org.objectweb.cjdbc.common.stream
Class CJDBCStream

java.lang.Object
  org.objectweb.cjdbc.common.stream.CJDBCStream

public class CJDBCStream

extends java.lang.Object

This is a useful stream class to compress and decompress object to a stream.

Author:

Nicolas Modrzyk

Field Summary

static int

CLEAN_INTERVAL Clean the stream after CLEAN_INTERVAL call to writeUnshared

Constructor Summary

CJDBCStream()

Method Summary

static byte[]	compressObject(java.lang.Object obj) Compress an object from its java form to byte array
static int	countBytes(java.lang.Object obj) Statistic method to count the number of bytes of a class.
static java.lang.Object	decompressObject(byte[] array) Decompress an object from its byte-compressed form to java object

Methods inherited from class java.lang.Object

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

Field Detail

CLEAN_INTERVAL

public static final int CLEAN_INTERVAL

Clean the stream after CLEAN_INTERVAL call to writeUnshared

See Also:

Constant Field Values

Constructor Detail

CJDBCStream

public CJDBCStream()

Method Detail

decompressObject

public static final java.lang.Object decompressObject(byte[] array)
                                               throws java.io.IOException,
                                                      java.lang.ClassNotFoundException

Decompress an object from its byte-compressed form to java object

Parameters:

array - of bytes

Returns:

the object if it can be retrieved

Throws:

java.io.IOException - if fails to read

java.lang.ClassNotFoundException - if class of object does not exist

compressObject

public static final byte[] compressObject(java.lang.Object obj)
                                   throws java.io.IOException

Compress an object from its java form to byte array

Parameters:

obj - to compress

Returns:

byte array

Throws:

java.io.IOException - if fails to read

countBytes

public static final int countBytes(java.lang.Object obj)
                            throws java.io.IOException

Statistic method to count the number of bytes of a class.

Parameters:

obj - to count bytes

Returns:

the number of bytes

Throws:

java.io.IOException - if fails to read