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

      Matcher matcher = pattern.matcher(eventStr);
      if (! matcher.matches()) {
        continue;
      }
      MatchResult res = matcher.toMatchResult();
      for (int grp=1; grp <= res.groupCount(); grp++) {
        String value = res.group(grp);
        if (grp == SYSLOG_TIMESTAMP_POS) {
          timeStampString = value;


          // apply available format replacements to timestamp

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        MatchResult mr = matcher.toMatchResult();
      
        ESeq list;
        if (o2.capture_spec == am_all) {
          ESeq l = ERT.NIL;
          for (int i = mr.groupCount(); i >= 0; i--) {
            l = l.cons( capture (subject, mr, i, o2) );
          }
          
          result = result.cons(l);
        } else if ((list = o2.capture_spec.testSeq()) != null) {

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          return am_match;
        } 
        
        MatchResult mr = matcher.toMatchResult();
      
        int max = mr.groupCount();
        while( mr.start(max) == -1)
          max -= 1;
        
        ESeq il;
        if (o2.capture_spec == am_all) {

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            proxyAddr = null;
            int proxyPort = 8080;
            try {
                s.findInLine("(http://|)([^:/]+)(:|)([0-9]*)(/|)");
                MatchResult m = s.match();
                if (m.groupCount() >= 2) {
                    proxyAddr = m.group(2);
                }
                if ((m.groupCount() >= 4) && (!m.group(4).isEmpty())) {
                    proxyPort = Integer.parseInt(m.group(4));
                }

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                s.findInLine("(http://|)([^:/]+)(:|)([0-9]*)(/|)");
                MatchResult m = s.match();
                if (m.groupCount() >= 2) {
                    proxyAddr = m.group(2);
                }
                if ((m.groupCount() >= 4) && (!m.group(4).isEmpty())) {
                    proxyPort = Integer.parseInt(m.group(4));
                }
            } finally {
                s.close();
            }

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        res = scanner.match();
      } catch (IllegalStateException e) {
        // Ignore and move on ..
        continue;
      }
      for (int grp=1; grp <= res.groupCount(); grp++) {
        String value = res.group(grp);
        if (grp == SYSLOG_TIMESTAMP_POS) {
          // apply available format replacements to timestamp
          if (value != null) {
            for (int sp=0; sp < fmt.searchPattern.size(); sp++) {

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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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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        assertFalse(s.nextBoolean());
        try {
            s.nextBoolean();
            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        s.close();
        try {
            s.nextBoolean();
            fail("should throw IllegalStateException");
        } catch (IllegalStateException e) {

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        assertEquals(0, result.start());
        assertEquals(4, result.end());
        assertEquals(0, result.start(0));
        assertEquals(4, result.end(0));
        assertEquals("True", result.group());
        assertEquals(0, result.groupCount());
        
        s = new Scanner("True fase");
        assertTrue(s.nextBoolean());
        assertEquals(0, result.groupCount());
        try {

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