Required means that the value is required for the operation of the component. It does not mean that it must be explicitly bound when the component can provide a default. The parameter description will describe when a default can be provided automatically.
On Sun, Aug 21, 2011 at 5:20 AM, Bob Harner <bobhar...@gmail.com> wrote: > Wow, I am truly stunned. I'm not sure I've ever seen a piece of software so > completely disregard the common sense meaning of a commonly understood word. > So "required" sometimes means "optional if certain conditions are met > elsewhere". And users are just supposed to figure that out on their own??? > > Bob Harner > On Aug 21, 2011 7:03 AM, "Igor Drobiazko" <igor.drobia...@gmail.com> wrote: >> The semantics are "the parameter is required. If no value is bound, the >> component will TRY to find a default. The lookup for a default value might >> be successful or not". >> >> For example, imagine you pass a list of Users to AjaxFormLoop and don't > bind >> a ValueEncoder. If no ValueEncoder for User is contributed, no default can >> be found and the component will complain about missing binding. That makes >> sense as the parameter is required. >> >> If you are using Hibernate or JPA integration, there is a ValueEncoder >> contributed automatically for every entity. In such a case, the default > can >> be found even though you didn't contribute any ValueEncoder manually. >> >> In summary: depending on the configuration of your app, a default >> ValueEncoder can be found or not. That's why marking the encoder parameter >> as required makes absolutely sense. >> >> On Sun, Aug 21, 2011 at 3:50 AM, Bob Harner <bobhar...@gmail.com> wrote: >> >>> my other question would be why the "encoder" >>> parameter is marked as "required" for AjaxFormLoop, Hidden and >>> RadioGroup. After all, as Robert Z. says, those components seem to >>> have the ability to supply the default encoder based on the bound type >>> of value. My brain is a little sleep-deprived, so maybe I'm just not >>> understanding how this really makes sense. >>> >> >> >> >> >> -- >> Best regards, >> >> Igor Drobiazko >> http://tapestry5.de > -- Howard M. Lewis Ship Creator of Apache Tapestry The source for Tapestry training, mentoring and support. Contact me to learn how I can get you up and productive in Tapestry fast! (971) 678-5210 http://howardlewisship.com --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
