You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@struts.apache.org by Nuno Oliveira <no...@itclinical.com> on 2016/12/02 19:47:11 UTC
Why is the Action not being populated correctly with a
List?
Hi, I have an DummyAction{
private List<Record> records;
}
which has the following converter
DummyAction-conversion.properties:
KeyProperty_records=id
Element_records=com.package.model.RecordImpl
CreateIfNull_records=true
When the value stack is being populated in the ParametersInterceptor
method setParameter()
newStack.setParameter(name, value);
the list records is not populated correctly.
Looking for the problem I see that in the OgnlValueStack class an
exception is caught telling me that the Interface Record cannot be
instantiated.
The method is:
private void setValue(String expr, Object value, boolean
throwExceptionOnFailure, boolean evalExpression) {
Map<String, Object> context = getContext();
try {
trySetValue(expr, value, throwExceptionOnFailure, context,
evalExpression);
} catch (OgnlException e) {
handleOgnlException(expr, value, throwExceptionOnFailure,
e);
} catch (RuntimeException re) { //XW-281
handleRuntimeException(expr, value, throwExceptionOnFailure,
re);
} finally {
cleanUpContext(context);
}
}
And the exception is:
Error creating bean with name 'com.package.model.Record':
Instantiation of bean failed; nested exception is
org.springframework.beans.BeanInstantiationException: Could not
instantiate bean class [com.package.model.Record]: Specified
class is an interface - Class:
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
File: AbstractAutowireCapableBeanFactory.java
Method: instantiateBean
Line: 1037 -
org/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java:1037:-1
Now I know I can't instantiate interfaces and changing the list type to:
private List records;
there is no exception and the list records has the correct values but,
in both ways my converter does not seen to be used (I'm testing this
using a breakpoint in XWorkConverter).
So my questions are:
1) Which is the proper way of using the conversion when declaring the
List type as an interface, List<Record>?
2) Why is my converter not being used in either situation of declaring
List and List<Record>?
This question is related to Miguel Almeida post if you want to check
additional context, but I think this information should be sufficient.
Thanks
---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
For additional commands, e-mail: user-help@struts.apache.org
Re: Why is the Action not being populated correctly with a List?
Posted by Lukasz Lenart <lu...@apache.org>.
I think you should rather use xwork-conversion.properties and
com.package.model.Record=com.package.web.RecordConverter
Struts will try to automatically convert elements of the list to given type
Regards
--
Łukasz
+ 48 606 323 122 http://www.lenart.org.pl/
2016-12-02 20:47 GMT+01:00 Nuno Oliveira <no...@itclinical.com>:
> Hi, I have an DummyAction{
>
> private List<Record> records;
> }
>
> which has the following converter
>
> DummyAction-conversion.properties:
> KeyProperty_records=id
> Element_records=com.package.model.RecordImpl
> CreateIfNull_records=true
>
> When the value stack is being populated in the ParametersInterceptor
> method setParameter()
>
>
> newStack.setParameter(name, value);
>
> the list records is not populated correctly.
> Looking for the problem I see that in the OgnlValueStack class an
> exception is caught telling me that the Interface Record cannot be
> instantiated.
> The method is:
>
> private void setValue(String expr, Object value, boolean
> throwExceptionOnFailure, boolean evalExpression) {
> Map<String, Object> context = getContext();
> try {
> trySetValue(expr, value, throwExceptionOnFailure, context,
> evalExpression);
> } catch (OgnlException e) {
> handleOgnlException(expr, value, throwExceptionOnFailure,
> e);
> } catch (RuntimeException re) { //XW-281
> handleRuntimeException(expr, value, throwExceptionOnFailure,
> re);
> } finally {
> cleanUpContext(context);
> }
> }
>
> And the exception is:
>
> Error creating bean with name 'com.package.model.Record':
> Instantiation of bean failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Could not
> instantiate bean class [com.package.model.Record]: Specified
> class is an interface - Class:
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
> File: AbstractAutowireCapableBeanFactory.java
> Method: instantiateBean
> Line: 1037 -
> org/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java:1037:-1
>
> Now I know I can't instantiate interfaces and changing the list type to:
>
> private List records;
>
> there is no exception and the list records has the correct values but,
> in both ways my converter does not seen to be used (I'm testing this
> using a breakpoint in XWorkConverter).
>
> So my questions are:
> 1) Which is the proper way of using the conversion when declaring the
> List type as an interface, List<Record>?
> 2) Why is my converter not being used in either situation of declaring
> List and List<Record>?
>
> This question is related to Miguel Almeida post if you want to check
> additional context, but I think this information should be sufficient.
>
> Thanks
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
For additional commands, e-mail: user-help@struts.apache.org