We're using Payara 4 which has Moxy as the default mapper.
I'm trying to understand how I can validate json on unmarshaling/marshaling, based on the JAXB annotations the object have.
To validate **XML** on unmarshaling need to create and use a schema.
I generated schema for **Person** class:
Generated schema for Person:
<?xml version="1.0" encoding="UTF-8"?>
// I removed the schema xmlns line as I cannot put in my first post links
<xsd:complexType name="person">
<xsd:sequence>
<xsd:element name="firstName" type="xsd:string" minOccurs="0"/>
<xsd:element name="lastName" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="Person" type="person"/>
</xsd:schema>
**Person.class:**
@XmlRootElement(name="Person")
public class Person {
private String firstName;
private String lastName;
@XmlElement(name = "firstName")
public String getFirstName()
{
return firstName;
}
public void setFirstName(String firstName)
{
this.firstName = firstName;
}
@XmlElement(name = "lastName", required = true)
public String getLastName()
{
return lastName;
}
public void setLastName(String lastName)
{
this.lastName = lastName;
}
}
The code for unmarshaling:
JAXBContext jc = JAXBContext.newInstance(Person.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
StreamSource personXml = new StreamSource("Person.xml");
SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = sf.newSchema(new File("src/main/java/jaxb/PersonSchema1.xsd"));
unmarshaller.setSchema(schema);
JAXBElement<Person> person = unmarshaller.unmarshal(personXml, Person.class);
This is working fine and will fail if Person.xml won't contain lastName attribute.
Now I'll change the code a little to unmarshal json:
JAXBContext jc = JAXBContext.newInstance(Person.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
StreamSource personXml = new StreamSource("Person.json");
SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = sf.newSchema(new File("src/main/java/jaxb/PersonSchema1.xsd"));
unmarshaller.setSchema(schema);
unmarshaller.setProperty(UnmarshallerProperties.JSON_INCLUDE_ROOT, false);
unmarshaller.setProperty(UnmarshallerProperties.MEDIA_TYPE, "application/json");
JAXBElement<Person> person = unmarshaller.unmarshal(personXml, Person.class);
In this case unmarshaling will fail on below exception even if Person.json has all the required attributes:
org.xml.sax.SAXParseException; cvc-elt.1: Cannot find the declaration of element ''.
Is it really the way to validate JSON?
Of course I would prefer to validate without any schema at all, but just to ask Moxy do the validation based on the annotations in Person.class
] 
Search
Help
Register
Login
Home
