JAX-RS：从post（）响应中检索属性

Question

I need to retrieve an attribute from a Response object which is returned from a post() invocation: in particular, I'm using Neo4J and after posting a node I would like to retrieve its Id, which is an attribute in the returned XML code. My current post looks like this:

Response res = target.path("resource/node").request(MediaType.APPLICATION_XML)
              .post(Entity.entity(node, MediaType.APPLICATION_XML));

Then I perform a check on the returned HTTP status and I would also need the node Id, which is returned in:

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<node xmlns="http://www.namespace.org/Neo4J" id="140">
 ... node properties ...
</node>

I tried to cast res.getEntity() to a Document but it causes the following:

java.lang.ClassCastException: org.glassfish.jersey.client.internal.HttpUrlConnector$2 cannot be cast to org.w3c.dom.Document

Thanks in advance.

Answer 1

You can use JAXB to map POST body XML data to java object:

Payload entity = res.getEntity(Payload.class);
String id = payload.id;

where Payload you can define to reflect your XML structure:

import javax.xml.bind.annotation.*;


@XmlRootElement(name="node")
@XmlAccessorType(XmlAccessType.FIELD)
public class Payload {
    @XmlAttribute(name = "id")
    String id; // for example
}