Examples of java.util.regex.Matcher.groupCount()

java.util.regex.Matcher.groupCount()
Returns the number of capturing groups in this matcher's pattern.
Group zero denotes the entire pattern by convention. It is not included in this count.
Any non-negative integer smaller than or equal to the value returned by this method is guaranteed to be a valid group index for this matcher.
@return The number of capturing groups in this matcher's pattern

    Matcher m = inputPattern.matcher(new String(payload));
    if (!m.matches()) {
      return Lists.newArrayList();
    }
    
    if (m.groupCount() != colNames.size()) {
      return Lists.newArrayList();
    }
    
    try {
      rowKey = getRowKey();

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  {
    if (null == durationStr) return 0;
    TimeUnit unit = defaultUnit;
    Matcher m = DURATION_PATTERN.matcher(durationStr);
    if (!m.matches()) throw new InvalidConfigException("invalid duration string: " + durationStr);
    if (1 < m.groupCount() && null != m.group(2) && 0 < m.group(2).length())
    {
      char unitChar1 = m.group(2).charAt(0);
      switch (unitChar1)
      {
      case 'n':

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  {
    if (null == sizeString) return 0;
    long unit = 1L;
    Matcher m = BYTE_SIZE_PATTERN.matcher(sizeString);
    if (!m.matches()) throw new InvalidConfigException("invalid byte-size string: " + sizeString);
    if (1 < m.groupCount() && null != m.group(2) && 0 < m.group(2).length())
    {
      char unitChar1 = m.group(2).charAt(0);
      switch (unitChar1)
      {
      case 'k': unit = 1000L; break;

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        for (Pattern pathPattern : pathPatterns) {
            Matcher matcher = pathPattern.matcher(path);
            if (matcher.find()) {
                // assuming that first group is tenantId in the path, we can
                // make group number configurable.
                if (matcher.groupCount() >= 1) {
                    String tenantId = matcher.group(1);
                    final Tenant tenant = this.tenantProvider.getTenant(tenantId);
                    if (tenant != null) {
                        return tenant;
                    }

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                                          // get the pieces,
        } else {
          // Extract the relevant pieces and write to a file in the output dir
          Matcher matcher = EXTRACTION_PATTERN.matcher(buffer);
          while (matcher.find()) {
            for (int i = 1; i <= matcher.groupCount(); i++) {
              if (matcher.group(i) != null) {
                outBuffer.append(matcher.group(i));
              }
            }
            outBuffer.append(LINE_SEPARATOR).append(LINE_SEPARATOR);

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     * @return the action
     */
    public static String extractActionFromContentType(String contentType) {
        if (contentType != null) {
            Matcher matcher = ACTION_PATTERN.matcher(contentType);
            if (matcher.find() && matcher.groupCount() == 1) {
                return matcher.group(1).trim();
            }
        }
        return TransportConstants.EMPTY_SOAP_ACTION;
    }

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     */
    public static String setActionInContentType(String contentType, String action) {
        Assert.hasLength(contentType, "'contentType' must not be empty");
        if (StringUtils.hasText(action)) {
            Matcher matcher = ACTION_PATTERN.matcher(contentType);
            if (matcher.find() && matcher.groupCount() == 1) {
                StringBuffer buffer = new StringBuffer();
                matcher.appendReplacement(buffer, "action=" + action);
                matcher.appendTail(buffer);
                return buffer.toString();
            }

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            _minorVersion = 0;
            _buildNumber = 0;
            try {
                Matcher matcher = SUN_JAVA_VERSION.matcher(version);
                if (matcher.matches()) {
                    int groups = matcher.groupCount();
                    _majorVersion = Double.parseDouble(matcher.group(1));
                    if (groups >= 3 && matcher.group(3) != null) {
                        _minorVersion = Integer.parseInt(matcher.group(3));
                    }
                    if (groups >= 5 && matcher.group(5) != null) {

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            }
            catch (NumberFormatException e) {
                try {
                    Matcher matcher = SUN_JAVA_VERSION_SIMPLE.matcher(version);
                    if (matcher.matches()) {
                        int groups = matcher.groupCount();
                        _majorVersion = Double.parseDouble(matcher.group(1));
                        if (groups >= 3 && matcher.group(3) != null) {
                            _minorVersion = Integer.parseInt(matcher.group(3));
                        }
                    }

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        Matcher matcher = VERSION_PATTERN.matcher(version);
        if(matcher.matches()) {
            this.major = Integer.parseInt(matcher.group(1));
            this.minor = Integer.parseInt(matcher.group(2));
            this.revision = Integer.parseInt(matcher.group(3));
            if(matcher.groupCount() > 3) {
                this.extra = matcher.group(4);
            }
            else {
                this.extra = null;
            }

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