I think even that is ambiguous.
On Thu, Feb 12, 2009 at 8:29 AM, Christian Edward Gruber
<christianedwardgru...@gmail.com> wrote:
> Would an @OverrideDefault annotation be appropriate here as a signal? (I'd
> just say just @Override for readability, but that's been used)
>
> Christian
>
> On 12-Feb-09, at 11:10 , Howard Lewis Ship wrote:
>
>> It looks to me like theres an ambiguity here: I don't think a child
>> component should be allowed to declare a second parameter, "name" in
>> this example, that is already defined in a super-class.
>>
>> On Wed, Feb 11, 2009 at 12:20 PM, Yunhua Sang <yunhua.s...@gmail.com>
>> wrote:
>>>
>>> Hello Howard,
>>>
>>> It turns out the error occurs only when the child wants to provide its
>>> own default binding for a parameter originally defined in parent;
>>> example:
>>>
>>> public class Parent {
>>> @Parameter
>>> private String name;
>>> void setupRender() {
>>> name.toUpperCase(); // NPE happens here
>>> }
>>> }
>>>
>>> public class Child extends Parent{
>>> @Parameter("prop:name")
>>> private String name;
>>> public String getName() {
>>> return "Tom";
>>> }
>>> }
>>>
>>> Page class:
>>> public class ChildExample {
>>> @Component
>>> private Child child;
>>> }
>>>
>>> Template ChildExample.tml:
>>> <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
>>> <h3>Test</h3>
>>> <t:child t:id="child"/>
>>> </html>
>>>
>>> I am sorry for my previous inaccurate information and thanks for
>>> looking into it.
>>>
>>> Yunhua
>>>
>>>
>>> On Wed, Feb 11, 2009 at 2:15 PM, Howard Lewis Ship <hls...@gmail.com>
>>> wrote:
>>>>
>>>> I'm not aware of anything that's changed in this area; could you
>>>> elaborate?
>>>>
>>>> On Wed, Feb 11, 2009 at 10:56 AM, Yunhua Sang <yunhua.s...@gmail.com>
>>>> wrote:
>>>>>
>>>>> Hello all,
>>>>>
>>>>> It seems there is no clear document about how to access a parameter
>>>>> defined in parent component; previous to 5.0.18, I was using the way
>>>>> of declaring the parameter again in child class and it worked well;
>>>>> however looks like some changes in 5.1.0.0 broke the way, seems there
>>>>> is no link between the parameter with same name in parent and child
>>>>> now.
>>>>>
>>>>> The problem is when I am USING a tapestry component, it's such a
>>>>> comfortable experience; but when I write a sub-class of a component, I
>>>>> am getting frustrated: a lot of methods are package visible; there is
>>>>> no clear way for parameter manipulation, a typical question: can I
>>>>> update an attibute of parameter in parent class? If inheritance is not
>>>>> a good practice in Tapestry, there should be a document about it.
>>>>>
>>>>> Thanks in advance for any help,
>>>>> Yunhua
>>>>>
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>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Howard M. Lewis Ship
>>>>
>>>> Creator Apache Tapestry and Apache HiveMind
>>>>
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>>>>
>>>>
>>>
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>>>
>>
>>
>>
>> --
>> Howard M. Lewis Ship
>>
>> Creator Apache Tapestry and Apache HiveMind
>>
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>>
>
> Christian Edward Gruber
> e-mail: christianedwardgru...@gmail.com
> weblog: http://www.geekinasuit.com/
>
>
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>
--
Howard M. Lewis Ship
Creator Apache Tapestry and Apache HiveMind
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