Two Question [JAXB and JAX-WS]

[Khaled Mahmoud]

Hi,

I got two questions, one about JAXB and one about JAX-WS .

The first one which is about JAXB. When unmarshelling objects using the [unmarshaller] that is obtained from the JAXB context, there is an option to do validation, that is if the data correspond to the constraint declared in the XML schema.

    

JAXBContext context = JAXBContext.newInstance("org.acme.foo:org.acme.bar");
Unmarshaller unmarshaller = context.createUnmarshaller();
MyObject o = (MyObject)unmarshaller.unmarshal(new File("foo.xml"));
Validator v = context.createValidator();
v.validate(o);

The question is, how does the JAXB API know to wich XML Shcema file (xsd) to look. Let's say we have three XSD file, and more over there might be DTD files as well.

The second Question : Is there any comprehensive simple tutorial, set of articles covering JAX-WS inluding Communication models, Dispatches ... etc

Thanks in advance.

[Ivan Krizsan]

Hi!
The following code snippet shows how perform validation when using JAXB to unmarshall XML data:

        /* 
         * Create a JAXB context whose context path is com.ivan.beans, 
         * the package in which the classes generated from the XML 
         * schema are contained. 
         */ 
        JAXBContext theJAXBContext = JAXBContext.newInstance("com.ivan.beans"); 
        /* Create the object responsible for unmarshaling XML document(s). */ 
        Unmarshaller theUnmarshaller = theJAXBContext.createUnmarshaller(); 

        /* 
         * Validate the XML document against its schema, as part of 
         * the unmarshaling operation. 
         * Having set a schema for the unmarshaller, an exception will 
         * be thrown if the XML document does not pass validation. 
         */ 
        SchemaFactory theSchemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); 
        Schema theKompisSchema = theSchemaFactory.newSchema(new File(KOMPISAR_XML_SCHEMA_FILE_NAME)); 
        theUnmarshaller.setSchema(theKompisSchema); 

        /* Unmarshal the XML document. */
        JAXBElement<KompisRelation> theJAXBKR = (JAXBElement<KompisRelation>)theUnmarshaller.unmarshal(new File( KOMPISAR_XML_FILE_NAME)); 

        /* Retrieve the content model for the JAXB element. */ 
        KompisRelation theKR = theJAXBKR.getValue();

Best wishes!