simpledb.file
Class Block

java.lang.Object
  simpledb.file.Block

public class Block
extends java.lang.Object

A reference to a disk block. A Block object consists of a filename and a block number. It does not hold the contents of the block; instead, that is the job of a Page object.

Author:

Edward Sciore

Constructor Summary

Block(java.lang.String filename, int blknum)
Constructs a block reference for the specified filename and block number.

Method Summary

boolean	equals(java.lang.Object obj)
java.lang.String	fileName() Returns the name of the file where the block lives.
int	hashCode()
int	number() Returns the location of the block within the file.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Block

public Block(java.lang.String filename,
             int blknum)

Constructs a block reference for the specified filename and block number.

Parameters:

filename - the name of the file

blknum - the block number

Method Detail

fileName

public java.lang.String fileName()

Returns the name of the file where the block lives.

Returns:

the filename

number

public int number()

Returns the location of the block within the file.

Returns:

the block number

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object