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

        if (!m.matches()) {
            throw new BadSpecial(SqltoolRB.pl_malformat.getString());
            // I think it's impossible to get here, since the pattern is
            // so liberal.
        }
        if (m.groupCount() < 1 || m.group(1) == null) {
            plMode = true;
            stdprintln(SqltoolRB.pl_expansionmode.getString("on"));
            return;
        }

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        m = varsetPattern.matcher(dereference(string, false));
        if (!m.matches()) {
            throw new BadSpecial(SqltoolRB.pl_unknown.getString(tokens[0]));
        }
        if (m.groupCount() < 2 || m.groupCount() > 3) {
            // Assertion
            throw new RuntimeException("varset pattern matched but captured "
                    + m.groupCount() + " groups");
        }

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        m = varsetPattern.matcher(dereference(string, false));
        if (!m.matches()) {
            throw new BadSpecial(SqltoolRB.pl_unknown.getString(tokens[0]));
        }
        if (m.groupCount() < 2 || m.groupCount() > 3) {
            // Assertion
            throw new RuntimeException("varset pattern matched but captured "
                    + m.groupCount() + " groups");
        }

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            throw new BadSpecial(SqltoolRB.pl_unknown.getString(tokens[0]));
        }
        if (m.groupCount() < 2 || m.groupCount() > 3) {
            // Assertion
            throw new RuntimeException("varset pattern matched but captured "
                    + m.groupCount() + " groups");
        }


        String varName  = m.group(1);


        if (varName.indexOf(':') > -1) {

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        switch (m.group(2).charAt(0)) {
            case '_' :
                silentFetch = true;
            case '~' :
                if (m.groupCount() > 2 && m.group(3) != null) {
                    throw new BadSpecial(SqltoolRB.plvar_tildedash_nomoreargs.getString(
                            m.group(3)));
                }


                shared.userVars.remove(varName);

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                    return;
                } catch (UnsupportedEncodingException use) {
                    throw new BadSpecial(
                            SqltoolRB.encode_fail.getString(m.group(3)));
                }
                if (m.groupCount() > 2 && m.group(3) != null) {
                    shared.userVars.put(varName, m.group(3));
                } else {
                    shared.userVars.remove(varName);
                }
                updateUserSettings();

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    //WebAppDeployControlleryController entry = new WebAppDeployControlleryController(this, contextPath);
    HashMap<String,Object> varMap = new HashMap<String,Object>();
    // entry.getVariableMap();
        
    for (int j = 0; j <= matcher.groupCount(); j++) {
      vars.add(matcher.group(j));
      varMap.put("app" + j, matcher.group(j));
    }


    varMap.put("regexp", vars);

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    return this.link != null && this.reference == null;
  }


  private static boolean isHFile(final Path path) {
    Matcher m = HFILE_NAME_PATTERN.matcher(path.getName());
    return m.matches() && m.groupCount() > 0;
  }


  /**
   * @param p Path to check.
   * @return True if the path has format of a HStoreFile reference.

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   * @param name file name to check.
   * @return True if the path has format of a HStoreFile reference.
   */
  public static boolean isReference(final String name) {
    Matcher m = REF_NAME_PATTERN.matcher(name);
    return m.matches() && m.groupCount() > 1;
  }


  /*
   * Return path to the file referred to by a Reference.  Presumes a directory
   * hierarchy of <code>${hbase.rootdir}/tablename/regionname/familyname</code>.

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        String matchedValue = value;
        // if we cannot find a match set the value to empty string
        Matcher matcher = pattern.matcher(value);
        if (matcher.matches()) {
            
            if (matcher.groupCount() >= group) {
                matchedValue = matcher.group(group);
            } else {
                if (synLog.isTraceOrDebugEnabled()) {
                    String msg = "Failed to get a match for regx : " +
                            pattern.toString() + " with the property value :" +

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