Module org.apache.wicket.spring
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:

  • Constructor Details

    • AnnotProxyFieldValueFactory

      public AnnotProxyFieldValueFactory(ISpringContextLocator contextLocator)
      Parameters:
      contextLocator - spring context locator

    • AnnotProxyFieldValueFactory

      public AnnotProxyFieldValueFactory(ISpringContextLocator contextLocator, boolean wrapInProxies)
      Parameters:
      contextLocator - spring context locator
      wrapInProxies - whether or not wicket should wrap dependencies with specialized proxies that can be safely serialized. in most cases this should be set to true.

  • Method Details

    • getFieldValue

      public Object getFieldValue(Field field, Object fieldOwner)
      Description copied from interface: IFieldValueFactory
      Returns the value the field will be set to
      Specified by:
      getFieldValue in interface IFieldValueFactory
      Parameters:
      field - field being injected
      fieldOwner - instance of object being injected
      Returns:
      new field value

    • getBeanDefinition

      public org.springframework.beans.factory.config.BeanDefinition getBeanDefinition(org.springframework.beans.factory.config.ConfigurableListableBeanFactory beanFactory, String name)

    • supportsField

      public boolean supportsField(Field field)
      Description copied from interface: IFieldValueFactory
      Returns true if the factory can generate a value for the field, false otherwise. If this method returns false, getFieldValue() will not be called on this factory
      Specified by:
      supportsField in interface IFieldValueFactory
      Parameters:
      field - field
      Returns:
      true if the factory can generate a value for the field, false otherwise