Package org.apache.wicket.spring.injection.annot

Class AnnotProxyFieldValueFactory

java.lang.Object
org.apache.wicket.spring.injection.annot.AnnotProxyFieldValueFactory
All Implemented Interfaces:
IFieldValueFactory
public class AnnotProxyFieldValueFactory extends Object implements IFieldValueFactory
IFieldValueFactory that uses LazyInitProxyFactory to create proxies for Spring dependencies based on the SpringBean annotation applied to a field. This class is usually used by the SpringComponentInjector to inject objects with lazy init proxies. However, this class can be used on its own to create proxies for any field decorated with a SpringBean annotation.

Example: 

 IFieldValueFactory factory = new AnnotProxyFieldValueFactory(contextLocator);
 field = obj.getClass().getDeclaredField("dependency");
 IDependency dependency = (IDependency)factory.getFieldValue(field, obj);
In the example above the dependency object returned is a lazy init proxy that will look up the actual IDependency bean from spring context upon first access to one of the methods.

This class will also cache any produced proxies so that the same proxy is always returned for the same spring dependency. This helps cut down on session size because proxies for the same dependency will not be serialized twice.

Author:
Igor Vaynberg (ivaynberg), Istvan Devai, Tobias Soloschenko
See Also: