I guess there is an error in the ProviderFactory of jaxrs component.
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Key: CXF-1727
URL: https://issues.apache.org/jira/browse/CXF-1727
Project: CXF
Issue Type: Bug
Components: REST
Affects Versions: 2.1.2
Environment: Windowx XP, Apache Tomcat and i used spring configuration
Reporter: Frank Ittermann
I thin in the method createExceptionMapper of the
org.apache.cxf.jaxrs.provider.ProviderFactory class is an error.
The following code block is wrong i guess:
if (exceptionType.isAssignableFrom((Class<?>)args[i])) {
InjectionUtils.injectContextFields(em.getProvider(), em, m);
InjectionUtils.injectContextMethods(em.getProvider(), em, m);
return em.getProvider();
}
The if doesn't work correctly. I wrote a ExceptionMapper<Exception> for the
general Exception class. And i tested this ExceptionMapper with a throw of a
IOException and it was not called. So I decided to debug the ExceptionMapper
staff and i found that the if in the code block a above is false.
So i wrote a little test to understand this.
System.out.println(IOException.class.isAssignableFrom(Exception.class));
System.out.println(Exception.class.isAssignableFrom(IOException.class));
The first line of code is what your if does and if you check this you will see
it returns false. But Exception is the super class
of IOException how could it possible. The answer is easy because the
isAssignableFrom method check if the
passed class parameter is the same or a child of the class on which
isAssignableForm was called. So The bug fix will be the second line they return
true.
Please change the wrong code block the right order of parameter will be
if (((Class<?>)args[i]).isAssignableFrom(exceptionType))
Thank for your attention
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