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From Dimitris Tsitses <4.biz....@gmail.com>
Subject Re: [beanutils] beanutils library cannot invoke the correct accessor
Date Sun, 06 Jun 2010 16:55:15 GMT
myProperty is of one type only. The overloaded setters are there only for convenience, i.e.,
to convert to the type of myProperty before setting it. I don't think the JavaBeans spec disallows
that, if it did, that would mean that the JavaBeans spec undermines Java's spec! (i.e., do
you like method overloading? Well, you can't use it here!). That would of course severally
restrict JavaBeans usefulness. 


On 2010-06-06, at 5:50 AM, James Carman wrote:

> That violates the JavaBeans specification.  "myProperty" is supposed
> to be of one type only.
> 
> On Sat, Jun 5, 2010 at 10:02 PM, Dimitris Tsitses <4.biz.etc@gmail.com> wrote:
>> Hi all, I'm trying to do something really simple but I can't seem to figure it out,
I hope someone can help.
>> 
>> I have a simple bean:
>> 
>> 
>> public class MyBean {
>>        private ClassTypeA myProperty;
>> 
>>        public void setMyProperty(ClassTypeA anObj) {
>>                this.myProperty = anObj;
>>        }
>>        public void setMyProperty(ClassTypeB anObj) {
>>                this.myProperty = Converter.convertBtoA(anObj);
>>        }
>> 
>> }
>> 
>> If I invoke the setter by passing an instance of ClassTypeA, it works without a problem:
>> BeanUtils.setProperty(myBeanInst, "myProperty", instanceOfClassTypeA);
>> 
>> 
>> However if I invoke the setter by passing an instance of ClassTypeB, I get an exception
and the setter is never actually called:
>> BeanUtils.setProperty(myBeanInst, "myProperty", instanceOfClassTypeB);
>> java.lang.IllegalArgumentException: Cannot invoke.. la la la - argument type mismatch
-
>> 
>> I can't believe it is not possible to do that, I'm sure I'm just missing something.
Any help will be greatly appreciated.
>> 
>> Many thanks
>> Dimitris
> 
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