public InputSource loadSource(String href, String context, XSLTC xsltc) {

        try {

            Source source = null;

            if (_uriResolver != null) {

                source = _uriResolver.resolve(href, context);

            }

            if (source == null && _catalogFiles != null &&

                    _xmlFeatures.getFeature(JdkXmlFeatures.XmlFeature.USE_CATALOG)) {

                if (_catalogUriResolver == null) {

                    _catalogUriResolver = CatalogManager.catalogResolver(_catalogFeatures);

                }

                source = _catalogUriResolver.resolve(href, context);

            }

            if (source != null) {

                return Util.getInputSource(xsltc, source);

            }

        }

        catch (TransformerException e) {

            // should catch it when the resolver explicitly throws the exception

            final ErrorMsg msg = new ErrorMsg(ErrorMsg.INVALID_URI_ERR, href + "

" + e.getMessage(), this);

            xsltc.getParser().reportError(Constants.FATAL, msg);

        }

        catch (CatalogException e) {

            final ErrorMsg msg = new ErrorMsg(ErrorMsg.CATALOG_EXCEPTION, href + "

" + e.getMessage(), this);

            xsltc.getParser().reportError(Constants.FATAL, msg);

        }



        return null;

    }