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

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

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 365232 2005-12-21 22:36:07Z tomdz $
Author:
Matthew Baird
See Also:
Serialized Form

Constructor Summary
BlankString2NullFieldConversion()
           
 
Method Summary
 java.lang.Object javaToSql(java.lang.Object source)
          Convert an object of the persistent class to a counterpart object supported by the JDBC specification.
 java.lang.Object sqlToJava(java.lang.Object source)
          Convert a JDBC object to a persistent class value.
 
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 an object of the persistent class to a counterpart object supported by the JDBC specification.

Specified by:
javaToSql in interface FieldConversion

sqlToJava

public java.lang.Object sqlToJava(java.lang.Object source)
Description copied from interface: FieldConversion
Convert a JDBC object to a persistent class value.

Specified by:
sqlToJava in interface FieldConversion


(C) 2002 - 2006 Apache Software Foundation
All rights reserved. Published under the Apache License 2.0.
http://db.apache.org/ojb
Version: 1.0.4, 2005-12-30