org.tentackle.persist

Class IgnoreDuplicatesPersistenceVisitor

java.lang.Object

org.tentackle.reflect.ReflectiveVisitor

org.tentackle.persist.PersistenceVisitor

org.tentackle.persist.IgnoreDuplicatesPersistenceVisitor

All Implemented Interfaces:

Serializable

public class IgnoreDuplicatesPersistenceVisitor
extends PersistenceVisitor

A visitor to ignore duplicates within a persistence operation.
Used to avoid duplicate key errors (for example in AbstractPersistentObject.insertPlainWithComponents()), if components are referenced more than once within the same root entity.

Author:

harald

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IgnoreDuplicatesPersistenceVisitor() Creates the visitor.

Method Summary

Modifier and Type	Method and Description
boolean	isPersistenceOperationAllowed(AbstractDbObject<?> object, char modType) Checks whether object has already been persisted.
void	visit(AbstractDbObject<?> object, Character modType) Visits all objects.

Methods inherited from class org.tentackle.reflect.ReflectiveVisitor

findVisitMethod, handleException, isImplementedClass, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

IgnoreDuplicatesPersistenceVisitor

public IgnoreDuplicatesPersistenceVisitor()

Creates the visitor.

Method Detail

visit

public void visit(AbstractDbObject<?> object,
                  Character modType)

Visits all objects.

This is the dispatched method!

Parameters:

object - the object

modType - the modification type (ignored)

isPersistenceOperationAllowed

public boolean isPersistenceOperationAllowed(AbstractDbObject<?> object,
                                             char modType)

Checks whether object has already been persisted.

Overrides:

isPersistenceOperationAllowed in class PersistenceVisitor

Parameters:

object - the persistable object

modType - the modification type (ignored)

Returns:

true if object has not been persisted already