Examples of java.util.regex.Pattern$GroupRef

java.util.regex.Pattern
Recursive reference to a group in the regular expression. It calls matchRef because if the reference fails to match we would not unset the group.

      return null;
    }
    String pre = "\\$\\{";
    String post = "\\}";
    String regex = pre+"(.*?)"+post;
    Pattern pattern = Pattern.compile(regex);


    Matcher matcher = pattern.matcher(value);


    while (matcher.find()) {
      String sysKey = matcher.group(1);
      String p = pre + sysKey + post;
      String v = sysKey.equalsIgnoreCase("user.appdata") ? System.getenv("appdata") : System.getProperty(sysKey,"UNKNOWN");

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    reader.close();
  }


  private SoftwareUpdateItem[] readSoftwareUpdateItems(BufferedReader reader, boolean onlyUpdates, boolean dragNdrop, PluginBaseInfo[] baseInfos) throws IOException {
    Pattern pluginTypePattern = Pattern.compile("\\[(.*):(.*)\\]");
    Pattern keyValuePattern = Pattern.compile("(.+?)=(.*)");
    Matcher matcher;


    ArrayList<SoftwareUpdateItem> updateItems = new ArrayList<SoftwareUpdateItem>();
    //ArrayList<PluginsSoftwareUpdateItem> blockedItems = new ArrayList<PluginsSoftwareUpdateItem>(0);


    try {
      SoftwareUpdateItem curItem=null;
      String line=reader.readLine();


      while (line != null) {
        matcher=pluginTypePattern.matcher(line);
        if (matcher.find()) { // new plugin
          String type=matcher.group(1);
          String className=matcher.group(2);


          if ("plugin".equals(type)) {
            curItem=new PluginSoftwareUpdateItem(className);
          }
          else if ("dataservice".equals(type)) {
            curItem=new DataServiceSoftwareUpdateItem(className);
          }
          else if ("tvbrowser".equals(type)) {
            curItem=new TvbrowserSoftwareUpdateItem(className);
          }


          if (curItem==null) {
            throw new IOException("invalid software update file");
          }


          updateItems.add(curItem);
        }
        else {
          matcher=keyValuePattern.matcher(line);


          if (matcher.find()) { // new plugin
            String value = matcher.group(2);
            value = value.replaceAll("\\\\", ""); // fix wrong HTML encoding in plugin descriptions

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      flags |= Pattern.CASE_INSENSITIVE;
      flags |= Pattern.UNICODE_CASE;
    }


    // Compile the regular expression
    Pattern pattern;
    try {
      pattern = Pattern.compile(regex, flags);
    }
    catch (PatternSyntaxException exc) {
      throw new TvBrowserException(RegexSearcher.class, "error.1",

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      } catch (TvBrowserException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      if (searcher instanceof RegexSearcher) {
        Pattern pattern = ((RegexSearcher) searcher).getPattern();
        if (pattern != null) {
          if (pattern.pattern().startsWith(".*")) {
            pattern = Pattern.compile(pattern.pattern().substring(2));
          }
          if (pattern.pattern().endsWith(".*")) {
            pattern = Pattern.compile(pattern.pattern().substring(0,
                pattern.pattern().length() - 2));
          }
          for (HTMLDocument.Iterator it = document
              .getIterator(HTML.Tag.CONTENT); it.isValid(); it.next()) {
            try {
              String fragment = document.getText(it.getStartOffset(), it
                  .getEndOffset()
                  - it.getStartOffset());
              Matcher matcher = pattern.matcher(fragment);
              while (matcher.find()) {
                highlighter.addHighlight(it.getStartOffset() + matcher.start(),
                    it.getStartOffset() + matcher.end(), painter);
              }
            } catch (BadLocationException ex) {

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    /**
     * Method for validating event strings against event string specifications, where a
     * specification is a regular expression involving event symbols. e.g. [b]([sgv])[u]
     */
    protected static boolean validateEventString(String eventString, String spec) {
        Pattern pattern = null;
        Matcher matcher = null;


        // set up the regular expression specification
        pattern = Pattern.compile(spec);
        // set up the actual event string
        matcher = pattern.matcher(eventString);


        // check if the actual string satisfies the specification
        if (matcher.find()) {
            // a match has been found, but we need to check that the whole event string
            // matches, and not just a substring

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  protected Map getBeanProperties(Object bean) {
    HashMap values = new HashMap();
    if (bean == null) return values;
    Method[] m = bean.getClass().getMethods();
    
    Pattern p = Pattern.compile("get([A-Z]\\w+)");
    
    for (int i = 0; i < m.length; i++) {
      if (m[i].getName().equals("getClass")) continue;
      if (m[i].getParameterTypes().length > 0) continue;
      Matcher r = p.matcher(m[i].getName());
      if (r.matches()) {
        try {
          values.put(r.group(1).toLowerCase(), m[i].invoke(bean, new Object[0]));
        } catch (IllegalArgumentException e) {
          throw e;

