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import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.UnmarshalException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.ValidationEventLocator;
import static javax.xml.XMLConstants.W3C_XML_SCHEMA_NS_URI;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Schema;
// import java content classes generated by binding compiler
import primer.po.*;
/*
* $Id: Main.java,v 1.2 2009-11-11 14:17:31 pavel_bucek Exp $
*/
public class Main {
// This sample application demonstrates how to enable validation during
// the unmarshal operations.
public static void main( String[] args ) {
try {
// create a JAXBContext capable of handling classes generated into
// the primer.po package
JAXBContext jc = JAXBContext.newInstance( "primer.po" );
// create an Unmarshaller
Unmarshaller u = jc.createUnmarshaller();
SchemaFactory sf = SchemaFactory.newInstance(W3C_XML_SCHEMA_NS_URI);
try {
Schema schema = sf.newSchema(new File("po.xsd"));
u.setSchema(schema);
u.setEventHandler(
new ValidationEventHandler() {
// allow unmarshalling to continue even if there are errors
public boolean handleEvent(ValidationEvent ve) {
// ignore warnings
if (ve.getSeverity() != ValidationEvent.WARNING) {
ValidationEventLocator vel = ve.getLocator();
System.out.println("Line:Col[" + vel.getLineNumber() +
":" + vel.getColumnNumber() +
"]:" + ve.getMessage());
}
return true;
}
}
);
} catch (org.xml.sax.SAXException se) {
System.out.println("Unable to validate due to following error.");
se.printStackTrace();
}
// unmarshal an invalid po instance document into a tree of Java
// content objects composed of classes from the primer.po package.
System.out.println("NOTE: This sample is working correctly if you see validation errors!!");
Object poe =
u.unmarshal( new File( "po.xml" ) );
// even though document was determined to be invalid unmarshalling,
// marshal out result.
System.out.println("");
System.out.println("Still able to marshal invalid document");
Marshaller m = jc.createMarshaller();
m.setProperty( Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE );
m.marshal(poe, System.out);
} catch( UnmarshalException ue ) {
// The JAXB specification does not mandate how the JAXB provider
// must behave when attempting to unmarshal invalid XML data. In
// those cases, the JAXB provider is allowed to terminate the
// call to unmarshal with an UnmarshalException.
System.out.println( "Caught UnmarshalException" );
} catch( JAXBException je ) {
je.printStackTrace();
}
}
}