This problems seems to be related to the version of tomcat being used:
I came accross this post online :
http://forums.sun.com/thread.jspa?forumID=427&threadID=5273588
and then tried 6.0.18 and 6.0.14. Previously I was using 6.0.16. The
problem indeed does not appear in 6.0.14, however both 6.0.16 and 18
are affected by it.
I found some other posts on this issue as well :
http://www.icefaces.org/JForum/posts/list/8024.page and
https://issues.apache.org/jira/browse/MYFACES-1979
I wonder what has changed, and how I can fix this
Alex
On 19 Oct 2008, at 21:04, Alexander Hartner wrote:
After having had the problem with null values not being returned as
nulls and reading some suggestion solution I added a converter to my
application.
...
<converter>
<converter-id>NullStringConverter</converter-id>
<converter-for-class>java.lang.String</converter-for-class>
<converter-
class>com.j2anywhere.addressbookserver.web.NullStringConverter</
converter-class>
</converter>
...
I then implemented it as follows:
...
public String getAsString(FacesContext context, UIComponent
component, Object object)
{
System.out.println("Converting to String : "+object);
if (object == null)
{
System.out.println("READING null");
return "NULL";
}
else
{
if (((String)object).equals(""))
{
System.out.println("READING null (Second Check)");
return null;
}
else
{
return object.toString();
}
}
}
public Object getAsObject(FacesContext context, UIComponent
component, String value)
{
System.out.println("Converting to Object: "+value
+"-"+value.trim().length());
if (value.trim().length()==0 || value.equals("NULL"))
{
System.out.println("WRITING null");
return null;
}
else
{
return value.toUpperCase();
}
}
...
I can see that it is converting my values, however the object to
which the inputText fields are bound are still set to empty strings ""
<h:inputText size="50"
value="#{addressBookController.contactDetails.information}"
converter="NullStringConverter"/>
Also when reading the object values any nulls are already converted
to empty strings before ariving at the converter. It seems that
there is a default converter handling string values.
How can I resolve this problem as set nulls when the input value is
an empty string other then checking every string in my class
individually. I would really hate to pollute my object model with
empty string tests.
Thanks in advance
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