simpledb.log
Class BasicLogRecord

java.lang.Object
  simpledb.log.BasicLogRecord

public class BasicLogRecord
extends Object

A class that provides the ability to read the values of a log record. The class has no idea what values are there. Instead, the methods nextInt and nextString read the values sequentially. Thus the client is responsible for knowing how many values are in the log record, and what their types are.

Author:

Edward Sciore

Constructor Summary

BasicLogRecord(Page pg, int pos)
A log record located at the specified position of the specified page.

Method Summary

int	nextInt() Returns the next value of the current log record, assuming it is an integer.
String	nextString() Returns the next value of the current log record, assuming it is a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicLogRecord

public BasicLogRecord(Page pg,
                      int pos)

A log record located at the specified position of the specified page. This constructor is called exclusively by LogIterator.next().

Parameters:

pg - the page containing the log record

pos - the position of the log record

Method Detail

nextInt

public int nextInt()

Returns the next value of the current log record, assuming it is an integer.

Returns:

the next value of the current log record

nextString

public String nextString()

Returns the next value of the current log record, assuming it is a string.

Returns:

the next value of the current log record