Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.helper

Class InvalidObject

java.lang.Object

org.eclipse.persistence.internal.helper.InvalidObject

public class InvalidObject
extends Object

Purpose:Indicates an object that should not be returned from query execution.

When conforming if checkEarly return finds a matching object by exact primary key, but that object is deleted, want to return null from query execution.

However if null is returned from checkEarly return that will indicate that no object was found and to go to the database. Hence returning null is not enough, something else needed to be returned, indicating not only that checkEarlyReturn had failed but query execution should not proceed.

Can be used in other instances where returning null is ambiguous.

Implements singleton pattern

Field Summary

Fields

Modifier and Type	Field	Description
static final InvalidObject	instance

Method Summary

Modifier and Type	Method	Description
static InvalidObject	instance()

Methods inherited from class java.lang.Object

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

Field Details

instance

public static final InvalidObject instance

Method Details

instance

public static InvalidObject instance()

Returns:

singleton invalid object.