[CXF-5509] NullPointerException if class with generic-array parameters is set to rootClassNames

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7.8
• Component/s: Aegis Databinding
• Labels: NPE aegis binding cxf generic

Environment

RHEL6.3 (64b), JDK1.6, Spring 3.0.6, CXF 2.7.8

• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Bright Zheng
• Created: 22/Jan/14 08:39
• Updated: 28/Jan/14 15:05

Description

I want to expose a set of classes by setting the aegisContext:

<bean id="aegisContext" class="org.apache.cxf.aegis.AegisContext" scope="prototype">
        <property name="writeXsiTypes" value="true"/>
        <property name="rootClassNames">
            <ref bean="bindingList"/>
        </property>
</bean>

One of the class in the list is as a response pojo which has generic-array field like:

public class Subject<T extends Score>{
...
	private T[] score;
        //and getter/setter also
...

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:

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;
    }

Note: the arrayBaseType will always be null while initializing that class so it will cause the next line of code NPE!!

Did I miss anything for this kind of class mapping while using aegis?