oracle.toplink.queryframework
Class Cursor

java.lang.Object
  oracle.toplink.queryframework.Cursor

All Implemented Interfaces:

java.io.Serializable, java.util.Enumeration

Direct Known Subclasses:

CursoredStream, ScrollableCursor

public abstract class Cursor
extends java.lang.Object
implements java.util.Enumeration, java.io.Serializable

Purpose: Abstract class for CursoredStream and ScrolableCursor

See Also:

Serialized Form

Field Summary

CursorPolicy

policy Object-level read query that initialize the stream.

Method Summary

void	close() Closes the stream.
boolean	isClosed() Return if the stream is closed.
int	size() Retreive the size of the open cursor by executing a count on the same query as the cursor.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Enumeration

hasMoreElements, nextElement

Field Detail

policy

public transient CursorPolicy policy

Description copied from class: Cursor

Object-level read query that initialize the stream.

Method Detail

close

public void close()
           throws DatabaseException

Closes the stream. This should be performed whenever the user has finished with the stream.

Throws:

DatabaseException

isClosed

public boolean isClosed()

Return if the stream is closed.

size

public int size()
         throws DatabaseException

Retreive the size of the open cursor by executing a count on the same query as the cursor. If this cursor is conforming size() can only be an estimate. cursor size plus number of conforming instances found in memory will be returned. The union (actual result) may be smaller than this.

Throws:

DatabaseException