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How to get CXF to understand the map <String, <List <MyBean>>?

My calm method returns Map<String,List<MyBean>>, but I can't figure out how to get CXF and JAXB to serialize this as XML.

I want it to look something like this (although I have not all been so worried about how it gets serialized while it works on both sides);

<response>
  <items key="a">
    <item>
      ....
    </item>
    <item>
      ....
    </item>
  </items>
  <items key="b">
    <item>
      ....
    </item>
  </items>
</response>

If I return only Map, I get:

[org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor] A message body writer was not found for the HashMap response class.

If I try to use a wrapper object, I get:

[org.apache.cxf.jaxrs.provider.AbstractJAXBProvider] java.util.List is an interface, and JAXB cannot process interfaces.

Any suggestions? Is this just a CXF problem (I'm using version 2.3.2)? I'm sure I had a similar job in Jersey.

+3
4

- , . , , Map , List List.

@XmlRootElement
public class MyResponse {

  private List<ItemListWrapper> items;

  //getters and setters
}

@XmlType
public class ItemListWrapper {

  private String key;
  private List<Item> items;

  @XmlAttribute
  public String getKey() {
    return this.key;
  }

  //rest of the getters and setters

}

@XmlType
public class Item {
  //just a bean
}
+3

, CXF , . aegis Java Map to XML.

" " : xfire. ( / aegis CXF, xfire. aegis , xfire 2.0 CXF)

, .

+1

Why not try using a specific List implementation? Or create your own marshaller who will try to figure out which list you are dealing with.

http://fusesource.com/docs/esb/4.3.1/cxf_interceptors/CXFInterceptorIntro.html

http://cxf.apache.org/custom-cxf-transport.html

0
source

You can specify the configuration for msg-handlers / providers as follows if you are using CXF 2.3.2 with Spring:

<jaxrs:server id="restContainer" address="/">
    <jaxrs:serviceBeans>
        <ref bean="yourRestfulServiceBeanId"/>
    </jaxrs:serviceBeans>
    <jaxrs:extensionMappings>
        <entry key="xml" value="application/xml"/>
    </jaxrs:extensionMappings>
    <jaxrs:providers>
        <ref bean="jaxbXmlProvider"/>
    </jaxrs:providers>
</jaxrs:server>

<!-- Webservice message handlers -->  
<bean id="jaxbXmlProvider" class="org.apache.cxf.jaxrs.provider.JAXBElementProvider">
    <property name="jaxbElementClassMap" ref="propertiesMap"/>
</bean>

<util:map id="propertiesMap">
    <entry key="jaxb.formatted.output">
        <value type="java.lang.Boolean">true</value>
    </entry>
</util:map>

The handler will see the JAXB annotations and generate the required output.

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