goodslib
Class Blob

java.lang.Object
  |
  +--goodsjpi.Persistent
        |
        +--goodslib.Blob

public class Blob

extends Persistent

Binary large object class. This class can be used as base for creating multimedia or text objects with large size and sequential access. This class provide functionality for incremental object loading by parallel task.

Field Summary

protected byte[]	data
protected goodslib.Blob	last
protected goodslib.Blob	next

Fields inherited from class goodsjpi.Persistent

defaultMetaobject, metaobject

Constructor Summary

Blob(byte[] buf)

Blob(int partSize)

Method Summary

void	append(goodslib.Blob bp) Append new blob object at the end of blob objects chain.
protected void	fetched()
boolean	handle() This method is called by 'play' method for each part of blob object within conext of current task.
void	play() Default implementation of this method just extracts all parts of blob from database and calls handle method for each part.

Methods inherited from class goodsjpi.Persistent

attachToStorage, clone, clusterWith, finalize, getDatabase, getOid, getStorageId, hashCode

Methods inherited from class java.lang.Object

equals, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

next

protected goodslib.Blob next

last

protected goodslib.Blob last

data

protected byte[] data

Constructor Detail

Blob

public Blob(int partSize)

Blob

public Blob(byte[] buf)

Method Detail

handle

public boolean handle()

This method is called by 'play' method for each part of blob object within conext of current task. If this method returns False preloading process is terminated.

play

public void play()

Default implementation of this method just extracts all parts of blob from database and calls handle method for each part.

fetched

protected void fetched()

append

public void append(goodslib.Blob bp)

Append new blob object at the end of blob objects chain.