Oracle C++ Call Interface Programmer's Guide

PObject Class
PObject Class
OCCI provides object navigational calls that enable applications to perform any of
the following on objects:
■ Creating, accessing, locking, deleting, copying, and flushing objects
■ Getting references to the objects
This class enables the type definer to specify when a class is capable of having
persistent or transient instances. Instances of classes derived from PObject are
either persistent or transient. A class (called "A") that is persistent-capable inherits
from the PObject class:
class A : PObject { ... }
Some of the methods provided, such as lock() and refresh(), are applicable
only for persistent instances, not for transient instances.
To create a null PObject, use the syntax:
PObject();
The only methods valid on a null PObject are setNull(), isNull, and
operator=().
To create a copy of a PObject, use the syntax:
PObject(const PObject& obj);
Summary of PObject Methods
Table 8–15 PObject Methods
Method Summary
flush() on page 8-127 Flushes a modified persistent object to the database
server.
getConnection() on page 8-127 Return the connection from which the PObject object
was instantiated.
getRef() on page 8-127 Return a reference to a given persistent object.
isLocked() on page 8-128 Test whether the persistent object is locked.
isNull() on page 8-128 Test whether the object is null.
8-126 Oracle C++ Call Interface Programmer’s Guide