The Registry itself implements this interface, as does org.apache.tapestry.ioc.ServiceResources .




Method Summary
 Tautobuild(Class<T> clazz)
     Autobuilds a class by finding the public constructor with the most parameters.
 TgetObject(Class<T> objectType, AnnotationProvider annotationProvider)
     Obtains an object indirectly, using an ObjectProvider identified by the prefix of the reference.
 TgetService(String serviceId, Class<T> serviceInterface)
     Obtains a service via its unique service id.
 TgetService(Class<T> serviceInterface)
     Locates a service given just a service interface.



Method Detail
autobuild
T autobuild(Class<T> clazz)(Code)
Autobuilds a class by finding the public constructor with the most parameters. Services and resources will be injected into the parameters of the constructor. <
Parameters:
  T - >
Parameters:
  clazz - the type of object to instantiate the instantiated instance
throws:
  RuntimeException - if the autobuild fails



getObject
T getObject(Class<T> objectType, AnnotationProvider annotationProvider)(Code)
Obtains an object indirectly, using an ObjectProvider identified by the prefix of the reference.
Parameters:
  objectType - the type of object to be returned
Parameters:
  annotationProvider - provides access to annotations on the field or parameter for which a value is tobe obtained, which may be utilized in selecting an appropriate object, usenull when annotations are not available (in which case,selection will be based only on the object type)<
Parameters:
  T - > the requested object
See Also:   ObjectProvider



getService
T getService(String serviceId, Class<T> serviceInterface)(Code)
Obtains a service via its unique service id. Returns the service's proxy. The service proxy implements the same interface as the actual service, and is used to instantiate the actual service only as needed (this is transparent to the application). <
Parameters:
  T - >
Parameters:
  serviceId - unique ervice id used to locate the service object (may contain symbols,which will be expanded), case is ignored
Parameters:
  serviceInterface - the interface implemented by the service (or an interface extended by the serviceinterface) the service instance
throws:
  RuntimeException - if the service is not defined, or if an error occurs instantiating it



getService
T getService(Class<T> serviceInterface)(Code)
Locates a service given just a service interface. A single service must implement the service interface (which can be hard to guarantee). The search takes into account inheritance of the service interface (not the service implementation), which may result in a failure due to extra matches. <
Parameters:
  T - >
Parameters:
  serviceInterface - the interface the service implements the service's proxy
throws:
  RuntimeException - if the service does not exist (this is considered programmer error), or multipleservices directly implement, or extend from, the service interface



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