net.sf.jzeno.aop
Class OriginalValuesAspect

java.lang.Object
  net.sf.jzeno.aop.AbstractAspect
      net.sf.jzeno.aop.OriginalValuesAspect

All Implemented Interfaces:

Aspect

public class OriginalValuesAspect
extends AbstractAspect

This aspect stores the original values of the returning objects. This allows us to have modification detection on the object that live in the presentation layer, or are passed into a second business operation. We are not capable of detecting this in an abstract fashion on the AbstractEntity because we never know which collections get initialized. Key operations are AbstractEntity.snapshot(), AbstractEntity.isChanged(). An object is considered changed if any of it's persistent parts have been modified. A freshly loaded object also receives a snapshot, to allow change detection inside of business methods. An updated object is also snapshot, to allow change detection compared to the last update in the database.

Field Summary

Fields inherited from class net.sf.jzeno.aop.AbstractAspect

afterException, beforeException, his, nextAspect, primaryException

Constructor Summary

OriginalValuesAspect(Aspect nextAspect)

Method Summary

static void	addLoadedEntity(Entity ae)
void	postProcess(java.lang.reflect.Method method, java.lang.Object[] arguments)
void	preProcess(java.lang.reflect.Method method, java.lang.Object[] arguments)

Methods inherited from class net.sf.jzeno.aop.AbstractAspect

getNextAspect, invoke, process, setNextAspect

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OriginalValuesAspect

public OriginalValuesAspect(Aspect nextAspect)

Parameters:

nextAspect -

target -

Method Detail

preProcess

public void preProcess(java.lang.reflect.Method method,
                       java.lang.Object[] arguments)
                throws java.lang.Exception

Overrides:

preProcess in class AbstractAspect

Throws:

java.lang.Exception

postProcess

public void postProcess(java.lang.reflect.Method method,
                        java.lang.Object[] arguments)
                 throws java.lang.Exception

Overrides:

postProcess in class AbstractAspect

Throws:

java.lang.Exception

See Also:

AbstractAspect.postProcess(Method, Object[])

addLoadedEntity

public static void addLoadedEntity(Entity ae)

Parameters:

ae -