Package org.apache.cayenne.util

Class ObjectDetachOperation

java.lang.Object

org.apache.cayenne.util.ObjectDetachOperation

public class ObjectDetachOperation
extends Object

An operation that creates a subgraph of detached objects, using the PrefetchTree to delineate the graph boundaries. Target objects can be described by a different set of descriptors, thus allowing server-to-client conversion to happen in the process.

Since:

1.2

Field Summary

Fields

Modifier and Type	Field	Description
protected Map<ObjectId,Persistent>	seen
protected EntityResolver	targetResolver

Constructor Summary

Constructors

Constructor	Description
ObjectDetachOperation(EntityResolver targetResolver)

Method Summary

Modifier and Type	Method	Description
Object	detach(Object object, ClassDescriptor descriptor, PrefetchTreeNode prefetchTree)	"Detaches" an object from its context by creating an unattached copy.
void	reset()

Methods inherited from class java.lang.Object

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

Field Detail

targetResolver

protected EntityResolver targetResolver

seen

protected Map<ObjectId,Persistent> seen

Constructor Detail

ObjectDetachOperation

public ObjectDetachOperation(EntityResolver targetResolver)

Method Detail

reset

public void reset()

detach

public Object detach(Object object,
                     ClassDescriptor descriptor,
                     PrefetchTreeNode prefetchTree)

"Detaches" an object from its context by creating an unattached copy. The copy is created using target descriptor of this operation that may be different from the object descriptor passed to this method.