Question

I want to retrieve a Map from a using JAX-RS (text/xml)

@GET
public Map<String,String> getMap(){
}

but I am getting the error below:

0000001e FlushResultHa E org.apache.wink.server.internal.handlers.FlushResultHandler handleResponse The system could not find a javax.ws.rs.ext.MessageBodyWriter or a DataSourceProvider class for the java.util.HashMap type and application/x-ms-application mediaType.  Ensure that a javax.ws.rs.ext.MessageBodyWriter exists in the JAX-RS application for the type and media type specified.
[10:43:52:885 IST 07/02/12] 0000001e RequestProces I org.apache.wink.server.internal.RequestProcessor logException The following error occurred during the invocation of the handlers chain: WebApplicationException (500 - Internal Server Error) with message 'null' while processing GET request sent to http://localhost:9080/jaxrs_module/echo/upload/getSiteNames

Answer 1

The solution I choose is to wrap a Map and use it for the return param.

@XmlRootElement
public class JaxrsMapWrapper {

    private Map<String,String> map;

    public JaxrsMapWrapper(){

    }

    public void setMap(Map<String,String> map) {
        this.map = map;
    }

    public Map<String,String> getMap() {
        return map;
    }
}

and the method signature will go like this

@GET
public JaxrsMapWrapper getMap()