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package com.sun.xml.bind;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.ValidationEventLocator;
import javax.xml.bind.helpers.ValidationEventImpl;
import com.sun.xml.bind.validator.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* An ErrorHandler that accepts a SAXParseException from the ValidatingUnmarshaller,
* creates a ValidationEvent, and passes it onto the client app's ValidationEventHandler.
*
* @see com.sun.xml.bind.v2.runtime.ValidatingUnmarshaller
* @since 1.0
*/
public class ErrorHandlerToEventHandler implements org.xml.sax.ErrorHandler {
/** the client event handler that will receive the validation events */
private ValidationEventHandler veh = null;
/** the locator object responsible for filling in the validation event
* location info **/
private Locator locator = null;
public ErrorHandlerToEventHandler( ValidationEventHandler handler,
Locator locator ) {
veh = handler;
this.locator = locator;
}
public void error(SAXParseException exception)
throws SAXException {
propagateEvent( ValidationEvent.ERROR, exception );
}
public void warning(SAXParseException exception)
throws SAXException {
propagateEvent( ValidationEvent.WARNING, exception );
}
public void fatalError(SAXParseException exception)
throws SAXException {
propagateEvent( ValidationEvent.FATAL_ERROR, exception );
}
private void propagateEvent( int severity, SAXParseException saxException )
throws SAXException {
// get location info:
// sax locators simply use the location info embedded in the
// sax exception, dom locators keep a reference to their DOMScanner
// and call back to figure out where the error occurred.
ValidationEventLocator vel =
locator.getLocation( saxException );
ValidationEventImpl ve =
new ValidationEventImpl( severity, saxException.getMessage(), vel );
Exception e = saxException.getException();
if( e != null ) {
ve.setLinkedException( e );
} else {
ve.setLinkedException( saxException );
}
// call the client's event handler. If it returns false, then bail-out
// and terminate the unmarshal operation.
boolean result;
try {
result = veh.handleEvent( ve );
} catch( RuntimeException re ) {
// if the client's event handler causes a RuntimeException, then
// we have to return false.
result = false;
}
if( ! result ) {
// bail-out of the parse with a SAX exception, but convert it into
// an UnmarshalException back in in the AbstractUnmarshaller
throw saxException;
}
}
}