org.apache.felix.ipojo
Interface FieldInterceptor

All Known Implementing Classes:

ArchitectureHandler, ConfigurationHandler, ControllerHandler, Dependency, DependencyHandler, EventAdminPublisherHandler, EventAdminSubscriberHandler, ExtenderModelHandler, LifecycleCallbackHandler, MBeanHandler, PrimitiveHandler, Property, ProvidedServiceHandler, TemporalDependency, TemporalHandler, WhiteBoardPatternHandler

public interface FieldInterceptor

A field interceptor is notified when a monitored field asks for a value or receives a new value. A class implementing this interface is able to be notified of field accesses, and is able to inject a value to this field. The listener needs to be register on the instance manager.

Author:

Felix Project Team

Method Summary

java.lang.Object	onGet(java.lang.Object pojo, java.lang.String fieldName, java.lang.Object value) This method is called when a GETFIELD operation is detected.
void	onSet(java.lang.Object pojo, java.lang.String fieldName, java.lang.Object value) This method is called when a PUTFIELD operation is detected, e.g.

Method Detail

onSet

void onSet(java.lang.Object pojo,
           java.lang.String fieldName,
           java.lang.Object value)

This method is called when a PUTFIELD operation is detected, e.g. an assignation.

Parameters:

pojo - the pojo object setting the value

fieldName - the field name

value - the value passed to the field

onGet

java.lang.Object onGet(java.lang.Object pojo,
                       java.lang.String fieldName,
                       java.lang.Object value)

This method is called when a GETFIELD operation is detected. This method allows to inject a value to the field.

Parameters:

pojo - the pojo object getting the value

fieldName - the field name

value - the value passed to the field (by the previous call)

Returns:

the managed value of the field