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POJAXB Eclipse Link Moxy: ClassCastException while Unmarshalling JSON using schema validation
 

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    <p>I am using eclipse link(v2.5.1) Dynamic JAXB to convert XML to JSON and viceversa using a multiple schemas. While umarshalling the JSON to XML,I want to validate the JSON(against the XSD) and Dynamic Moxy is unable to validate the generated JSON and results in classcast exception.</p> <p>emp.xsd</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:emp="Employee:2:0" targetNamespace="Employee:2:0" elementFormDefault="unqualified" attributeFormDefault="unqualified" version="2.0"&gt; &lt;xsd:element name="searchManager" type="emp:SearchManager" /&gt; &lt;xsd:complexType name="SearchManager"&gt; &lt;xsd:sequence&gt; &lt;xsd:element name="CompanyName" type="xsd:string" /&gt; &lt;xsd:element name="objects" type="emp:Employee" minOccurs="0" maxOccurs="unbounded" /&gt; &lt;/xsd:sequence&gt; &lt;/xsd:complexType&gt; &lt;xsd:complexType name="Employee"&gt; &lt;xsd:complexContent&gt; &lt;xsd:extension base="emp:Organization"&gt; &lt;xsd:sequence&gt; &lt;xsd:element name="EmpId" type="xsd:string" minOccurs="0" /&gt; &lt;/xsd:sequence&gt; &lt;/xsd:extension&gt; &lt;/xsd:complexContent&gt; &lt;/xsd:complexType&gt; &lt;xsd:complexType name="Projects"&gt; &lt;xsd:complexContent&gt; &lt;xsd:extension base="emp:Organization"/&gt; &lt;/xsd:complexContent&gt; &lt;/xsd:complexType&gt; &lt;xsd:complexType name="Organization"&gt; &lt;xsd:annotation&gt; &lt;xsd:documentation&gt;Abstract base class &lt;/xsd:documentation&gt; &lt;/xsd:annotation&gt; &lt;/xsd:complexType&gt; &lt;/xsd:schema&gt; </code></pre> <p>Manager.xsd</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;xs:schema targetNamespace="Manager:1:0" xmlns:emp="Employee:2:0" xmlns:manager="Manager:1:0" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified" attributeFormDefault="unqualified" version="1.0"&gt; &lt;!-- schema imports --&gt; &lt;xs:import namespace="Employee:2:0" schemaLocation="emp.xsd" /&gt; &lt;xs:complexType name="Manager"&gt; &lt;xs:annotation&gt; &lt;xs:documentation&gt; Definition of class Employee &lt;/xs:documentation&gt; &lt;/xs:annotation&gt; &lt;xs:complexContent&gt; &lt;xs:extension base="emp:Employee"&gt; &lt;xs:sequence&gt; &lt;xs:element name="teamSize" type="xsd:int" minOccurs="0" /&gt; &lt;xs:element name="project1" type="manager:Project1" minOccurs="0" maxOccurs="unbounded" /&gt; &lt;/xs:sequence&gt; &lt;/xs:extension&gt; &lt;/xs:complexContent&gt; &lt;/xs:complexType&gt; &lt;xs:complexType name="Project1"&gt; &lt;xs:complexContent&gt; &lt;xs:extension base="manager:Developement"&gt; &lt;xs:sequence&gt; &lt;xs:element name="type" type="xsd:int" minOccurs="0" /&gt; &lt;/xs:sequence&gt; &lt;/xs:extension&gt; &lt;/xs:complexContent&gt; &lt;/xs:complexType&gt; &lt;xs:complexType name="Developement"&gt; &lt;xs:annotation&gt; &lt;xs:documentation&gt; Abstract base class for an Development &lt;/xs:documentation&gt; &lt;/xs:annotation&gt; &lt;xs:complexContent&gt; &lt;xs:extension base="emp:Projects"/&gt; &lt;/xs:complexContent&gt; &lt;/xs:complexType&gt; &lt;/xs:schema&gt; </code></pre> <p>sample.xml</p> <pre><code>&lt;emp:searchManager xmlns:emp="Employee:2:0" xmlns:manager="Manager:1:0"&gt; &lt;CompanyName&gt;Test&lt;/CompanyName&gt; &lt;objects xmlns:ns2="Manager:1:0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns2:Manager"&gt; &lt;EmpId&gt;123456&lt;/EmpId&gt; &lt;teamSize&gt;10&lt;/teamSize&gt; &lt;project1&gt; &lt;type&gt;1&lt;/type&gt; &lt;/project1&gt; &lt;/objects&gt; &lt;/emp:searchManager&gt; </code></pre> <p>The driver program to test is as follows</p> <pre><code>public class XMLToJSON { /** * @param args */ public static void