in case of jsf11; value="" ==> null as well, not valueBinding-object
-M On Dec 21, 2007 2:53 PM, Manfred Geiler <[EMAIL PROTECTED]> wrote: > My personal feeling is that getValueExpression should NOT return null > if explictly called with an empty String. > However, this is something for the Unified EL (ie. JSP) specification. > If this behaviour is unclear from the spec, it should be explicitly > defined there. > > --Manfred > > > > On 12/21/07, Matthias Wessendorf <[EMAIL PROTECTED]> wrote: > > Inside of Trinidad's EditableValueRenderer > > (org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.EditableValueRenderer) > > > > there getReadOnly(...), which is called by all inputXyz Renderers to > > check if the component should be rendered "readOnly" or not > > That method checks if the component is readOnly AND it also checks if > > the underlying EL is readOnly. > > > > If that method returns TRUE, the component is readOnly (and there for > > a inputText isn't editable)...makes sense, so far... > > > > Here is a "use-case" > > > > <tr:inputText label="Label a)" value=""/> > > (yes, may be stupid, but can happen...) > > > > Since the getReadOnly() checks if the EL is readOnly... it does this as > > well: > > > > ValueExpression ve = getValueExpression(bean); > > > > > > In Jetty (jetty-6.1.2rc2), which uses Sun/Glassfish/RI EL > > (com.sun.el.ValueExpressionImpl) > > ==> > > It returns an object that is readOnly (which is correct) and the > > getExpressionString is "" (empty). > > > > In tomcat 6. which uses this EL-Impl > > "org.apache.jasper.el.JspValueExpression", it returns NULL > > > > > > Now, I wonder what the correct EL behavior is. > > I tend to think, that Tomcat is right, because there is no > > ExpressionString, so not a "real" Expression, > > but others could have a different understanding of it. > > > > What is your take on that ? > > > > -- > > Matthias Wessendorf > > > > further stuff: > > blog: http://matthiaswessendorf.wordpress.com/ > > sessions: http://www.slideshare.net/mwessendorf > > mail: matzew-at-apache-dot-org > > > > > -- > http://www.irian.at > Your JSF powerhouse - JSF Consulting, > Development and Courses in English and > German > > Professional Support for Apache MyFaces > -- Matthias Wessendorf further stuff: blog: http://matthiaswessendorf.wordpress.com/ sessions: http://www.slideshare.net/mwessendorf mail: matzew-at-apache-dot-org
