jdbm.btree
Class BPage.Browser

java.lang.Object
  jdbm.helper.TupleBrowser
      jdbm.btree.BPage.Browser

Enclosing class:

BPage

static class BPage.Browser

extends TupleBrowser

PRIVATE INNER CLASS Browser to traverse leaf BPages.

Constructor Summary

(package private)

BPage.Browser(BPage page, int index) Create a browser.

Method Summary

boolean	getNext(Tuple tuple) Get the next tuple.
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

BPage.Browser

BPage.Browser(BPage page,
              int index)

Create a browser.

Parameters:

page - Current page

index - Position of the next tuple to return.

Method Detail

getNext

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

Description copied from class: TupleBrowser

Get the next tuple.

Specified by:

getNext in class TupleBrowser

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

Description copied from class: TupleBrowser

Get the previous tuple.

Specified by:

getPrevious in class TupleBrowser

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