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    // javascript:loadOrAlert('WVOPRHRPFSCLAW7UWHCXCH7QNQIU6TWG')


    // accept raw hash of 32 base-32 chars, with garbage around it
    if (accept_magnets && guess) {
      Pattern pattern = Pattern.compile("[^a-zA-Z2-7][a-zA-Z2-7]{32}[^a-zA-Z2-7]");
      Matcher matcher = pattern.matcher(text);
      if (matcher.find()) {
        String hash = text.substring(matcher.start() + 1, matcher.start() + 33);
        return "magnet:?xt=urn:btih:" + hash;
      }


      pattern = Pattern.compile("[^a-fA-F0-9][a-fA-F0-9]{40}[^a-fA-F0-9]");
      matcher = pattern.matcher(text);
      if (matcher.find()) {
        String hash = text.substring(matcher.start() + 1, matcher.start() + 41);
        // convert from HEX to raw bytes
        byte[] infohash = ByteFormatter.decodeString(hash.toUpperCase());
        // convert to BASE32

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    // accept raw hash of 32 base-32 chars
    if (text.matches("^[a-zA-Z2-7]{32}$")) {
      return "magnet:?xt=urn:btih:" + text;
    }
    
    Pattern pattern;
    Matcher matcher;


    pattern = Pattern.compile("bc://bt/([a-z0-9=\\+/]+)", Pattern.CASE_INSENSITIVE);
    matcher = pattern.matcher(text.replaceAll(" ", "+"));
    if (matcher.find()) {
      String base64 = matcher.group(1);
      byte[] decode = Base64.decode(base64);
      if (decode != null && decode.length > 0) {
        // Format is AA/<name>/<size>/<hash>/ZZ
        try {
          String decodeString = new String(decode, "utf8");
          pattern = Pattern.compile("AA.*/(.*)/ZZ", Pattern.CASE_INSENSITIVE);
          matcher = pattern.matcher(decodeString);
          if (matcher.find()) {
            String hash = matcher.group(1);
            String magnet = parseTextForMagnets(hash);
            if (magnet != null) {
              pattern = Pattern.compile("AA/(.*)/[0-9]+", Pattern.CASE_INSENSITIVE);
              matcher = pattern.matcher(decodeString);
              if (matcher.find()) {
                String name = matcher.group(1);
                return magnet + "&dn=" + encode(name);
              }
              return magnet;
            }
          }
        } catch (UnsupportedEncodingException e) {
        }
      }
    }


    pattern = Pattern.compile("bctp://task/(.*)", Pattern.CASE_INSENSITIVE);
    matcher = pattern.matcher(text);
    if (matcher.find()) {
      // Format is <name>/<size>/<hash>
      String decodeString = matcher.group(1);
      String magnet = parseTextForMagnets(decodeString);
      if (magnet != null) {
        pattern = Pattern.compile("(.*)/[0-9]+", Pattern.CASE_INSENSITIVE);
        matcher = pattern.matcher(decodeString);
        if (matcher.find()) {
          String name = matcher.group(1);
          return magnet + "&dn=" + encode(name);
        }
        return magnet;
      }
    }


    // accept raw hash of 32 base-32 chars, with garbage around it
    if (true) {
      text = "!" + text + "!";
      pattern = Pattern.compile("[^a-zA-Z2-7][a-zA-Z2-7]{32}[^a-zA-Z2-7]");
      matcher = pattern.matcher(text);
      if (matcher.find()) {
        String hash = text.substring(matcher.start() + 1, matcher.start() + 33);
        return "magnet:?xt=urn:btih:" + hash;
      }


      pattern = Pattern.compile("[^a-fA-F0-9][a-fA-F0-9]{40}[^a-fA-F0-9]");
      matcher = pattern.matcher(text);
      if (matcher.find()) {
        String hash = text.substring(matcher.start() + 1, matcher.start() + 41);
        // convert from HEX to raw bytes
        byte[] infohash = ByteFormatter.decodeString(hash.toUpperCase());
        // convert to BASE32

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        while (thisIndexIterator.hasNext()) {
          int currentIndex = ((Integer) thisIndexIterator.next()).intValue();
          String fieldValue = String.valueOf(rowData.get(currentIndex - 1));


          if (fieldValue != null) {
            Pattern pattern = Pattern.compile("[^a-zA-z_0-9 ]");
            Matcher fieldMatch = pattern.matcher(fieldValue);
            fieldValue = fieldMatch.replaceAll("");
            // fieldValue = fieldValue.replaceAll("'","");
          }


          if (fieldValue == null || fieldValue.equals("null")) {

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          }
        }


        String s = bRegexSearch ? tmpSearch : "\\Q"
            + tmpSearch.replaceAll("[|;]", "\\\\E|\\\\Q") + "\\E";
        Pattern pattern = Pattern.compile(s, Pattern.CASE_INSENSITIVE);


        if (!pattern.matcher(name).find())
          bOurs = false;
      } catch (Exception e) {
        // Future: report PatternSyntaxException message to user.
      }
    }

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