Hi
On 15/04/12 19:09, Ron Grabowski wrote:
This post was helpful in showing how to set a custom JSONProvider both with and
without Spring:
http://stackoverflow.com/a/6344047
You can do:
<init-param>
<param-name>jaxrs.providers</param-name>
<param-value>
org.apache.cxf.jaxrs.provider.JSONProvider
(writeXsiType=false)
</param-value>
</init-param>
I updated that thread too
I'm assuming custom providers are registered before or override the built-in
ones so they get to inspect things first?
Yes
Here's some test cases explaining what I'm trying to do:
@Test // passes
public void JSONProviderIncludesNil() throws Exception {
JSONProvider p = new JSONProvider();
Widget widget = new Widget();
widget.setName("Hello World");
String json = toJson(p, widget, "widget", Widget.class);
assertEquals("{\"widget\":{\"id\":{\"@xsi.nil\":\"true\"},\"name\":\"Hello
World\"}}", json);
}
@Test // fails
public void OmitNillJSONProviderExcludesNil() throws Exception {
JSONProvider p = new OmitNillJSONProvider();
Widget widget = new Widget();
widget.setName("Hello World");
String json = toJson(p, widget, "widget", Widget.class);
assertEquals("{\"widget\":{\"name\":\"Hello World\"}}", json);
}
private<T> String toJson(JSONProvider p, T item, String root, Class<T>
classOfT) throws Exception {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
p.writeTo(
new JAXBElement<T>(new QName("", root), classOfT, item), // hack ???
classOfT, classOfT,
classOfT.getAnnotations(),
MediaType.APPLICATION_JSON_TYPE,
new MetadataMap<String, Object>(),
stream);
return stream.toString();
}
// yes, I know XmlRootElement is missing
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "widget", propOrder = {"id","name"})
public static class Widget {
@XmlElement(nillable = true) // can't change
protected Integer id;
@XmlElement(nillable = true) // can't change
protected String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public class OmitNillJSONProvider extends JSONProvider {
// ???
}
Maybe I should bypass all this jaxb annotation sillyness and just let gson
handle serializing the object as if it didn't have any annotations?
JSONProvider is a default provider but if some other JSON provider can
handle this situation better, with or without JAXB, then it can be
easily registered too
HTH, Sergey
________________________________
From: Ron Grabowski<[email protected]>
To: "[email protected]"<[email protected]>
Sent: Saturday, April 14, 2012 10:17 PM
Subject: JAX-RS in v2.5.x: how to set custom JSONProvider(?) without Spring to stop
{"@xsi.nil":"true"}
I have objects with fields setup like this:
@XmlElement(nillable = true)
protected Integer id;
that I send out via JAX-RS with @Produces(MediaType.APPLICATION_JSON). The json
payload ends up like this when the fields aren't set:
"id":{"@xsi.nil":"true"}
I can't change the @XmlElement on the field because another part of my system
depends on it. I want to either output:
"id" : null
or ideally not output that field at all in the json payload. I think I need
extend the built in JSONProvder and tweak it (and/or Jettison) a little bit.
How can I do that without Spring? Can someone explain a solution both in terms
of web.xml and JAXRSServerFactoryBean (unit testing)?
Thanks,
Ron
--
Sergey Beryozkin
Talend Community Coders
http://coders.talend.com/
Blog: http://sberyozkin.blogspot.com
