// errStart at this level at the next call to Transform. As long as
	// errStart > 0, chain will not consume any more source bytes.
	errStart int
}

func (c *chain) fatalError(errIndex int, err error) {
	if i := errIndex + 1; i > c.errStart {
		c.errStart = i
		c.err = err
	}
}

type link struct {
	t Transformer
	// b[p:n] holds the bytes to be transformed by t.

        }

        @Override
        public void error(SAXParseException e) throws SAXException {
            // Non-fatal error. No need to log.
        }

        @Override
        public void fatalError(SAXParseException e) throws SAXException {
            // Propagate error -- consistent with default behavior.
            throw e;
        }
    }

        @Override
        public void error(SAXParseException ex) {
            addError("xml parsing: " + getLocationString(ex) + ": " + ex.getMessage());
        }

        @Override
        public void fatalError(SAXParseException ex) {
            addError("[Fatal Error] " + getLocationString(ex) + ": " + ex.getMessage());
        }

        /** Returns a string of the location. */