Package org.apache.openjpa.event

Class MethodLifecycleCallbacks

java.lang.Object

org.apache.openjpa.event.MethodLifecycleCallbacks

All Implemented Interfaces:

Externalizable, Serializable, LifecycleCallbacks

Direct Known Subclasses:

BeanLifecycleCallbacks

public class MethodLifecycleCallbacks
extends Object
implements LifecycleCallbacks, Externalizable

Callback adapter that invokes a callback method via reflection.

Author:

Steve Kim

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MethodLifecycleCallbacks(Class cls, String method, boolean arg)	Constructor.
MethodLifecycleCallbacks(Method method, boolean arg)	Constructor.

Method Summary

Modifier and Type	Method	Description
Method	getCallbackMethod()	The callback method.
protected static Method	getMethod(Class cls, String method, Class[] args)	Helper method to return the named method of the given class, throwing the proper exception on error.
boolean	hasCallback(Object obj, int eventType)	Return whether the given instance has a callback for the given event type.
void	makeCallback(Object obj, Object arg, int eventType)	Invoke the callback for the given event type on the given instance.
void	readExternal(ObjectInput in)
boolean	requiresArgument()	Returns if this callback expects another argument
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

Constructor Details

MethodLifecycleCallbacks

public MethodLifecycleCallbacks(Class cls,
 String method,
 boolean arg)

Constructor. Supply callback class and its callback method name.

Parameters:

arg - Whether we expect a further argument such as in AfterDetach

MethodLifecycleCallbacks

public MethodLifecycleCallbacks(Method method,
 boolean arg)

Constructor. Supply callback method.

Method Details

getCallbackMethod

public Method getCallbackMethod()

The callback method.

requiresArgument

public boolean requiresArgument()

Returns if this callback expects another argument

hasCallback

public boolean hasCallback(Object obj,
 int eventType)

Description copied from interface: LifecycleCallbacks

Return whether the given instance has a callback for the given event type.

Specified by:

hasCallback in interface LifecycleCallbacks

makeCallback

public void makeCallback(Object obj,
 Object arg,
 int eventType)
                  throws Exception

Description copied from interface: LifecycleCallbacks

Invoke the callback for the given event type on the given instance.

Specified by:

makeCallback in interface LifecycleCallbacks

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object

getMethod

protected static Method getMethod(Class cls,
 String method,
 Class[] args)

Helper method to return the named method of the given class, throwing the proper exception on error.

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException