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From "Bright Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CXF-5509) NullPointerException if class with generic-array parameters is set to rootClassNames
Date Tue, 28 Jan 2014 02:11:38 GMT

    [ https://issues.apache.org/jira/browse/CXF-5509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13883661#comment-13883661
] 

Bright Zheng commented on CXF-5509:
-----------------------------------

Hi Aki,

The test case is just for service testing purpose.

While starting it up by mvn jetty:run, you can see the NPE during CXF initialization.
As the CXF couldn't startup properly, I didn't add any test cases for Web Service yet.

Hope it clarifies.
Regards, Bright


> NullPointerException if class with generic-array parameters is set to rootClassNames
> ------------------------------------------------------------------------------------
>
>                 Key: CXF-5509
>                 URL: https://issues.apache.org/jira/browse/CXF-5509
>             Project: CXF
>          Issue Type: Bug
>          Components: Aegis Databinding
>    Affects Versions: 2.7.8
>         Environment: RHEL6.3 (64b), JDK1.6, Spring 3.0.6, CXF 2.7.8
>            Reporter: Bright Zheng
>              Labels: NPE, aegis, binding, cxf, generic
>         Attachments: learning-spring_cxf.zip
>
>
> I want to expose a set of classes by setting the aegisContext:
> {code:xml}
> <bean id="aegisContext" class="org.apache.cxf.aegis.AegisContext" scope="prototype">
>         <property name="writeXsiTypes" value="true"/>
>         <property name="rootClassNames">
>             <ref bean="bindingList"/>
>         </property>
> </bean>
> {code}
> One of the class in the list is as a response pojo which has generic-array field like:
> {code:java}
> public class Subject<T extends Score>{
> ...
> 	private T[] score;
>         //and getter/setter also
> ...
> {code}
> During the deployment phase, while debugging with the CXF code, I found that below codes
in TypeUtil.java under cxf-rt-databinding-aegis-2.7.8.jar will case issue:
> {code:java}
> public static Class<?> getTypeRelatedClass(Type type) {
>         Class<?> directClass = getTypeClass(type, false);
>         if (directClass != null) {
>             return directClass;
>         }
>         
>         if (type instanceof ParameterizedType) {
>             ParameterizedType pType = (ParameterizedType) type;
>             return getTypeRelatedClass(pType.getRawType());
>         }
>         
>         if (type instanceof GenericArrayType) {
>             GenericArrayType gat = (GenericArrayType) type;
>             Type compType = gat.getGenericComponentType();             
>             Class<?> arrayBaseType = getTypeRelatedClass(compType);
>             // believe it or not, this seems to be the only way to get the
>             // Class object for an array of primitive type.
>             Object instance = Array.newInstance(arrayBaseType, 0);
>             return instance.getClass();
>         }
>         return null;
>     }
> {code}
> {color:red}
> Note: the arrayBaseType will always be null while initializing that class so it will
cause the next line of code NPE!!
> {color}
> Did I miss anything for this kind of class mapping while using aegis?



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