How to exclude Weld metadata from JSON object serialization - jax-rs

Question

Assume the following REST resource:
#Path("/ActiveLeadTask")
//Also possible MediaType.APPLICATION_XML
#Produces(MediaType.APPLICATION_JSON)
public class ActiveLeadTask {
private #Inject ActiveLeadTaskBo activeLeadBo;
#GET
#Path("/getBo")
public ActiveLeadTaskBo getBo() {
return activeLeadBo;
}
}
////////////////////////////////////////////////////
#XmlRootElement
#XmlAccessorType(XmlAccessType.PUBLIC_MEMBER)
public class ActiveLeadTaskBo implements Serializable {
private static final long serialVersionUID = 1L;
private String firstName;
private String lastName;
private String phoneNumber;
private String phoneCountryCode;
private AtomicInteger accessCounterField = new AtomicInteger(0);
public ActiveLeadTaskBo() {
firstName = "test";
lastName = "test";
}
public int getAccessCounter() {
return accessCounterField.incrementAndGet();
}
public void setAccessCounter(int seed) {
accessCounterField.set(seed);
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
The REST response for getBo() JSON (but not for XML) returns the following:
{
"accessCounter": 1,
"firstName": "test",
"lastName": "test",
"metadata": {
"contextualInstance": {
"accessCounter": 2,
"firstName": "test",
"lastName": "test"
},
"instance": {
"accessCounter": 3,
"firstName": "test",
"lastName": "test"
}
}
}
The JSON response contains an additional "metadata" field - how can I configure the project to not generate it, or avoid generating it? The CDI container is Weld and the JSON serializer is provided by Yasson.

Answer 1

Two solutions are possible:
create a wrapper class, for example, ActiveLeadTaskBoInjectWrapper:
#Inject
ActiveLeadTaskBoInjectWrapper activeLeadBo;
activeLeadBo.getInstance();
workaround Weld specifics:
#Inject
Foo foo;
public void doSomething() {
if (foo instanceof WeldClientProxy) {
// foo is a proxy
((WeldClientProxy)foo).getMetadata().getContextualInstance()
} else {
// not a proxy
}
}

Answer 2

Depends on what JSON processing framework is used in your REST endpoint. For jsonb-api (jsr367) the only possible solution is to implement javax.json.bind.config.PropertyVisibilityStrategy to exclude generated properties from processing.