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
