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https://issues.apache.org/struts/browse/WW-2471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=43149#action_43149
]
Sami Dalouche commented on WW-2471:
-----------------------------------
The work-around I found was to move the converters to some other properties
file (xwork-conversion-hack.properties, for instance), and to make sure the
code is loaded before any action executes, by creating a filter such as :
public class Struts2HackFilter implements Filter {
boolean initialized = false;
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) throws IOException, ServletException {
if(!initialized) {
initXWorkConverter();
initialized = true;
}
filterChain.doFilter(request, response);
}
public void initXWorkConverter() throws ServletException {
try {
XWorkConverter xworkConverter =
Dispatcher.getInstance().getContainer().getInstance(XWorkConverter.class);
xworkConverter.loadConversionProperties("xwork-conversion-hack.properties");
} catch(IOException e) {
throw new RuntimeException(e);
}
}
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
and of course, it is necessary to map it in web.xml AFTER struts2 filter
<filter-mapping>
<filter-name>struts2hack</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
This is the temporary solution I am using in the meanwhile....
> NPE in XWorkConverter.loadConversionProperties after adding DateConverter is
> still not fixed in 2.1.0
> -----------------------------------------------------------------------------------------------------
>
> Key: WW-2471
> URL: https://issues.apache.org/struts/browse/WW-2471
> Project: Struts 2
> Issue Type: Bug
> Affects Versions: 2.1.0
> Reporter: Sami Dalouche
>
> Same problem as : WW-1978, the problem is still not fixed in 2.1.0, nor in
> 2.1.1-SNAPSHOT
> when xwork-conversion.properties contains an entry, Struts 2 startup throws a
> NPE :
> [ERROR] [2008-02-03 17:09:16,181]
> [com.opensymphony.xwork2.conversion.impl.XWorkConverter] (main,) : Conversion
> registration error
> java.lang.NullPointerException
> at
> com.opensymphony.xwork2.conversion.impl.XWorkConverter.createTypeConverter(XWorkConverter.java:729)
> at
> com.opensymphony.xwork2.conversion.impl.XWorkConverter.loadConversionProperties(XWorkConverter.java:756)
> at
> com.opensymphony.xwork2.conversion.impl.XWorkConverter.<init>(XWorkConverter.java:184)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> at
> com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.construct(ContainerImpl.java:388)
> at
> com.opensymphony.xwork2.inject.ContainerBuilder$5.create(ContainerBuilder.java:211)
> at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:49)
> at
> com.opensymphony.xwork2.inject.ContainerImpl$ParameterInjector.inject(ContainerImpl.java:431)
> at
> com.opensymphony.xwork2.inject.ContainerImpl.getParameters(ContainerImpl.java:446)
> So, it looks like the object factory is not set in XWorkConverter :
> Object obj = objectFactory.buildBean(className, null);
> Is there a quick work-around ?
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