I had to do something in Java, and struggled to find the exact same thing out on the web. So I made my own set of functions using JAXB.
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import java.io.*;
import javax.xml.*;
import javax.xml.bind.*;
import javax.xml.validation.*;
import org.xml.sax.SAXException;
/**
* Generic Utilitarian Class
*
*/
public class GenericUtilities
{
/**
* Class for taking an XML file and converting it to define objects
*
* @param xmlFile - A valid XML file for pulling object definitions from
* @param schemaFile -
* @param type - The class of the object to convert the XML into
* @return - The instance of the defined class, constructed from the XML
* @throws JAXBException
* @throws FileNotFoundException
* @throws SAXException
*/
public static T DeserializeObjects(String xmlFile, String schemaFile, Class type) throws JAXBException, FileNotFoundException, SAXException
{
// Create a JAXB context passing in the class of the object we want to marshal/unmarshal
JAXBContext context = JAXBContext.newInstance(type);
// Create the unmarshaller to transform the XML back into an object
Unmarshaller unmarshaller = context.createUnmarshaller();
// Create a variable for the schema.
Schema xmlSchema = null;
if (schemaFile != null)
{
// Establish the schema factory for loading the schema
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
// Get a File object representation of the inputed schema
File sf = new File(schemaFile);
// Use the factory and file objects to instantiate an instance of the Schema object
xmlSchema = factory.newSchema(sf);
}
// Set schema validation. Null value turns validation off.
unmarshaller.setSchema(xmlSchema);
// Unmarshal the XML in the stringWriter back into an object
Object o = unmarshaller.unmarshal(new FileInputStream(xmlFile));
T entity = type.cast(o);
return entity;
}
/**
* Converts an instance object into a String containing the XML representation of that object.
*
* @param entity - The object to serialize into XML
* @return
* @throws JAXBException
*/
public static String SerializeObjects(T entity) throws JAXBException
{
// Create a JAXB context passing in the class of the object we want to marshal/unmarshal
JAXBContext context = JAXBContext.newInstance(entity.getClass());
// Create the marshaller, this will transform the object into XML
Marshaller marshaller = context.createMarshaller();
// Create a stringWriter to hold the XML
StringWriter stringWriter = new StringWriter();
// Marshal the javaObject and write the XML to the stringWriter
marshaller.marshal(entity, stringWriter);
return stringWriter.toString();
}
}
