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

java.util.regex.MatchResult.groupCount()
Returns the number of capturing groups in this match result'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

        && !scanner.hasNext("--" + boundary + REG_EX_ZERO_OR_MORE_WHITESPACES)) {
      if (scanner.hasNext(REG_EX_HEADER)) {
        scanner.next(REG_EX_HEADER);
        currentLineNumber++;
        MatchResult result = scanner.match();
        if (result.groupCount() == 2) {
          String headerName = result.group(1).trim().toLowerCase(Locale.ENGLISH);
          String headerValue = result.group(2).trim();
          if (HttpHeaders.ACCEPT.equalsIgnoreCase(headerName)) {
            List<String> acceptHeaders = parseAcceptHeaders(headerValue);
            headers.put(headerName, acceptHeaders);

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      if (uriObject.isAbsolute()) {
        Pattern regexRequestUri = Pattern.compile(baseUri + "/([^/][^?]*)(\\?.*)?");
        if (uriScanner.hasNext(regexRequestUri)) {
          uriScanner.next(regexRequestUri);
          MatchResult result = uriScanner.match();
          if (result.groupCount() == 2) {
            odataPathSegmentsAsString = result.group(1);
            queryParametersAsString = result.group(2) != null ? result.group(2) : "";
          } else {
            uriScanner.close();
            throw new BatchException(BatchException.INVALID_URI.addContent(currentLineNumber));

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      } else {
        Pattern regexRequestUri = Pattern.compile("([^/][^?]*)(\\?.*)?");
        if (uriScanner.hasNext(regexRequestUri)) {
          uriScanner.next(regexRequestUri);
          MatchResult result = uriScanner.match();
          if (result.groupCount() == 2) {
            odataPathSegmentsAsString = result.group(1);
            queryParametersAsString = result.group(2) != null ? result.group(2) : "";
          } else {
            uriScanner.close();
            throw new BatchException(BatchException.INVALID_URI.addContent(currentLineNumber));

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    Map<String, String> queryParametersMap = new HashMap<String, String>();
    Pattern regex = Pattern.compile("(?:" + baseUri + "/)?" + "[^?]+" + "\\?(.*)");
    if (uriScanner.hasNext(regex)) {
      uriScanner.next(regex);
      MatchResult uriResult = uriScanner.match();
      if (uriResult.groupCount() == 1) {
        String queryParams = uriResult.group(1);
        Scanner queryParamsScanner = new Scanner(queryParams);
        queryParamsScanner.useDelimiter("&");
        while (queryParamsScanner.hasNext(REG_EX_QUERY_PARAMETER)) {
          queryParamsScanner.next(REG_EX_QUERY_PARAMETER);

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        Scanner queryParamsScanner = new Scanner(queryParams);
        queryParamsScanner.useDelimiter("&");
        while (queryParamsScanner.hasNext(REG_EX_QUERY_PARAMETER)) {
          queryParamsScanner.next(REG_EX_QUERY_PARAMETER);
          MatchResult result = queryParamsScanner.match();
          if (result.groupCount() == 2) {
            String systemQueryOption = result.group(1);
            String value = result.group(2);
            queryParametersMap.put(systemQueryOption, Decoder.decode(value));
          } else {
            queryParamsScanner.close();

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    }
    if (contentTypeScanner.hasNext(REG_EX_BOUNDARY_PARAMETER)) {
      contentTypeScanner.next(REG_EX_BOUNDARY_PARAMETER);
      MatchResult result = contentTypeScanner.match();
      contentTypeScanner.close();
      if (result.groupCount() == 1 && result.group(1).trim().matches(REG_EX_BOUNDARY)) {
        return trimQuota(result.group(1).trim());
      } else {
        throw new BatchException(BatchException.INVALID_BOUNDARY);
      }
    } else {

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    while (scanner.hasNext() && !(scanner.hasNext(REG_EX_BLANK_LINE))) {
      if (scanner.hasNext(REG_EX_HEADER)) {
        scanner.next(REG_EX_HEADER);
        currentLineNumber++;
        MatchResult result = scanner.match();
        if (result.groupCount() == 2) {
          String headerName = result.group(1).trim().toLowerCase(Locale.ENGLISH);
          String headerValue = result.group(2).trim();
          headers.put(headerName, headerValue);
        }
      } else {

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    // Scanner s2 = new Scanner(input);
    Scanner s2 = new Scanner (input);
    s2.findInLine ("(\\d+) fish (\\d+) fish (\\w+) fish (\\w+)");
    MatchResult mResult = s2.match ();
    for (i = 1; i <= mResult.groupCount (); i++)
      {
  this.myHarness.check (mResult.group (i), values[i],
            "wrong result : \"" + mResult.group (i) +
            "\" != \"" + values[i] + "\"");
  // System.out.println(mResult.group(i));

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        final MatchResult mr = matchResults.peek();
        if (mr == null) {
            return null;
        }


        String finalGroup = mr.group(mr.groupCount());
        // We have found a match but the right hand path pattern did not match anything
        // so just returning an empty string as a final matching group result.
        // Otherwise a non-empty patterns would fail to match the right-hand-path properly.
        // See also PatternWithGroups.match(CharSequence) implementation.
        return finalGroup == null ? "" : finalGroup;

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        assertEquals(3, result.end());
        assertEquals(2, result.start(0));
        assertEquals(3, result.end(0));
        assertEquals("2", result.group());
        assertEquals("2", result.group(0));
        assertEquals(0, result.groupCount());
        try {
            result.start(1);
            fail("should throw IndexOutOfBoundsException");
        } catch (IndexOutOfBoundsException e) {
            // Expected

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