<inputText value="#{mybean.adouble}" />
requires input of 5.0 (DoubleConverter does this "Double.valueOf(value)"if you want 5,0 (where , is the decimal separator, like in Germany), you need a numberConverter with pattern or locale. -Matthias On 9/13/07, Michael Heinen <[EMAIL PROTECTED]> wrote: > Damn, I tested a little bit more and now there is another problem. > If I enter 5.0 or 5,0 (depending on the locale) I get the following > exception: > > Exception setting property Threshold: of base with class > com.recommind.litigation.client.web.model.Category, Bean: > com.recommind.litigation.client.web.model.Category, property: > Threshold:, newValue: 5,newValue class: java.lang.Long method parameter > class: java.lang.Double, argument type mismatch > > The NumberConverter returns a Long instead of a Double! > > How can I get a simple automatic NumberConversion working ? > This is really annoying! > > Michael > > > -----Original Message----- > From: Michael Heinen [mailto:[EMAIL PROTECTED] > Sent: Donnerstag, 13. September 2007 10:09 > To: MyFaces Discussion > Subject: RE: number conversion and null values > > Thanks Ben, this solved the problem. > Changing only the setter was not sufficient. > I have to change the getter and the type also to Double, as you said. > > Michael > > -----Original Message----- > From: Ben Smith [mailto:[EMAIL PROTECTED] > Sent: Mittwoch, 12. September 2007 22:06 > To: MyFaces Discussion > Subject: Re: number conversion and null values > > You should definitely be using Double instead of double, because > otherwise you have no way to store it when the user leaves the field > blank (unless the user isn't allowed to leave it blank). > > When you tried setTreshold(Double treshold), did you also change the > getter to return a Double instead of a double? I believe the setter > and getter have to use the same type. > > Also, the variable you store the threshold in should be a Double too > so that you can store the fact that the user entered nothing. > Otherwise you would have the problem of how do you convert from a > Double that is null to a double that cannot be null. > > Offtopic: the primitive/Object duality is one of the many concepts in > Java that make it a bit inelegant. > > --Ben > > On 9/12/07, Michael Heinen <[EMAIL PROTECTED]> wrote: > > The problem is independent of the used pattern. > > I removed the pattern and got the same error message. > > The NumberConverter.getAsObject returns null if the value is null or > if > > value.length() is 0. > > > > > > I think the problem is that JSF does not find an appropriate setter > for > > setting null! > > > > I am also not sure whether the NumberConverter has to return null or 0 > > in this case, which is the default for primitive numeric values. > > > > Any ideas ? > > > > > > -----Original Message----- > > From: Mike Kienenberger [mailto:[EMAIL PROTECTED] > > Sent: Dienstag, 11. September 2007 22:52 > > To: MyFaces Discussion > > Subject: Re: number conversion and null values > > > > Maybe <f:convertNumber pattern="###.##"/> instead? I'm not an expert > > on format patterns, but doesn't 0 mean "at least one digit?" > > > > > > > > On 9/11/07, Michael Heinen <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > > > I have a conversion problem with doubles and null values. > > > > > > > > > > > > JSP snippet: > > > > > > <h:inputText > > > > > > value="#{!empty MyController.category&& > > MyController.category.treshold>=0? > > > MyController.category.treshold:''}"> > > > > > > <f:convertNumber pattern="##0.##"/> > > > > > > </h:inputText> > > > > > > > > > > > > Class Category > > > > > > public double getTreshold() > > > > > > { > > > > > > return this.mTreshold; > > > > > > } > > > > > > public void setTreshold(double treshold) > > > > > > { > > > > > > this.mTreshold = treshold; > > > > > > } > > > > > > > > > > > > This is working fine if I enter valid doubles. > > > > > > The following message is displayed if I enter nothing in the input > > field: > > > > > > > > > > > > Exception setting property Threshold: of base with class > > > com.recommind.litigation.client.web.model.Category, Bean: > > > com.recommind.litigation.client.web.model.Category, > > > property: Threshold:, newValue: null ,newValue class: null method > > parameter > > > class: double, null > > > > > > > > > > > > The getAsObject method of the NumberConverter returns null as > > expected. > > > > > > > > > > > > What should I do now with the treshold property of the Category > class > > ? > > > > > > I tried without success: > > > > > > - setTreshold(Double treshold) > > > > > > - setTreshold(Number treshold) > > > > > > > > > > > > A workaround is to set the value to 0 via javascript but this is not > a > > good > > > alternative. > > > > > > > > > > > > Michael > > > > > > > -- Matthias Wessendorf further stuff: blog: http://matthiaswessendorf.wordpress.com/ mail: matzew-at-apache-dot-org
