Program: 139971
Project: 139971
Buggy source:
/** 
 * DOC qzhang Comment method "createIndicatorUnit".
 * @param pfile
 * @param columnIndicator
 * @param analysis
 * @return
 */
public static IndicatorUnit createIndicatorUnit(IFile pfile,ColumnIndicator columnIndicator,Analysis analysis){
  Pattern pattern=PatternResourceFileHelper.getInstance().findPattern(pfile);
  String expressionType=DomainHelper.getExpressionType(pattern);
  boolean isSQLPattern=(ExpressionType.SQL_LIKE.getLiteral().equals(expressionType));
  PatternMatchingIndicator patternMatchingIndicator=isSQLPattern ? PatternIndicatorFactory.createSqlPatternMatchingIndicator(pattern) : PatternIndicatorFactory.createRegexpMatchingIndicator(pattern);
  DbmsLanguage dbmsLanguage=DbmsLanguageFactory.createDbmsLanguage(analysis);
  if (ExpressionType.REGEXP.getLiteral().equals(expressionType) && dbmsLanguage.getRegexp(pattern) == null) {
    MessageDialogWithToggle.openInformation(null,DefaultMessagesImpl.getString("String_Node_Str"),DefaultMessagesImpl.getString("String_Node_Str"));
    return null;
  }
  DataManager dm=analysis.getContext().getConnection();
  TypedReturnCode<Connection> trc=JavaSqlFactory.createConnection((TdDataProvider)dm);
  if (trc != null) {
    Connection conn=trc.getObject();
    try {
      SoftwareSystem softwareSystem=DatabaseContentRetriever.getSoftwareSystem(conn);
      dbmsLanguage=DbmsLanguageFactory.createDbmsLanguage(softwareSystem);
    }
 catch (    SQLException e) {
      log.error(e,e);
    }
  }
  if (!(dbmsLanguage.supportRegexp() || isDBDefinedUDF(dbmsLanguage))) {
    MessageDialogWithToggle.openInformation(null,DefaultMessagesImpl.getString("String_Node_Str"),DefaultMessagesImpl.getString("String_Node_Str"));
    return null;
  }
  if (!DefinitionHandler.getInstance().setDefaultIndicatorDefinition(patternMatchingIndicator)) {
    log.error("String_Node_Str" + patternMatchingIndicator.getName());
  }
  IndicatorEnum type=IndicatorEnum.findIndicatorEnum(patternMatchingIndicator.eClass());
  IndicatorUnit addIndicatorUnit=columnIndicator.addSpecialIndicator(type,patternMatchingIndicator);
  DependenciesHandler.getInstance().setUsageDependencyOn(analysis,pattern);
  return addIndicatorUnit;
}

Fixed version (ground truth):
/** 
 * DOC qzhang Comment method "createIndicatorUnit".
 * @param pfile
 * @param columnIndicator
 * @param analysis
 * @return
 */
public static IndicatorUnit createIndicatorUnit(IFile pfile,ColumnIndicator columnIndicator,Analysis analysis){
  Pattern pattern=PatternResourceFileHelper.getInstance().findPattern(pfile);
  for (  Indicator indicator : columnIndicator.getIndicators()) {
    if (pattern.getName().equals(indicator.getName())) {
      return null;
    }
  }
  String expressionType=DomainHelper.getExpressionType(pattern);
  boolean isSQLPattern=(ExpressionType.SQL_LIKE.getLiteral().equals(expressionType));
  PatternMatchingIndicator patternMatchingIndicator=isSQLPattern ? PatternIndicatorFactory.createSqlPatternMatchingIndicator(pattern) : PatternIndicatorFactory.createRegexpMatchingIndicator(pattern);
  DbmsLanguage dbmsLanguage=DbmsLanguageFactory.createDbmsLanguage(analysis);
  if (ExpressionType.REGEXP.getLiteral().equals(expressionType) && dbmsLanguage.getRegexp(pattern) == null) {
    MessageDialogWithToggle.openInformation(null,DefaultMessagesImpl.getString("String_Node_Str"),DefaultMessagesImpl.getString("String_Node_Str"));
    return null;
  }
  DataManager dm=analysis.getContext().getConnection();
  TypedReturnCode<Connection> trc=JavaSqlFactory.createConnection((TdDataProvider)dm);
  if (trc != null) {
    Connection conn=trc.getObject();
    try {
      SoftwareSystem softwareSystem=DatabaseContentRetriever.getSoftwareSystem(conn);
      dbmsLanguage=DbmsLanguageFactory.createDbmsLanguage(softwareSystem);
    }
 catch (    SQLException e) {
      log.error(e,e);
    }
  }
  if (!(dbmsLanguage.supportRegexp() || isDBDefinedUDF(dbmsLanguage))) {
    MessageDialogWithToggle.openInformation(null,DefaultMessagesImpl.getString("String_Node_Str"),DefaultMessagesImpl.getString("String_Node_Str"));
    return null;
  }
  if (!DefinitionHandler.getInstance().setDefaultIndicatorDefinition(patternMatchingIndicator)) {
    log.error("String_Node_Str" + patternMatchingIndicator.getName());
  }
  IndicatorEnum type=IndicatorEnum.findIndicatorEnum(patternMatchingIndicator.eClass());
  IndicatorUnit addIndicatorUnit=columnIndicator.addSpecialIndicator(type,patternMatchingIndicator);
  DependenciesHandler.getInstance().setUsageDependencyOn(analysis,pattern);
  return addIndicatorUnit;
}