protected Pattern xmlTagPattern = Pattern.compile("<[^>]+>");

    @Override
    protected Pattern getEncodingPattern() {
        return xmlEncodingPattern;
    }

    @Override
    protected Pattern getTagPattern() {
        return xmlTagPattern;
    }

    public Pattern getXmlEncodingPattern() {
        return xmlEncodingPattern;
    }

    public void setXmlEncodingPattern(final Pattern metaCharsetPattern) {

    protected int preloadSizeForCharset = 2048;

    protected boolean ignoreCommentTag = false;

    protected abstract Pattern getEncodingPattern();

    protected abstract Pattern getTagPattern();

    @Override
    public ExtractData getText(final InputStream in, final Map<String, String> params) {
        if (in == null) {
            throw new CrawlerSystemException("The inputstream is null.");
        }

        return metaCharsetPattern;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.extractor.impl.AbstractXmlExtractor#getTagPattern()
     */
    @Override
    protected Pattern getTagPattern() {
        return htmlTagPattern;
    }

    public Pattern getMetaCharsetPattern() {
        return metaCharsetPattern;
    }

        return metaCharsetPattern;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.extractor.impl.AbstractXmlExtractor#getTagPattern()
     */
    @Override
    protected Pattern getTagPattern() {
        // not used
        return null;
    }

    public void addFeature(final String key, final String value) {