jdbm.helper
Class TupleBrowser

java.lang.Object
  jdbm.helper.TupleBrowser

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

TupleBrowser()

Method Summary

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