jdbm.helper

Class TupleBrowser

java.lang.Object

jdbm.helper.TupleBrowser

Direct Known Subclasses:

BPage.Browser, BTree.EmptyBrowser

public abstract class TupleBrowser
extends java.lang.Object

Browser to traverse a collection of tuples. The browser allows for forward and reverse order traversal.

Version:

$Id: TupleBrowser.java,v 1.2 2001/05/19 14:02:00 boisvert Exp $

Author:

Alex Boisvert

Constructor Summary

Constructors

Constructor and Description
TupleBrowser()

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	getNext(Tuple tuple) Get the next tuple.
abstract boolean	getPrevious(Tuple tuple) Get the previous tuple.

Methods inherited from class java.lang.Object

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

Constructor Detail

TupleBrowser

public TupleBrowser()

Method Detail

getNext

public abstract boolean getNext(Tuple tuple)
                         throws java.io.IOException

Get the next tuple.

Parameters:

tuple - Tuple into which values are copied.

Returns:

True if values have been copied in tuple, or false if there is no next tuple.

Throws:

java.io.IOException

getPrevious

public abstract boolean getPrevious(Tuple tuple)
                             throws java.io.IOException

Get the previous tuple.

Parameters:

tuple - Tuple into which values are copied.

Returns:

True if values have been copied in tuple, or false if there is no previous tuple.

Throws:

java.io.IOException