if (StringUtil.isBlank(pattern)) {
                return null;
            }
            final Matcher matcher = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE).matcher(value);
            final StringBuffer buf = new StringBuffer(value.length() + 100);
            while (matcher.find()) {

    private static final String PDF_DATE = "pdf_date";

    private static final Pattern EMAIL_ADDRESS_PATTERN =
            Pattern.compile("[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}", Pattern.CASE_INSENSITIVE);

    private static LoadingCache<String, Long> resourceHashCache =
            CacheBuilder.newBuilder().maximumSize(1000).expireAfterWrite(10, TimeUnit.MINUTES).build(new CacheLoader<String, Long>() {

 * resource. More specifically, two <code>SmbFile</code> objects are
 * equals if their server IP addresses are equal and the canonicalized
 * representation of their URLs, minus authentication parameters, are
 * case insensitivly and lexographically equal.
 * <p/>
 * For example, assuming the server <code>angus</code> resolves to the
 * <code>192.168.1.15</code> IP address, the below URLs would result in
 * <code>SmbFile</code>s that are equal.

     * equals if their server IP addresses are equal and the canonicalized
     * representation of their URLs, minus authentication parameters, are
     * case insensitively and lexographically equal.
     * <br>
     * For example, assuming the server <code>angus</code> resolves to the
     * <code>192.168.1.15</code> IP address, the below URLs would result in