org.apache.ojb.broker.accesslayer.conversions
Class BlankString2NullFieldConversion

java.lang.Object
  extended byorg.apache.ojb.broker.accesslayer.conversions.BlankString2NullFieldConversion
All Implemented Interfaces:
FieldConversion, java.io.Serializable

public class BlankString2NullFieldConversion
extends java.lang.Object
implements FieldConversion

this implementation of the FieldConversion interface converts between blank strings ("") and nulls values in the rdbms. This is to make oracle and SQL Server compatible, as Oracle stores blank strings as nulls, which makes comparisons on re-materialized objects problematic.

Version:
$Id: BlankString2NullFieldConversion.java,v 1.3 2003/01/19 12:17:18 brj Exp $
Author:
Matthew Baird
See Also:
Serialized Form

Field Summary
 
Fields inherited from interface org.apache.ojb.broker.accesslayer.conversions.FieldConversion
serialVersionUID
 
Constructor Summary
BlankString2NullFieldConversion()
           
 
Method Summary
 java.lang.Object javaToSql(java.lang.Object source)
          convert a Java object to its SQL pendant, used for insert & update
 java.lang.Object sqlToJava(java.lang.Object source)
          convert a SQL value to a Java Object, used for SELECT
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BlankString2NullFieldConversion

public BlankString2NullFieldConversion()
Method Detail

javaToSql

public java.lang.Object javaToSql(java.lang.Object source)
Description copied from interface: FieldConversion
convert a Java object to its SQL pendant, used for insert & update

Specified by:
javaToSql in interface FieldConversion

sqlToJava

public java.lang.Object sqlToJava(java.lang.Object source)
Description copied from interface: FieldConversion
convert a SQL value to a Java Object, used for SELECT

Specified by:
sqlToJava in interface FieldConversion


Authors: Thomas Mahler and others. (C) 2000 - 2003 Apache Software Foundation
All rights reserved. Published under the Apache License.
http://db.apache.org/ojb
Version: 1.0.rc5, 2003-12-14