main(String[] args) { FileInputStream xsdInputStream; try { xsdInputStream = new FileInputStream("Manager.xsd"); DynamicJAXBContext jaxbContext = DynamicJAXBContextFactory.createContextFromXSD(xsdInputStream, new MyEntityResolver(), null, null); FileInputStream xmlInputStream = new FileInputStream("sample.xml"); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); JAXBElement&lt;DynamicEntity&gt; manager = (JAXBElement) unmarshaller.unmarshal(xmlInputStream); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); //input xml to print marshaller.marshal(manager, System.out); Map namespaces = new HashMap(); namespaces.put("http://www.w3.org/2001/XMLSchema-instance", "xsi"); namespaces.put("Employee:2:0", "ns1"); namespaces.put("Manager:1:0", "ns2"); // XML to JSON marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.setProperty(MarshallerProperties.MEDIA_TYPE, "application/json"); marshaller.setProperty(MarshallerProperties.NAMESPACE_PREFIX_MAPPER, namespaces); FileOutputStream jsonOutputStream = new FileOutputStream("sample.json"); marshaller.marshal(manager, jsonOutputStream); marshaller.marshal(manager, System.out); //JSON to XML JAXBUnmarshaller jsonUnmarshaller = jaxbContext.createUnmarshaller(); jsonUnmarshaller.setProperty(UnmarshallerProperties.MEDIA_TYPE, "application/json"); jsonUnmarshaller.setProperty(UnmarshallerProperties.JSON_NAMESPACE_PREFIX_MAPPER, namespaces); jsonUnmarshaller.setProperty(UnmarshallerProperties.JSON_INCLUDE_ROOT, true); jsonUnmarshaller.setProperty(UnmarshallerProperties.JSON_ATTRIBUTE_PREFIX, "@"); SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = sf.newSchema(new File("Manager.xsd")); jsonUnmarshaller.setSchema(schema); StreamSource json = new StreamSource("sample.json"); JAXBElement&lt;DynamicEntity&gt; myroot = (JAXBElement) jsonUnmarshaller.unmarshal(json); Marshaller m = jaxbContext.createMarshaller(); m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,true); m.marshal(myroot, System.out); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (JAXBException e) { e.printStackTrace(); } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } </code></pre> <p>Generated Sample JSON</p> <pre><code> { "ns1.searchManager" : { "CompanyName" : "Test", "objects" : [ { "xsi.type" : "ns2.Manager", "EmpId" : "123456", "teamSize" : 10, "project1" : [ { "type" : 1 } ] } ] } } </code></pre> <p>While unmarshalling the below exception was seen</p> <pre><code>Exception in thread "main" java.lang.ClassCastException: org.eclipse.persistence.internal.oxm.record.XMLReaderAdapter$ExtendedContentHandlerAdapter cannot be cast to org.eclipse.persistence.internal.oxm.record.UnmarshalRecord at org.eclipse.persistence.internal.oxm.record.json.JSONReader.isTextValue(JSONReader.java:454) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:350) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:244) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:430) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:299) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parseRoot(JSONReader.java:166) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:125) at org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:140) at org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:778) at org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:666) at org.eclipse.persistence.oxm.XMLUnmarshaller.unmarshal(XMLUnmarshaller.java:593) at org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:287) at XMLToJSON.main(XMLToJSON.java:74) </code></pre> <p>EDIT:Corrected the generated sample json</p> <p>Question</p> <p>The intention is to check whether JSON conforms to the XML schema. Does Dynamic JAXB support JSON Validation while unmarshalling? Is this a bug in Dynamic JAXB Moxy?</p>
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