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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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package javax.xml.bind.helpers;

import org.w3c.dom.Node;

import javax.xml.bind.ValidationEvent;

import javax.xml.bind.ValidationEventHandler;

import javax.xml.bind.ValidationEventLocator;

import java.net.URL;

/**

 * <p>

 * JAXB 1.0 only default validation event handler. This is the default

 * handler for all objects created from a JAXBContext that is managing

 * schema-derived code generated by a JAXB 1.0 binding compiler.

 *

 * <p>

 * This handler causes the unmarshal and validate operations to fail on the first

 * error or fatal error.

 *

 * <p>

 * This handler is not the default handler for JAXB mapped classes following

 * JAXB 2.0 or later versions. Default validation event handling has changed

 * and is specified in  {@link javax.xml.bind.Unmarshaller} and

 * {@link javax.xml.bind.Marshaller}.

 *

 * @author <ul><li>Ryan Shoemaker, Sun Microsystems, Inc.</li></ul>

 * @see javax.xml.bind.Unmarshaller

 * @see javax.xml.bind.Validator

 * @see javax.xml.bind.ValidationEventHandler

 * @since JAXB1.0

 */

public class DefaultValidationEventHandler implements ValidationEventHandler {

    public boolean handleEvent( ValidationEvent event ) {

        if( event == null ) {

            throw new IllegalArgumentException();

        }

        // calculate the severity prefix and return value

        String severity = null;

        boolean retVal = false;

        switch ( event.getSeverity() ) {

            case ValidationEvent.WARNING:

                severity = Messages.format( Messages.WARNING );

                retVal = true; // continue after warnings

                break;

            case ValidationEvent.ERROR:

                severity = Messages.format( Messages.ERROR );

                retVal = false; // terminate after errors

                break;

            case ValidationEvent.FATAL_ERROR:

                severity = Messages.format( Messages.FATAL_ERROR );

                retVal = false; // terminate after fatal errors

                break;

            default:

                assert false :

                    Messages.format( Messages.UNRECOGNIZED_SEVERITY,

                            event.getSeverity() );

        }

        // calculate the location message

        String location = getLocation( event );

        System.out.println(

            Messages.format( Messages.SEVERITY_MESSAGE,

                             severity,

                             event.getMessage(),

                             location ) );

        // fail on the first error or fatal error

        return retVal;

    }

    /**

     * Calculate a location message for the event

     *

     */

    private String getLocation(ValidationEvent event) {

        StringBuffer msg = new StringBuffer();

        ValidationEventLocator locator = event.getLocator();

        if( locator != null ) {

            URL url = locator.getURL();

            Object obj = locator.getObject();

            Node node = locator.getNode();

            int line = locator.getLineNumber();

            if( url!=null || line!=-1 ) {

                msg.append( "line " + line );

                if( url!=null )

                    msg.append( " of " + url );

            } else if( obj != null ) {

                msg.append( " obj: " + obj.toString() );

            } else if( node != null ) {

                msg.append( " node: " + node.toString() );

            }

        } else {

            msg.append( Messages.format( Messages.LOCATION_UNAVAILABLE ) );

        }

        return msg.toString();

    }

}