Array properties nested in JSON object received as null - json

Question

I have Jersey PUT webservice which takes JSON/xml containing multiple arrays of objects-shown below as input.
{
"a" : [{"p1":"x1"},{"p2":"x2"}],
"b" : [{"q1":"y1"},{"q2":"y2"}],
"c" : [{"r1":"z1"},{"r2":"z2"}]
}
In the service class this gets converted in to JavaBean input param. I have verified the xsd mappings are correct.
The issue is, when I invoke the service with JSON as input, in server side javabean I see only the first value getting populated correctly but the second and third are always null.
In other words, if I pass the json as listed in below different combination scenarios, I see the corresponding results as mentioned.
{"a":[{}], "b":[{}], "c":[{}] }
Only "a" is received in JavaBean. "b" and "c" are received as null.
{"b":[{}], "c":[{}], "a":[{}] }
Only "b" is received in JavaBean. "c" and "a" are received as null.
{"c":[{}], "a":[{}], "b":[{}] }
Only "c" is received in JavaBean. "a" and "b" are received as null.
So it seems I get only first JSON key-value pair correctly no matter in what order I pass from client.
Thanks for helping out on this.
More details below:
This is legacy system and I do not have rights to share the actual code. The system is working fine with input of one-array, and requires to update, so it can accept multiple arrays in JSON as explained in question.
Here is what exactly different parts of the system looks like. Also I have verified that all the xml name-space and POJO properties etc are correct and annotated properly.
1) The CreateABCResource.java which implements PUT method:
//package x.y.z
//import javax.ws.rs.*..etc;
#Path("mypath")
public class CreateABCResource{
#Consumes( { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
#PUT
public AResponse doSomething(CreateABC createABC) {
AResponse x = new AResponse();
//business logic here
return x;
}
}
2) The input POJO CreateABC.java to service method PUT is as below:
//package com.x.y
//import ...;
#XmlAccessorType(XmlAccessType.FIELD)
#XmlType(name = "CreateABC", namespace = "urn:x", propOrder = {
"abc","def","pqr"
})
#XmlRootElement(name = "createAbc", namespace = "urn:x")
public class CreateABC {
#XmlElement(name = "abc", namespace = "urn:x")
protected List<Abc> abc = null;
#XmlElement(name = "def", namespace = "urn:x")
protected List<Def> def = null;
#XmlElement(name = "pqr", namespace = "urn:x")
protected List<Pqr> pqr = null;
#XmlAttribute(required = true)
protected String a;
#XmlAttribute(required = true)
protected String b;
#XmlAttribute(required = true)
protected String c;
//and so on ...
//getter setters...
}
3) The input JSON from client/fiddler tool for testing:
{
"a": "some value a",
"b": "some value b",
"c": "some value c",
"abc":[{},{}],
"def":[{},{}],
"pqr":[{},{}]
}
4) xsd containing the mappings for JAXB:
<xs:element name="createAbc" type="CreateABC" />
<xs:complexType name="CreateABC">
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" name="abc" type="Abc" />
<xs:element minOccurs="0" maxOccurs="unbounded" name="def" type="Def" />
<xs:element minOccurs="0" maxOccurs="unbounded" name="pqr" type="Pqr" />
</xs:sequence>
<!-- THIS IS COMMENTED, BUT THIS ALSO DIDNOT WORK IN PLACE OF ABOVE sequence
<xs:all>
<xs:element minOccurs="0" maxOccurs="unbounded" name="abc" type="Abc" />
<xs:element minOccurs="0" maxOccurs="unbounded" name="def" type="Def" />
<xs:element minOccurs="0" maxOccurs="unbounded" name="pqr" type="Pqr" />
</xs:all>
-->
<xs:attribute name="a" use="required" type="xs:string" />
<xs:attribute name="b" use="required" type="xs:string" />
<xs:attribute name="c" use="required" type="xs:string" />
</xs:complexType>
<xs:complexType name="Abc">
<!-- CORRET DEFINITON OF Abc is present here -->
</xs:complexType>
<xs:complexType name="Def">
<!-- CORRET DEFINITON OF Def is present here -->
</xs:complexType>
<xs:complexType name="Pqr">
<!-- CORRET DEFINITON OF Pqr is present here -->
</xs:complexType>

Answer 1

Replace below code in input POJO:
#XmlElement(name = "abc", namespace = "urn:x")
protected List<Abc> abc = null;
#XmlElement(name = "def", namespace = "urn:x")
protected List<Def> def = null;
#XmlElement(name = "pqr", namespace = "urn:x")
protected List<Pqr> pqr = null;
with:
protected List<Abc> abc = null;
protected List<Def> def = null;
protected List<Pqr> pqr = null;
and it works.