org.teiid.internal.core.index
Class Block

java.lang.Object
  org.teiid.internal.core.index.Block

Direct Known Subclasses:

FileListBlock, IndexBlock

public abstract class Block
extends java.lang.Object

A block is a container that can hold information (a list of file names, a list of words, ...), be saved on the disk and loaded in memory.

Field Summary

protected int	blockSize Size of the block
protected Field	field Field in which the information is stored

Constructor Summary

Block(int blockSize)

Method Summary

void	clear() Empties the block.
void	flush() Flushes the block
void	read(java.io.RandomAccessFile raf, int blockNum) Loads the block with the given number in memory, reading it from a RandomAccessFile.
void	write(java.io.RandomAccessFile raf, int blockNum) Writes the block in a RandomAccessFile, giving it a block number.

Methods inherited from class java.lang.Object

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

Field Detail

blockSize

protected int blockSize

Size of the block

field

protected Field field

Field in which the information is stored

Constructor Detail

Block

public Block(int blockSize)

Method Detail

clear

public void clear()

Empties the block.

flush

public void flush()

Flushes the block

read

public void read(java.io.RandomAccessFile raf,
                 int blockNum)
          throws java.io.IOException

Loads the block with the given number in memory, reading it from a RandomAccessFile.

Throws:

java.io.IOException

write

public void write(java.io.RandomAccessFile raf,
                  int blockNum)
           throws java.io.IOException

Writes the block in a RandomAccessFile, giving it a block number.

Throws:

java.io.IOException